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
Record highRecord low2026 daily maximum2026 daily minimum
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
Year with most
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
Complete yearUnder 90 percent of days
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.
Cooler than the station meanWarmer than the station mean
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.