Record envelope, standing records and threshold days for Bigfork 13 S (USC00240755), Montana, United States, with 89 years of record.
Key Facts for Bigfork 13 S
Bigfork 13 S (USC00240755) is a weather station in Montana, United States at 47.88 latitude and -114.03 longitude, 908 m (2,979 ft) above sea level.
The station reports from 1938 to 2026, 89 years of record.
1,464 records set at Bigfork 13 S still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Bigfork 13 S set a daily record high minimum temperature of 16.7 C (62.1 F) on 6 July 2026.
About the Station
Location: Montana, United States, 47.88 latitude, -114.03 longitude.
Elevation: 908 m (2,979 ft).
Period of record: 1938 to 2026, 89 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
3 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 Bigfork 13 S. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Bigfork 13 S, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.8 C (64.0 F)
-28.9 C (-20.0 F)
11.7 C (53.1 F)
-11.1 C (12.0 F)
Feb
16.7 C (62.1 F)
-29.4 C (-20.9 F)
10.6 C (51.1 F)
-8.9 C (16.0 F)
Mar
20.6 C (69.1 F)
-23.9 C (-11.0 F)
18.3 C (64.9 F)
-7.8 C (18.0 F)
Apr
29.4 C (84.9 F)
-11.7 C (10.9 F)
22.2 C (72.0 F)
-1.7 C (28.9 F)
May
32.2 C (90.0 F)
-6.1 C (21.0 F)
28.3 C (82.9 F)
0.6 C (33.1 F)
Jun
35.6 C (96.1 F)
-0.6 C (30.9 F)
27.8 C (82.0 F)
2.8 C (37.0 F)
Jul
37.8 C (100.0 F)
-1.1 C (30.0 F)
33.3 C (91.9 F)
10.0 C (50.0 F)
Aug
38.3 C (100.9 F)
1.7 C (35.1 F)
23.9 C (75.0 F)
8.9 C (48.0 F)
Sep
35.0 C (95.0 F)
-5.6 C (21.9 F)
17.2 C (63.0 F)
12.2 C (54.0 F)
Oct
27.8 C (82.0 F)
-13.3 C (8.1 F)
n/a
n/a
Nov
20.0 C (68.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Dec
16.1 C (61.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Bigfork 13 S still stand. 1950 holds the most, with 38.
Standing records at Bigfork 13 S by the year they were set
Year set
Standing records
1938
6
1939
37
1940
22
1941
19
1942
16
1943
23
1944
29
1945
10
1946
10
1947
12
1948
13
1949
32
1950
38
1951
29
1952
14
1953
21
1954
20
1955
30
1956
18
1957
22
1958
14
1959
18
1960
26
1961
26
1962
18
1963
20
1964
18
1965
33
1966
21
1967
20
1968
18
1969
10
1970
17
1971
17
1972
26
1973
17
1974
20
1975
24
1976
17
1977
20
1978
33
1979
7
1980
17
1981
5
1982
12
1983
13
1984
10
1985
33
1986
10
1987
10
1988
10
1989
18
1990
15
1991
12
1992
14
1993
11
1994
16
1995
18
1996
12
1997
5
1998
14
1999
20
2000
5
2001
7
2002
20
2003
17
2004
10
2005
11
2006
8
2007
15
2008
14
2009
13
2010
9
2011
10
2012
11
2013
5
2014
12
2015
13
2016
6
2017
10
2018
4
2019
10
2020
17
2021
26
2022
21
2023
17
2024
10
2025
14
2026
13
All-Time Record Progression
5 new records
5 all-time records were set at Bigfork 13 S between 31 December 1978 and 26 July 1998. Each dot is a new record.
When Bigfork 13 S set new all-time records
Date
Kind
Detail
1978-12-31
Record low minimum temperature
Record low minimum temperature -32.8 C (-27.0 F)
1989-02-02
Record low maximum temperature
Record low maximum temperature -23.3 C (-9.9 F)
1996-11-19
Record daily snowfall
Record daily snowfall 30.5 cm (12.0 in)
1998-07-25
Record high minimum temperature
Record high minimum temperature 22.2 C (72.0 F)
1998-07-26
Record high minimum temperature
Record high minimum temperature 23.9 C (75.0 F)
Wettest Day of Each Month
May: 127.0 mm (5.0 in)
The wettest day on record for each calendar month at Bigfork 13 S. The most was 127.0 mm (5.0 in) on 21 May 1944.
Record daily precipitation for each month at Bigfork 13 S
Month
Record daily precipitation (mm)
Date
Jan
31.5 mm (1.2 in)
24 January 1981
Feb
23.9 mm (0.9 in)
26 February 1948
Mar
33.0 mm (1.3 in)
30 March 1981
Apr
43.9 mm (1.7 in)
30 April 1951
May
127.0 mm (5.0 in)
21 May 1944
Jun
71.1 mm (2.8 in)
2 June 2005
Jul
90.2 mm (3.6 in)
22 July 1987
Aug
45.7 mm (1.8 in)
22 August 1947
Sep
52.1 mm (2.1 in)
12 September 1985
Oct
64.0 mm (2.5 in)
2 October 1946
Nov
36.1 mm (1.4 in)
2 November 2022
Dec
28.4 mm (1.1 in)
3 December 1941
Period of Record Coverage
1938 to 2026
Complete yearUnder 90 percent of days
89 years of record at Bigfork 13 S, 1938 to 2026. 26 years have data for under 90 percent of days and are left out of rankings: 1938, 1971, 1972, 1973, 1974, 1975, 1976, 1977 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 61 complete years at Bigfork 13 S, 1940 to 2025. Blue stripes are years cooler than the station's own mean of 7.9 C (46.3 F); red stripes are warmer. The coolest year was 1985, at 5.9 C (42.5 F), and the warmest was 2025, at 9.3 C (48.8 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Bigfork 13 S as warming stripes, 1940 to 2025
Year
Annual mean temperature
Difference from the station mean
1940
8.8 C
+0.90 C
1941
8.9 C
+0.95 C
1942
7.4 C
-0.57 C
1943
7.4 C
-0.51 C
1944
8.8 C
+0.89 C
1945
8.4 C
+0.47 C
1946
8.2 C
+0.22 C
1947
8.0 C
+0.08 C
1948
7.1 C
-0.80 C
1949
7.1 C
-0.82 C
1950
6.9 C
-1.03 C
1951
6.5 C
-1.43 C
1952
8.2 C
+0.26 C
1953
9.1 C
+1.21 C
1954
7.4 C
-0.58 C
1955
6.3 C
-1.60 C
1956
7.5 C
-0.47 C
1957
7.4 C
-0.52 C
1958
8.8 C
+0.83 C
1959
6.9 C
-0.99 C
1960
7.5 C
-0.46 C
1961
8.4 C
+0.44 C
1962
7.8 C
-0.11 C
1963
7.9 C
0.00 C
1964
6.8 C
-1.14 C
1965
7.2 C
-0.75 C
1966
7.7 C
-0.21 C
1967
8.7 C
+0.75 C
1968
7.5 C
-0.44 C
1970
7.6 C
-0.32 C
1982
6.9 C
-1.05 C
1983
7.8 C
-0.17 C
1985
5.9 C
-2.08 C
1986
7.5 C
-0.46 C
1987
8.3 C
+0.38 C
1988
8.7 C
+0.80 C
1989
7.1 C
-0.85 C
1990
7.9 C
-0.04 C
1991
7.8 C
-0.14 C
1993
6.8 C
-1.13 C
1995
8.0 C
+0.07 C
1996
6.7 C
-1.20 C
1999
9.3 C
+1.34 C
2001
8.5 C
+0.55 C
2002
7.9 C
-0.03 C
2004
8.9 C
+0.94 C
2005
8.3 C
+0.33 C
2006
9.2 C
+1.29 C
2007
9.3 C
+1.38 C
2008
7.9 C
-0.05 C
2009
8.0 C
+0.10 C
2010
8.2 C
+0.26 C
2012
9.0 C
+1.09 C
2017
8.1 C
+0.20 C
2019
7.3 C
-0.59 C
2020
8.9 C
+0.98 C
2021
9.0 C
+1.07 C
2022
7.9 C
-0.04 C
2023
8.8 C
+0.84 C
2024
8.8 C
+0.84 C
2025
9.3 C
+1.38 C
The annual mean temperature here has risen by 0.10 C (0.03 to 0.18) per decade over 1940 to 2025. In Fahrenheit: 0.18 F (0.05 to 0.32) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Bigfork 13 S
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.10 C (0.03 to 0.18) per decade
0.18 F (0.05 to 0.32) per decade
1940 to 2025
61
Rise
Mean daily maximum
-0.02 C (-0.11 to 0.08) per decade
-0.03 F (-0.20 to 0.14) per decade
1940 to 2025
61
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
1940 to 2025
61
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
1938 to 2026
Yearly extremes at Bigfork 13 S: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1961
33.9 C (93.0 F)
89
Coldest night (TNn)
-32.8 C (-27.0 F)
1978
-20.0 C (-4.0 F)
89
Wettest day (Rx1day)
127.0 mm (5.0 in)
1944
33.0 mm (1.3 in)
89
Wettest five days (Rx5day)
162.3 mm (6.4 in)
1944
52.8 mm (2.1 in)
85
Longest dry spell (CDD)
75 days
1967
23 days
89
Hottest day (TXx)
The hottest day of the year at Bigfork 13 S, 1938 to 2026. The record is 38.3 C (100.9 F) in 1961, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Bigfork 13 S by year
Year
Hottest day (TXx)
1938
15.0 C (59.0 F)
1939
36.7 C (98.1 F)
1940
37.8 C (100.0 F)
1941
37.2 C (99.0 F)
1942
35.0 C (95.0 F)
1943
33.9 C (93.0 F)
1944
35.0 C (95.0 F)
1945
35.6 C (96.1 F)
1946
35.0 C (95.0 F)
1947
32.8 C (91.0 F)
1948
31.7 C (89.1 F)
1949
35.6 C (96.1 F)
1950
33.3 C (91.9 F)
1951
33.9 C (93.0 F)
1952
35.0 C (95.0 F)
1953
37.2 C (99.0 F)
1954
33.3 C (91.9 F)
1955
35.0 C (95.0 F)
1956
34.4 C (93.9 F)
1957
32.8 C (91.0 F)
1958
35.0 C (95.0 F)
1959
35.6 C (96.1 F)
1960
37.8 C (100.0 F)
1961
38.3 C (100.9 F)
1962
33.9 C (93.0 F)
1963
35.0 C (95.0 F)
1964
34.4 C (93.9 F)
1965
33.9 C (93.0 F)
1966
32.2 C (90.0 F)
1967
37.2 C (99.0 F)
1968
35.0 C (95.0 F)
1969
37.8 C (100.0 F)
1970
35.6 C (96.1 F)
1971
36.1 C (97.0 F)
1972
33.3 C (91.9 F)
1973
31.1 C (88.0 F)
1974
34.4 C (93.9 F)
1975
36.7 C (98.1 F)
1976
31.7 C (89.1 F)
1977
33.9 C (93.0 F)
1978
34.4 C (93.9 F)
1979
33.3 C (91.9 F)
1980
26.7 C (80.1 F)
1981
31.1 C (88.0 F)
1982
30.0 C (86.0 F)
1983
33.3 C (91.9 F)
1984
33.3 C (91.9 F)
1985
34.4 C (93.9 F)
1986
31.1 C (88.0 F)
1987
31.7 C (89.1 F)
1988
32.8 C (91.0 F)
1989
30.0 C (86.0 F)
1990
32.8 C (91.0 F)
1991
32.2 C (90.0 F)
1992
33.3 C (91.9 F)
1993
30.0 C (86.0 F)
1994
35.0 C (95.0 F)
1995
30.0 C (86.0 F)
1996
31.7 C (89.1 F)
1997
29.4 C (84.9 F)
1998
35.6 C (96.1 F)
1999
33.9 C (93.0 F)
2000
33.9 C (93.0 F)
2001
32.8 C (91.0 F)
2002
32.8 C (91.0 F)
2003
36.1 C (97.0 F)
2004
33.3 C (91.9 F)
2005
33.3 C (91.9 F)
2006
34.4 C (93.9 F)
2007
35.6 C (96.1 F)
2008
35.0 C (95.0 F)
2009
32.2 C (90.0 F)
2010
32.2 C (90.0 F)
2011
32.8 C (91.0 F)
2012
31.1 C (88.0 F)
2013
33.9 C (93.0 F)
2014
32.2 C (90.0 F)
2015
34.4 C (93.9 F)
2016
32.2 C (90.0 F)
2017
32.8 C (91.0 F)
2018
30.6 C (87.1 F)
2019
32.8 C (91.0 F)
2020
35.6 C (96.1 F)
2021
36.1 C (97.0 F)
2022
36.7 C (98.1 F)
2023
36.7 C (98.1 F)
2024
34.4 C (93.9 F)
2025
32.8 C (91.0 F)
2026
33.3 C (91.9 F)
Coldest night (TNn)
The coldest night of the year at Bigfork 13 S, 1938 to 2026. The record is -32.8 C (-27.0 F) in 1978, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Bigfork 13 S by year
Year
Coldest night (TNn)
1938
-12.8 C (9.0 F)
1939
-24.4 C (-11.9 F)
1940
-18.9 C (-2.0 F)
1941
-21.7 C (-7.1 F)
1942
-22.2 C (-8.0 F)
1943
-27.8 C (-18.0 F)
1944
-16.7 C (1.9 F)
1945
-20.0 C (-4.0 F)
1946
-17.8 C (0.0 F)
1947
-15.0 C (5.0 F)
1948
-18.3 C (-0.9 F)
1949
-25.6 C (-14.1 F)
1950
-28.9 C (-20.0 F)
1951
-23.9 C (-11.0 F)
1952
-17.8 C (0.0 F)
1953
-10.6 C (12.9 F)
1954
-24.4 C (-11.9 F)
1955
-21.7 C (-7.1 F)
1956
-27.2 C (-17.0 F)
1957
-27.2 C (-17.0 F)
1958
-15.0 C (5.0 F)
1959
-22.2 C (-8.0 F)
1960
-23.9 C (-11.0 F)
1961
-20.0 C (-4.0 F)
1962
-22.2 C (-8.0 F)
1963
-26.1 C (-15.0 F)
1964
-27.2 C (-17.0 F)
1965
-17.8 C (0.0 F)
1966
-17.2 C (1.0 F)
1967
-16.7 C (1.9 F)
1968
-29.4 C (-20.9 F)
1969
-19.4 C (-2.9 F)
1970
-15.0 C (5.0 F)
1971
-18.9 C (-2.0 F)
1972
-26.1 C (-15.0 F)
1973
-23.3 C (-9.9 F)
1974
-23.3 C (-9.9 F)
1975
-21.1 C (-6.0 F)
1976
-17.8 C (0.0 F)
1977
-17.8 C (0.0 F)
1978
-32.8 C (-27.0 F)
1979
-13.9 C (7.0 F)
1980
-20.6 C (-5.1 F)
1981
-20.6 C (-5.1 F)
1982
-21.1 C (-6.0 F)
1983
-23.3 C (-9.9 F)
1984
-16.7 C (1.9 F)
1985
-23.9 C (-11.0 F)
1986
-17.8 C (0.0 F)
1987
-14.4 C (6.1 F)
1988
-16.1 C (3.0 F)
1989
-29.4 C (-20.9 F)
1990
-25.6 C (-14.1 F)
1991
-15.6 C (3.9 F)
1992
-18.3 C (-0.9 F)
1993
-20.0 C (-4.0 F)
1994
-22.8 C (-9.0 F)
1995
-17.2 C (1.0 F)
1996
-25.0 C (-13.0 F)
1997
-17.8 C (0.0 F)
1998
-21.7 C (-7.1 F)
1999
-17.8 C (0.0 F)
2000
-13.3 C (8.1 F)
2001
-12.2 C (10.0 F)
2002
-16.1 C (3.0 F)
2003
-13.9 C (7.0 F)
2004
-20.0 C (-4.0 F)
2005
-18.3 C (-0.9 F)
2006
-20.6 C (-5.1 F)
2007
-15.6 C (3.9 F)
2008
-21.1 C (-6.0 F)
2009
-19.4 C (-2.9 F)
2010
-16.7 C (1.9 F)
2011
-20.0 C (-4.0 F)
2012
-10.6 C (12.9 F)
2013
-20.0 C (-4.0 F)
2014
-21.1 C (-6.0 F)
2015
-10.6 C (12.9 F)
2016
-18.9 C (-2.0 F)
2017
-20.0 C (-4.0 F)
2018
-17.2 C (1.0 F)
2019
-20.6 C (-5.1 F)
2020
-12.8 C (9.0 F)
2021
-20.6 C (-5.1 F)
2022
-22.8 C (-9.0 F)
2023
-20.0 C (-4.0 F)
2024
-26.7 C (-16.1 F)
2025
-19.4 C (-2.9 F)
2026
-11.1 C (12.0 F)
Wettest day (Rx1day)
The wettest day of the year at Bigfork 13 S, 1938 to 2026. The record is 127.0 mm (5.0 in) in 1944, marked on the chart; the median year is 33.0 mm (1.3 in).
Wettest day (Rx1day) at Bigfork 13 S by year
Year
Wettest day (Rx1day)
1938
14.5 mm (0.6 in)
1939
25.9 mm (1.0 in)
1940
18.8 mm (0.7 in)
1941
29.0 mm (1.1 in)
1942
32.0 mm (1.3 in)
1943
31.8 mm (1.3 in)
1944
127.0 mm (5.0 in)
1945
27.4 mm (1.1 in)
1946
64.0 mm (2.5 in)
1947
55.9 mm (2.2 in)
1948
34.5 mm (1.4 in)
1949
29.0 mm (1.1 in)
1950
31.2 mm (1.2 in)
1951
43.9 mm (1.7 in)
1952
22.9 mm (0.9 in)
1953
16.5 mm (0.6 in)
1954
33.5 mm (1.3 in)
1955
25.9 mm (1.0 in)
1956
38.1 mm (1.5 in)
1957
19.8 mm (0.8 in)
1958
59.2 mm (2.3 in)
1959
30.5 mm (1.2 in)
1960
39.9 mm (1.6 in)
1961
32.0 mm (1.3 in)
1962
26.2 mm (1.0 in)
1963
55.9 mm (2.2 in)
1964
55.9 mm (2.2 in)
1965
45.7 mm (1.8 in)
1966
63.5 mm (2.5 in)
1967
22.9 mm (0.9 in)
1968
34.0 mm (1.3 in)
1969
43.9 mm (1.7 in)
1970
40.6 mm (1.6 in)
1971
35.8 mm (1.4 in)
1972
28.7 mm (1.1 in)
1973
39.6 mm (1.6 in)
1974
25.4 mm (1.0 in)
1975
37.1 mm (1.5 in)
1976
23.9 mm (0.9 in)
1977
21.6 mm (0.9 in)
1978
54.4 mm (2.1 in)
1979
25.7 mm (1.0 in)
1980
48.3 mm (1.9 in)
1981
33.0 mm (1.3 in)
1982
57.2 mm (2.3 in)
1983
24.9 mm (1.0 in)
1984
24.6 mm (1.0 in)
1985
52.6 mm (2.1 in)
1986
40.4 mm (1.6 in)
1987
90.2 mm (3.6 in)
1988
27.7 mm (1.1 in)
1989
35.6 mm (1.4 in)
1990
22.1 mm (0.9 in)
1991
30.5 mm (1.2 in)
1992
42.4 mm (1.7 in)
1993
26.7 mm (1.1 in)
1994
23.1 mm (0.9 in)
1995
49.3 mm (1.9 in)
1996
26.4 mm (1.0 in)
1997
47.8 mm (1.9 in)
1998
47.0 mm (1.9 in)
1999
20.3 mm (0.8 in)
2000
20.3 mm (0.8 in)
2001
44.5 mm (1.8 in)
2002
38.1 mm (1.5 in)
2003
24.4 mm (1.0 in)
2004
20.3 mm (0.8 in)
2005
71.1 mm (2.8 in)
2006
38.1 mm (1.5 in)
2007
35.6 mm (1.4 in)
2008
33.0 mm (1.3 in)
2009
25.1 mm (1.0 in)
2010
34.8 mm (1.4 in)
2011
41.1 mm (1.6 in)
2012
42.7 mm (1.7 in)
2013
39.6 mm (1.6 in)
2014
37.3 mm (1.5 in)
2015
13.7 mm (0.5 in)
2016
43.2 mm (1.7 in)
2017
29.2 mm (1.1 in)
2018
28.4 mm (1.1 in)
2019
19.3 mm (0.8 in)
2020
27.9 mm (1.1 in)
2021
25.9 mm (1.0 in)
2022
51.6 mm (2.0 in)
2023
40.6 mm (1.6 in)
2024
29.2 mm (1.1 in)
2025
30.7 mm (1.2 in)
2026
31.5 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Bigfork 13 S, 1938 to 2026. The record is 162.3 mm (6.4 in) in 1944, marked on the chart; the median year is 52.8 mm (2.1 in).
Wettest five days (Rx5day) at Bigfork 13 S by year
Year
Wettest five days (Rx5day)
1938
20.3 mm (0.8 in)
1939
60.1 mm (2.4 in)
1940
37.3 mm (1.5 in)
1941
47.8 mm (1.9 in)
1942
58.3 mm (2.3 in)
1943
48.7 mm (1.9 in)
1944
162.3 mm (6.4 in)
1945
58.5 mm (2.3 in)
1946
64.0 mm (2.5 in)
1947
83.1 mm (3.3 in)
1948
62.8 mm (2.5 in)
1949
36.4 mm (1.4 in)
1950
45.7 mm (1.8 in)
1951
91.2 mm (3.6 in)
1952
46.2 mm (1.8 in)
1953
40.6 mm (1.6 in)
1954
45.5 mm (1.8 in)
1955
33.3 mm (1.3 in)
1956
55.9 mm (2.2 in)
1957
40.4 mm (1.6 in)
1958
60.5 mm (2.4 in)
1959
60.9 mm (2.4 in)
1960
79.7 mm (3.1 in)
1961
65.3 mm (2.6 in)
1962
51.7 mm (2.0 in)
1963
56.7 mm (2.2 in)
1964
83.3 mm (3.3 in)
1965
82.5 mm (3.2 in)
1966
96.3 mm (3.8 in)
1967
30.2 mm (1.2 in)
1968
44.4 mm (1.7 in)
1969
102.1 mm (4.0 in)
1970
52.8 mm (2.1 in)
1971
46.2 mm (1.8 in)
1972
43.5 mm (1.7 in)
1973
50.3 mm (2.0 in)
1974
34.6 mm (1.4 in)
1975
66.3 mm (2.6 in)
1976
23.9 mm (0.9 in)
1977
31.4 mm (1.2 in)
1978
55.7 mm (2.2 in)
1979
44.2 mm (1.7 in)
1980
124.8 mm (4.9 in)
1981
45.0 mm (1.8 in)
1982
81.1 mm (3.2 in)
1983
65.0 mm (2.6 in)
1984
45.7 mm (1.8 in)
1985
100.1 mm (3.9 in)
1986
47.5 mm (1.9 in)
1987
130.8 mm (5.1 in)
1988
58.3 mm (2.3 in)
1989
63.8 mm (2.5 in)
1990
50.0 mm (2.0 in)
1991
37.6 mm (1.5 in)
1992
46.0 mm (1.8 in)
1993
56.4 mm (2.2 in)
1994
36.6 mm (1.4 in)
1995
67.9 mm (2.7 in)
1996
47.3 mm (1.9 in)
1997
69.4 mm (2.7 in)
1998
58.0 mm (2.3 in)
1999
42.4 mm (1.7 in)
2000
30.0 mm (1.2 in)
2001
53.1 mm (2.1 in)
2002
59.7 mm (2.4 in)
2003
39.9 mm (1.6 in)
2004
31.5 mm (1.2 in)
2005
137.9 mm (5.4 in)
2006
71.9 mm (2.8 in)
2007
58.5 mm (2.3 in)
2008
76.2 mm (3.0 in)
2009
41.9 mm (1.6 in)
2010
63.8 mm (2.5 in)
2011
67.8 mm (2.7 in)
2012
62.8 mm (2.5 in)
2013
56.4 mm (2.2 in)
2014
80.0 mm (3.1 in)
2015
34.8 mm (1.4 in)
2016
50.6 mm (2.0 in)
2017
10.9 mm (0.4 in)
2018
5.3 mm (0.21 in)
2019
10.1 mm (0.4 in)
2020
n/a
2021
n/a
2022
n/a
2023
25.1 mm (1.0 in)
2024
11.9 mm (0.5 in)
2025
n/a
2026
13.3 mm (0.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Bigfork 13 S, 1938 to 2026. The record is 75 days in 1967, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Bigfork 13 S by year
Year
Longest dry spell (CDD)
1938
12 days
1939
28 days
1940
25 days
1941
23 days
1942
23 days
1943
16 days
1944
30 days
1945
20 days
1946
21 days
1947
14 days
1948
29 days
1949
22 days
1950
14 days
1951
27 days
1952
30 days
1953
21 days
1954
18 days
1955
50 days
1956
23 days
1957
27 days
1958
24 days
1959
35 days
1960
18 days
1961
31 days
1962
21 days
1963
39 days
1964
25 days
1965
30 days
1966
20 days
1967
75 days
1968
27 days
1969
56 days
1970
26 days
1971
23 days
1972
14 days
1973
27 days
1974
19 days
1975
16 days
1976
23 days
1977
34 days
1978
52 days
1979
25 days
1980
23 days
1981
26 days
1982
19 days
1983
21 days
1984
33 days
1985
33 days
1986
19 days
1987
28 days
1988
20 days
1989
16 days
1990
34 days
1991
26 days
1992
18 days
1993
26 days
1994
32 days
1995
17 days
1996
32 days
1997
17 days
1998
25 days
1999
19 days
2000
34 days
2001
31 days
2002
26 days
2003
45 days
2004
19 days
2005
27 days
2006
32 days
2007
23 days
2008
26 days
2009
25 days
2010
16 days
2011
20 days
2012
25 days
2013
24 days
2014
18 days
2015
33 days
2016
14 days
2017
5 days
2018
4 days
2019
5 days
2020
4 days
2021
4 days
2022
4 days
2023
5 days
2024
5 days
2025
4 days
2026
4 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
61 years with a frost
Across 61 years with a frost, the median last spring frost at Bigfork 13 S falls on 6 May and the median first autumn frost on 7 October, which leaves a median of 152 days between them.
In 1983 to 2025 the median growing season was 161 days. That is 16 days more than in 1940 to 1970.
Fitted over all years, the growing season changes by +2.5 days per decade at this station.
Frost dates and growing season at Bigfork 13 S
Measure
Median, all years
Earliest period (1940 to 1970)
Recent period (1983 to 2025)
Recent against earliest
Fitted trend
Last spring frost
6 May
8 May
3 May
5 days earlier
-0.7 days per decade
First autumn frost
7 October
30 September
12 October
12 days later
+1.8 days per decade
Growing days
152 days
145 days
161 days
16 days more
+2.5 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
63 years, 1939 to 2014
A day with at least 33.3 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 109.2 mm (4.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Bigfork 13 S: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
33.3 mm (1.3 in)
5 years
47.5 mm (1.9 in)
10 years
58.9 mm (2.3 in)
25 years
76.2 mm (3.0 in)
50 years
91.5 mm (3.6 in)
100 years
109.2 mm (4.3 in)
Longer than the 63 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, 63 years of values from 1939 to 2014.
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: 127.0 mm (5.0 in) in 1944; 90.2 mm (3.6 in) in 1987; 71.1 mm (2.8 in) in 2005.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Bigfork 13 S standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bigfork 13 S 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.