Lees Ferry Weather Records (USC00024849)

Record envelope, standing records and threshold days for Lees Ferry (USC00024849), Arizona, United States, with 97 years of record.

Key Facts for Lees Ferry

Lees Ferry (USC00024849) is a weather station in Arizona, United States at 36.86 latitude and -111.60 longitude, 978 m (3,210 ft) above sea level.
The station reports from 1916 to 2012, 97 years of record.
1,464 records set at Lees Ferry still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lees Ferry set a daily record precipitation of 3.8 mm (0.15 in) on 3 December 2011.

About the Station

Location: Arizona, United States, 36.86 latitude, -111.60 longitude.
Elevation: 978 m (3,210 ft).
Period of record: 1916 to 2012, 97 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 Lees Ferry. 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 Lees Ferry, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	22.8 C (73.0 F)	-16.1 C (3.0 F)	n/a	n/a
Feb	27.8 C (82.0 F)	-14.4 C (6.1 F)	n/a	n/a
Mar	32.8 C (91.0 F)	-6.1 C (21.0 F)	n/a	n/a
Apr	37.2 C (99.0 F)	-4.4 C (24.1 F)	n/a	n/a
May	43.9 C (111.0 F)	1.1 C (34.0 F)	n/a	n/a
Jun	46.7 C (116.1 F)	3.9 C (39.0 F)	n/a	n/a
Jul	48.3 C (118.9 F)	12.2 C (54.0 F)	n/a	n/a
Aug	45.6 C (114.1 F)	11.1 C (52.0 F)	n/a	n/a
Sep	43.3 C (109.9 F)	5.6 C (42.1 F)	n/a	n/a
Oct	37.2 C (99.0 F)	-1.7 C (28.9 F)	n/a	n/a
Nov	28.9 C (84.0 F)	-8.9 C (16.0 F)	n/a	n/a
Dec	23.9 C (75.0 F)	-16.7 C (1.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Lees Ferry still stand. 1950 holds the most, with 38.

Standing records at Lees Ferry by the year they were set
Year set	Standing records
1921	5
1922	27
1923	17
1924	17
1925	28
1926	7
1927	20
1928	10
1929	28
1930	19
1931	36
1932	15
1933	37
1934	29
1935	22
1936	17
1937	27
1938	1
1943	5
1944	8
1945	26
1946	6
1947	22
1948	15
1949	27
1950	38
1951	15
1952	8
1953	11
1954	14
1955	34
1956	23
1957	16
1958	18
1959	15
1960	12
1961	15
1962	24
1963	14
1964	7
1965	21
1966	10
1967	19
1968	14
1969	14
1970	25
1971	24
1972	21
1973	8
1974	11
1975	22
1976	10
1977	18
1978	14
1979	16
1980	14
1981	18
1982	8
1983	4
1984	23
1985	22
1986	33
1987	6
1988	13
1989	36
1990	23
1991	6
1992	8
1993	4
1994	16
1995	11
1999	28
2000	27
2001	15
2002	30
2003	18
2004	12
2005	11
2006	25
2007	12
2008	15
2009	11
2010	16
2011	17

All-Time Record Progression

4 new records

4 all-time records were set at Lees Ferry between 14 December 1967 and 13 July 2005. Each dot is a new record.

When Lees Ferry set new all-time records
Date	Kind	Detail
1967-12-14	Record snow depth	Record snow depth 20.3 cm (8.0 in)
1990-06-26	Record high maximum temperature	Record high maximum temperature 46.7 C (116.1 F)
2002-07-09	Record high maximum temperature	Record high maximum temperature 47.2 C (117.0 F)
2005-07-13	Record high maximum temperature	Record high maximum temperature 48.3 C (118.9 F)

Wettest Day of Each Month

Aug: 52.3 mm (2.1 in)

The wettest day on record for each calendar month at Lees Ferry. The most was 52.3 mm (2.1 in) on 28 August 1934.

Record daily precipitation for each month at Lees Ferry
Month	Record daily precipitation (mm)	Date
Jan	27.9 mm (1.1 in)	22 January 2010
Feb	35.6 mm (1.4 in)	23 February 1948
Mar	38.1 mm (1.5 in)	21 March 2000
Apr	37.8 mm (1.5 in)	30 April 1980
May	27.2 mm (1.1 in)	29 May 1934
Jun	19.6 mm (0.8 in)	10 June 1957
Jul	39.6 mm (1.6 in)	15 July 1953
Aug	52.3 mm (2.1 in)	28 August 1934
Sep	45.7 mm (1.8 in)	8 September 2002
Oct	35.6 mm (1.4 in)	6 October 1946
Nov	22.4 mm (0.9 in)	27 November 1919
Dec	20.3 mm (0.8 in)	26 December 1979

Period of Record Coverage

1921 to 2012

85 years of record at Lees Ferry, 1921 to 2012. 26 years have data for under 90 percent of days and are left out of rankings: 1921, 1925, 1937, 1938, 1943, 1944, 1955, 1959 and others.

Days with data per year at Lees Ferry
Year	Days with data	Share of year	Complete
1921	102	28%	No
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	301	82%	No
1926	363	99%	Yes
1927	348	95%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	364	100%	Yes
1931	365	100%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	364	100%	Yes
1935	363	99%	Yes
1936	363	99%	Yes
1937	284	78%	No
1938	94	26%	No
1943	194	53%	No
1944	324	89%	No
1945	348	95%	Yes
1946	337	92%	Yes
1947	329	90%	Yes
1948	358	98%	Yes
1949	364	100%	Yes
1950	364	100%	Yes
1951	359	98%	Yes
1952	366	100%	Yes
1953	347	95%	Yes
1954	340	93%	Yes
1955	326	89%	No
1956	342	93%	Yes
1957	331	91%	Yes
1958	332	91%	Yes
1959	328	90%	No
1960	327	89%	No
1961	312	85%	No
1962	283	78%	No
1963	331	91%	Yes
1964	202	55%	No
1965	265	73%	No
1966	365	100%	Yes
1967	357	98%	Yes
1968	365	100%	Yes
1969	364	100%	Yes
1970	361	99%	Yes
1971	352	96%	Yes
1972	348	95%	Yes
1973	358	98%	Yes
1974	344	94%	Yes
1975	333	91%	Yes
1976	358	98%	Yes
1977	347	95%	Yes
1978	340	93%	Yes
1979	348	95%	Yes
1980	334	91%	Yes
1981	322	88%	No
1982	338	93%	Yes
1983	313	86%	No
1984	297	81%	No
1985	336	92%	Yes
1986	331	91%	Yes
1987	301	82%	No
1988	339	93%	Yes
1989	318	87%	No
1990	293	80%	No
1991	235	64%	No
1992	227	62%	No
1993	245	67%	No
1994	350	96%	Yes
1995	98	27%	No
1999	357	98%	Yes
2000	361	99%	Yes
2001	362	99%	Yes
2002	365	100%	Yes
2003	353	97%	Yes
2004	340	93%	Yes
2005	243	67%	No
2006	356	98%	Yes
2007	364	100%	Yes
2008	356	97%	Yes
2009	280	77%	No
2010	352	96%	Yes
2011	365	100%	Yes
2012	24	7%	No

Latest Records

Latest records at Lees Ferry
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
3 December 2011	Lees Ferry, US	daily rain	3.8 mm (0.15 in)	0.8 mm (0.03 in)	44 years	20 of 100 (Routine)
8 November 2011	Lees Ferry, US	daily low max	10.6 C (51.1 F)	2.2 C (4.0 F)	81 years	37 of 100 (Notable)
7 November 2011	Lees Ferry, US	daily low max	6.1 C (43.0 F)	3.9 C (7.0 F)	20 years	23 of 100 (Routine)
27 October 2011	Lees Ferry, US	daily low max (Tie)	15.0 C (59.0 F)	tie	26 years	4 of 100 (Routine)
17 October 2011	Lees Ferry, US	daily high min	18.3 C (64.9 F)	2.7 C (4.9 F)	5 years	17 of 100 (Routine)
7 October 2011	Lees Ferry, US	daily low max	17.8 C (64.0 F)	3.3 C (5.9 F)	64 years	34 of 100 (Routine)
6 October 2011	Lees Ferry, US	daily low max	16.7 C (62.1 F)	0.5 C (0.9 F)	0 years	10 of 100 (Routine)
2 October 2011	Lees Ferry, US	monthly high min	21.1 C (70.0 F)	0.5 C (0.9 F)	61 years	38 of 100 (Notable)
26 September 2011	Lees Ferry, US	daily high min	21.1 C (70.0 F)	1.1 C (2.0 F)	8 years	14 of 100 (Routine)
14 September 2011	Lees Ferry, US	daily rain	10.4 mm (0.4 in)	1.8 mm (0.07 in)	36 years	20 of 100 (Routine)
5 September 2011	Lees Ferry, US	daily high min	25.6 C (78.1 F)	1.2 C (2.2 F)	4 years	13 of 100 (Routine)
28 August 2011	Lees Ferry, US	daily high min	26.1 C (79.0 F)	1.7 C (3.1 F)	84 years	39 of 100 (Notable)
26 August 2011	Lees Ferry, US	daily high min (Tie)	26.7 C (80.1 F)	tie	74 years	7 of 100 (Routine)
25 August 2011	Lees Ferry, US	daily high min	27.2 C (81.0 F)	1.1 C (2.0 F)	22 years	18 of 100 (Routine)
24 August 2011	Lees Ferry, US	daily high max	41.7 C (107.1 F)	0.6 C (1.1 F)	80 years	34 of 100 (Routine)
26 July 2011	Lees Ferry, US	daily low max	30.6 C (87.1 F)	1.6 C (2.9 F)	9 years	16 of 100 (Routine)
15 July 2011	Lees Ferry, US	daily low min (Tie)	17.8 C (64.0 F)	tie	36 years	4 of 100 (Routine)
19 May 2011	Lees Ferry, US	daily low max	19.4 C (66.9 F)	4.5 C (8.1 F)	33 years	28 of 100 (Routine)
18 May 2011	Lees Ferry, US	daily low max (Tie)	20.0 C (68.0 F)	tie	80 years	8 of 100 (Routine)
29 April 2011	Lees Ferry, US	daily low max (Tie)	16.1 C (61.0 F)	tie	77 years	8 of 100 (Routine)

Climate Trend

54 complete years, 1922 to 2011

One stripe for each of 54 complete years at Lees Ferry, 1922 to 2011. Blue stripes are years cooler than the station's own mean of 17.0 C (62.7 F); red stripes are warmer. The coolest year was 1930, at 15.5 C (59.9 F), and the warmest was 2003, at 18.6 C (65.5 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Lees Ferry as warming stripes, 1922 to 2011
Year	Annual mean temperature	Difference from the station mean
1922	15.9 C	-1.13 C
1923	15.6 C	-1.40 C
1924	15.6 C	-1.48 C
1926	16.3 C	-0.71 C
1928	16.9 C	-0.19 C
1929	15.9 C	-1.13 C
1930	15.5 C	-1.53 C
1931	16.5 C	-0.53 C
1932	15.9 C	-1.12 C
1933	15.9 C	-1.14 C
1934	18.1 C	+1.07 C
1935	16.4 C	-0.69 C
1936	17.1 C	+0.02 C
1945	17.0 C	0.00 C
1946	17.4 C	+0.36 C
1947	17.8 C	+0.76 C
1948	16.8 C	-0.23 C
1949	16.5 C	-0.52 C
1950	17.5 C	+0.49 C
1951	17.1 C	+0.03 C
1952	17.1 C	+0.06 C
1953	17.3 C	+0.22 C
1954	18.1 C	+1.02 C
1955	17.1 C	+0.04 C
1956	17.3 C	+0.23 C
1957	17.2 C	+0.12 C
1958	17.8 C	+0.76 C
1959	17.9 C	+0.86 C
1960	17.5 C	+0.45 C
1963	17.3 C	+0.26 C
1966	17.2 C	+0.15 C
1967	16.7 C	-0.30 C
1968	16.3 C	-0.75 C
1969	17.4 C	+0.39 C
1970	17.1 C	+0.09 C
1971	16.9 C	-0.16 C
1972	17.5 C	+0.48 C
1973	16.7 C	-0.37 C
1974	17.5 C	+0.44 C
1976	16.9 C	-0.17 C
1978	17.5 C	+0.41 C
1982	16.5 C	-0.51 C
1985	17.2 C	+0.17 C
1986	18.3 C	+1.30 C
1999	17.0 C	-0.01 C
2001	17.9 C	+0.88 C
2002	17.9 C	+0.88 C
2003	18.6 C	+1.56 C
2004	17.5 C	+0.46 C
2006	17.0 C	-0.06 C
2007	17.7 C	+0.63 C
2008	17.1 C	+0.01 C
2010	17.0 C	-0.02 C
2011	16.8 C	-0.24 C

The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1922 to 2011. In Fahrenheit: 0.2 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 54 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Lees Ferry
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.1 C (0.1 to 0.2) per decade	0.2 F (0.1 to 0.4) per decade	1922 to 2011	54	Rise
Mean daily maximum	0.07 C (-0.02 to 0.16) per decade	0.13 F (-0.03 to 0.29) per decade	1922 to 2011	54	Not clearly different from zero
Mean daily minimum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.3 to 0.5) per decade	1922 to 2011	54	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

1916 to 2012

Yearly extremes at Lees Ferry: 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)	2005	43.9 C (111.0 F)	85
Coldest night (TNn)	-16.7 C (1.9 F)	1924	-8.9 C (16.0 F)	85
Wettest day (Rx1day)	52.3 mm (2.1 in)	1934	19.1 mm (0.8 in)	91
Wettest five days (Rx5day)	73.5 mm (2.9 in)	1973	26.2 mm (1.0 in)	91
Longest dry spell (CDD)	159 days	1972	65 days	91

Hottest day (TXx)

The hottest day of the year at Lees Ferry, 1916 to 2012. The record is 48.3 C (118.9 F) in 2005, marked on the chart; the median year is 43.9 C (111.0 F).

Hottest day (TXx) at Lees Ferry by year
Year	Hottest day (TXx)
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	36.1 C (97.0 F)
1922	43.9 C (111.0 F)
1923	43.3 C (109.9 F)
1924	43.3 C (109.9 F)
1925	44.4 C (111.9 F)
1926	42.2 C (108.0 F)
1927	43.3 C (109.9 F)
1928	41.7 C (107.1 F)
1929	43.9 C (111.0 F)
1930	43.3 C (109.9 F)
1931	45.6 C (114.1 F)
1932	42.2 C (108.0 F)
1933	43.3 C (109.9 F)
1934	44.4 C (111.9 F)
1935	42.8 C (109.0 F)
1936	45.6 C (114.1 F)
1937	43.9 C (111.0 F)
1938	37.2 C (99.0 F)
1939	n/a
1943	44.4 C (111.9 F)
1944	43.9 C (111.0 F)
1945	42.8 C (109.0 F)
1946	42.8 C (109.0 F)
1947	43.9 C (111.0 F)
1948	43.9 C (111.0 F)
1949	43.9 C (111.0 F)
1950	45.0 C (113.0 F)
1951	44.4 C (111.9 F)
1952	43.3 C (109.9 F)
1953	43.3 C (109.9 F)
1954	46.1 C (115.0 F)
1955	42.2 C (108.0 F)
1956	44.4 C (111.9 F)
1957	43.3 C (109.9 F)
1958	45.0 C (113.0 F)
1959	43.9 C (111.0 F)
1960	44.4 C (111.9 F)
1961	45.6 C (114.1 F)
1962	43.9 C (111.0 F)
1963	43.3 C (109.9 F)
1964	43.3 C (109.9 F)
1965	41.7 C (107.1 F)
1966	42.8 C (109.0 F)
1967	43.3 C (109.9 F)
1968	43.9 C (111.0 F)
1969	43.9 C (111.0 F)
1970	45.6 C (114.1 F)
1971	44.4 C (111.9 F)
1972	45.0 C (113.0 F)
1973	44.4 C (111.9 F)
1974	43.9 C (111.0 F)
1975	42.8 C (109.0 F)
1976	44.4 C (111.9 F)
1977	43.3 C (109.9 F)
1978	42.8 C (109.0 F)
1979	43.9 C (111.0 F)
1980	44.4 C (111.9 F)
1981	44.4 C (111.9 F)
1982	43.3 C (109.9 F)
1983	42.8 C (109.0 F)
1984	43.9 C (111.0 F)
1985	45.6 C (114.1 F)
1986	44.4 C (111.9 F)
1987	42.2 C (108.0 F)
1988	44.4 C (111.9 F)
1989	46.1 C (115.0 F)
1990	46.7 C (116.1 F)
1991	45.0 C (113.0 F)
1992	43.3 C (109.9 F)
1993	41.7 C (107.1 F)
1994	46.1 C (115.0 F)
1995	41.7 C (107.1 F)
1999	45.6 C (114.1 F)
2000	45.0 C (113.0 F)
2001	44.4 C (111.9 F)
2002	47.2 C (117.0 F)
2003	47.2 C (117.0 F)
2004	43.3 C (109.9 F)
2005	48.3 C (118.9 F)
2006	43.3 C (109.9 F)
2007	43.3 C (109.9 F)
2008	42.8 C (109.0 F)
2009	44.4 C (111.9 F)
2010	43.9 C (111.0 F)
2011	43.3 C (109.9 F)
2012	15.6 C (60.1 F)

Coldest night (TNn)

The coldest night of the year at Lees Ferry, 1916 to 2012. The record is -16.7 C (1.9 F) in 1924, marked on the chart; the median year is -8.9 C (16.0 F).

Coldest night (TNn) at Lees Ferry by year
Year	Coldest night (TNn)
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	-7.2 C (19.0 F)
1922	-9.4 C (15.1 F)
1923	-6.1 C (21.0 F)
1924	-16.7 C (1.9 F)
1925	-12.8 C (9.0 F)
1926	-10.6 C (12.9 F)
1927	-10.6 C (12.9 F)
1928	-10.0 C (14.0 F)
1929	-8.3 C (17.1 F)
1930	-11.1 C (12.0 F)
1931	-10.6 C (12.9 F)
1932	-15.0 C (5.0 F)
1933	-14.4 C (6.1 F)
1934	-8.3 C (17.1 F)
1935	-10.6 C (12.9 F)
1936	-7.2 C (19.0 F)
1937	-14.4 C (6.1 F)
1938	-5.6 C (21.9 F)
1939	n/a
1943	-3.9 C (25.0 F)
1944	-7.2 C (19.0 F)
1945	-10.6 C (12.9 F)
1946	-7.8 C (18.0 F)
1947	-8.9 C (16.0 F)
1948	-10.0 C (14.0 F)
1949	-12.8 C (9.0 F)
1950	-11.7 C (10.9 F)
1951	-8.3 C (17.1 F)
1952	-8.3 C (17.1 F)
1953	-8.9 C (16.0 F)
1954	-8.9 C (16.0 F)
1955	-11.7 C (10.9 F)
1956	-9.4 C (15.1 F)
1957	-5.6 C (21.9 F)
1958	-6.1 C (21.0 F)
1959	-9.4 C (15.1 F)
1960	-7.8 C (18.0 F)
1961	-13.3 C (8.1 F)
1962	-10.6 C (12.9 F)
1963	-16.1 C (3.0 F)
1964	-11.1 C (12.0 F)
1965	-4.4 C (24.1 F)
1966	-11.7 C (10.9 F)
1967	-11.7 C (10.9 F)
1968	-13.3 C (8.1 F)
1969	-6.7 C (19.9 F)
1970	-10.6 C (12.9 F)
1971	-14.4 C (6.1 F)
1972	-9.4 C (15.1 F)
1973	-6.7 C (19.9 F)
1974	-10.0 C (14.0 F)
1975	-7.2 C (19.0 F)
1976	-8.9 C (16.0 F)
1977	-9.4 C (15.1 F)
1978	-11.1 C (12.0 F)
1979	-10.6 C (12.9 F)
1980	-6.1 C (21.0 F)
1981	-5.0 C (23.0 F)
1982	-9.4 C (15.1 F)
1983	-7.8 C (18.0 F)
1984	-6.1 C (21.0 F)
1985	-10.6 C (12.9 F)
1986	-5.6 C (21.9 F)
1987	-9.4 C (15.1 F)
1988	-8.3 C (17.1 F)
1989	-11.7 C (10.9 F)
1990	-12.8 C (9.0 F)
1991	-12.8 C (9.0 F)
1992	-7.8 C (18.0 F)
1993	-6.7 C (19.9 F)
1994	-7.2 C (19.0 F)
1995	-3.9 C (25.0 F)
1999	-7.8 C (18.0 F)
2000	-7.2 C (19.0 F)
2001	-8.3 C (17.1 F)
2002	-7.8 C (18.0 F)
2003	-6.7 C (19.9 F)
2004	-7.8 C (18.0 F)
2005	-3.9 C (25.0 F)
2006	-7.8 C (18.0 F)
2007	-8.9 C (16.0 F)
2008	-7.2 C (19.0 F)
2009	-7.2 C (19.0 F)
2010	-5.6 C (21.9 F)
2011	-11.7 C (10.9 F)
2012	-5.6 C (21.9 F)

Wettest day (Rx1day)

The wettest day of the year at Lees Ferry, 1916 to 2012. The record is 52.3 mm (2.1 in) in 1934, marked on the chart; the median year is 19.1 mm (0.8 in).

Wettest day (Rx1day) at Lees Ferry by year
Year	Wettest day (Rx1day)
1916	25.4 mm (1.0 in)
1917	18.5 mm (0.7 in)
1918	21.1 mm (0.8 in)
1919	22.4 mm (0.9 in)
1920	14.5 mm (0.6 in)
1921	15.2 mm (0.6 in)
1922	10.2 mm (0.4 in)
1923	19.1 mm (0.8 in)
1924	17.8 mm (0.7 in)
1925	26.7 mm (1.1 in)
1926	24.6 mm (1.0 in)
1927	12.7 mm (0.5 in)
1928	12.7 mm (0.5 in)
1929	11.2 mm (0.4 in)
1930	12.2 mm (0.5 in)
1931	10.9 mm (0.4 in)
1932	19.1 mm (0.8 in)
1933	16.3 mm (0.6 in)
1934	52.3 mm (2.1 in)
1935	24.4 mm (1.0 in)
1936	16.0 mm (0.6 in)
1937	26.2 mm (1.0 in)
1938	18.0 mm (0.7 in)
1939	3.8 mm (0.15 in)
1943	11.7 mm (0.5 in)
1944	8.9 mm (0.35 in)
1945	13.7 mm (0.5 in)
1946	35.6 mm (1.4 in)
1947	23.4 mm (0.9 in)
1948	35.6 mm (1.4 in)
1949	24.9 mm (1.0 in)
1950	14.0 mm (0.6 in)
1951	31.5 mm (1.2 in)
1952	16.0 mm (0.6 in)
1953	39.6 mm (1.6 in)
1954	20.3 mm (0.8 in)
1955	25.7 mm (1.0 in)
1956	7.6 mm (0.30 in)
1957	24.6 mm (1.0 in)
1958	22.1 mm (0.9 in)
1959	26.7 mm (1.1 in)
1960	30.5 mm (1.2 in)
1961	12.7 mm (0.5 in)
1962	8.4 mm (0.33 in)
1963	25.1 mm (1.0 in)
1964	6.1 mm (0.24 in)
1965	10.7 mm (0.4 in)
1966	16.5 mm (0.6 in)
1967	41.7 mm (1.6 in)
1968	17.5 mm (0.7 in)
1969	19.6 mm (0.8 in)
1970	17.3 mm (0.7 in)
1971	14.7 mm (0.6 in)
1972	19.6 mm (0.8 in)
1973	37.1 mm (1.5 in)
1974	8.9 mm (0.35 in)
1975	23.6 mm (0.9 in)
1976	21.1 mm (0.8 in)
1977	10.2 mm (0.4 in)
1978	16.0 mm (0.6 in)
1979	22.4 mm (0.9 in)
1980	37.8 mm (1.5 in)
1981	30.0 mm (1.2 in)
1982	14.5 mm (0.6 in)
1983	29.5 mm (1.2 in)
1984	13.7 mm (0.5 in)
1985	21.1 mm (0.8 in)
1986	19.3 mm (0.8 in)
1987	13.2 mm (0.5 in)
1988	22.9 mm (0.9 in)
1989	12.7 mm (0.5 in)
1990	15.7 mm (0.6 in)
1991	15.5 mm (0.6 in)
1992	14.2 mm (0.6 in)
1993	15.2 mm (0.6 in)
1994	44.5 mm (1.8 in)
1995	5.3 mm (0.21 in)
1999	24.4 mm (1.0 in)
2000	42.4 mm (1.7 in)
2001	11.9 mm (0.5 in)
2002	45.7 mm (1.8 in)
2003	23.9 mm (0.9 in)
2004	33.5 mm (1.3 in)
2005	21.6 mm (0.9 in)
2006	15.2 mm (0.6 in)
2007	24.4 mm (1.0 in)
2008	36.8 mm (1.4 in)
2009	26.4 mm (1.0 in)
2010	27.9 mm (1.1 in)
2011	11.4 mm (0.4 in)
2012	4.3 mm (0.17 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lees Ferry, 1916 to 2012. The record is 73.5 mm (2.9 in) in 1973, marked on the chart; the median year is 26.2 mm (1.0 in).

Wettest five days (Rx5day) at Lees Ferry by year
Year	Wettest five days (Rx5day)
1916	54.4 mm (2.1 in)
1917	27.9 mm (1.1 in)
1918	21.1 mm (0.8 in)
1919	22.4 mm (0.9 in)
1920	21.1 mm (0.8 in)
1921	21.6 mm (0.9 in)
1922	10.2 mm (0.4 in)
1923	24.2 mm (1.0 in)
1924	24.6 mm (1.0 in)
1925	33.0 mm (1.3 in)
1926	26.4 mm (1.0 in)
1927	24.9 mm (1.0 in)
1928	18.3 mm (0.7 in)
1929	27.4 mm (1.1 in)
1930	22.3 mm (0.9 in)
1931	14.7 mm (0.6 in)
1932	20.3 mm (0.8 in)
1933	16.6 mm (0.7 in)
1934	57.1 mm (2.2 in)
1935	36.8 mm (1.4 in)
1936	30.7 mm (1.2 in)
1937	31.0 mm (1.2 in)
1938	23.4 mm (0.9 in)
1939	3.8 mm (0.15 in)
1943	13.2 mm (0.5 in)
1944	10.7 mm (0.4 in)
1945	17.8 mm (0.7 in)
1946	43.7 mm (1.7 in)
1947	45.5 mm (1.8 in)
1948	40.2 mm (1.6 in)
1949	27.2 mm (1.1 in)
1950	31.8 mm (1.3 in)
1951	34.3 mm (1.4 in)
1952	19.8 mm (0.8 in)
1953	46.0 mm (1.8 in)
1954	37.3 mm (1.5 in)
1955	26.0 mm (1.0 in)
1956	17.3 mm (0.7 in)
1957	27.5 mm (1.1 in)
1958	24.4 mm (1.0 in)
1959	46.0 mm (1.8 in)
1960	36.6 mm (1.4 in)
1961	28.7 mm (1.1 in)
1962	16.8 mm (0.7 in)
1963	25.1 mm (1.0 in)
1964	9.7 mm (0.38 in)
1965	18.2 mm (0.7 in)
1966	26.2 mm (1.0 in)
1967	43.2 mm (1.7 in)
1968	17.5 mm (0.7 in)
1969	19.6 mm (0.8 in)
1970	27.2 mm (1.1 in)
1971	18.0 mm (0.7 in)
1972	38.4 mm (1.5 in)
1973	73.5 mm (2.9 in)
1974	14.2 mm (0.6 in)
1975	28.2 mm (1.1 in)
1976	23.6 mm (0.9 in)
1977	15.4 mm (0.6 in)
1978	43.7 mm (1.7 in)
1979	23.6 mm (0.9 in)
1980	38.8 mm (1.5 in)
1981	52.6 mm (2.1 in)
1982	22.3 mm (0.9 in)
1983	39.7 mm (1.6 in)
1984	28.5 mm (1.1 in)
1985	34.3 mm (1.4 in)
1986	24.4 mm (1.0 in)
1987	19.0 mm (0.7 in)
1988	40.9 mm (1.6 in)
1989	26.0 mm (1.0 in)
1990	18.0 mm (0.7 in)
1991	30.0 mm (1.2 in)
1992	24.7 mm (1.0 in)
1993	33.9 mm (1.3 in)
1994	45.0 mm (1.8 in)
1995	8.6 mm (0.34 in)
1999	29.0 mm (1.1 in)
2000	58.6 mm (2.3 in)
2001	20.0 mm (0.8 in)
2002	52.6 mm (2.1 in)
2003	31.3 mm (1.2 in)
2004	42.6 mm (1.7 in)
2005	24.6 mm (1.0 in)
2006	15.2 mm (0.6 in)
2007	26.4 mm (1.0 in)
2008	36.8 mm (1.4 in)
2009	27.2 mm (1.1 in)
2010	55.9 mm (2.2 in)
2011	17.0 mm (0.7 in)
2012	4.3 mm (0.17 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lees Ferry, 1916 to 2012. The record is 159 days in 1972, marked on the chart; the median year is 65 days.

Longest dry spell (CDD) at Lees Ferry by year
Year	Longest dry spell (CDD)
1916	61 days
1917	94 days
1918	57 days
1919	38 days
1920	25 days
1921	31 days
1922	88 days
1923	54 days
1924	61 days
1925	43 days
1926	59 days
1927	55 days
1928	56 days
1929	62 days
1930	45 days
1931	56 days
1932	76 days
1933	89 days
1934	79 days
1935	76 days
1936	65 days
1937	82 days
1938	104 days
1939	74 days
1943	50 days
1944	78 days
1945	71 days
1946	74 days
1947	134 days
1948	58 days
1949	73 days
1950	114 days
1951	65 days
1952	54 days
1953	60 days
1954	36 days
1955	81 days
1956	72 days
1957	41 days
1958	72 days
1959	48 days
1960	49 days
1961	50 days
1962	66 days
1963	66 days
1964	48 days
1965	28 days
1966	73 days
1967	78 days
1968	50 days
1969	44 days
1970	88 days
1971	55 days
1972	159 days
1973	89 days
1974	54 days
1975	69 days
1976	89 days
1977	110 days
1978	69 days
1979	67 days
1980	81 days
1981	32 days
1982	41 days
1983	46 days
1984	60 days
1985	59 days
1986	68 days
1987	49 days
1988	68 days
1989	107 days
1990	39 days
1991	54 days
1992	36 days
1993	79 days
1994	52 days
1995	34 days
1999	99 days
2000	81 days
2001	48 days
2002	116 days
2003	90 days
2004	87 days
2005	63 days
2006	98 days
2007	98 days
2008	73 days
2009	120 days
2010	42 days
2011	46 days
2012	21 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

54 years with a frost

Across 54 years with a frost, the median last spring frost at Lees Ferry falls on 19 March and the median first autumn frost on 13 November, which leaves a median of 240 days between them.

Fitted over all years, the growing season changes by +3.2 days per decade at this station.

Frost dates and growing season at Lees Ferry
Measure	Median, all years	Earliest period	Recent period (1956 to 2011)	Recent against earliest	Fitted trend
Last spring frost	19 March	n/a	14 March	n/a	-1.5 days per decade
First autumn frost	13 November	n/a	18 November	n/a	+1.7 days per decade
Growing days	240 days	n/a	252 days	n/a	+3.2 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

72 years, 1922 to 2010

A day with at least 20.5 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 56.6 mm (2.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Lees Ferry: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	20.5 mm (0.8 in)
5 years	29.6 mm (1.2 in)
10 years	35.8 mm (1.4 in)
25 years	43.9 mm (1.7 in)
50 years	50.2 mm (2.0 in)
100 years	56.6 mm (2.2 in)	Longer than the 72 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, 72 years of values from 1922 to 2010.

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: 52.3 mm (2.1 in) in 1934; 45.7 mm (1.8 in) in 2002; 44.5 mm (1.8 in) in 1994.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Lees Ferry, at 1999. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1999 ran 0.5 C (1.0 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Lees Ferry, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1999	-0.5	-1.0	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 Lees Ferry standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lees Ferry 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).