Mesa Weather Records (USC00025467)

Record envelope, standing records and threshold days for Mesa (USC00025467), Arizona, United States, with 122 years of record.

Key Facts for Mesa

Mesa (USC00025467) is a weather station in Arizona, United States at 33.41 latitude and -111.82 longitude, 376 m (1,235 ft) above sea level.
The station reports from 1896 to 2017, 122 years of record.
1,464 records set at Mesa still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mesa set a daily record precipitation of 1.5 mm (0.06 in) on 9 May 2017.

About the Station

Location: Arizona, United States, 33.41 latitude, -111.82 longitude.
Elevation: 376 m (1,235 ft).
Period of record: 1896 to 2017, 122 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Mesa. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Mesa, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.7 C (89.1 F)	-9.4 C (15.1 F)	n/a	n/a
Feb	35.0 C (95.0 F)	-7.2 C (19.0 F)	n/a	n/a
Mar	37.2 C (99.0 F)	-4.4 C (24.1 F)	n/a	n/a
Apr	41.1 C (106.0 F)	-1.1 C (30.0 F)	n/a	n/a
May	47.8 C (118.0 F)	2.8 C (37.0 F)	n/a	n/a
Jun	46.7 C (116.1 F)	6.1 C (43.0 F)	n/a	n/a
Jul	48.3 C (118.9 F)	12.2 C (54.0 F)	n/a	n/a
Aug	46.1 C (115.0 F)	10.6 C (51.1 F)	n/a	n/a
Sep	45.0 C (113.0 F)	4.4 C (39.9 F)	n/a	n/a
Oct	41.7 C (107.1 F)	-1.1 C (30.0 F)	n/a	n/a
Nov	36.1 C (97.0 F)	-5.6 C (21.9 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-8.3 C (17.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mesa still stand. 1910 holds the most, with 56.

Standing records at Mesa by the year they were set
Year set	Standing records
1896	30
1897	18
1898	13
1899	19
1900	11
1901	15
1902	9
1903	17
1904	25
1905	22
1906	36
1907	16
1908	12
1909	17
1910	56
1911	17
1912	16
1915	14
1916	25
1917	16
1918	20
1919	21
1920	29
1921	29
1922	25
1923	20
1924	12
1925	19
1926	13
1927	19
1928	11
1929	9
1930	22
1931	13
1932	12
1933	22
1934	17
1935	13
1936	9
1937	12
1938	21
1939	13
1940	16
1941	2
1942	7
1943	8
1944	12
1945	10
1946	10
1947	18
1948	15
1949	22
1950	25
1951	10
1952	9
1953	15
1954	14
1955	20
1956	11
1957	16
1958	12
1959	10
1960	12
1961	4
1962	14
1963	9
1964	6
1965	16
1966	8
1967	5
1968	6
1969	12
1970	11
1971	19
1972	16
1973	3
1974	11
1975	9
1976	14
1977	21
1978	19
1979	16
1980	27
1981	18
1982	15
1983	16
1984	19
1985	26
1986	26
1987	24
1988	15

All-Time Record Progression

2 new records

2 all-time records were set at Mesa between 4 January 1950 and 7 July 1983. Each dot is a new record.

When Mesa set new all-time records
Date	Kind	Detail
1950-01-04	Record low minimum temperature	Record low minimum temperature -9.4 C (15.1 F)
1983-07-07	Record high minimum temperature	Record high minimum temperature 33.3 C (91.9 F)

Wettest Day of Each Month

Aug: 70.6 mm (2.8 in)

The wettest day on record for each calendar month at Mesa. The most was 70.6 mm (2.8 in) on 1 August 1906.

Record daily precipitation for each month at Mesa
Month	Record daily precipitation (mm)	Date
Jan	41.1 mm (1.6 in)	4 January 2005
Feb	36.1 mm (1.4 in)	14 February 2003
Mar	41.4 mm (1.6 in)	4 March 1983
Apr	35.1 mm (1.4 in)	11 April 1905
May	30.5 mm (1.2 in)	5 May 1976
Jun	26.2 mm (1.0 in)	30 June 1911
Jul	58.2 mm (2.3 in)	26 July 2006
Aug	70.6 mm (2.8 in)	1 August 1906
Sep	69.9 mm (2.8 in)	8 September 2014
Oct	56.9 mm (2.2 in)	22 October 2004
Nov	58.4 mm (2.3 in)	15 November 1993
Dec	57.9 mm (2.3 in)	15 December 1967

Period of Record Coverage

1896 to 1988

91 years of record at Mesa, 1896 to 1988. 4 years have data for under 90 percent of days and are left out of rankings: 1896, 1912, 1931, 1988.

Days with data per year at Mesa
Year	Days with data	Share of year	Complete
1896	245	67%	No
1897	365	100%	Yes
1898	365	100%	Yes
1899	365	100%	Yes
1900	365	100%	Yes
1901	360	99%	Yes
1902	363	99%	Yes
1903	365	100%	Yes
1904	366	100%	Yes
1905	362	99%	Yes
1906	362	99%	Yes
1907	364	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	365	100%	Yes
1911	364	100%	Yes
1912	304	83%	No
1915	364	100%	Yes
1916	364	99%	Yes
1917	365	100%	Yes
1918	350	96%	Yes
1919	346	95%	Yes
1920	341	93%	Yes
1921	330	90%	Yes
1922	345	95%	Yes
1923	353	97%	Yes
1924	336	92%	Yes
1925	343	94%	Yes
1926	337	92%	Yes
1927	331	91%	Yes
1928	352	96%	Yes
1929	359	98%	Yes
1930	363	99%	Yes
1931	311	85%	No
1932	361	99%	Yes
1933	360	99%	Yes
1934	336	92%	Yes
1935	337	92%	Yes
1936	345	94%	Yes
1937	350	96%	Yes
1938	356	98%	Yes
1939	360	99%	Yes
1940	365	100%	Yes
1941	363	99%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	365	100%	Yes
1945	354	97%	Yes
1946	358	98%	Yes
1947	360	99%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	362	99%	Yes
1952	364	99%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	361	99%	Yes
1958	354	97%	Yes
1959	362	99%	Yes
1960	364	99%	Yes
1961	364	100%	Yes
1962	360	99%	Yes
1963	365	100%	Yes
1964	361	99%	Yes
1965	358	98%	Yes
1966	356	98%	Yes
1967	362	99%	Yes
1968	366	100%	Yes
1969	364	100%	Yes
1970	363	99%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	364	100%	Yes
1975	365	100%	Yes
1976	364	99%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	363	99%	Yes
1981	365	100%	Yes
1982	359	98%	Yes
1983	362	99%	Yes
1984	361	99%	Yes
1985	357	98%	Yes
1986	329	90%	Yes
1987	361	99%	Yes
1988	210	57%	No

Latest Records

Latest records at Mesa
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 May 2017	Mesa, US	daily rain	1.5 mm (0.06 in)	0.2 mm (0.01 in)	104 years	20 of 100 (Routine)
1 September 2015	Mesa, US	daily rain (Tie)	15.2 mm (0.6 in)	tie	60 years	7 of 100 (Routine)
29 August 2015	Mesa, US	daily rain	38.1 mm (1.5 in)	17.8 mm (0.7 in)	53 years	47 of 100 (Notable)
5 June 2015	Mesa, US	daily rain	4.3 mm (0.17 in)	3.0 mm (0.12 in)	48 years	20 of 100 (Routine)
4 June 2015	Mesa, US	daily rain (Tie)	0.3 mm (0.01 in)	tie	36 years	5 of 100 (Routine)
16 May 2015	Mesa, US	daily rain	16.5 mm (0.6 in)	13.7 mm (0.5 in)	21 years	20 of 100 (Routine)
4 May 2015	Mesa, US	daily rain	17.3 mm (0.7 in)	6.9 mm (0.27 in)	84 years	20 of 100 (Routine)
3 May 2015	Mesa, US	daily rain	0.3 mm (0.01 in)	0.3 mm (0.01 in)	117 years	20 of 100 (Routine)
28 September 2014	Mesa, US	daily rain	47.2 mm (1.9 in)	5.0 mm (0.20 in)	72 years	36 of 100 (Notable)
8 September 2014	Mesa, US	monthly rain	69.9 mm (2.8 in)	10.2 mm (0.4 in)	97 years	59 of 100 (Notable)
2 March 2014	Mesa, US	daily rain	25.4 mm (1.0 in)	7.4 mm (0.29 in)	44 years	33 of 100 (Routine)
22 November 2013	Mesa, US	daily rain	43.4 mm (1.7 in)	34.5 mm (1.4 in)	94 years	78 of 100 (Major)
10 September 2013	Mesa, US	daily rain	19.1 mm (0.8 in)	8.7 mm (0.34 in)	40 years	20 of 100 (Routine)
20 July 2013	Mesa, US	daily rain	26.7 mm (1.1 in)	8.9 mm (0.35 in)	116 years	49 of 100 (Notable)
9 March 2013	Mesa, US	daily rain	27.9 mm (1.1 in)	3.8 mm (0.15 in)	100 years	45 of 100 (Notable)
27 January 2013	Mesa, US	daily rain	25.4 mm (1.0 in)	10.9 mm (0.4 in)	12 years	28 of 100 (Routine)
16 December 2012	Mesa, US	daily rain	13.2 mm (0.5 in)	1.0 mm (0.04 in)	74 years	20 of 100 (Routine)
5 November 2011	Mesa, US	daily rain	17.3 mm (0.7 in)	14.0 mm (0.6 in)	105 years	20 of 100 (Routine)
10 July 2011	Mesa, US	daily rain	2.8 mm (0.11 in)	1.0 mm (0.04 in)	13 years	15 of 100 (Routine)
30 December 2010	Mesa, US	daily rain	25.7 mm (1.0 in)	1.6 mm (0.06 in)	69 years	32 of 100 (Routine)

Climate Trend

83 complete years, 1897 to 1987

One stripe for each of 83 complete years at Mesa, 1897 to 1987. Blue stripes are years cooler than the station's own mean of 20.5 C (68.9 F); red stripes are warmer. The coolest year was 1932, at 18.9 C (66.1 F), and the warmest was 1986, at 22.7 C (72.9 F). The strongest colour marks a difference of 2.3 C (4.1 F).

Annual mean temperature at Mesa as warming stripes, 1897 to 1987
Year	Annual mean temperature	Difference from the station mean
1897	20.2 C	-0.36 C
1898	20.2 C	-0.29 C
1899	19.5 C	-1.03 C
1900	20.7 C	+0.19 C
1901	19.9 C	-0.60 C
1902	20.1 C	-0.46 C
1903	20.7 C	+0.19 C
1904	20.9 C	+0.37 C
1905	20.7 C	+0.15 C
1906	20.7 C	+0.20 C
1907	20.7 C	+0.22 C
1908	20.4 C	-0.14 C
1909	20.4 C	-0.10 C
1910	21.8 C	+1.24 C
1911	19.7 C	-0.80 C
1915	19.3 C	-1.20 C
1916	19.8 C	-0.71 C
1917	19.9 C	-0.65 C
1918	19.3 C	-1.24 C
1919	19.1 C	-1.40 C
1920	19.0 C	-1.56 C
1921	19.9 C	-0.60 C
1922	19.2 C	-1.32 C
1924	19.8 C	-0.71 C
1926	20.0 C	-0.48 C
1928	20.1 C	-0.42 C
1929	19.5 C	-1.03 C
1930	19.6 C	-0.91 C
1932	18.9 C	-1.59 C
1933	19.3 C	-1.19 C
1934	21.2 C	+0.72 C
1935	19.5 C	-1.01 C
1936	21.1 C	+0.55 C
1937	20.2 C	-0.29 C
1938	19.7 C	-0.78 C
1939	20.1 C	-0.45 C
1940	20.8 C	+0.31 C
1941	19.7 C	-0.77 C
1942	19.9 C	-0.60 C
1943	20.7 C	+0.18 C
1944	19.2 C	-1.30 C
1946	20.1 C	-0.41 C
1947	20.4 C	-0.10 C
1948	19.9 C	-0.63 C
1949	19.9 C	-0.61 C
1950	21.0 C	+0.44 C
1951	20.4 C	-0.15 C
1952	20.2 C	-0.35 C
1953	20.6 C	+0.04 C
1954	21.3 C	+0.83 C
1955	19.8 C	-0.69 C
1956	20.3 C	-0.23 C
1957	20.5 C	+0.01 C
1958	21.3 C	+0.75 C
1959	21.2 C	+0.69 C
1960	20.8 C	+0.25 C
1961	20.9 C	+0.35 C
1962	21.2 C	+0.64 C
1963	21.1 C	+0.57 C
1964	20.0 C	-0.56 C
1965	20.4 C	-0.12 C
1966	21.2 C	+0.69 C
1967	20.8 C	+0.31 C
1968	20.6 C	+0.08 C
1969	21.1 C	+0.62 C
1970	20.8 C	+0.31 C
1971	20.2 C	-0.28 C
1972	21.1 C	+0.59 C
1973	20.6 C	+0.11 C
1974	21.1 C	+0.60 C
1975	20.5 C	-0.02 C
1976	21.2 C	+0.67 C
1977	21.9 C	+1.34 C
1978	21.7 C	+1.18 C
1979	21.4 C	+0.93 C
1980	22.0 C	+1.48 C
1981	22.5 C	+2.02 C
1982	21.3 C	+0.80 C
1983	21.4 C	+0.88 C
1984	21.7 C	+1.23 C
1985	21.9 C	+1.43 C
1986	22.7 C	+2.23 C
1987	22.3 C	+1.83 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1897 to 1987. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 83 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Mesa
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.2) per decade	0.3 F (0.2 to 0.4) per decade	1897 to 1987	83	Rise
Mean daily maximum	0.04 C (-0.02 to 0.10) per decade	0.08 F (-0.03 to 0.18) per decade	1897 to 1987	83	Not clearly different from zero
Mean daily minimum	0.3 C (0.3 to 0.4) per decade	0.6 F (0.5 to 0.7) per decade	1897 to 1987	83	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1896 to 2017

Yearly extremes at Mesa: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	48.3 C (118.9 F)	1907	44.4 C (111.9 F)	91
Coldest night (TNn)	-9.4 C (15.1 F)	1950	-5.0 C (23.0 F)	91
Wettest day (Rx1day)	70.6 mm (2.8 in)	1906	29.2 mm (1.1 in)	120
Wettest five days (Rx5day)	128.3 mm (5.1 in)	1911	39.8 mm (1.6 in)	120
Longest dry spell (CDD)	154 days	1924	81 days	120

Hottest day (TXx)

The hottest day of the year at Mesa, 1896 to 2017. The record is 48.3 C (118.9 F) in 1907, marked on the chart; the median year is 44.4 C (111.9 F).

Hottest day (TXx) at Mesa by year
Year	Hottest day (TXx)
1896	46.7 C (116.1 F)
1897	43.9 C (111.0 F)
1898	45.0 C (113.0 F)
1899	43.9 C (111.0 F)
1900	44.4 C (111.9 F)
1901	45.0 C (113.0 F)
1902	46.1 C (115.0 F)
1903	45.6 C (114.1 F)
1904	44.4 C (111.9 F)
1905	47.8 C (118.0 F)
1906	45.6 C (114.1 F)
1907	48.3 C (118.9 F)
1908	46.1 C (115.0 F)
1909	45.6 C (114.1 F)
1910	47.8 C (118.0 F)
1911	42.8 C (109.0 F)
1912	43.3 C (109.9 F)
1915	44.4 C (111.9 F)
1916	44.4 C (111.9 F)
1917	43.3 C (109.9 F)
1918	45.0 C (113.0 F)
1919	43.9 C (111.0 F)
1920	43.3 C (109.9 F)
1921	43.3 C (109.9 F)
1922	45.0 C (113.0 F)
1923	43.3 C (109.9 F)
1924	43.9 C (111.0 F)
1925	46.7 C (116.1 F)
1926	45.6 C (114.1 F)
1927	44.4 C (111.9 F)
1928	44.4 C (111.9 F)
1929	46.1 C (115.0 F)
1930	42.2 C (108.0 F)
1931	41.7 C (107.1 F)
1932	42.2 C (108.0 F)
1933	44.4 C (111.9 F)
1934	43.9 C (111.0 F)
1935	42.8 C (109.0 F)
1936	45.0 C (113.0 F)
1937	43.9 C (111.0 F)
1938	43.9 C (111.0 F)
1939	44.4 C (111.9 F)
1940	46.1 C (115.0 F)
1941	42.2 C (108.0 F)
1942	44.4 C (111.9 F)
1943	45.6 C (114.1 F)
1944	44.4 C (111.9 F)
1945	45.0 C (113.0 F)
1946	43.9 C (111.0 F)
1947	45.0 C (113.0 F)
1948	44.4 C (111.9 F)
1949	44.4 C (111.9 F)
1950	44.4 C (111.9 F)
1951	44.4 C (111.9 F)
1952	43.9 C (111.0 F)
1953	45.6 C (114.1 F)
1954	44.4 C (111.9 F)
1955	44.4 C (111.9 F)
1956	44.4 C (111.9 F)
1957	45.6 C (114.1 F)
1958	47.2 C (117.0 F)
1959	44.4 C (111.9 F)
1960	45.6 C (114.1 F)
1961	44.4 C (111.9 F)
1962	45.0 C (113.0 F)
1963	44.4 C (111.9 F)
1964	44.4 C (111.9 F)
1965	44.4 C (111.9 F)
1966	44.4 C (111.9 F)
1967	43.3 C (109.9 F)
1968	45.6 C (114.1 F)
1969	44.4 C (111.9 F)
1970	46.7 C (116.1 F)
1971	44.4 C (111.9 F)
1972	45.6 C (114.1 F)
1973	45.6 C (114.1 F)
1974	46.1 C (115.0 F)
1975	45.0 C (113.0 F)
1976	44.4 C (111.9 F)
1977	45.0 C (113.0 F)
1978	45.0 C (113.0 F)
1979	46.7 C (116.1 F)
1980	45.6 C (114.1 F)
1981	45.0 C (113.0 F)
1982	44.4 C (111.9 F)
1983	46.1 C (115.0 F)
1984	44.4 C (111.9 F)
1985	46.1 C (115.0 F)
1986	45.6 C (114.1 F)
1987	45.0 C (113.0 F)
1988	46.1 C (115.0 F)
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a

Coldest night (TNn)

The coldest night of the year at Mesa, 1896 to 2017. The record is -9.4 C (15.1 F) in 1950, marked on the chart; the median year is -5.0 C (23.0 F).

Coldest night (TNn) at Mesa by year
Year	Coldest night (TNn)
1896	0.0 C (32.0 F)
1897	-4.4 C (24.1 F)
1898	-4.4 C (24.1 F)
1899	-4.4 C (24.1 F)
1900	-7.8 C (18.0 F)
1901	-8.3 C (17.1 F)
1902	-4.4 C (24.1 F)
1903	-4.4 C (24.1 F)
1904	-7.8 C (18.0 F)
1905	-3.9 C (25.0 F)
1906	-5.0 C (23.0 F)
1907	-3.3 C (26.1 F)
1908	-2.2 C (28.0 F)
1909	-6.1 C (21.0 F)
1910	-5.6 C (21.9 F)
1911	-6.1 C (21.0 F)
1912	-6.7 C (19.9 F)
1915	-6.1 C (21.0 F)
1916	-7.2 C (19.0 F)
1917	-3.9 C (25.0 F)
1918	-5.0 C (23.0 F)
1919	-5.0 C (23.0 F)
1920	-6.1 C (21.0 F)
1921	-5.0 C (23.0 F)
1922	-6.7 C (19.9 F)
1923	-3.9 C (25.0 F)
1924	-4.4 C (24.1 F)
1925	-6.7 C (19.9 F)
1926	-6.7 C (19.9 F)
1927	-3.9 C (25.0 F)
1928	-5.6 C (21.9 F)
1929	-5.6 C (21.9 F)
1930	-7.2 C (19.0 F)
1931	-5.6 C (21.9 F)
1932	-7.2 C (19.0 F)
1933	-7.2 C (19.0 F)
1934	-6.7 C (19.9 F)
1935	-5.6 C (21.9 F)
1936	-4.4 C (24.1 F)
1937	-7.2 C (19.0 F)
1938	-5.6 C (21.9 F)
1939	-5.6 C (21.9 F)
1940	-6.7 C (19.9 F)
1941	-2.8 C (27.0 F)
1942	-3.9 C (25.0 F)
1943	-3.3 C (26.1 F)
1944	-3.9 C (25.0 F)
1945	-5.0 C (23.0 F)
1946	-4.4 C (24.1 F)
1947	-3.9 C (25.0 F)
1948	-6.7 C (19.9 F)
1949	-6.1 C (21.0 F)
1950	-9.4 C (15.1 F)
1951	-5.6 C (21.9 F)
1952	-4.4 C (24.1 F)
1953	-7.2 C (19.0 F)
1954	-6.1 C (21.0 F)
1955	-6.1 C (21.0 F)
1956	-5.0 C (23.0 F)
1957	-1.1 C (30.0 F)
1958	-3.3 C (26.1 F)
1959	-2.8 C (27.0 F)
1960	-5.6 C (21.9 F)
1961	-2.2 C (28.0 F)
1962	-6.7 C (19.9 F)
1963	-7.2 C (19.0 F)
1964	-6.7 C (19.9 F)
1965	-3.3 C (26.1 F)
1966	-3.3 C (26.1 F)
1967	-3.9 C (25.0 F)
1968	-5.6 C (21.9 F)
1969	-3.9 C (25.0 F)
1970	-4.4 C (24.1 F)
1971	-6.1 C (21.0 F)
1972	-3.9 C (25.0 F)
1973	-2.8 C (27.0 F)
1974	-4.4 C (24.1 F)
1975	-2.8 C (27.0 F)
1976	-5.0 C (23.0 F)
1977	-2.2 C (28.0 F)
1978	-5.0 C (23.0 F)
1979	-2.8 C (27.0 F)
1980	-0.6 C (30.9 F)
1981	-1.1 C (30.0 F)
1982	-0.6 C (30.9 F)
1983	-1.1 C (30.0 F)
1984	-1.7 C (28.9 F)
1985	-3.9 C (25.0 F)
1986	0.0 C (32.0 F)
1987	-5.0 C (23.0 F)
1988	-0.6 C (30.9 F)
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a

Wettest day (Rx1day)

The wettest day of the year at Mesa, 1896 to 2017. The record is 70.6 mm (2.8 in) in 1906, marked on the chart; the median year is 29.2 mm (1.1 in).

Wettest day (Rx1day) at Mesa by year
Year	Wettest day (Rx1day)
1896	26.9 mm (1.1 in)
1897	27.9 mm (1.1 in)
1898	38.1 mm (1.5 in)
1899	28.4 mm (1.1 in)
1900	40.6 mm (1.6 in)
1901	29.2 mm (1.1 in)
1902	24.4 mm (1.0 in)
1903	27.2 mm (1.1 in)
1904	33.8 mm (1.3 in)
1905	35.1 mm (1.4 in)
1906	70.6 mm (2.8 in)
1907	28.4 mm (1.1 in)
1908	30.2 mm (1.2 in)
1909	28.2 mm (1.1 in)
1910	25.9 mm (1.0 in)
1911	51.3 mm (2.0 in)
1912	25.4 mm (1.0 in)
1915	43.9 mm (1.7 in)
1916	59.7 mm (2.4 in)
1917	38.9 mm (1.5 in)
1918	22.4 mm (0.9 in)
1919	53.1 mm (2.1 in)
1920	33.3 mm (1.3 in)
1921	20.3 mm (0.8 in)
1922	28.2 mm (1.1 in)
1923	38.9 mm (1.5 in)
1924	20.8 mm (0.8 in)
1925	22.6 mm (0.9 in)
1926	41.1 mm (1.6 in)
1927	41.4 mm (1.6 in)
1928	30.2 mm (1.2 in)
1929	19.6 mm (0.8 in)
1930	22.9 mm (0.9 in)
1931	30.7 mm (1.2 in)
1932	30.0 mm (1.2 in)
1933	24.4 mm (1.0 in)
1934	21.8 mm (0.9 in)
1935	20.1 mm (0.8 in)
1936	46.2 mm (1.8 in)
1937	36.1 mm (1.4 in)
1938	16.5 mm (0.6 in)
1939	14.0 mm (0.6 in)
1940	29.0 mm (1.1 in)
1941	42.2 mm (1.7 in)
1942	19.1 mm (0.8 in)
1943	59.4 mm (2.3 in)
1944	31.8 mm (1.3 in)
1945	9.4 mm (0.37 in)
1946	41.9 mm (1.6 in)
1947	38.9 mm (1.5 in)
1948	12.4 mm (0.5 in)
1949	24.6 mm (1.0 in)
1950	18.8 mm (0.7 in)
1951	66.8 mm (2.6 in)
1952	26.2 mm (1.0 in)
1953	34.3 mm (1.4 in)
1954	23.1 mm (0.9 in)
1955	47.0 mm (1.9 in)
1956	13.7 mm (0.5 in)
1957	27.7 mm (1.1 in)
1958	35.8 mm (1.4 in)
1959	35.6 mm (1.4 in)
1960	25.1 mm (1.0 in)
1961	20.3 mm (0.8 in)
1962	20.6 mm (0.8 in)
1963	29.7 mm (1.2 in)
1964	30.2 mm (1.2 in)
1965	35.6 mm (1.4 in)
1966	44.5 mm (1.8 in)
1967	57.9 mm (2.3 in)
1968	26.7 mm (1.1 in)
1969	24.4 mm (1.0 in)
1970	34.3 mm (1.4 in)
1971	23.4 mm (0.9 in)
1972	25.9 mm (1.0 in)
1973	25.9 mm (1.0 in)
1974	33.3 mm (1.3 in)
1975	25.4 mm (1.0 in)
1976	30.5 mm (1.2 in)
1977	20.6 mm (0.8 in)
1978	40.6 mm (1.6 in)
1979	25.4 mm (1.0 in)
1980	18.5 mm (0.7 in)
1981	17.8 mm (0.7 in)
1982	20.8 mm (0.8 in)
1983	41.4 mm (1.6 in)
1984	42.7 mm (1.7 in)
1985	29.0 mm (1.1 in)
1986	22.9 mm (0.9 in)
1987	29.2 mm (1.1 in)
1988	48.3 mm (1.9 in)
1989	34.0 mm (1.3 in)
1990	29.7 mm (1.2 in)
1991	33.3 mm (1.3 in)
1992	51.1 mm (2.0 in)
1993	58.4 mm (2.3 in)
1994	20.6 mm (0.8 in)
1995	30.7 mm (1.2 in)
1996	22.4 mm (0.9 in)
1997	21.3 mm (0.8 in)
1998	29.2 mm (1.1 in)
1999	20.8 mm (0.8 in)
2000	37.1 mm (1.5 in)
2001	27.2 mm (1.1 in)
2002	24.6 mm (1.0 in)
2003	36.1 mm (1.4 in)
2004	56.9 mm (2.2 in)
2005	41.1 mm (1.6 in)
2006	58.2 mm (2.3 in)
2007	43.2 mm (1.7 in)
2008	35.6 mm (1.4 in)
2009	21.6 mm (0.9 in)
2010	51.3 mm (2.0 in)
2011	20.1 mm (0.8 in)
2012	16.8 mm (0.7 in)
2013	43.4 mm (1.7 in)
2014	69.9 mm (2.8 in)
2015	38.1 mm (1.5 in)
2016	20.1 mm (0.8 in)
2017	19.6 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mesa, 1896 to 2017. The record is 128.3 mm (5.1 in) in 1911, marked on the chart; the median year is 39.8 mm (1.6 in).

Wettest five days (Rx5day) at Mesa by year
Year	Wettest five days (Rx5day)
1896	49.6 mm (2.0 in)
1897	77.1 mm (3.0 in)
1898	59.4 mm (2.3 in)
1899	32.0 mm (1.3 in)
1900	58.4 mm (2.3 in)
1901	63.2 mm (2.5 in)
1902	32.0 mm (1.3 in)
1903	35.0 mm (1.4 in)
1904	35.3 mm (1.4 in)
1905	68.0 mm (2.7 in)
1906	70.6 mm (2.8 in)
1907	34.8 mm (1.4 in)
1908	47.2 mm (1.9 in)
1909	47.3 mm (1.9 in)
1910	29.5 mm (1.2 in)
1911	128.3 mm (5.1 in)
1912	38.1 mm (1.5 in)
1915	59.6 mm (2.3 in)
1916	71.9 mm (2.8 in)
1917	54.4 mm (2.1 in)
1918	34.9 mm (1.4 in)
1919	53.1 mm (2.1 in)
1920	39.1 mm (1.5 in)
1921	29.5 mm (1.2 in)
1922	31.0 mm (1.2 in)
1923	39.8 mm (1.6 in)
1924	26.4 mm (1.0 in)
1925	34.5 mm (1.4 in)
1926	49.2 mm (1.9 in)
1927	46.7 mm (1.8 in)
1928	42.4 mm (1.7 in)
1929	21.1 mm (0.8 in)
1930	39.6 mm (1.6 in)
1931	81.7 mm (3.2 in)
1932	44.9 mm (1.8 in)
1933	39.6 mm (1.6 in)
1934	35.8 mm (1.4 in)
1935	37.8 mm (1.5 in)
1936	91.4 mm (3.6 in)
1937	43.0 mm (1.7 in)
1938	33.5 mm (1.3 in)
1939	27.7 mm (1.1 in)
1940	53.1 mm (2.1 in)
1941	61.7 mm (2.4 in)
1942	33.8 mm (1.3 in)
1943	84.1 mm (3.3 in)
1944	34.1 mm (1.3 in)
1945	19.0 mm (0.7 in)
1946	66.6 mm (2.6 in)
1947	38.9 mm (1.5 in)
1948	28.4 mm (1.1 in)
1949	39.4 mm (1.6 in)
1950	21.1 mm (0.8 in)
1951	82.4 mm (3.2 in)
1952	28.7 mm (1.1 in)
1953	45.5 mm (1.8 in)
1954	27.6 mm (1.1 in)
1955	90.5 mm (3.6 in)
1956	21.8 mm (0.9 in)
1957	40.7 mm (1.6 in)
1958	48.3 mm (1.9 in)
1959	58.4 mm (2.3 in)
1960	35.5 mm (1.4 in)
1961	21.6 mm (0.9 in)
1962	35.8 mm (1.4 in)
1963	32.2 mm (1.3 in)
1964	34.0 mm (1.3 in)
1965	40.6 mm (1.6 in)
1966	64.7 mm (2.5 in)
1967	82.8 mm (3.3 in)
1968	35.1 mm (1.4 in)
1969	30.8 mm (1.2 in)
1970	45.0 mm (1.8 in)
1971	32.3 mm (1.3 in)
1972	49.6 mm (2.0 in)
1973	27.2 mm (1.1 in)
1974	57.2 mm (2.3 in)
1975	25.7 mm (1.0 in)
1976	38.4 mm (1.5 in)
1977	27.3 mm (1.1 in)
1978	52.8 mm (2.1 in)
1979	41.9 mm (1.6 in)
1980	47.0 mm (1.9 in)
1981	31.8 mm (1.3 in)
1982	36.9 mm (1.5 in)
1983	67.4 mm (2.7 in)
1984	48.5 mm (1.9 in)
1985	32.8 mm (1.3 in)
1986	39.4 mm (1.6 in)
1987	73.9 mm (2.9 in)
1988	50.6 mm (2.0 in)
1989	40.1 mm (1.6 in)
1990	38.1 mm (1.5 in)
1991	34.1 mm (1.3 in)
1992	54.7 mm (2.2 in)
1993	93.9 mm (3.7 in)
1994	31.0 mm (1.2 in)
1995	39.6 mm (1.6 in)
1996	39.7 mm (1.6 in)
1997	31.0 mm (1.2 in)
1998	37.1 mm (1.5 in)
1999	33.0 mm (1.3 in)
2000	67.1 mm (2.6 in)
2001	43.2 mm (1.7 in)
2002	31.2 mm (1.2 in)
2003	56.4 mm (2.2 in)
2004	56.9 mm (2.2 in)
2005	54.3 mm (2.1 in)
2006	63.8 mm (2.5 in)
2007	43.5 mm (1.7 in)
2008	58.7 mm (2.3 in)
2009	34.6 mm (1.4 in)
2010	85.1 mm (3.4 in)
2011	35.3 mm (1.4 in)
2012	32.7 mm (1.3 in)
2013	67.5 mm (2.7 in)
2014	77.5 mm (3.1 in)
2015	53.3 mm (2.1 in)
2016	24.4 mm (1.0 in)
2017	28.7 mm (1.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mesa, 1896 to 2017. The record is 154 days in 1924, marked on the chart; the median year is 81 days.

Longest dry spell (CDD) at Mesa by year
Year	Longest dry spell (CDD)
1896	57 days
1897	72 days
1898	85 days
1899	118 days
1900	74 days
1901	113 days
1902	119 days
1903	68 days
1904	118 days
1905	51 days
1906	88 days
1907	56 days
1908	80 days
1909	104 days
1910	91 days
1911	88 days
1912	62 days
1915	64 days
1916	80 days
1917	102 days
1918	53 days
1919	37 days
1920	61 days
1921	61 days
1922	86 days
1923	52 days
1924	154 days
1925	54 days
1926	61 days
1927	39 days
1928	151 days
1929	83 days
1930	48 days
1931	64 days
1932	48 days
1933	51 days
1934	53 days
1935	84 days
1936	97 days
1937	101 days
1938	124 days
1939	97 days
1940	104 days
1941	75 days
1942	81 days
1943	109 days
1944	73 days
1945	117 days
1946	79 days
1947	86 days
1948	79 days
1949	49 days
1950	87 days
1951	63 days
1952	47 days
1953	133 days
1954	67 days
1955	143 days
1956	133 days
1957	65 days
1958	78 days
1959	134 days
1960	142 days
1961	94 days
1962	99 days
1963	100 days
1964	76 days
1965	41 days
1966	116 days
1967	64 days
1968	116 days
1969	71 days
1970	128 days
1971	94 days
1972	151 days
1973	94 days
1974	107 days
1975	92 days
1976	78 days
1977	76 days
1978	80 days
1979	65 days
1980	87 days
1981	55 days
1982	62 days
1983	96 days
1984	91 days
1985	64 days
1986	38 days
1987	66 days
1988	95 days
1989	56 days
1990	42 days
1991	113 days
1992	47 days
1993	79 days
1994	53 days
1995	67 days
1996	113 days
1997	96 days
1998	51 days
1999	98 days
2000	78 days
2001	37 days
2002	98 days
2003	97 days
2004	93 days
2005	74 days
2006	105 days
2007	97 days
2008	91 days
2009	92 days
2010	108 days
2011	51 days
2012	55 days
2013	97 days
2014	128 days
2015	45 days
2016	124 days
2017	61 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

75 years with a frost

Across 75 years with a frost, the median last spring frost at Mesa falls on 26 February and the median first autumn frost on 26 November, which leaves a median of 271 days between them.

In 1951 to 1987 the median growing season was 296 days. That is 38 days more than in 1897 to 1933.

Fitted over all years, the growing season changes by +5.9 days per decade at this station.

Frost dates and growing season at Mesa
Measure	Median, all years	Earliest period (1897 to 1933)	Recent period (1951 to 1987)	Recent against earliest	Fitted trend
Last spring frost	26 February	6 March	8 February	26 days earlier	-4.0 days per decade
First autumn frost	26 November	15 November	3 December	18 days later	+1.9 days per decade
Growing days	271 days	258 days	296 days	38 days more	+5.9 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

117 years, 1897 to 2016

A day with at least 30.1 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 75.0 mm (3.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Mesa: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	30.1 mm (1.2 in)
5 years	41.3 mm (1.6 in)
10 years	49.1 mm (1.9 in)
25 years	59.2 mm (2.3 in)
50 years	67.0 mm (2.6 in)
100 years	75.0 mm (3.0 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 117 years of values from 1897 to 2016.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 70.6 mm (2.8 in) in 1906; 69.9 mm (2.8 in) in 2014; 66.8 mm (2.6 in) in 1951.

Station Changes

3 suspected

3 changes were suspected in the annual mean temperature of Mesa, at 1959, 1969 and 1981. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1959 ran 0.3 C (0.6 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1969 ran 0.2 C (0.4 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1981 ran 0.5 C (0.8 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Mesa, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1959	+0.3	+0.6	likely	5
1969	-0.2	-0.4	possible	5
1981	-0.5	-0.8	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Mesa standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mesa threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).