Record envelope, standing records and threshold days for Forsyth 2 E (USC00243099), Montana, United States, with 72 years of record.
Key Facts for Forsyth 2 E
Forsyth 2 E (USC00243099) is a weather station in Montana, United States at 46.27 latitude and -106.62 longitude, 830 m (2,723 ft) above sea level.
The station reports from 1904 to 1975, 72 years of record.
1,464 records set at Forsyth 2 E still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Forsyth 2 E set a daily record precipitation of 7.6 mm (0.30 in) on 7 August 1975.
About the Station
Location: Montana, United States, 46.27 latitude, -106.62 longitude.
Elevation: 830 m (2,723 ft).
Period of record: 1904 to 1975, 72 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Forsyth 2 E. 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 Forsyth 2 E, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.0 C (68.0 F)
-42.2 C (-44.0 F)
n/a
n/a
Feb
19.4 C (66.9 F)
-43.3 C (-45.9 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-17.2 C (1.0 F)
n/a
n/a
May
37.2 C (99.0 F)
-9.4 C (15.1 F)
n/a
n/a
Jun
40.6 C (105.1 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
43.9 C (111.0 F)
3.3 C (37.9 F)
n/a
n/a
Aug
42.2 C (108.0 F)
-1.7 C (28.9 F)
n/a
n/a
Sep
41.7 C (107.1 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
35.6 C (96.1 F)
-18.9 C (-2.0 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Dec
22.8 C (73.0 F)
-41.7 C (-43.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Forsyth 2 E still stand. 1939 holds the most, with 58.
Standing records at Forsyth 2 E by the year they were set
Year set
Standing records
1904
8
1905
48
1906
35
1907
14
1908
20
1909
39
1910
57
1911
9
1912
28
1913
33
1914
6
1924
44
1925
11
1926
7
1936
11
1937
28
1938
23
1939
58
1940
25
1941
21
1942
28
1943
32
1944
21
1945
33
1946
21
1947
27
1948
35
1949
32
1950
45
1951
50
1952
29
1953
31
1954
40
1955
28
1956
29
1957
19
1958
18
1959
25
1960
34
1961
32
1962
30
1963
26
1964
30
1965
25
1966
26
1967
22
1968
16
1969
34
1970
13
1971
25
1972
43
1973
14
1974
14
1975
12
Wettest Day of Each Month
Jun: 105.2 mm (4.1 in)
The wettest day on record for each calendar month at Forsyth 2 E. The most was 105.2 mm (4.1 in) on 17 June 1944.
Record daily precipitation for each month at Forsyth 2 E
Month
Record daily precipitation (mm)
Date
Jan
20.3 mm (0.8 in)
29 January 1907
Feb
12.7 mm (0.5 in)
1 February 1907
Mar
17.8 mm (0.7 in)
13 March 1957
Apr
40.6 mm (1.6 in)
25 April 1969
May
50.8 mm (2.0 in)
3 May 1955
Jun
105.2 mm (4.1 in)
17 June 1944
Jul
45.5 mm (1.8 in)
4 July 1938
Aug
73.2 mm (2.9 in)
30 August 1971
Sep
52.1 mm (2.1 in)
23 September 1913
Oct
45.7 mm (1.8 in)
28 October 1912
Nov
31.5 mm (1.2 in)
1 November 1957
Dec
16.0 mm (0.6 in)
20 December 1924
Period of Record Coverage
1904 to 1975
Complete yearUnder 90 percent of days
54 years of record at Forsyth 2 E, 1904 to 1975. 10 years have data for under 90 percent of days and are left out of rankings: 1904, 1907, 1908, 1911, 1912, 1914, 1925, 1926 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at Forsyth 2 E, 1906 to 1974. Blue stripes are years cooler than the station's own mean of 7.8 C (46.1 F); red stripes are warmer. The coolest year was 1951, at 5.3 C (41.5 F), and the warmest was 1939, at 10.2 C (50.3 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Forsyth 2 E as warming stripes, 1906 to 1974
Year
Annual mean temperature
Difference from the station mean
1906
8.0 C
+0.15 C
1909
7.3 C
-0.58 C
1910
9.2 C
+1.36 C
1924
6.8 C
-1.01 C
1937
7.7 C
-0.15 C
1938
9.3 C
+1.51 C
1939
10.2 C
+2.33 C
1940
9.0 C
+1.17 C
1941
9.1 C
+1.24 C
1942
7.5 C
-0.37 C
1943
7.7 C
-0.18 C
1944
7.3 C
-0.52 C
1945
6.9 C
-0.91 C
1946
8.1 C
+0.23 C
1947
7.6 C
-0.24 C
1948
8.0 C
+0.14 C
1949
7.0 C
-0.88 C
1951
5.3 C
-2.53 C
1952
6.9 C
-0.92 C
1953
9.0 C
+1.21 C
1954
8.2 C
+0.38 C
1959
7.1 C
-0.74 C
1960
7.8 C
-0.03 C
1961
9.1 C
+1.24 C
1962
8.0 C
+0.19 C
1966
7.0 C
-0.86 C
1968
7.6 C
-0.25 C
1970
7.4 C
-0.44 C
1971
7.4 C
-0.42 C
1972
6.6 C
-1.19 C
1974
8.9 C
+1.02 C
The fitted trend in annual mean temperature here over 1906 to 1974 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.6 to 0.2) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Forsyth 2 E
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.6 to 0.2) per decade
1906 to 1974
31
Not clearly different from zero
Mean daily maximum
-0.24 C (-0.48 to -0.01) per decade
-0.44 F (-0.87 to -0.01) per decade
1906 to 1974
31
Fall
Mean daily minimum
0.1 C (-0.1 to 0.3) per decade
0.1 F (-0.3 to 0.5) per decade
1906 to 1974
31
Not clearly different from zero
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
1904 to 1975
Yearly extremes at Forsyth 2 E: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
1937
39.4 C (102.9 F)
54
Coldest night (TNn)
-43.3 C (-45.9 F)
1905
-33.9 C (-29.0 F)
54
Wettest day (Rx1day)
105.2 mm (4.1 in)
1944
31.8 mm (1.3 in)
54
Wettest five days (Rx5day)
139.8 mm (5.5 in)
1944
50.2 mm (2.0 in)
54
Longest dry spell (CDD)
69 days
1904
35 days
54
Hottest day (TXx)
The hottest day of the year at Forsyth 2 E, 1904 to 1975. The record is 43.9 C (111.0 F) in 1937, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Forsyth 2 E by year
Year
Hottest day (TXx)
1904
36.7 C (98.1 F)
1905
37.8 C (100.0 F)
1906
40.0 C (104.0 F)
1907
31.1 C (88.0 F)
1908
33.9 C (93.0 F)
1909
41.1 C (106.0 F)
1910
42.2 C (108.0 F)
1911
33.3 C (91.9 F)
1912
39.4 C (102.9 F)
1913
38.9 C (102.0 F)
1914
18.9 C (66.0 F)
1924
39.4 C (102.9 F)
1925
38.3 C (100.9 F)
1926
33.3 C (91.9 F)
1936
28.9 C (84.0 F)
1937
43.9 C (111.0 F)
1938
38.9 C (102.0 F)
1939
41.1 C (106.0 F)
1940
40.6 C (105.1 F)
1941
40.6 C (105.1 F)
1942
37.8 C (100.0 F)
1943
39.4 C (102.9 F)
1944
35.6 C (96.1 F)
1945
38.3 C (100.9 F)
1946
37.8 C (100.0 F)
1947
42.8 C (109.0 F)
1948
40.6 C (105.1 F)
1949
42.2 C (108.0 F)
1950
38.3 C (100.9 F)
1951
38.3 C (100.9 F)
1952
38.3 C (100.9 F)
1953
41.1 C (106.0 F)
1954
40.0 C (104.0 F)
1955
41.1 C (106.0 F)
1956
40.6 C (105.1 F)
1957
38.3 C (100.9 F)
1958
38.9 C (102.0 F)
1959
41.7 C (107.1 F)
1960
42.2 C (108.0 F)
1961
41.7 C (107.1 F)
1962
36.7 C (98.1 F)
1963
38.9 C (102.0 F)
1964
41.1 C (106.0 F)
1965
40.6 C (105.1 F)
1966
41.7 C (107.1 F)
1967
38.3 C (100.9 F)
1968
38.9 C (102.0 F)
1969
40.0 C (104.0 F)
1970
39.4 C (102.9 F)
1971
40.6 C (105.1 F)
1972
37.2 C (99.0 F)
1973
39.4 C (102.9 F)
1974
39.4 C (102.9 F)
1975
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Forsyth 2 E, 1904 to 1975. The record is -43.3 C (-45.9 F) in 1905, marked on the chart; the median year is -33.9 C (-29.0 F).
Coldest night (TNn) at Forsyth 2 E by year
Year
Coldest night (TNn)
1904
-32.2 C (-26.0 F)
1905
-43.3 C (-45.9 F)
1906
-29.4 C (-20.9 F)
1907
-38.3 C (-36.9 F)
1908
-22.8 C (-9.0 F)
1909
-39.4 C (-38.9 F)
1910
-38.9 C (-38.0 F)
1911
-30.6 C (-23.1 F)
1912
-31.1 C (-24.0 F)
1913
-38.3 C (-36.9 F)
1914
-41.7 C (-43.1 F)
1924
-42.2 C (-44.0 F)
1925
-28.9 C (-20.0 F)
1926
-14.4 C (6.1 F)
1936
-27.8 C (-18.0 F)
1937
-39.4 C (-38.9 F)
1938
-32.2 C (-26.0 F)
1939
-37.2 C (-35.0 F)
1940
-36.7 C (-34.1 F)
1941
-30.0 C (-22.0 F)
1942
-40.0 C (-40.0 F)
1943
-36.7 C (-34.1 F)
1944
-30.6 C (-23.1 F)
1945
-36.1 C (-33.0 F)
1946
-32.8 C (-27.0 F)
1947
-28.9 C (-20.0 F)
1948
-28.9 C (-20.0 F)
1949
-37.8 C (-36.0 F)
1950
-35.0 C (-31.0 F)
1951
-33.9 C (-29.0 F)
1952
-35.6 C (-32.1 F)
1953
-26.7 C (-16.1 F)
1954
-40.0 C (-40.0 F)
1955
-32.2 C (-26.0 F)
1956
-33.9 C (-29.0 F)
1957
-38.3 C (-36.9 F)
1958
-31.7 C (-25.1 F)
1959
-33.3 C (-27.9 F)
1960
-33.3 C (-27.9 F)
1961
-28.9 C (-20.0 F)
1962
-35.0 C (-31.0 F)
1963
-35.6 C (-32.1 F)
1964
-36.1 C (-33.0 F)
1965
-27.8 C (-18.0 F)
1966
-33.3 C (-27.9 F)
1967
-24.4 C (-11.9 F)
1968
-33.3 C (-27.9 F)
1969
-38.3 C (-36.9 F)
1970
-34.4 C (-29.9 F)
1971
-38.3 C (-36.9 F)
1972
-36.1 C (-33.0 F)
1973
-31.7 C (-25.1 F)
1974
-33.9 C (-29.0 F)
1975
-28.3 C (-18.9 F)
Wettest day (Rx1day)
The wettest day of the year at Forsyth 2 E, 1904 to 1975. The record is 105.2 mm (4.1 in) in 1944, marked on the chart; the median year is 31.8 mm (1.3 in).
Wettest day (Rx1day) at Forsyth 2 E by year
Year
Wettest day (Rx1day)
1904
11.7 mm (0.5 in)
1905
31.8 mm (1.3 in)
1906
31.2 mm (1.2 in)
1907
33.0 mm (1.3 in)
1908
18.3 mm (0.7 in)
1909
27.9 mm (1.1 in)
1910
31.8 mm (1.3 in)
1911
17.8 mm (0.7 in)
1912
45.7 mm (1.8 in)
1913
52.1 mm (2.1 in)
1914
5.6 mm (0.22 in)
1924
24.4 mm (1.0 in)
1925
50.3 mm (2.0 in)
1926
9.9 mm (0.39 in)
1936
12.7 mm (0.5 in)
1937
20.1 mm (0.8 in)
1938
45.5 mm (1.8 in)
1939
32.5 mm (1.3 in)
1940
40.6 mm (1.6 in)
1941
30.2 mm (1.2 in)
1942
20.3 mm (0.8 in)
1943
31.0 mm (1.2 in)
1944
105.2 mm (4.1 in)
1945
24.1 mm (0.9 in)
1946
45.2 mm (1.8 in)
1947
23.4 mm (0.9 in)
1948
40.4 mm (1.6 in)
1949
38.9 mm (1.5 in)
1950
40.6 mm (1.6 in)
1951
25.1 mm (1.0 in)
1952
21.3 mm (0.8 in)
1953
34.5 mm (1.4 in)
1954
28.7 mm (1.1 in)
1955
50.8 mm (2.0 in)
1956
19.6 mm (0.8 in)
1957
31.8 mm (1.3 in)
1958
21.8 mm (0.9 in)
1959
13.2 mm (0.5 in)
1960
21.8 mm (0.9 in)
1961
45.7 mm (1.8 in)
1962
35.6 mm (1.4 in)
1963
42.9 mm (1.7 in)
1964
50.8 mm (2.0 in)
1965
26.4 mm (1.0 in)
1966
47.0 mm (1.9 in)
1967
43.4 mm (1.7 in)
1968
17.0 mm (0.7 in)
1969
40.6 mm (1.6 in)
1970
33.0 mm (1.3 in)
1971
73.2 mm (2.9 in)
1972
26.9 mm (1.1 in)
1973
36.3 mm (1.4 in)
1974
27.7 mm (1.1 in)
1975
41.9 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Forsyth 2 E, 1904 to 1975. The record is 139.8 mm (5.5 in) in 1944, marked on the chart; the median year is 50.2 mm (2.0 in).
Wettest five days (Rx5day) at Forsyth 2 E by year
Year
Wettest five days (Rx5day)
1904
18.3 mm (0.7 in)
1905
55.4 mm (2.2 in)
1906
81.1 mm (3.2 in)
1907
75.7 mm (3.0 in)
1908
18.3 mm (0.7 in)
1909
33.0 mm (1.3 in)
1910
63.3 mm (2.5 in)
1911
20.3 mm (0.8 in)
1912
75.8 mm (3.0 in)
1913
54.1 mm (2.1 in)
1914
4.8 mm (0.19 in)
1924
40.7 mm (1.6 in)
1925
55.1 mm (2.2 in)
1926
12.2 mm (0.5 in)
1936
15.7 mm (0.6 in)
1937
30.8 mm (1.2 in)
1938
82.0 mm (3.2 in)
1939
42.6 mm (1.7 in)
1940
50.3 mm (2.0 in)
1941
38.8 mm (1.5 in)
1942
43.5 mm (1.7 in)
1943
50.1 mm (2.0 in)
1944
139.8 mm (5.5 in)
1945
36.1 mm (1.4 in)
1946
57.1 mm (2.2 in)
1947
32.3 mm (1.3 in)
1948
64.9 mm (2.6 in)
1949
42.2 mm (1.7 in)
1950
48.0 mm (1.9 in)
1951
70.5 mm (2.8 in)
1952
38.2 mm (1.5 in)
1953
56.6 mm (2.2 in)
1954
60.4 mm (2.4 in)
1955
55.4 mm (2.2 in)
1956
32.1 mm (1.3 in)
1957
43.5 mm (1.7 in)
1958
31.2 mm (1.2 in)
1959
20.8 mm (0.8 in)
1960
22.8 mm (0.9 in)
1961
67.6 mm (2.7 in)
1962
75.4 mm (3.0 in)
1963
76.2 mm (3.0 in)
1964
59.4 mm (2.3 in)
1965
35.5 mm (1.4 in)
1966
66.5 mm (2.6 in)
1967
63.4 mm (2.5 in)
1968
38.6 mm (1.5 in)
1969
70.8 mm (2.8 in)
1970
61.7 mm (2.4 in)
1971
84.4 mm (3.3 in)
1972
38.6 mm (1.5 in)
1973
68.8 mm (2.7 in)
1974
36.5 mm (1.4 in)
1975
73.4 mm (2.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Forsyth 2 E, 1904 to 1975. The record is 69 days in 1904, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Forsyth 2 E by year
Year
Longest dry spell (CDD)
1904
69 days
1905
31 days
1906
35 days
1907
31 days
1908
34 days
1909
60 days
1910
29 days
1911
53 days
1912
31 days
1913
59 days
1914
20 days
1924
30 days
1925
20 days
1926
26 days
1936
17 days
1937
42 days
1938
37 days
1939
42 days
1940
28 days
1941
53 days
1942
31 days
1943
39 days
1944
35 days
1945
47 days
1946
37 days
1947
51 days
1948
41 days
1949
50 days
1950
27 days
1951
36 days
1952
42 days
1953
33 days
1954
66 days
1955
45 days
1956
60 days
1957
33 days
1958
27 days
1959
57 days
1960
36 days
1961
27 days
1962
32 days
1963
28 days
1964
38 days
1965
42 days
1966
35 days
1967
51 days
1968
22 days
1969
35 days
1970
39 days
1971
57 days
1972
25 days
1973
33 days
1974
30 days
1975
22 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
31 years with a frost
Across 31 years with a frost, the median last spring frost at Forsyth 2 E falls on 15 May and the median first autumn frost on 25 September, which leaves a median of 137 days between them.
Fitted over all years, the growing season changes by +1.4 days per decade at this station.
Frost dates and growing season at Forsyth 2 E
Measure
Median, all years
Earliest period
Recent period (1909 to 1974)
Recent against earliest
Fitted trend
Last spring frost
15 May
n/a
15 May
n/a
-1.6 days per decade
First autumn frost
25 September
n/a
24 September
n/a
-0.2 days per decade
Growing days
137 days
n/a
137 days
n/a
+1.4 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
42 years, 1905 to 1974
A day with at least 32.3 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 90.3 mm (3.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Forsyth 2 E: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
32.3 mm (1.3 in)
5 years
45.3 mm (1.8 in)
10 years
54.8 mm (2.2 in)
25 years
68.1 mm (2.7 in)
50 years
78.8 mm (3.1 in)
Longer than the 42 years of record
100 years
90.3 mm (3.6 in)
Longer than the 42 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, 42 years of values from 1905 to 1974.
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: 105.2 mm (4.1 in) in 1944; 73.2 mm (2.9 in) in 1971; 52.1 mm (2.1 in) in 1913.
Download the Data
Data for Forsyth 2 E standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Forsyth 2 E 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.