Record envelope, standing records and threshold days for Ft Duchesne (USC00422996), Utah, United States, with 139 years of record.
Key Facts for Ft Duchesne
Ft Duchesne (USC00422996) is a weather station in Utah, United States at 40.28 latitude and -109.86 longitude, 1,540 m (5,052 ft) above sea level.
The station reports from 1887 to 2025, 139 years of record.
1,464 records set at Ft Duchesne still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ft Duchesne set a daily record low minimum temperature of -7.8 C (18.0 F) on 19 April 2025.
About the Station
Location: Utah, United States, 40.28 latitude, -109.86 longitude.
Elevation: 1,540 m (5,052 ft).
Period of record: 1887 to 2025, 139 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 Ft Duchesne. 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 Ft Duchesne, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.6 C (60.1 F)
-40.0 C (-40.0 F)
n/a
n/a
Feb
19.4 C (66.9 F)
-37.8 C (-36.0 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Apr
30.6 C (87.1 F)
-16.1 C (3.0 F)
n/a
n/a
May
35.0 C (95.0 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
40.6 C (105.1 F)
-6.1 C (21.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
-3.3 C (26.1 F)
n/a
n/a
Aug
41.1 C (106.0 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-6.7 C (19.9 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-28.3 C (-18.9 F)
n/a
n/a
Dec
22.2 C (72.0 F)
-39.4 C (-38.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ft Duchesne still stand. 2000 holds the most, with 78.
Standing records at Ft Duchesne by the year they were set
Year set
Standing records
1887
1
1888
9
1889
18
1890
5
1891
8
1892
4
1893
27
1902
22
1903
26
1904
19
1905
9
1906
12
1907
9
1908
11
1909
12
1910
17
1911
27
1912
13
1913
16
1914
6
1915
8
1916
16
1917
12
1918
9
1919
2
1920
5
1921
8
1922
8
1923
14
1924
15
1925
5
1926
11
1927
5
1928
7
1929
22
1930
18
1931
35
1932
12
1933
17
1934
7
1935
1
1936
11
1937
28
1938
1
1939
2
1940
10
1941
3
1942
10
1943
5
1944
1
1945
15
1946
6
1947
5
1948
5
1949
11
1950
13
1951
5
1952
22
1953
8
1954
13
1955
11
1956
9
1957
5
1958
18
1959
12
1960
13
1961
5
1962
9
1963
5
1964
4
1965
22
1966
4
1967
7
1968
7
1969
15
1970
6
1971
17
1972
16
1973
8
1974
1
1975
9
1976
4
1977
11
1978
4
1979
7
1980
6
1981
10
1982
1
1983
6
1984
14
1985
11
1986
11
1987
9
1988
7
1989
14
1990
21
1991
2
1992
11
1993
6
1994
12
1995
9
1996
22
1997
12
1998
23
1999
34
2000
78
2001
8
2002
10
2003
2
2004
7
2005
6
2006
6
2007
10
2008
7
2009
6
2010
3
2011
5
2012
9
2013
15
2014
10
2015
14
2016
8
2017
9
2018
11
2019
10
2020
17
2021
14
2022
25
2023
6
2024
10
2025
6
All-Time Record Progression
4 new records
4 all-time records were set at Ft Duchesne between 9 January 1937 and 4 August 2000. Each dot is a new record.
When Ft Duchesne set new all-time records
Date
Kind
Detail
1937-01-09
Record low maximum temperature
Record low maximum temperature -23.3 C (-9.9 F)
1937-01-09
Record low minimum temperature
Record low minimum temperature -40.0 C (-40.0 F)
1952-01-04
Record low maximum temperature
Record low maximum temperature -24.4 C (-11.9 F)
2000-08-04
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
Wettest Day of Each Month
Sep: 103.1 mm (4.1 in)
The wettest day on record for each calendar month at Ft Duchesne. The most was 103.1 mm (4.1 in) on 29 September 1905.
Record daily precipitation for each month at Ft Duchesne
Month
Record daily precipitation (mm)
Date
Jan
25.4 mm (1.0 in)
23 January 1909
Feb
26.7 mm (1.1 in)
28 February 1983
Mar
38.1 mm (1.5 in)
23 March 1929
Apr
24.9 mm (1.0 in)
29 April 1893
May
46.7 mm (1.8 in)
25 May 1904
Jun
33.0 mm (1.3 in)
11 June 1965
Jul
28.4 mm (1.1 in)
23 July 1984
Aug
77.7 mm (3.1 in)
14 August 1978
Sep
103.1 mm (4.1 in)
29 September 1905
Oct
36.3 mm (1.4 in)
9 October 1961
Nov
38.1 mm (1.5 in)
13 November 1913
Dec
29.2 mm (1.1 in)
30 December 1951
Period of Record Coverage
1887 to 2025
Complete yearUnder 90 percent of days
131 years of record at Ft Duchesne, 1887 to 2025. 32 years have data for under 90 percent of days and are left out of rankings: 1887, 1890, 1891, 1892, 1893, 1902, 1904, 1907 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 86 complete years at Ft Duchesne, 1888 to 2024. Blue stripes are years cooler than the station's own mean of 7.5 C (45.6 F); red stripes are warmer. The coolest year was 1931, at 4.7 C (40.4 F), and the warmest was 2024, at 10.1 C (50.2 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Ft Duchesne as warming stripes, 1888 to 2024
Year
Annual mean temperature
Difference from the station mean
1888
7.5 C
-0.04 C
1889
8.1 C
+0.57 C
1905
7.2 C
-0.34 C
1906
6.8 C
-0.74 C
1909
5.6 C
-1.94 C
1910
8.1 C
+0.57 C
1911
8.1 C
+0.59 C
1913
7.4 C
-0.09 C
1914
7.5 C
-0.04 C
1915
7.5 C
+0.01 C
1918
7.8 C
+0.29 C
1921
8.0 C
+0.51 C
1922
6.4 C
-1.15 C
1923
5.3 C
-2.24 C
1924
5.6 C
-1.91 C
1925
6.9 C
-0.68 C
1926
6.4 C
-1.11 C
1929
5.2 C
-2.38 C
1930
5.4 C
-2.14 C
1931
4.7 C
-2.87 C
1932
5.8 C
-1.72 C
1933
7.5 C
-0.08 C
1934
9.7 C
+2.13 C
1935
7.8 C
+0.26 C
1936
8.7 C
+1.14 C
1937
6.2 C
-1.31 C
1938
8.4 C
+0.83 C
1943
8.3 C
+0.81 C
1944
6.4 C
-1.12 C
1945
8.0 C
+0.46 C
1946
8.4 C
+0.85 C
1947
7.9 C
+0.40 C
1948
7.0 C
-0.51 C
1949
6.0 C
-1.51 C
1950
6.5 C
-0.99 C
1951
7.3 C
-0.27 C
1953
7.7 C
+0.21 C
1954
8.7 C
+1.17 C
1956
7.5 C
-0.07 C
1957
6.8 C
-0.77 C
1959
7.8 C
+0.23 C
1960
6.6 C
-0.92 C
1961
7.4 C
-0.16 C
1962
7.4 C
-0.18 C
1963
8.1 C
+0.55 C
1964
6.4 C
-1.09 C
1965
6.5 C
-1.05 C
1966
7.0 C
-0.49 C
1967
6.1 C
-1.44 C
1968
5.7 C
-1.80 C
1969
7.5 C
-0.06 C
1970
7.2 C
-0.29 C
1971
7.0 C
-0.56 C
1972
8.0 C
+0.49 C
1973
5.1 C
-2.45 C
1974
6.5 C
-1.03 C
1976
7.2 C
-0.33 C
1981
9.7 C
+2.13 C
1982
7.7 C
+0.12 C
1983
7.7 C
+0.14 C
1984
5.8 C
-1.77 C
1985
6.5 C
-1.07 C
1986
9.3 C
+1.74 C
1987
8.9 C
+1.34 C
1988
8.0 C
+0.44 C
1989
8.2 C
+0.63 C
1993
7.2 C
-0.38 C
1994
10.0 C
+2.49 C
1995
9.4 C
+1.88 C
1999
9.0 C
+1.49 C
2006
9.0 C
+1.47 C
2007
8.2 C
+0.68 C
2011
6.9 C
-0.67 C
2012
9.8 C
+2.26 C
2013
6.6 C
-0.94 C
2014
9.2 C
+1.62 C
2015
9.5 C
+1.95 C
2016
8.8 C
+1.23 C
2017
9.2 C
+1.64 C
2018
9.6 C
+2.02 C
2019
7.2 C
-0.30 C
2020
8.5 C
+0.98 C
2021
9.3 C
+1.79 C
2022
8.6 C
+1.04 C
2023
7.1 C
-0.47 C
2024
10.1 C
+2.59 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1888 to 2024. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 86 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ft Duchesne
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1888 to 2024
86
Rise
Mean daily maximum
0.09 C (0.01 to 0.17) per decade
0.16 F (0.02 to 0.30) per decade
1888 to 2024
86
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.5) per decade
1888 to 2024
86
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
1887 to 2025
Yearly extremes at Ft Duchesne: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1905
37.2 C (99.0 F)
131
Coldest night (TNn)
-40.0 C (-40.0 F)
1937
-27.8 C (-18.0 F)
131
Wettest day (Rx1day)
103.1 mm (4.1 in)
1905
18.3 mm (0.7 in)
131
Wettest five days (Rx5day)
104.1 mm (4.1 in)
1905
26.0 mm (1.0 in)
131
Longest dry spell (CDD)
133 days
2002
48 days
131
Hottest day (TXx)
The hottest day of the year at Ft Duchesne, 1887 to 2025. The record is 41.7 C (107.1 F) in 1905, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Ft Duchesne by year
Year
Hottest day (TXx)
1887
1.3 C (34.3 F)
1888
38.7 C (101.7 F)
1889
38.3 C (100.9 F)
1890
34.4 C (93.9 F)
1891
37.2 C (99.0 F)
1892
37.8 C (100.0 F)
1893
36.7 C (98.1 F)
1902
40.0 C (104.0 F)
1903
36.7 C (98.1 F)
1904
36.1 C (97.0 F)
1905
41.7 C (107.1 F)
1906
35.0 C (95.0 F)
1907
35.6 C (96.1 F)
1908
36.1 C (97.0 F)
1909
38.3 C (100.9 F)
1910
38.9 C (102.0 F)
1911
37.8 C (100.0 F)
1912
36.7 C (98.1 F)
1913
35.6 C (96.1 F)
1914
34.4 C (93.9 F)
1915
34.4 C (93.9 F)
1916
34.4 C (93.9 F)
1917
36.1 C (97.0 F)
1918
37.2 C (99.0 F)
1919
31.1 C (88.0 F)
1920
37.2 C (99.0 F)
1921
36.1 C (97.0 F)
1922
37.8 C (100.0 F)
1923
36.7 C (98.1 F)
1924
35.0 C (95.0 F)
1925
36.7 C (98.1 F)
1926
36.1 C (97.0 F)
1927
35.0 C (95.0 F)
1928
36.7 C (98.1 F)
1929
36.7 C (98.1 F)
1930
36.1 C (97.0 F)
1931
38.3 C (100.9 F)
1932
37.2 C (99.0 F)
1933
38.9 C (102.0 F)
1934
37.2 C (99.0 F)
1935
36.1 C (97.0 F)
1936
37.8 C (100.0 F)
1937
36.1 C (97.0 F)
1938
36.7 C (98.1 F)
1939
37.2 C (99.0 F)
1940
38.3 C (100.9 F)
1941
35.0 C (95.0 F)
1942
35.6 C (96.1 F)
1943
36.7 C (98.1 F)
1944
35.0 C (95.0 F)
1945
38.3 C (100.9 F)
1946
36.1 C (97.0 F)
1947
36.7 C (98.1 F)
1948
35.0 C (95.0 F)
1949
36.1 C (97.0 F)
1950
35.0 C (95.0 F)
1951
36.7 C (98.1 F)
1952
36.1 C (97.0 F)
1953
37.8 C (100.0 F)
1954
39.4 C (102.9 F)
1955
36.7 C (98.1 F)
1956
36.1 C (97.0 F)
1957
36.7 C (98.1 F)
1958
37.8 C (100.0 F)
1959
37.8 C (100.0 F)
1960
38.9 C (102.0 F)
1961
37.8 C (100.0 F)
1962
37.2 C (99.0 F)
1963
37.2 C (99.0 F)
1964
37.2 C (99.0 F)
1965
34.4 C (93.9 F)
1966
36.1 C (97.0 F)
1967
36.7 C (98.1 F)
1968
35.6 C (96.1 F)
1969
37.8 C (100.0 F)
1970
36.7 C (98.1 F)
1971
37.2 C (99.0 F)
1972
38.3 C (100.9 F)
1973
37.8 C (100.0 F)
1974
36.7 C (98.1 F)
1975
36.1 C (97.0 F)
1976
38.3 C (100.9 F)
1977
36.7 C (98.1 F)
1978
37.8 C (100.0 F)
1979
37.8 C (100.0 F)
1980
37.2 C (99.0 F)
1981
36.7 C (98.1 F)
1982
36.7 C (98.1 F)
1983
36.7 C (98.1 F)
1984
36.1 C (97.0 F)
1985
37.2 C (99.0 F)
1986
37.2 C (99.0 F)
1987
36.7 C (98.1 F)
1988
37.8 C (100.0 F)
1989
40.6 C (105.1 F)
1990
38.3 C (100.9 F)
1991
36.1 C (97.0 F)
1992
36.1 C (97.0 F)
1993
37.2 C (99.0 F)
1994
41.1 C (106.0 F)
1995
41.1 C (106.0 F)
1996
38.3 C (100.9 F)
1997
37.2 C (99.0 F)
1998
38.9 C (102.0 F)
1999
37.8 C (100.0 F)
2000
40.6 C (105.1 F)
2001
40.6 C (105.1 F)
2002
40.0 C (104.0 F)
2003
39.4 C (102.9 F)
2004
37.2 C (99.0 F)
2005
40.0 C (104.0 F)
2006
39.4 C (102.9 F)
2007
38.3 C (100.9 F)
2008
38.3 C (100.9 F)
2009
36.7 C (98.1 F)
2010
37.2 C (99.0 F)
2011
36.1 C (97.0 F)
2012
37.2 C (99.0 F)
2013
38.9 C (102.0 F)
2014
37.8 C (100.0 F)
2015
38.3 C (100.9 F)
2016
39.4 C (102.9 F)
2017
37.8 C (100.0 F)
2018
40.0 C (104.0 F)
2019
37.2 C (99.0 F)
2020
39.4 C (102.9 F)
2021
41.7 C (107.1 F)
2022
38.9 C (102.0 F)
2023
40.6 C (105.1 F)
2024
40.0 C (104.0 F)
2025
31.7 C (89.1 F)
Coldest night (TNn)
The coldest night of the year at Ft Duchesne, 1887 to 2025. The record is -40.0 C (-40.0 F) in 1937, marked on the chart; the median year is -27.8 C (-18.0 F).
Coldest night (TNn) at Ft Duchesne by year
Year
Coldest night (TNn)
1887
-26.7 C (-16.1 F)
1888
-38.7 C (-37.7 F)
1889
-29.6 C (-21.3 F)
1890
-30.0 C (-22.0 F)
1891
-26.7 C (-16.1 F)
1892
-27.2 C (-17.0 F)
1893
-21.1 C (-6.0 F)
1902
-30.0 C (-22.0 F)
1903
-37.2 C (-35.0 F)
1904
-22.8 C (-9.0 F)
1905
-32.8 C (-27.0 F)
1906
-27.8 C (-18.0 F)
1907
-26.1 C (-15.0 F)
1908
-33.9 C (-29.0 F)
1909
-32.8 C (-27.0 F)
1910
-36.7 C (-34.1 F)
1911
-27.2 C (-17.0 F)
1912
-30.6 C (-23.1 F)
1913
-27.2 C (-17.0 F)
1914
-28.9 C (-20.0 F)
1915
-25.6 C (-14.1 F)
1916
-37.8 C (-36.0 F)
1917
-33.3 C (-27.9 F)
1918
-24.4 C (-11.9 F)
1919
-30.0 C (-22.0 F)
1920
-18.9 C (-2.0 F)
1921
-21.7 C (-7.1 F)
1922
-31.1 C (-24.0 F)
1923
-31.1 C (-24.0 F)
1924
-34.4 C (-29.9 F)
1925
-27.2 C (-17.0 F)
1926
-26.1 C (-15.0 F)
1927
-26.1 C (-15.0 F)
1928
-25.6 C (-14.1 F)
1929
-31.1 C (-24.0 F)
1930
-36.7 C (-34.1 F)
1931
-31.7 C (-25.1 F)
1932
-36.1 C (-33.0 F)
1933
-37.2 C (-35.0 F)
1934
-16.7 C (1.9 F)
1935
-22.8 C (-9.0 F)
1936
-26.1 C (-15.0 F)
1937
-40.0 C (-40.0 F)
1938
-23.3 C (-9.9 F)
1939
-27.2 C (-17.0 F)
1940
-31.1 C (-24.0 F)
1941
-28.9 C (-20.0 F)
1942
-29.4 C (-20.9 F)
1943
-21.7 C (-7.1 F)
1944
-30.6 C (-23.1 F)
1945
-23.3 C (-9.9 F)
1946
-22.2 C (-8.0 F)
1947
-27.8 C (-18.0 F)
1948
-28.9 C (-20.0 F)
1949
-36.7 C (-34.1 F)
1950
-36.1 C (-33.0 F)
1951
-30.0 C (-22.0 F)
1952
-38.9 C (-38.0 F)
1953
-23.3 C (-9.9 F)
1954
-25.0 C (-13.0 F)
1955
-32.2 C (-26.0 F)
1956
-28.3 C (-18.9 F)
1957
-30.0 C (-22.0 F)
1958
-19.4 C (-2.9 F)
1959
-25.0 C (-13.0 F)
1960
-30.6 C (-23.1 F)
1961
-24.4 C (-11.9 F)
1962
-33.9 C (-29.0 F)
1963
-30.0 C (-22.0 F)
1964
-28.3 C (-18.9 F)
1965
-26.1 C (-15.0 F)
1966
-28.9 C (-20.0 F)
1967
-28.3 C (-18.9 F)
1968
-31.1 C (-24.0 F)
1969
-27.8 C (-18.0 F)
1970
-27.8 C (-18.0 F)
1971
-31.1 C (-24.0 F)
1972
-29.4 C (-20.9 F)
1973
-32.8 C (-27.0 F)
1974
-32.8 C (-27.0 F)
1975
-26.7 C (-16.1 F)
1976
-25.6 C (-14.1 F)
1977
-23.3 C (-9.9 F)
1978
-30.6 C (-23.1 F)
1979
-35.0 C (-31.0 F)
1980
-28.9 C (-20.0 F)
1981
-18.9 C (-2.0 F)
1982
-27.2 C (-17.0 F)
1983
-25.6 C (-14.1 F)
1984
-35.6 C (-32.1 F)
1985
-33.9 C (-29.0 F)
1986
-19.4 C (-2.9 F)
1987
-31.1 C (-24.0 F)
1988
-27.8 C (-18.0 F)
1989
-36.1 C (-33.0 F)
1990
-39.4 C (-38.9 F)
1991
-25.6 C (-14.1 F)
1992
-22.2 C (-8.0 F)
1993
-26.7 C (-16.1 F)
1994
-18.3 C (-0.9 F)
1995
-16.7 C (1.9 F)
1996
-23.3 C (-9.9 F)
1997
-26.1 C (-15.0 F)
1998
-33.3 C (-27.9 F)
1999
-28.3 C (-18.9 F)
2000
-16.1 C (3.0 F)
2001
-22.2 C (-8.0 F)
2002
-21.7 C (-7.1 F)
2003
-22.8 C (-9.0 F)
2004
-23.9 C (-11.0 F)
2005
-21.1 C (-6.0 F)
2006
-18.9 C (-2.0 F)
2007
-31.7 C (-25.1 F)
2008
-27.2 C (-17.0 F)
2009
-28.9 C (-20.0 F)
2010
-28.9 C (-20.0 F)
2011
-30.0 C (-22.0 F)
2012
-23.3 C (-9.9 F)
2013
-28.3 C (-18.9 F)
2014
-23.9 C (-11.0 F)
2015
-23.9 C (-11.0 F)
2016
-23.3 C (-9.9 F)
2017
-26.7 C (-16.1 F)
2018
-17.8 C (0.0 F)
2019
-22.8 C (-9.0 F)
2020
-21.7 C (-7.1 F)
2021
-22.8 C (-9.0 F)
2022
-26.1 C (-15.0 F)
2023
-27.8 C (-18.0 F)
2024
-18.9 C (-2.0 F)
2025
-20.0 C (-4.0 F)
Wettest day (Rx1day)
The wettest day of the year at Ft Duchesne, 1887 to 2025. The record is 103.1 mm (4.1 in) in 1905, marked on the chart; the median year is 18.3 mm (0.7 in).
Wettest day (Rx1day) at Ft Duchesne by year
Year
Wettest day (Rx1day)
1887
5.3 mm (0.21 in)
1888
23.9 mm (0.9 in)
1889
10.7 mm (0.4 in)
1890
10.4 mm (0.4 in)
1891
12.7 mm (0.5 in)
1892
17.3 mm (0.7 in)
1893
24.9 mm (1.0 in)
1902
15.2 mm (0.6 in)
1903
24.1 mm (0.9 in)
1904
46.7 mm (1.8 in)
1905
103.1 mm (4.1 in)
1906
22.9 mm (0.9 in)
1907
17.8 mm (0.7 in)
1908
27.9 mm (1.1 in)
1909
25.4 mm (1.0 in)
1910
11.9 mm (0.5 in)
1911
16.5 mm (0.6 in)
1912
12.7 mm (0.5 in)
1913
38.1 mm (1.5 in)
1914
15.2 mm (0.6 in)
1915
26.7 mm (1.1 in)
1916
11.9 mm (0.5 in)
1917
14.2 mm (0.6 in)
1918
22.9 mm (0.9 in)
1919
26.7 mm (1.1 in)
1920
21.1 mm (0.8 in)
1921
24.9 mm (1.0 in)
1922
30.5 mm (1.2 in)
1923
21.8 mm (0.9 in)
1924
8.6 mm (0.34 in)
1925
30.5 mm (1.2 in)
1926
8.9 mm (0.35 in)
1927
24.9 mm (1.0 in)
1928
25.7 mm (1.0 in)
1929
38.1 mm (1.5 in)
1930
16.5 mm (0.6 in)
1931
15.7 mm (0.6 in)
1932
22.9 mm (0.9 in)
1933
11.4 mm (0.4 in)
1934
11.9 mm (0.5 in)
1935
20.3 mm (0.8 in)
1936
17.0 mm (0.7 in)
1937
30.2 mm (1.2 in)
1938
20.8 mm (0.8 in)
1939
24.6 mm (1.0 in)
1940
16.8 mm (0.7 in)
1941
24.6 mm (1.0 in)
1942
22.1 mm (0.9 in)
1943
24.1 mm (0.9 in)
1944
20.1 mm (0.8 in)
1945
38.4 mm (1.5 in)
1946
15.2 mm (0.6 in)
1947
22.9 mm (0.9 in)
1948
10.9 mm (0.4 in)
1949
26.4 mm (1.0 in)
1950
15.2 mm (0.6 in)
1951
29.2 mm (1.1 in)
1952
10.4 mm (0.4 in)
1953
30.5 mm (1.2 in)
1954
23.9 mm (0.9 in)
1955
23.9 mm (0.9 in)
1956
14.0 mm (0.6 in)
1957
24.6 mm (1.0 in)
1958
11.9 mm (0.5 in)
1959
17.8 mm (0.7 in)
1960
22.4 mm (0.9 in)
1961
36.3 mm (1.4 in)
1962
10.9 mm (0.4 in)
1963
12.7 mm (0.5 in)
1964
27.9 mm (1.1 in)
1965
33.0 mm (1.3 in)
1966
21.3 mm (0.8 in)
1967
18.0 mm (0.7 in)
1968
16.0 mm (0.6 in)
1969
28.4 mm (1.1 in)
1970
26.7 mm (1.1 in)
1971
23.4 mm (0.9 in)
1972
15.0 mm (0.6 in)
1973
27.9 mm (1.1 in)
1974
8.1 mm (0.32 in)
1975
25.9 mm (1.0 in)
1976
7.9 mm (0.31 in)
1977
18.3 mm (0.7 in)
1978
77.7 mm (3.1 in)
1979
17.0 mm (0.7 in)
1980
31.8 mm (1.3 in)
1981
22.1 mm (0.9 in)
1982
16.5 mm (0.6 in)
1983
26.7 mm (1.1 in)
1984
28.4 mm (1.1 in)
1985
17.8 mm (0.7 in)
1986
18.8 mm (0.7 in)
1987
14.5 mm (0.6 in)
1988
11.2 mm (0.4 in)
1989
11.2 mm (0.4 in)
1990
15.7 mm (0.6 in)
1991
12.7 mm (0.5 in)
1992
22.1 mm (0.9 in)
1993
29.0 mm (1.1 in)
1994
24.4 mm (1.0 in)
1995
18.0 mm (0.7 in)
1996
12.7 mm (0.5 in)
1997
13.5 mm (0.5 in)
1998
15.2 mm (0.6 in)
1999
7.6 mm (0.30 in)
2000
16.3 mm (0.6 in)
2001
12.7 mm (0.5 in)
2002
24.1 mm (0.9 in)
2003
16.0 mm (0.6 in)
2004
24.9 mm (1.0 in)
2005
28.4 mm (1.1 in)
2006
32.8 mm (1.3 in)
2007
11.4 mm (0.4 in)
2008
15.7 mm (0.6 in)
2009
21.3 mm (0.8 in)
2010
12.7 mm (0.5 in)
2011
15.2 mm (0.6 in)
2012
17.0 mm (0.7 in)
2013
25.4 mm (1.0 in)
2014
16.8 mm (0.7 in)
2015
17.3 mm (0.7 in)
2016
15.2 mm (0.6 in)
2017
21.6 mm (0.9 in)
2018
11.2 mm (0.4 in)
2019
10.9 mm (0.4 in)
2020
20.8 mm (0.8 in)
2021
14.5 mm (0.6 in)
2022
11.7 mm (0.5 in)
2023
13.0 mm (0.5 in)
2024
21.8 mm (0.9 in)
2025
8.4 mm (0.33 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ft Duchesne, 1887 to 2025. The record is 104.1 mm (4.1 in) in 1905, marked on the chart; the median year is 26.0 mm (1.0 in).
Wettest five days (Rx5day) at Ft Duchesne by year
Year
Wettest five days (Rx5day)
1887
7.1 mm (0.28 in)
1888
26.4 mm (1.0 in)
1889
18.8 mm (0.7 in)
1890
15.3 mm (0.6 in)
1891
20.3 mm (0.8 in)
1892
25.9 mm (1.0 in)
1893
45.7 mm (1.8 in)
1902
15.2 mm (0.6 in)
1903
25.4 mm (1.0 in)
1904
63.2 mm (2.5 in)
1905
104.1 mm (4.1 in)
1906
27.9 mm (1.1 in)
1907
17.8 mm (0.7 in)
1908
35.6 mm (1.4 in)
1909
40.6 mm (1.6 in)
1910
20.0 mm (0.8 in)
1911
34.3 mm (1.4 in)
1912
22.8 mm (0.9 in)
1913
38.1 mm (1.5 in)
1914
15.2 mm (0.6 in)
1915
28.3 mm (1.1 in)
1916
24.5 mm (1.0 in)
1917
27.7 mm (1.1 in)
1918
29.8 mm (1.2 in)
1919
26.7 mm (1.1 in)
1920
15.0 mm (0.6 in)
1921
17.6 mm (0.7 in)
1922
19.9 mm (0.8 in)
1923
16.5 mm (0.6 in)
1924
8.4 mm (0.33 in)
1925
36.9 mm (1.5 in)
1926
10.1 mm (0.4 in)
1927
28.7 mm (1.1 in)
1928
26.0 mm (1.0 in)
1929
38.1 mm (1.5 in)
1930
36.7 mm (1.4 in)
1931
31.5 mm (1.2 in)
1932
26.2 mm (1.0 in)
1933
15.5 mm (0.6 in)
1934
13.2 mm (0.5 in)
1935
20.8 mm (0.8 in)
1936
27.7 mm (1.1 in)
1937
32.7 mm (1.3 in)
1938
43.4 mm (1.7 in)
1939
44.6 mm (1.8 in)
1940
20.9 mm (0.8 in)
1941
31.2 mm (1.2 in)
1942
22.1 mm (0.9 in)
1943
31.0 mm (1.2 in)
1944
29.8 mm (1.2 in)
1945
38.4 mm (1.5 in)
1946
24.7 mm (1.0 in)
1947
25.7 mm (1.0 in)
1948
16.0 mm (0.6 in)
1949
31.2 mm (1.2 in)
1950
20.4 mm (0.8 in)
1951
42.1 mm (1.7 in)
1952
42.1 mm (1.7 in)
1953
33.0 mm (1.3 in)
1954
33.9 mm (1.3 in)
1955
23.9 mm (0.9 in)
1956
21.4 mm (0.8 in)
1957
48.5 mm (1.9 in)
1958
15.0 mm (0.6 in)
1959
22.9 mm (0.9 in)
1960
39.0 mm (1.5 in)
1961
47.5 mm (1.9 in)
1962
21.6 mm (0.9 in)
1963
16.6 mm (0.7 in)
1964
39.6 mm (1.6 in)
1965
45.9 mm (1.8 in)
1966
33.6 mm (1.3 in)
1967
28.2 mm (1.1 in)
1968
27.4 mm (1.1 in)
1969
42.6 mm (1.7 in)
1970
53.6 mm (2.1 in)
1971
35.6 mm (1.4 in)
1972
32.0 mm (1.3 in)
1973
27.9 mm (1.1 in)
1974
11.9 mm (0.5 in)
1975
45.0 mm (1.8 in)
1976
13.8 mm (0.5 in)
1977
32.6 mm (1.3 in)
1978
80.5 mm (3.2 in)
1979
33.2 mm (1.3 in)
1980
56.5 mm (2.2 in)
1981
35.0 mm (1.4 in)
1982
40.9 mm (1.6 in)
1983
26.7 mm (1.1 in)
1984
31.7 mm (1.2 in)
1985
18.3 mm (0.7 in)
1986
23.2 mm (0.9 in)
1987
18.6 mm (0.7 in)
1988
13.7 mm (0.5 in)
1989
22.2 mm (0.9 in)
1990
26.1 mm (1.0 in)
1991
20.9 mm (0.8 in)
1992
32.7 mm (1.3 in)
1993
29.9 mm (1.2 in)
1994
63.0 mm (2.5 in)
1995
36.3 mm (1.4 in)
1996
13.2 mm (0.5 in)
1997
25.4 mm (1.0 in)
1998
15.7 mm (0.6 in)
1999
11.7 mm (0.5 in)
2000
18.5 mm (0.7 in)
2001
14.8 mm (0.6 in)
2002
26.5 mm (1.0 in)
2003
22.4 mm (0.9 in)
2004
45.5 mm (1.8 in)
2005
31.7 mm (1.2 in)
2006
33.3 mm (1.3 in)
2007
11.4 mm (0.4 in)
2008
15.7 mm (0.6 in)
2009
21.3 mm (0.8 in)
2010
3.3 mm (0.13 in)
2011
26.7 mm (1.1 in)
2012
32.5 mm (1.3 in)
2013
20.9 mm (0.8 in)
2014
18.1 mm (0.7 in)
2015
19.6 mm (0.8 in)
2016
15.5 mm (0.6 in)
2017
22.7 mm (0.9 in)
2018
21.1 mm (0.8 in)
2019
18.3 mm (0.7 in)
2020
25.1 mm (1.0 in)
2021
14.5 mm (0.6 in)
2022
16.8 mm (0.7 in)
2023
13.0 mm (0.5 in)
2024
25.4 mm (1.0 in)
2025
9.7 mm (0.38 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ft Duchesne, 1887 to 2025. The record is 133 days in 2002, marked on the chart; the median year is 48 days.
Longest dry spell (CDD) at Ft Duchesne by year
Year
Longest dry spell (CDD)
1887
25 days
1888
57 days
1889
37 days
1890
71 days
1891
37 days
1892
63 days
1893
51 days
1902
47 days
1903
32 days
1904
50 days
1905
41 days
1906
37 days
1907
44 days
1908
36 days
1909
36 days
1910
57 days
1911
74 days
1912
63 days
1913
96 days
1914
54 days
1915
60 days
1916
63 days
1917
28 days
1918
17 days
1919
19 days
1920
13 days
1921
17 days
1922
27 days
1923
18 days
1924
3 days
1925
14 days
1926
22 days
1927
26 days
1928
100 days
1929
51 days
1930
75 days
1931
52 days
1932
51 days
1933
35 days
1934
97 days
1935
110 days
1936
52 days
1937
55 days
1938
40 days
1939
77 days
1940
45 days
1941
25 days
1942
50 days
1943
29 days
1944
31 days
1945
37 days
1946
62 days
1947
39 days
1948
30 days
1949
50 days
1950
60 days
1951
50 days
1952
48 days
1953
73 days
1954
42 days
1955
104 days
1956
70 days
1957
32 days
1958
67 days
1959
43 days
1960
41 days
1961
61 days
1962
43 days
1963
74 days
1964
54 days
1965
32 days
1966
46 days
1967
53 days
1968
54 days
1969
53 days
1970
30 days
1971
56 days
1972
62 days
1973
29 days
1974
78 days
1975
30 days
1976
100 days
1977
30 days
1978
44 days
1979
66 days
1980
44 days
1981
56 days
1982
55 days
1983
40 days
1984
45 days
1985
42 days
1986
36 days
1987
38 days
1988
50 days
1989
66 days
1990
49 days
1991
82 days
1992
47 days
1993
48 days
1994
50 days
1995
62 days
1996
35 days
1997
32 days
1998
53 days
1999
98 days
2000
65 days
2001
49 days
2002
133 days
2003
56 days
2004
40 days
2005
33 days
2006
32 days
2007
85 days
2008
41 days
2009
62 days
2010
27 days
2011
31 days
2012
81 days
2013
26 days
2014
8 days
2015
18 days
2016
42 days
2017
83 days
2018
50 days
2019
45 days
2020
57 days
2021
51 days
2022
51 days
2023
59 days
2024
36 days
2025
17 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
86 years with a frost
Across 86 years with a frost, the median last spring frost at Ft Duchesne falls on 20 May and the median first autumn frost on 24 September, which leaves a median of 128 days between them.
In 1976 to 2024 the median growing season was 137 days. That is 16 days more than in 1888 to 1945.
Fitted over all years, the growing season changes by +2.4 days per decade at this station.
Frost dates and growing season at Ft Duchesne
Measure
Median, all years
Earliest period (1888 to 1945)
Recent period (1976 to 2024)
Recent against earliest
Fitted trend
Last spring frost
20 May
23 May
13 May
10 days earlier
-1.4 days per decade
First autumn frost
24 September
22 September
1 October
9 days later
+1.0 days per decade
Growing days
128 days
121 days
137 days
16 days more
+2.4 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
89 years, 1888 to 2023
A day with at least 19.4 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 63.8 mm (2.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Ft Duchesne: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
19.4 mm (0.8 in)
5 years
28.3 mm (1.1 in)
10 years
35.2 mm (1.4 in)
25 years
45.3 mm (1.8 in)
50 years
54.0 mm (2.1 in)
100 years
63.8 mm (2.5 in)
Longer than the 89 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, 89 years of values from 1888 to 2023.
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: 103.1 mm (4.1 in) in 1905; 77.7 mm (3.1 in) in 1978; 38.4 mm (1.5 in) in 1945.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Ft Duchesne, at 1981. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1981 ran 0.4 C (0.7 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Ft Duchesne, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1981
+0.4
+0.7
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 Ft Duchesne standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ft Duchesne 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.