Record envelope, standing records and threshold days for Darby (USC00242221), Montana, United States, with 129 years of record.
Key Facts for Darby
Darby (USC00242221) is a weather station in Montana, United States at 46.03 latitude and -114.18 longitude, 1,183 m (3,880 ft) above sea level.
The station reports from 1898 to 2026, 129 years of record.
1,464 records set at Darby still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Darby set a daily record precipitation of 22.9 mm (0.9 in) on 14 March 2026.
About the Station
Location: Montana, United States, 46.03 latitude, -114.18 longitude.
Elevation: 1,183 m (3,880 ft).
Period of record: 1898 to 2026, 129 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 Darby. 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 Darby, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.6 C (69.1 F)
-37.8 C (-36.0 F)
n/a
n/a
Feb
21.1 C (70.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-26.1 C (-15.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-16.7 C (1.9 F)
n/a
n/a
May
35.0 C (95.0 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
39.4 C (102.9 F)
-3.9 C (25.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-10.0 C (14.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-31.7 C (-25.1 F)
n/a
n/a
Dec
19.4 C (66.9 F)
-36.7 C (-34.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Darby still stand. 2018 holds the most, with 42.
Standing records at Darby by the year they were set
Year set
Standing records
1899
6
1914
14
1926
17
1927
12
1928
17
1929
16
1930
21
1931
18
1932
27
1933
25
1934
14
1935
26
1936
39
1937
26
1938
12
1939
17
1940
11
1941
14
1942
16
1943
16
1944
11
1945
10
1946
11
1947
11
1948
16
1949
27
1950
30
1951
16
1952
11
1953
14
1954
11
1955
24
1956
13
1957
16
1958
7
1959
14
1960
23
1961
14
1962
11
1963
16
1964
7
1965
22
1966
23
1967
13
1968
20
1969
21
1970
11
1971
9
1972
26
1973
15
1974
9
1975
16
1976
7
1977
12
1978
10
1979
9
1980
15
1981
10
1982
10
1983
26
1984
10
1985
24
1986
29
1987
16
1988
16
1989
7
1990
19
1991
10
1992
15
1993
28
1994
15
1995
14
1996
20
1997
9
1998
12
1999
18
2000
16
2001
12
2002
23
2003
31
2004
16
2005
23
2006
12
2007
7
2008
1
2009
2
2010
4
2011
4
2014
9
2015
15
2016
9
2017
4
2018
42
2019
9
2020
2
All-Time Record Progression
4 new records
4 all-time records were set at Darby between 13 July 2002 and 13 June 2017. Each dot is a new record.
When Darby set new all-time records
Date
Kind
Detail
2002-07-13
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
2003-08-16
Record high minimum temperature
Record high minimum temperature 20.6 C (69.1 F)
2004-07-18
Record high minimum temperature
Record high minimum temperature 21.1 C (70.0 F)
2017-06-13
Record daily precipitation
Record daily precipitation 76.2 mm (3.0 in)
Wettest Day of Each Month
Jun: 76.2 mm (3.0 in)
The wettest day on record for each calendar month at Darby. The most was 76.2 mm (3.0 in) on 13 June 2017.
Record daily precipitation for each month at Darby
Month
Record daily precipitation (mm)
Date
Jan
39.4 mm (1.6 in)
13 January 2006
Feb
31.2 mm (1.2 in)
1 February 1995
Mar
27.9 mm (1.1 in)
22 March 1973
Apr
43.2 mm (1.7 in)
6 April 1998
May
54.6 mm (2.1 in)
19 May 1938
Jun
76.2 mm (3.0 in)
13 June 2017
Jul
33.3 mm (1.3 in)
27 July 1970
Aug
44.5 mm (1.8 in)
20 August 1974
Sep
36.3 mm (1.4 in)
28 September 1940
Oct
26.4 mm (1.0 in)
2 October 1946
Nov
37.1 mm (1.5 in)
11 November 1995
Dec
34.0 mm (1.3 in)
10 December 1956
Period of Record Coverage
1898 to 2020
Complete yearUnder 90 percent of days
96 years of record at Darby, 1898 to 2020. 23 years have data for under 90 percent of days and are left out of rankings: 1898, 1899, 1914, 1926, 1963, 1964, 1974, 1982 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 69 complete years at Darby, 1928 to 2010. Blue stripes are years cooler than the station's own mean of 7.6 C (45.7 F); red stripes are warmer. The coolest year was 1955, at 5.6 C (42.1 F), and the warmest was 1998, at 9.1 C (48.4 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Darby as warming stripes, 1928 to 2010
Year
Annual mean temperature
Difference from the station mean
1928
8.5 C
+0.89 C
1929
7.8 C
+0.16 C
1930
7.1 C
-0.50 C
1931
8.0 C
+0.39 C
1933
7.2 C
-0.41 C
1934
8.9 C
+1.27 C
1935
6.6 C
-1.00 C
1936
6.8 C
-0.80 C
1937
6.5 C
-1.15 C
1938
7.6 C
-0.01 C
1939
8.2 C
+0.62 C
1940
8.2 C
+0.61 C
1941
7.9 C
+0.30 C
1942
6.7 C
-0.87 C
1943
6.4 C
-1.16 C
1944
7.0 C
-0.65 C
1945
7.4 C
-0.19 C
1946
7.6 C
+0.04 C
1947
7.5 C
-0.08 C
1948
6.2 C
-1.41 C
1949
6.3 C
-1.27 C
1950
6.6 C
-1.05 C
1951
6.0 C
-1.63 C
1952
6.8 C
-0.84 C
1953
8.1 C
+0.48 C
1954
7.2 C
-0.43 C
1955
5.6 C
-1.98 C
1956
6.9 C
-0.67 C
1957
6.9 C
-0.66 C
1958
8.6 C
+0.95 C
1959
7.2 C
-0.41 C
1960
7.1 C
-0.52 C
1961
7.9 C
+0.34 C
1962
7.4 C
-0.16 C
1965
7.7 C
+0.11 C
1966
8.9 C
+1.25 C
1967
8.3 C
+0.74 C
1968
8.0 C
+0.39 C
1969
7.6 C
-0.02 C
1970
7.6 C
+0.04 C
1971
7.3 C
-0.26 C
1972
7.5 C
-0.06 C
1973
8.0 C
+0.41 C
1975
6.3 C
-1.33 C
1976
7.6 C
-0.03 C
1977
7.7 C
+0.05 C
1978
7.1 C
-0.46 C
1980
7.6 C
0.00 C
1981
8.0 C
+0.38 C
1984
7.7 C
+0.12 C
1985
6.5 C
-1.07 C
1990
8.4 C
+0.83 C
1991
8.3 C
+0.71 C
1992
8.8 C
+1.17 C
1993
6.6 C
-1.00 C
1994
9.0 C
+1.37 C
1995
7.9 C
+0.25 C
1996
7.4 C
-0.18 C
1997
7.8 C
+0.19 C
1998
9.1 C
+1.51 C
1999
9.1 C
+1.48 C
2000
8.1 C
+0.53 C
2001
8.3 C
+0.68 C
2002
7.6 C
+0.01 C
2003
8.6 C
+0.99 C
2004
8.6 C
+0.99 C
2006
8.7 C
+1.06 C
2007
8.4 C
+0.82 C
2010
7.9 C
+0.34 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1928 to 2010. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 69 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Darby
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
1928 to 2010
69
Rise
Mean daily maximum
0.1 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1928 to 2010
69
Rise
Mean daily minimum
0.1 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1928 to 2010
69
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
1898 to 2026
Yearly extremes at Darby: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
2002
35.6 C (96.1 F)
96
Coldest night (TNn)
-37.8 C (-36.0 F)
1937
-26.1 C (-15.0 F)
96
Wettest day (Rx1day)
76.2 mm (3.0 in)
2017
27.0 mm (1.1 in)
100
Wettest five days (Rx5day)
95.6 mm (3.8 in)
1938
41.5 mm (1.6 in)
99
Longest dry spell (CDD)
84 days
1988
29 days
100
Hottest day (TXx)
The hottest day of the year at Darby, 1898 to 2026. The record is 40.6 C (105.1 F) in 2002, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Darby by year
Year
Hottest day (TXx)
1898
4.4 C (39.9 F)
1899
11.1 C (52.0 F)
1909
n/a
1910
n/a
1914
35.6 C (96.1 F)
1926
35.0 C (95.0 F)
1927
35.6 C (96.1 F)
1928
36.7 C (98.1 F)
1929
38.9 C (102.0 F)
1930
35.0 C (95.0 F)
1931
36.7 C (98.1 F)
1932
34.4 C (93.9 F)
1933
35.6 C (96.1 F)
1934
37.2 C (99.0 F)
1935
35.6 C (96.1 F)
1936
36.1 C (97.0 F)
1937
40.0 C (104.0 F)
1938
35.0 C (95.0 F)
1939
35.6 C (96.1 F)
1940
39.4 C (102.9 F)
1941
35.6 C (96.1 F)
1942
35.0 C (95.0 F)
1943
34.4 C (93.9 F)
1944
34.4 C (93.9 F)
1945
36.1 C (97.0 F)
1946
35.6 C (96.1 F)
1947
34.4 C (93.9 F)
1948
32.8 C (91.0 F)
1949
34.4 C (93.9 F)
1950
36.7 C (98.1 F)
1951
35.0 C (95.0 F)
1952
34.4 C (93.9 F)
1953
37.2 C (99.0 F)
1954
35.6 C (96.1 F)
1955
35.0 C (95.0 F)
1956
32.8 C (91.0 F)
1957
34.4 C (93.9 F)
1958
35.6 C (96.1 F)
1959
35.0 C (95.0 F)
1960
38.9 C (102.0 F)
1961
38.9 C (102.0 F)
1962
35.0 C (95.0 F)
1963
34.4 C (93.9 F)
1964
33.3 C (91.9 F)
1965
35.6 C (96.1 F)
1966
37.8 C (100.0 F)
1967
36.7 C (98.1 F)
1968
35.0 C (95.0 F)
1969
38.9 C (102.0 F)
1970
36.7 C (98.1 F)
1971
36.1 C (97.0 F)
1972
36.1 C (97.0 F)
1973
39.4 C (102.9 F)
1974
35.6 C (96.1 F)
1975
37.8 C (100.0 F)
1976
33.3 C (91.9 F)
1977
36.1 C (97.0 F)
1978
35.0 C (95.0 F)
1979
35.6 C (96.1 F)
1980
34.4 C (93.9 F)
1981
36.7 C (98.1 F)
1982
35.0 C (95.0 F)
1983
37.2 C (99.0 F)
1984
37.2 C (99.0 F)
1985
36.7 C (98.1 F)
1986
36.1 C (97.0 F)
1987
35.6 C (96.1 F)
1988
35.0 C (95.0 F)
1989
36.1 C (97.0 F)
1990
38.3 C (100.9 F)
1991
35.6 C (96.1 F)
1992
35.6 C (96.1 F)
1993
32.2 C (90.0 F)
1994
36.1 C (97.0 F)
1995
35.0 C (95.0 F)
1996
35.6 C (96.1 F)
1997
34.4 C (93.9 F)
1998
37.2 C (99.0 F)
1999
37.8 C (100.0 F)
2000
37.8 C (100.0 F)
2001
35.0 C (95.0 F)
2002
40.6 C (105.1 F)
2003
40.0 C (104.0 F)
2004
40.0 C (104.0 F)
2005
38.3 C (100.9 F)
2006
37.2 C (99.0 F)
2007
38.3 C (100.9 F)
2008
33.3 C (91.9 F)
2009
33.3 C (91.9 F)
2010
35.0 C (95.0 F)
2011
31.7 C (89.1 F)
2014
33.9 C (93.0 F)
2015
37.8 C (100.0 F)
2016
33.3 C (91.9 F)
2017
35.6 C (96.1 F)
2018
36.1 C (97.0 F)
2019
26.1 C (79.0 F)
2020
32.2 C (90.0 F)
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Darby, 1898 to 2026. The record is -37.8 C (-36.0 F) in 1937, marked on the chart; the median year is -26.1 C (-15.0 F).
Coldest night (TNn) at Darby by year
Year
Coldest night (TNn)
1898
-16.7 C (1.9 F)
1899
-33.3 C (-27.9 F)
1909
n/a
1910
n/a
1914
-4.4 C (24.1 F)
1926
-11.1 C (12.0 F)
1927
-30.0 C (-22.0 F)
1928
-26.1 C (-15.0 F)
1929
-27.2 C (-17.0 F)
1930
-32.2 C (-26.0 F)
1931
-25.0 C (-13.0 F)
1932
-33.3 C (-27.9 F)
1933
-37.2 C (-35.0 F)
1934
-21.1 C (-6.0 F)
1935
-32.8 C (-27.0 F)
1936
-36.7 C (-34.1 F)
1937
-37.8 C (-36.0 F)
1938
-28.9 C (-20.0 F)
1939
-32.8 C (-27.0 F)
1940
-25.6 C (-14.1 F)
1941
-22.8 C (-9.0 F)
1942
-31.7 C (-25.1 F)
1943
-28.9 C (-20.0 F)
1944
-29.4 C (-20.9 F)
1945
-26.1 C (-15.0 F)
1946
-16.1 C (3.0 F)
1947
-20.6 C (-5.1 F)
1948
-27.2 C (-17.0 F)
1949
-31.7 C (-25.1 F)
1950
-29.4 C (-20.9 F)
1951
-29.4 C (-20.9 F)
1952
-23.9 C (-11.0 F)
1953
-13.9 C (7.0 F)
1954
-26.1 C (-15.0 F)
1955
-27.8 C (-18.0 F)
1956
-27.8 C (-18.0 F)
1957
-35.6 C (-32.1 F)
1958
-16.1 C (3.0 F)
1959
-31.7 C (-25.1 F)
1960
-27.8 C (-18.0 F)
1961
-26.1 C (-15.0 F)
1962
-33.9 C (-29.0 F)
1963
-37.8 C (-36.0 F)
1964
-19.4 C (-2.9 F)
1965
-24.4 C (-11.9 F)
1966
-18.3 C (-0.9 F)
1967
-21.7 C (-7.1 F)
1968
-23.9 C (-11.0 F)
1969
-28.9 C (-20.0 F)
1970
-22.2 C (-8.0 F)
1971
-22.2 C (-8.0 F)
1972
-33.3 C (-27.9 F)
1973
-26.7 C (-16.1 F)
1974
-30.6 C (-23.1 F)
1975
-26.1 C (-15.0 F)
1976
-23.3 C (-9.9 F)
1977
-24.4 C (-11.9 F)
1978
-32.8 C (-27.0 F)
1979
-33.3 C (-27.9 F)
1980
-28.3 C (-18.9 F)
1981
-30.0 C (-22.0 F)
1982
-30.6 C (-23.1 F)
1983
-36.7 C (-34.1 F)
1984
-25.6 C (-14.1 F)
1985
-28.9 C (-20.0 F)
1986
-20.0 C (-4.0 F)
1987
-21.1 C (-6.0 F)
1988
-20.6 C (-5.1 F)
1989
-33.3 C (-27.9 F)
1990
-32.8 C (-27.0 F)
1991
-22.2 C (-8.0 F)
1992
-23.3 C (-9.9 F)
1993
-28.9 C (-20.0 F)
1994
-20.0 C (-4.0 F)
1995
-21.7 C (-7.1 F)
1996
-30.6 C (-23.1 F)
1997
-23.9 C (-11.0 F)
1998
-28.9 C (-20.0 F)
1999
-14.4 C (6.1 F)
2000
-20.6 C (-5.1 F)
2001
-20.6 C (-5.1 F)
2002
-21.1 C (-6.0 F)
2003
-23.9 C (-11.0 F)
2004
-30.6 C (-23.1 F)
2005
-25.6 C (-14.1 F)
2006
-23.9 C (-11.0 F)
2007
-22.8 C (-9.0 F)
2008
-28.3 C (-18.9 F)
2009
-27.2 C (-17.0 F)
2010
-25.6 C (-14.1 F)
2011
-23.9 C (-11.0 F)
2014
-26.1 C (-15.0 F)
2015
-20.6 C (-5.1 F)
2016
-23.3 C (-9.9 F)
2017
-26.1 C (-15.0 F)
2018
-21.1 C (-6.0 F)
2019
-25.0 C (-13.0 F)
2020
-17.8 C (0.0 F)
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Darby, 1898 to 2026. The record is 76.2 mm (3.0 in) in 2017, marked on the chart; the median year is 27.0 mm (1.1 in).
Wettest day (Rx1day) at Darby by year
Year
Wettest day (Rx1day)
1898
2.3 mm (0.09 in)
1899
30.5 mm (1.2 in)
1909
22.6 mm (0.9 in)
1910
15.2 mm (0.6 in)
1914
15.7 mm (0.6 in)
1926
20.3 mm (0.8 in)
1927
35.6 mm (1.4 in)
1928
31.8 mm (1.3 in)
1929
19.8 mm (0.8 in)
1930
15.7 mm (0.6 in)
1931
18.5 mm (0.7 in)
1932
14.0 mm (0.6 in)
1933
16.8 mm (0.7 in)
1934
18.0 mm (0.7 in)
1935
22.4 mm (0.9 in)
1936
21.3 mm (0.8 in)
1937
29.5 mm (1.2 in)
1938
54.6 mm (2.1 in)
1939
17.3 mm (0.7 in)
1940
36.3 mm (1.4 in)
1941
35.6 mm (1.4 in)
1942
22.1 mm (0.9 in)
1943
17.3 mm (0.7 in)
1944
27.2 mm (1.1 in)
1945
28.4 mm (1.1 in)
1946
27.2 mm (1.1 in)
1947
22.4 mm (0.9 in)
1948
21.6 mm (0.9 in)
1949
34.3 mm (1.4 in)
1950
23.9 mm (0.9 in)
1951
17.8 mm (0.7 in)
1952
34.3 mm (1.4 in)
1953
27.7 mm (1.1 in)
1954
19.6 mm (0.8 in)
1955
26.7 mm (1.1 in)
1956
34.0 mm (1.3 in)
1957
16.5 mm (0.6 in)
1958
28.2 mm (1.1 in)
1959
15.2 mm (0.6 in)
1960
11.9 mm (0.5 in)
1961
25.9 mm (1.0 in)
1962
36.1 mm (1.4 in)
1963
18.5 mm (0.7 in)
1964
28.4 mm (1.1 in)
1965
23.4 mm (0.9 in)
1966
22.1 mm (0.9 in)
1967
25.7 mm (1.0 in)
1968
23.9 mm (0.9 in)
1969
42.7 mm (1.7 in)
1970
33.3 mm (1.3 in)
1971
28.4 mm (1.1 in)
1972
16.5 mm (0.6 in)
1973
28.4 mm (1.1 in)
1974
44.5 mm (1.8 in)
1975
30.5 mm (1.2 in)
1976
21.8 mm (0.9 in)
1977
33.8 mm (1.3 in)
1978
31.8 mm (1.3 in)
1979
24.4 mm (1.0 in)
1980
33.3 mm (1.3 in)
1981
29.0 mm (1.1 in)
1982
27.7 mm (1.1 in)
1983
28.7 mm (1.1 in)
1984
31.0 mm (1.2 in)
1985
21.8 mm (0.9 in)
1986
23.4 mm (0.9 in)
1987
42.7 mm (1.7 in)
1988
27.7 mm (1.1 in)
1989
18.5 mm (0.7 in)
1990
35.1 mm (1.4 in)
1991
22.9 mm (0.9 in)
1992
27.4 mm (1.1 in)
1993
34.5 mm (1.4 in)
1994
27.9 mm (1.1 in)
1995
37.1 mm (1.5 in)
1996
32.3 mm (1.3 in)
1997
24.1 mm (0.9 in)
1998
43.2 mm (1.7 in)
1999
37.6 mm (1.5 in)
2000
12.7 mm (0.5 in)
2001
31.8 mm (1.3 in)
2002
37.3 mm (1.5 in)
2003
20.3 mm (0.8 in)
2004
28.4 mm (1.1 in)
2005
38.9 mm (1.5 in)
2006
39.4 mm (1.6 in)
2007
23.9 mm (0.9 in)
2008
14.5 mm (0.6 in)
2009
7.6 mm (0.30 in)
2010
30.5 mm (1.2 in)
2011
28.4 mm (1.1 in)
2014
30.5 mm (1.2 in)
2015
25.4 mm (1.0 in)
2016
25.4 mm (1.0 in)
2017
76.2 mm (3.0 in)
2018
35.6 mm (1.4 in)
2019
17.8 mm (0.7 in)
2020
15.2 mm (0.6 in)
2025
17.8 mm (0.7 in)
2026
22.9 mm (0.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Darby, 1898 to 2026. The record is 95.6 mm (3.8 in) in 1938, marked on the chart; the median year is 41.5 mm (1.6 in).
Wettest five days (Rx5day) at Darby by year
Year
Wettest five days (Rx5day)
1898
2.3 mm (0.09 in)
1899
38.1 mm (1.5 in)
1909
33.1 mm (1.3 in)
1910
n/a
1914
29.9 mm (1.2 in)
1926
36.8 mm (1.4 in)
1927
85.8 mm (3.4 in)
1928
39.7 mm (1.6 in)
1929
60.7 mm (2.4 in)
1930
37.4 mm (1.5 in)
1931
46.0 mm (1.8 in)
1932
25.4 mm (1.0 in)
1933
49.1 mm (1.9 in)
1934
34.1 mm (1.3 in)
1935
22.9 mm (0.9 in)
1936
47.3 mm (1.9 in)
1937
40.4 mm (1.6 in)
1938
95.6 mm (3.8 in)
1939
31.3 mm (1.2 in)
1940
57.6 mm (2.3 in)
1941
54.0 mm (2.1 in)
1942
60.2 mm (2.4 in)
1943
34.1 mm (1.3 in)
1944
38.7 mm (1.5 in)
1945
51.5 mm (2.0 in)
1946
90.4 mm (3.6 in)
1947
41.5 mm (1.6 in)
1948
29.2 mm (1.1 in)
1949
43.4 mm (1.7 in)
1950
54.2 mm (2.1 in)
1951
34.2 mm (1.3 in)
1952
43.0 mm (1.7 in)
1953
47.1 mm (1.9 in)
1954
38.2 mm (1.5 in)
1955
49.8 mm (2.0 in)
1956
61.7 mm (2.4 in)
1957
32.1 mm (1.3 in)
1958
50.5 mm (2.0 in)
1959
24.7 mm (1.0 in)
1960
23.9 mm (0.9 in)
1961
41.4 mm (1.6 in)
1962
61.5 mm (2.4 in)
1963
28.7 mm (1.1 in)
1964
37.6 mm (1.5 in)
1965
36.9 mm (1.5 in)
1966
39.3 mm (1.5 in)
1967
45.3 mm (1.8 in)
1968
35.1 mm (1.4 in)
1969
48.3 mm (1.9 in)
1970
52.8 mm (2.1 in)
1971
58.4 mm (2.3 in)
1972
43.8 mm (1.7 in)
1973
38.8 mm (1.5 in)
1974
44.5 mm (1.8 in)
1975
50.6 mm (2.0 in)
1976
28.2 mm (1.1 in)
1977
49.4 mm (1.9 in)
1978
42.0 mm (1.7 in)
1979
30.8 mm (1.2 in)
1980
50.9 mm (2.0 in)
1981
39.2 mm (1.5 in)
1982
46.9 mm (1.8 in)
1983
37.6 mm (1.5 in)
1984
32.8 mm (1.3 in)
1985
50.2 mm (2.0 in)
1986
68.7 mm (2.7 in)
1987
46.5 mm (1.8 in)
1988
55.6 mm (2.2 in)
1989
25.3 mm (1.0 in)
1990
37.1 mm (1.5 in)
1991
39.2 mm (1.5 in)
1992
48.2 mm (1.9 in)
1993
47.2 mm (1.9 in)
1994
36.1 mm (1.4 in)
1995
60.7 mm (2.4 in)
1996
76.1 mm (3.0 in)
1997
48.6 mm (1.9 in)
1998
62.8 mm (2.5 in)
1999
48.0 mm (1.9 in)
2000
30.0 mm (1.2 in)
2001
37.1 mm (1.5 in)
2002
42.1 mm (1.7 in)
2003
31.7 mm (1.2 in)
2004
50.6 mm (2.0 in)
2005
45.2 mm (1.8 in)
2006
26.0 mm (1.0 in)
2007
8.6 mm (0.34 in)
2008
19.0 mm (0.7 in)
2009
7.6 mm (0.30 in)
2010
32.8 mm (1.3 in)
2011
34.5 mm (1.4 in)
2014
54.1 mm (2.1 in)
2015
25.4 mm (1.0 in)
2016
34.6 mm (1.4 in)
2017
76.2 mm (3.0 in)
2018
82.3 mm (3.2 in)
2019
30.5 mm (1.2 in)
2020
15.5 mm (0.6 in)
2025
53.3 mm (2.1 in)
2026
45.8 mm (1.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Darby, 1898 to 2026. The record is 84 days in 1988, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at Darby by year
Year
Longest dry spell (CDD)
1898
45 days
1899
17 days
1909
19 days
1910
2 days
1914
35 days
1926
29 days
1927
30 days
1928
28 days
1929
27 days
1930
23 days
1931
30 days
1932
22 days
1933
26 days
1934
34 days
1935
41 days
1936
28 days
1937
33 days
1938
24 days
1939
35 days
1940
32 days
1941
35 days
1942
44 days
1943
24 days
1944
36 days
1945
23 days
1946
21 days
1947
18 days
1948
29 days
1949
27 days
1950
23 days
1951
18 days
1952
29 days
1953
41 days
1954
25 days
1955
52 days
1956
27 days
1957
23 days
1958
22 days
1959
35 days
1960
25 days
1961
46 days
1962
19 days
1963
30 days
1964
20 days
1965
27 days
1966
23 days
1967
30 days
1968
30 days
1969
65 days
1970
29 days
1971
37 days
1972
31 days
1973
43 days
1974
29 days
1975
16 days
1976
27 days
1977
28 days
1978
33 days
1979
36 days
1980
21 days
1981
33 days
1982
14 days
1983
24 days
1984
34 days
1985
38 days
1986
21 days
1987
80 days
1988
84 days
1989
17 days
1990
25 days
1991
32 days
1992
28 days
1993
21 days
1994
28 days
1995
16 days
1996
27 days
1997
18 days
1998
37 days
1999
27 days
2000
36 days
2001
36 days
2002
26 days
2003
29 days
2004
27 days
2005
30 days
2006
33 days
2007
17 days
2008
38 days
2009
23 days
2010
37 days
2011
40 days
2014
32 days
2015
34 days
2016
55 days
2017
47 days
2018
63 days
2019
38 days
2020
8 days
2025
8 days
2026
25 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
69 years with a frost
Across 69 years with a frost, the median last spring frost at Darby falls on 29 May and the median first autumn frost on 11 September, which leaves a median of 104 days between them.
In 1970 to 2010 the median growing season was 108 days. That is 6 days more than in 1928 to 1958.
Fitted over all years, the growing season changes by +2.1 days per decade at this station.
Frost dates and growing season at Darby
Measure
Median, all years
Earliest period (1928 to 1958)
Recent period (1970 to 2010)
Recent against earliest
Fitted trend
Last spring frost
29 May
2 June
29 May
4 days earlier
-0.8 days per decade
First autumn frost
11 September
10 September
13 September
3 days later
+1.3 days per decade
Growing days
104 days
102 days
108 days
6 days more
+2.1 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
79 years, 1909 to 2016
A day with at least 26.3 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 48.7 mm (1.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Darby: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
26.3 mm (1.0 in)
5 years
33.7 mm (1.3 in)
10 years
37.9 mm (1.5 in)
25 years
42.7 mm (1.7 in)
50 years
45.9 mm (1.8 in)
100 years
48.7 mm (1.9 in)
Longer than the 79 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, 79 years of values from 1909 to 2016.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 54.6 mm (2.1 in) in 1938; 44.5 mm (1.8 in) in 1974; 43.2 mm (1.7 in) in 1998.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Darby, at 1975. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1975 ran 0.3 C (0.5 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Darby, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1975
-0.3
-0.5
possible
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 Darby standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Darby 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.