Ramos Arizpe (Smn) Weather Records (MXN00005032)

Record envelope, standing records and threshold days for Ramos Arizpe (Smn) (MXN00005032), Mexico, with 105 years of record.

Key Facts for Ramos Arizpe (Smn)

Ramos Arizpe (Smn) (MXN00005032) is a weather station in Mexico at 25.53 latitude and -100.98 longitude, 1,470 m (4,822 ft) above sea level.
The station reports from 1907 to 2011, 105 years of record.
1,464 records set at Ramos Arizpe (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Ramos Arizpe (Smn) set a daily record low maximum temperature of 5.6 C (42.1 F) on 25 December 2011.

About the Station

Location: Mexico, 25.53 latitude, -100.98 longitude.
Elevation: 1,470 m (4,822 ft).
Period of record: 1907 to 2011, 105 years.
Eligible elements: tmax, tmin, prcp.

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 Ramos Arizpe (Smn). 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 Ramos Arizpe (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.0 C (95.0 F)	-12.2 C (10.0 F)	n/a	n/a
Feb	37.8 C (100.0 F)	-12.2 C (10.0 F)	n/a	n/a
Mar	37.8 C (100.0 F)	-6.1 C (21.0 F)	n/a	n/a
Apr	41.7 C (107.1 F)	-3.3 C (26.1 F)	n/a	n/a
May	45.0 C (113.0 F)	3.3 C (37.9 F)	n/a	n/a
Jun	41.7 C (107.1 F)	6.7 C (44.1 F)	n/a	n/a
Jul	40.0 C (104.0 F)	8.9 C (48.0 F)	n/a	n/a
Aug	42.8 C (109.0 F)	7.8 C (46.0 F)	n/a	n/a
Sep	40.0 C (104.0 F)	3.3 C (37.9 F)	n/a	n/a
Oct	38.9 C (102.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	35.6 C (96.1 F)	-7.8 C (18.0 F)	n/a	n/a
Dec	35.6 C (96.1 F)	-10.0 C (14.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ramos Arizpe (Smn) still stand. 2011 holds the most, with 112.

Standing records at Ramos Arizpe (Smn) by the year they were set
Year set	Standing records
1907	1
1908	13
1909	15
1910	6
1911	22
1912	4
1927	20
1928	22
1929	29
1930	16
1931	19
1932	40
1933	23
1934	23
1935	19
1936	33
1937	28
1938	36
1939	32
1940	23
1941	9
1942	10
1943	5
1944	8
1945	12
1946	8
1947	19
1948	21
1949	13
1950	15
1951	15
1952	5
1953	15
1954	8
1955	15
1956	9
1957	12
1958	13
1959	12
1960	18
1961	13
1962	12
1963	13
1964	15
1965	18
1966	14
1967	16
1968	8
1969	13
1970	19
1971	19
1972	14
1973	20
1974	15
1975	17
1976	19
1977	8
1978	15
1979	8
1980	9
1981	10
1982	15
1983	20
1984	19
1985	10
1986	12
1987	15
1988	8
1989	11
1990	11
1991	23
1992	20
1993	18
1994	27
1995	8
2007	48
2008	50
2009	54
2010	22
2011	112

All-Time Record Progression

5 new records

5 all-time records were set at Ramos Arizpe (Smn) between 7 June 1984 and 29 May 2011. Each dot is a new record.

When Ramos Arizpe (Smn) set new all-time records
Date	Kind	Detail
1984-06-07	Record high minimum temperature	Record high minimum temperature 27.8 C (82.0 F)
1988-09-16	Record daily precipitation	Record daily precipitation 115.8 mm (4.6 in)
2007-06-08	Record high maximum temperature	Record high maximum temperature 41.7 C (107.1 F)
2011-05-28	Record high maximum temperature	Record high maximum temperature 43.9 C (111.0 F)
2011-05-29	Record high maximum temperature	Record high maximum temperature 45.0 C (113.0 F)

Wettest Day of Each Month

Sep: 115.8 mm (4.6 in)

The wettest day on record for each calendar month at Ramos Arizpe (Smn). The most was 115.8 mm (4.6 in) on 16 September 1988.

Record daily precipitation for each month at Ramos Arizpe (Smn)
Month	Record daily precipitation (mm)	Date
Jan	29.0 mm (1.1 in)	8 January 1992
Feb	33.8 mm (1.3 in)	5 February 1933
Mar	39.9 mm (1.6 in)	12 March 1974
Apr	35.8 mm (1.4 in)	24 April 1911
May	49.3 mm (1.9 in)	10 May 1934
Jun	43.9 mm (1.7 in)	24 June 1938
Jul	49.8 mm (2.0 in)	20 July 1988
Aug	97.0 mm (3.8 in)	27 August 1909
Sep	115.8 mm (4.6 in)	16 September 1988
Oct	31.0 mm (1.2 in)	26 October 1959
Nov	39.9 mm (1.6 in)	16 November 1976
Dec	39.9 mm (1.6 in)	4 December 1937

Period of Record Coverage

1926 to 2011

75 years of record at Ramos Arizpe (Smn), 1926 to 2011. 6 years have data for under 90 percent of days and are left out of rankings: 1926, 1927, 1989, 1995, 2009, 2010.

Days with data per year at Ramos Arizpe (Smn)
Year	Days with data	Share of year	Complete
1926	3	1%	No
1927	224	61%	No
1928	366	100%	Yes
1929	365	100%	Yes
1930	365	100%	Yes
1931	365	100%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	365	100%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	365	100%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	363	99%	Yes
1944	365	100%	Yes
1945	363	99%	Yes
1946	364	100%	Yes
1947	361	99%	Yes
1948	366	100%	Yes
1949	362	99%	Yes
1950	365	100%	Yes
1951	361	99%	Yes
1952	366	100%	Yes
1953	361	99%	Yes
1954	365	100%	Yes
1955	362	99%	Yes
1956	366	100%	Yes
1957	363	99%	Yes
1958	359	98%	Yes
1959	361	99%	Yes
1960	363	99%	Yes
1961	362	99%	Yes
1962	362	99%	Yes
1963	359	98%	Yes
1964	364	99%	Yes
1965	363	99%	Yes
1966	359	98%	Yes
1967	362	99%	Yes
1968	364	99%	Yes
1969	355	97%	Yes
1970	361	99%	Yes
1971	363	99%	Yes
1972	363	99%	Yes
1973	360	99%	Yes
1974	361	99%	Yes
1975	360	99%	Yes
1976	358	98%	Yes
1977	364	100%	Yes
1978	360	99%	Yes
1979	361	99%	Yes
1980	357	98%	Yes
1981	361	99%	Yes
1982	356	98%	Yes
1983	360	99%	Yes
1984	359	98%	Yes
1985	360	99%	Yes
1986	364	100%	Yes
1987	361	99%	Yes
1988	364	99%	Yes
1989	270	74%	No
1990	361	99%	Yes
1991	358	98%	Yes
1992	360	98%	Yes
1993	362	99%	Yes
1994	365	100%	Yes
1995	212	58%	No
2007	352	96%	Yes
2008	352	96%	Yes
2009	293	80%	No
2010	322	88%	No
2011	338	93%	Yes

Latest Records

Latest records at Ramos Arizpe (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 December 2011	Ramos Arizpe (Smn), MX	daily low max	5.6 C (42.1 F)	1.1 C (2.0 F)	64 years	28 of 100 (Routine)
23 December 2011	Ramos Arizpe (Smn), MX	daily high max (Tie)	33.9 C (93.0 F)	tie	0 years	2 of 100 (Routine)
18 December 2011	Ramos Arizpe (Smn), MX	daily low max (Tie)	10.0 C (50.0 F)	tie	76 years	7 of 100 (Routine)
9 December 2011	Ramos Arizpe (Smn), MX	daily low min (Tie)	-2.2 C (28.0 F)	tie	56 years	6 of 100 (Routine)
4 December 2011	Ramos Arizpe (Smn), MX	daily high max	32.8 C (91.0 F)	3.9 C (7.0 F)	77 years	37 of 100 (Notable)
2 December 2011	Ramos Arizpe (Smn), MX	daily high max (Tie)	30.6 C (87.1 F)	tie	0 years	2 of 100 (Routine)
26 November 2011	Ramos Arizpe (Smn), MX	daily high max	33.9 C (93.0 F)	2.2 C (4.0 F)	40 years	24 of 100 (Routine)
23 November 2011	Ramos Arizpe (Smn), MX	daily high max	35.0 C (95.0 F)	2.2 C (4.0 F)	4 years	13 of 100 (Routine)
22 November 2011	Ramos Arizpe (Smn), MX	daily high max	35.0 C (95.0 F)	3.3 C (5.9 F)	4 years	15 of 100 (Routine)
21 November 2011	Ramos Arizpe (Smn), MX	daily high max	33.9 C (93.0 F)	3.3 C (5.9 F)	72 years	35 of 100 (Notable)
20 November 2011	Ramos Arizpe (Smn), MX	daily high max (Tie)	31.7 C (89.1 F)	tie	54 years	6 of 100 (Routine)
20 November 2011	Ramos Arizpe (Smn), MX	daily high min (Tie)	12.8 C (55.0 F)	tie	24 years	4 of 100 (Routine)
19 November 2011	Ramos Arizpe (Smn), MX	daily high max (Tie)	30.0 C (86.0 F)	tie	54 years	6 of 100 (Routine)
15 November 2011	Ramos Arizpe (Smn), MX	daily high max	33.9 C (93.0 F)	2.2 C (4.0 F)	56 years	28 of 100 (Routine)
14 November 2011	Ramos Arizpe (Smn), MX	daily high max	33.9 C (93.0 F)	2.2 C (4.0 F)	56 years	28 of 100 (Routine)
13 November 2011	Ramos Arizpe (Smn), MX	daily high max (Tie)	31.7 C (89.1 F)	tie	56 years	6 of 100 (Routine)
10 November 2011	Ramos Arizpe (Smn), MX	daily high max	33.9 C (93.0 F)	2.2 C (4.0 F)	72 years	33 of 100 (Routine)
9 November 2011	Ramos Arizpe (Smn), MX	daily high max	33.9 C (93.0 F)	2.8 C (5.0 F)	84 years	38 of 100 (Notable)
8 November 2011	Ramos Arizpe (Smn), MX	daily high max	32.8 C (91.0 F)	1.1 C (2.0 F)	84 years	35 of 100 (Notable)
7 November 2011	Ramos Arizpe (Smn), MX	daily high max	32.8 C (91.0 F)	1.1 C (2.0 F)	73 years	32 of 100 (Routine)

Climate Trend

68 complete years, 1928 to 2008

One stripe for each of 68 complete years at Ramos Arizpe (Smn), 1928 to 2008. Blue stripes are years cooler than the station's own mean of 18.0 C (64.4 F); red stripes are warmer. The coolest year was 1940, at 16.3 C (61.3 F), and the warmest was 2008, at 20.2 C (68.4 F). The strongest colour marks a difference of 2.3 C (4.1 F).

Annual mean temperature at Ramos Arizpe (Smn) as warming stripes, 1928 to 2008
Year	Annual mean temperature	Difference from the station mean
1928	18.7 C	+0.68 C
1929	17.9 C	-0.10 C
1930	17.4 C	-0.62 C
1931	16.9 C	-1.12 C
1932	18.1 C	+0.08 C
1933	18.6 C	+0.62 C
1934	17.6 C	-0.40 C
1935	17.6 C	-0.39 C
1936	17.1 C	-0.89 C
1937	17.5 C	-0.46 C
1938	17.7 C	-0.30 C
1939	16.9 C	-1.11 C
1940	16.3 C	-1.69 C
1941	16.9 C	-1.05 C
1942	16.9 C	-1.09 C
1943	17.2 C	-0.80 C
1944	17.4 C	-0.58 C
1945	18.5 C	+0.50 C
1946	17.8 C	-0.20 C
1947	17.0 C	-0.98 C
1948	17.8 C	-0.15 C
1949	18.2 C	+0.21 C
1950	18.9 C	+0.95 C
1951	18.3 C	+0.31 C
1952	17.5 C	-0.47 C
1953	18.1 C	+0.15 C
1954	18.4 C	+0.37 C
1955	18.3 C	+0.35 C
1956	18.4 C	+0.40 C
1957	18.7 C	+0.75 C
1958	17.8 C	-0.21 C
1959	17.8 C	-0.20 C
1960	18.2 C	+0.22 C
1961	18.1 C	+0.08 C
1962	18.9 C	+0.89 C
1963	18.4 C	+0.41 C
1964	18.6 C	+0.63 C
1965	18.6 C	+0.65 C
1966	17.4 C	-0.56 C
1967	18.2 C	+0.23 C
1968	17.3 C	-0.66 C
1969	18.0 C	-0.01 C
1970	17.5 C	-0.45 C
1971	18.3 C	+0.36 C
1972	18.3 C	+0.28 C
1973	17.5 C	-0.49 C
1974	18.1 C	+0.14 C
1975	18.0 C	+0.01 C
1976	16.7 C	-1.25 C
1977	18.1 C	+0.12 C
1978	17.9 C	-0.12 C
1979	17.8 C	-0.22 C
1980	18.3 C	+0.34 C
1981	17.6 C	-0.37 C
1982	18.4 C	+0.38 C
1983	17.8 C	-0.21 C
1984	18.0 C	+0.06 C
1985	18.3 C	+0.33 C
1986	18.3 C	+0.27 C
1987	17.3 C	-0.71 C
1988	17.7 C	-0.31 C
1990	18.5 C	+0.52 C
1991	18.5 C	+0.54 C
1992	18.0 C	+0.06 C
1993	18.5 C	+0.48 C
1994	19.7 C	+1.68 C
2007	19.9 C	+1.96 C
2008	20.2 C	+2.22 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1928 to 2008. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 68 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Ramos Arizpe (Smn)
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	1928 to 2008	68	Rise
Mean daily maximum	-0.18 C (-0.35 to -0.01) per decade	-0.32 F (-0.63 to -0.01) per decade	1928 to 2008	68	Fall
Mean daily minimum	0.5 C (0.4 to 0.6) per decade	0.9 F (0.7 to 1.1) per decade	1928 to 2008	68	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

1907 to 2011

Yearly extremes at Ramos Arizpe (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.0 C (113.0 F)	2011	35.6 C (96.1 F)	75
Coldest night (TNn)	-12.2 C (10.0 F)	1949	-5.0 C (23.0 F)	82
Wettest day (Rx1day)	115.8 mm (4.6 in)	1988	29.0 mm (1.1 in)	79
Wettest five days (Rx5day)	124.7 mm (4.9 in)	1909	43.7 mm (1.7 in)	79
Longest dry spell (CDD)	147 days	1909	64 days	79

Hottest day (TXx)

The hottest day of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is 45.0 C (113.0 F) in 2011, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Ramos Arizpe (Smn) by year
Year	Hottest day (TXx)
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1926	25.6 C (78.1 F)
1927	36.1 C (97.0 F)
1928	40.0 C (104.0 F)
1929	38.9 C (102.0 F)
1930	37.8 C (100.0 F)
1931	35.6 C (96.1 F)
1932	40.0 C (104.0 F)
1933	37.8 C (100.0 F)
1934	35.6 C (96.1 F)
1935	36.1 C (97.0 F)
1936	36.7 C (98.1 F)
1937	37.8 C (100.0 F)
1938	36.1 C (97.0 F)
1939	36.7 C (98.1 F)
1940	35.0 C (95.0 F)
1941	35.0 C (95.0 F)
1942	36.7 C (98.1 F)
1943	35.0 C (95.0 F)
1944	33.9 C (93.0 F)
1945	33.9 C (93.0 F)
1946	32.8 C (91.0 F)
1947	35.6 C (96.1 F)
1948	35.0 C (95.0 F)
1949	35.0 C (95.0 F)
1950	36.7 C (98.1 F)
1951	35.6 C (96.1 F)
1952	35.6 C (96.1 F)
1953	35.6 C (96.1 F)
1954	35.6 C (96.1 F)
1955	35.6 C (96.1 F)
1956	35.0 C (95.0 F)
1957	39.4 C (102.9 F)
1958	36.7 C (98.1 F)
1959	33.9 C (93.0 F)
1960	37.8 C (100.0 F)
1961	38.9 C (102.0 F)
1962	36.7 C (98.1 F)
1963	35.6 C (96.1 F)
1964	36.7 C (98.1 F)
1965	35.6 C (96.1 F)
1966	36.7 C (98.1 F)
1967	36.7 C (98.1 F)
1968	33.9 C (93.0 F)
1969	33.9 C (93.0 F)
1970	35.0 C (95.0 F)
1971	35.0 C (95.0 F)
1972	32.8 C (91.0 F)
1973	33.9 C (93.0 F)
1974	35.0 C (95.0 F)
1975	33.9 C (93.0 F)
1976	31.7 C (89.1 F)
1977	33.9 C (93.0 F)
1978	33.9 C (93.0 F)
1979	33.9 C (93.0 F)
1980	33.9 C (93.0 F)
1981	36.7 C (98.1 F)
1982	35.0 C (95.0 F)
1983	36.7 C (98.1 F)
1984	35.0 C (95.0 F)
1985	35.0 C (95.0 F)
1986	35.6 C (96.1 F)
1987	35.0 C (95.0 F)
1988	32.8 C (91.0 F)
1989	33.9 C (93.0 F)
1990	35.6 C (96.1 F)
1991	35.0 C (95.0 F)
1992	35.0 C (95.0 F)
1993	37.8 C (100.0 F)
1994	37.8 C (100.0 F)
1995	38.9 C (102.0 F)
2007	41.7 C (107.1 F)
2008	40.6 C (105.1 F)
2009	40.6 C (105.1 F)
2010	40.6 C (105.1 F)
2011	45.0 C (113.0 F)

Coldest night (TNn)

The coldest night of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is -12.2 C (10.0 F) in 1949, marked on the chart; the median year is -5.0 C (23.0 F).

Coldest night (TNn) at Ramos Arizpe (Smn) by year
Year	Coldest night (TNn)
1907	-2.8 C (27.0 F)
1908	-7.8 C (18.0 F)
1909	-5.0 C (23.0 F)
1910	-5.0 C (23.0 F)
1911	-8.3 C (17.1 F)
1912	-5.0 C (23.0 F)
1913	1.7 C (35.1 F)
1926	-5.0 C (23.0 F)
1927	-4.4 C (24.1 F)
1928	-6.1 C (21.0 F)
1929	-7.2 C (19.0 F)
1930	-7.2 C (19.0 F)
1931	-4.4 C (24.1 F)
1932	-6.1 C (21.0 F)
1933	-6.1 C (21.0 F)
1934	-5.6 C (21.9 F)
1935	-6.1 C (21.0 F)
1936	-6.7 C (19.9 F)
1937	-5.0 C (23.0 F)
1938	-7.2 C (19.0 F)
1939	-5.0 C (23.0 F)
1940	-9.4 C (15.1 F)
1941	-5.0 C (23.0 F)
1942	-4.4 C (24.1 F)
1943	-7.2 C (19.0 F)
1944	-5.0 C (23.0 F)
1945	-1.7 C (28.9 F)
1946	-3.3 C (26.1 F)
1947	-8.3 C (17.1 F)
1948	-7.2 C (19.0 F)
1949	-12.2 C (10.0 F)
1950	-2.8 C (27.0 F)
1951	-10.0 C (14.0 F)
1952	-2.2 C (28.0 F)
1953	-7.2 C (19.0 F)
1954	-2.2 C (28.0 F)
1955	-6.1 C (21.0 F)
1956	-5.0 C (23.0 F)
1957	-6.1 C (21.0 F)
1958	-2.2 C (28.0 F)
1959	-3.3 C (26.1 F)
1960	-5.0 C (23.0 F)
1961	-2.2 C (28.0 F)
1962	-9.4 C (15.1 F)
1963	-9.4 C (15.1 F)
1964	-8.3 C (17.1 F)
1965	-6.1 C (21.0 F)
1966	-6.1 C (21.0 F)
1967	-6.1 C (21.0 F)
1968	-2.2 C (28.0 F)
1969	-2.2 C (28.0 F)
1970	-4.4 C (24.1 F)
1971	-8.3 C (17.1 F)
1972	-4.4 C (24.1 F)
1973	-5.0 C (23.0 F)
1974	-3.3 C (26.1 F)
1975	-5.0 C (23.0 F)
1976	-5.0 C (23.0 F)
1977	-4.4 C (24.1 F)
1978	-5.0 C (23.0 F)
1979	-6.1 C (21.0 F)
1980	-4.4 C (24.1 F)
1981	-4.4 C (24.1 F)
1982	-3.3 C (26.1 F)
1983	-10.0 C (14.0 F)
1984	-4.4 C (24.1 F)
1985	-7.2 C (19.0 F)
1986	-3.3 C (26.1 F)
1987	-2.2 C (28.0 F)
1988	-3.3 C (26.1 F)
1989	-7.2 C (19.0 F)
1990	-4.4 C (24.1 F)
1991	-1.1 C (30.0 F)
1992	-2.2 C (28.0 F)
1993	-0.6 C (30.9 F)
1994	0.0 C (32.0 F)
1995	-1.1 C (30.0 F)
2007	-4.4 C (24.1 F)
2008	-7.2 C (19.0 F)
2009	-2.2 C (28.0 F)
2010	-7.2 C (19.0 F)
2011	-12.2 C (10.0 F)

Wettest day (Rx1day)

The wettest day of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is 115.8 mm (4.6 in) in 1988, marked on the chart; the median year is 29.0 mm (1.1 in).

Wettest day (Rx1day) at Ramos Arizpe (Smn) by year
Year	Wettest day (Rx1day)
1907	29.7 mm (1.2 in)
1908	22.1 mm (0.9 in)
1909	97.0 mm (3.8 in)
1910	73.7 mm (2.9 in)
1911	49.8 mm (2.0 in)
1912	9.7 mm (0.38 in)
1913	7.4 mm (0.29 in)
1926	0.3 mm (0.01 in)
1927	21.8 mm (0.9 in)
1928	31.8 mm (1.3 in)
1929	15.0 mm (0.6 in)
1930	21.8 mm (0.9 in)
1931	37.8 mm (1.5 in)
1932	29.0 mm (1.1 in)
1933	89.9 mm (3.5 in)
1934	49.3 mm (1.9 in)
1935	27.9 mm (1.1 in)
1936	26.9 mm (1.1 in)
1937	39.9 mm (1.6 in)
1938	68.8 mm (2.7 in)
1939	39.9 mm (1.6 in)
1940	77.0 mm (3.0 in)
1941	20.8 mm (0.8 in)
1942	33.8 mm (1.3 in)
1943	29.5 mm (1.2 in)
1944	21.8 mm (0.9 in)
1945	20.8 mm (0.8 in)
1946	38.9 mm (1.5 in)
1947	34.8 mm (1.4 in)
1948	57.9 mm (2.3 in)
1949	29.5 mm (1.2 in)
1950	23.4 mm (0.9 in)
1951	64.3 mm (2.5 in)
1952	43.7 mm (1.7 in)
1953	20.8 mm (0.8 in)
1954	26.9 mm (1.1 in)
1955	21.8 mm (0.9 in)
1956	17.3 mm (0.7 in)
1957	17.3 mm (0.7 in)
1958	38.4 mm (1.5 in)
1959	37.8 mm (1.5 in)
1960	38.9 mm (1.5 in)
1961	80.8 mm (3.2 in)
1962	19.8 mm (0.8 in)
1963	48.8 mm (1.9 in)
1964	23.4 mm (0.9 in)
1965	25.9 mm (1.0 in)
1966	42.9 mm (1.7 in)
1967	61.0 mm (2.4 in)
1968	19.8 mm (0.8 in)
1969	20.8 mm (0.8 in)
1970	25.9 mm (1.0 in)
1971	31.0 mm (1.2 in)
1972	27.9 mm (1.1 in)
1973	31.0 mm (1.2 in)
1974	39.9 mm (1.6 in)
1975	21.8 mm (0.9 in)
1976	39.9 mm (1.6 in)
1977	35.8 mm (1.4 in)
1978	54.9 mm (2.2 in)
1979	27.9 mm (1.1 in)
1980	15.0 mm (0.6 in)
1981	35.8 mm (1.4 in)
1982	18.8 mm (0.7 in)
1983	31.8 mm (1.3 in)
1984	19.8 mm (0.8 in)
1985	39.9 mm (1.6 in)
1986	19.8 mm (0.8 in)
1987	26.9 mm (1.1 in)
1988	115.8 mm (4.6 in)
1989	33.8 mm (1.3 in)
1990	34.8 mm (1.4 in)
1991	23.9 mm (0.9 in)
1992	29.0 mm (1.1 in)
1993	21.8 mm (0.9 in)
1994	14.0 mm (0.6 in)
1995	3.8 mm (0.15 in)
2007	n/a
2008	n/a
2009	21.8 mm (0.9 in)
2010	21.8 mm (0.9 in)
2011	n/a

Wettest five days (Rx5day)

The wettest five days of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is 124.7 mm (4.9 in) in 1909, marked on the chart; the median year is 43.7 mm (1.7 in).

Wettest five days (Rx5day) at Ramos Arizpe (Smn) by year
Year	Wettest five days (Rx5day)
1907	33.8 mm (1.3 in)
1908	33.5 mm (1.3 in)
1909	124.7 mm (4.9 in)
1910	98.6 mm (3.9 in)
1911	50.6 mm (2.0 in)
1912	22.6 mm (0.9 in)
1913	12.2 mm (0.5 in)
1926	0.3 mm (0.01 in)
1927	23.6 mm (0.9 in)
1928	46.7 mm (1.8 in)
1929	23.9 mm (0.9 in)
1930	48.6 mm (1.9 in)
1931	48.6 mm (1.9 in)
1932	42.0 mm (1.7 in)
1933	108.2 mm (4.3 in)
1934	76.5 mm (3.0 in)
1935	46.2 mm (1.8 in)
1936	38.2 mm (1.5 in)
1937	41.6 mm (1.6 in)
1938	70.1 mm (2.8 in)
1939	59.7 mm (2.4 in)
1940	85.4 mm (3.4 in)
1941	39.6 mm (1.6 in)
1942	49.3 mm (1.9 in)
1943	33.3 mm (1.3 in)
1944	22.9 mm (0.9 in)
1945	35.1 mm (1.4 in)
1946	40.7 mm (1.6 in)
1947	66.8 mm (2.6 in)
1948	111.5 mm (4.4 in)
1949	37.4 mm (1.5 in)
1950	29.0 mm (1.1 in)
1951	105.4 mm (4.1 in)
1952	43.7 mm (1.7 in)
1953	54.4 mm (2.1 in)
1954	49.1 mm (1.9 in)
1955	27.4 mm (1.1 in)
1956	17.3 mm (0.7 in)
1957	23.6 mm (0.9 in)
1958	68.8 mm (2.7 in)
1959	51.3 mm (2.0 in)
1960	61.9 mm (2.4 in)
1961	85.4 mm (3.4 in)
1962	24.2 mm (1.0 in)
1963	51.6 mm (2.0 in)
1964	38.4 mm (1.5 in)
1965	25.9 mm (1.0 in)
1966	42.9 mm (1.7 in)
1967	107.7 mm (4.2 in)
1968	46.3 mm (1.8 in)
1969	34.8 mm (1.4 in)
1970	40.7 mm (1.6 in)
1971	64.5 mm (2.5 in)
1972	55.2 mm (2.2 in)
1973	48.4 mm (1.9 in)
1974	51.8 mm (2.0 in)
1975	43.6 mm (1.7 in)
1976	62.5 mm (2.5 in)
1977	48.5 mm (1.9 in)
1978	57.5 mm (2.3 in)
1979	42.6 mm (1.7 in)
1980	22.6 mm (0.9 in)
1981	61.4 mm (2.4 in)
1982	33.6 mm (1.3 in)
1983	46.9 mm (1.8 in)
1984	26.4 mm (1.0 in)
1985	55.7 mm (2.2 in)
1986	37.5 mm (1.5 in)
1987	37.6 mm (1.5 in)
1988	122.4 mm (4.8 in)
1989	48.5 mm (1.9 in)
1990	55.4 mm (2.2 in)
1991	33.6 mm (1.3 in)
1992	50.3 mm (2.0 in)
1993	33.2 mm (1.3 in)
1994	22.9 mm (0.9 in)
1995	7.6 mm (0.30 in)
2007	n/a
2008	n/a
2009	21.8 mm (0.9 in)
2010	21.8 mm (0.9 in)
2011	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Ramos Arizpe (Smn), 1907 to 2011. The record is 147 days in 1909, marked on the chart; the median year is 64 days.

Longest dry spell (CDD) at Ramos Arizpe (Smn) by year
Year	Longest dry spell (CDD)
1907	26 days
1908	79 days
1909	147 days
1910	88 days
1911	104 days
1912	100 days
1913	23 days
1926	31 days
1927	89 days
1928	50 days
1929	106 days
1930	49 days
1931	48 days
1932	56 days
1933	55 days
1934	69 days
1935	76 days
1936	71 days
1937	79 days
1938	70 days
1939	47 days
1940	89 days
1941	42 days
1942	72 days
1943	78 days
1944	52 days
1945	69 days
1946	45 days
1947	92 days
1948	68 days
1949	61 days
1950	60 days
1951	76 days
1952	94 days
1953	51 days
1954	64 days
1955	81 days
1956	110 days
1957	51 days
1958	39 days
1959	44 days
1960	52 days
1961	44 days
1962	63 days
1963	48 days
1964	52 days
1965	69 days
1966	69 days
1967	45 days
1968	51 days
1969	51 days
1970	96 days
1971	85 days
1972	45 days
1973	77 days
1974	81 days
1975	102 days
1976	78 days
1977	120 days
1978	57 days
1979	58 days
1980	68 days
1981	62 days
1982	55 days
1983	81 days
1984	105 days
1985	76 days
1986	64 days
1987	60 days
1988	64 days
1989	72 days
1990	74 days
1991	53 days
1992	41 days
1993	56 days
1994	72 days
1995	97 days
2007	n/a
2008	n/a
2009	21 days
2010	21 days
2011	n/a

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

64 years with a frost

Across 64 years with a frost, the median last spring frost at Ramos Arizpe (Smn) falls on 10 March and the median first autumn frost on 28 November, which leaves a median of 263 days between them.

In 1962 to 2008 the median growing season was 275 days. That is 27 days more than in 1928 to 1957.

Fitted over all years, the growing season changes by +7.5 days per decade at this station.

Frost dates and growing season at Ramos Arizpe (Smn)
Measure	Median, all years	Earliest period (1928 to 1957)	Recent period (1962 to 2008)	Recent against earliest	Fitted trend
Last spring frost	10 March	16 March	28 February	16 days earlier	-4.9 days per decade
First autumn frost	28 November	22 November	6 December	14 days later	+2.5 days per decade
Growing days	263 days	248 days	275 days	27 days more	+7.5 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

71 years, 1908 to 1994

A day with at least 30.4 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 123.3 mm (4.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Ramos Arizpe (Smn): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	30.4 mm (1.2 in)
5 years	46.5 mm (1.8 in)
10 years	60.0 mm (2.4 in)
25 years	81.2 mm (3.2 in)
50 years	100.4 mm (4.0 in)
100 years	123.3 mm (4.9 in)	Longer than the 71 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 71 years of values from 1908 to 1994.

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: 115.8 mm (4.6 in) in 1988; 97.0 mm (3.8 in) in 1909; 89.9 mm (3.5 in) in 1933.

Download the Data

Data for Ramos Arizpe (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ramos Arizpe (Smn) 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).