Record envelope, standing records and threshold days for Moccasin Exp STN (USC00245761), Montana, United States, with 116 years of record.
Key Facts for Moccasin Exp STN
Moccasin Exp STN (USC00245761) is a weather station in Montana, United States at 47.06 latitude and -109.95 longitude, 1,311 m (4,300 ft) above sea level.
The station reports from 1909 to 2024, 116 years of record.
1,464 records set at Moccasin Exp STN still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Moccasin Exp STN tied a daily record high maximum temperature of 15.0 C (59.0 F) on 21 December 2024.
About the Station
Location: Montana, United States, 47.06 latitude, -109.95 longitude.
Elevation: 1,311 m (4,300 ft).
Period of record: 1909 to 2024, 116 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 Moccasin Exp STN. 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 Moccasin Exp STN, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
22.2 C (72.0 F)
-41.1 C (-42.0 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-44.4 C (-47.9 F)
n/a
n/a
Mar
25.0 C (77.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Apr
30.6 C (87.1 F)
-27.8 C (-18.0 F)
n/a
n/a
May
33.9 C (93.0 F)
-16.7 C (1.9 F)
n/a
n/a
Jun
38.3 C (100.9 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
38.9 C (102.0 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
39.4 C (102.9 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-15.6 C (3.9 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-35.6 C (-32.1 F)
n/a
n/a
Dec
22.2 C (72.0 F)
-40.6 C (-41.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Moccasin Exp STN still stand. 1936 holds the most, with 51.
Standing records at Moccasin Exp STN by the year they were set
Year set
Standing records
1909
7
1910
11
1911
24
1912
4
1913
21
1914
11
1915
6
1916
31
1917
20
1918
25
1919
24
1920
8
1921
18
1922
14
1923
12
1924
21
1925
11
1926
13
1927
13
1928
14
1929
16
1930
20
1931
18
1932
21
1933
14
1934
24
1935
16
1936
51
1937
12
1938
12
1939
25
1940
17
1941
8
1942
9
1943
25
1944
7
1945
12
1946
9
1947
15
1948
4
1949
12
1950
25
1952
10
1953
15
1954
23
1955
13
1956
8
1957
9
1958
11
1959
13
1960
16
1961
12
1962
15
1963
8
1964
10
1965
16
1966
10
1967
15
1968
17
1969
19
1970
9
1971
8
1972
16
1973
13
1974
6
1975
10
1976
5
1977
7
1978
8
1979
4
1980
17
1981
10
1982
9
1983
10
1984
13
1985
25
1986
15
1987
20
1988
19
1989
11
1990
16
1991
8
1992
21
1993
6
1994
7
1995
12
1996
13
1997
6
1998
3
1999
16
2000
4
2001
9
2002
17
2003
19
2004
4
2005
17
2006
11
2007
12
2008
11
2009
13
2010
8
2011
5
2012
8
2013
4
2014
8
2015
16
2016
5
2017
12
2018
2
2019
4
2020
8
2021
4
All-Time Record Progression
5 new records
5 all-time records were set at Moccasin Exp STN between 3 June 1948 and 24 August 2014. Each dot is a new record.
When Moccasin Exp STN set new all-time records
Date
Kind
Detail
1948-06-03
Record daily precipitation
Record daily precipitation 75.7 mm (3.0 in)
1961-08-06
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
1979-06-19
Record daily precipitation
Record daily precipitation 76.5 mm (3.0 in)
1985-08-03
Record daily precipitation
Record daily precipitation 76.7 mm (3.0 in)
2014-08-24
Record daily precipitation
Record daily precipitation 90.7 mm (3.6 in)
Wettest Day of Each Month
Aug: 90.7 mm (3.6 in)
The wettest day on record for each calendar month at Moccasin Exp STN. The most was 90.7 mm (3.6 in) on 24 August 2014.
Record daily precipitation for each month at Moccasin Exp STN
Month
Record daily precipitation (mm)
Date
Jan
17.8 mm (0.7 in)
11 January 1917
Feb
21.1 mm (0.8 in)
21 February 1914
Mar
23.4 mm (0.9 in)
27 March 1916
Apr
48.3 mm (1.9 in)
15 April 1920
May
45.2 mm (1.8 in)
25 May 2011
Jun
76.5 mm (3.0 in)
19 June 1979
Jul
54.4 mm (2.1 in)
7 July 1926
Aug
90.7 mm (3.6 in)
24 August 2014
Sep
39.4 mm (1.6 in)
12 September 1978
Oct
32.0 mm (1.3 in)
7 October 2006
Nov
21.1 mm (0.8 in)
4 November 1927
Dec
24.9 mm (1.0 in)
13 December 1917
Period of Record Coverage
1909 to 2024
Complete yearUnder 90 percent of days
113 years of record at Moccasin Exp STN, 1909 to 2024. 9 years have data for under 90 percent of days and are left out of rankings: 1909, 1910, 2011, 2013, 2018, 2019, 2020, 2021 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 99 complete years at Moccasin Exp STN, 1911 to 2015. Blue stripes are years cooler than the station's own mean of 6.0 C (42.8 F); red stripes are warmer. The coolest year was 1916, at 3.4 C (38.1 F), and the warmest was 1934, at 8.0 C (46.4 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Moccasin Exp STN as warming stripes, 1911 to 2015
Year
Annual mean temperature
Difference from the station mean
1911
4.3 C
-1.75 C
1912
5.1 C
-0.97 C
1913
5.1 C
-0.90 C
1915
6.0 C
-0.05 C
1916
3.4 C
-2.63 C
1917
4.4 C
-1.65 C
1918
5.5 C
-0.57 C
1919
5.5 C
-0.52 C
1920
5.5 C
-0.57 C
1921
6.2 C
+0.20 C
1922
4.8 C
-1.24 C
1923
5.8 C
-0.27 C
1924
4.9 C
-1.17 C
1925
6.3 C
+0.23 C
1926
6.4 C
+0.39 C
1927
4.1 C
-1.88 C
1928
5.7 C
-0.36 C
1929
4.3 C
-1.68 C
1930
6.0 C
-0.05 C
1931
7.5 C
+1.43 C
1932
5.5 C
-0.55 C
1933
6.2 C
+0.14 C
1934
8.0 C
+1.98 C
1935
5.6 C
-0.39 C
1936
5.8 C
-0.23 C
1937
5.1 C
-0.89 C
1938
6.5 C
+0.43 C
1939
6.9 C
+0.90 C
1940
6.8 C
+0.80 C
1941
6.7 C
+0.70 C
1942
5.7 C
-0.36 C
1943
6.1 C
+0.08 C
1944
6.1 C
+0.08 C
1945
5.6 C
-0.44 C
1946
6.5 C
+0.45 C
1947
5.8 C
-0.27 C
1948
5.4 C
-0.62 C
1949
5.4 C
-0.66 C
1950
4.2 C
-1.83 C
1952
6.6 C
+0.56 C
1953
7.3 C
+1.31 C
1954
5.7 C
-0.34 C
1955
4.3 C
-1.75 C
1956
6.3 C
+0.27 C
1957
5.7 C
-0.29 C
1958
7.0 C
+1.00 C
1959
5.5 C
-0.50 C
1960
6.2 C
+0.22 C
1961
7.1 C
+1.09 C
1962
6.0 C
-0.05 C
1963
7.1 C
+1.04 C
1964
5.4 C
-0.58 C
1965
5.3 C
-0.69 C
1966
5.9 C
-0.14 C
1967
6.0 C
-0.02 C
1968
5.5 C
-0.50 C
1969
5.3 C
-0.71 C
1970
5.2 C
-0.83 C
1971
5.4 C
-0.60 C
1972
5.3 C
-0.73 C
1973
6.6 C
+0.58 C
1974
6.5 C
+0.46 C
1975
4.3 C
-1.72 C
1976
7.2 C
+1.14 C
1977
6.2 C
+0.18 C
1978
4.6 C
-1.47 C
1979
5.8 C
-0.27 C
1980
6.3 C
+0.30 C
1981
7.5 C
+1.45 C
1982
4.7 C
-1.30 C
1983
6.3 C
+0.32 C
1984
6.1 C
+0.11 C
1985
4.8 C
-1.24 C
1986
7.0 C
+0.97 C
1987
7.8 C
+1.78 C
1988
7.4 C
+1.37 C
1989
5.3 C
-0.75 C
1990
6.7 C
+0.66 C
1991
6.8 C
+0.76 C
1992
7.3 C
+1.23 C
1993
4.9 C
-1.14 C
1994
6.7 C
+0.72 C
1995
6.0 C
-0.06 C
1996
4.6 C
-1.41 C
1997
6.6 C
+0.56 C
1998
7.4 C
+1.40 C
1999
7.8 C
+1.79 C
2000
6.7 C
+0.71 C
2001
7.6 C
+1.62 C
2002
5.7 C
-0.37 C
2003
7.2 C
+1.13 C
2004
6.7 C
+0.70 C
2005
6.8 C
+0.81 C
2006
7.7 C
+1.67 C
2007
7.5 C
+1.51 C
2008
6.3 C
+0.26 C
2009
6.1 C
+0.12 C
2010
6.5 C
+0.48 C
2015
7.6 C
+1.60 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1911 to 2015. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 99 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Moccasin Exp STN
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
1911 to 2015
99
Rise
Mean daily maximum
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1911 to 2015
99
Rise
Mean daily minimum
0.1 C (0.1 to 0.2) per decade
0.2 F (0.1 to 0.3) per decade
1911 to 2015
99
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
1909 to 2024
Yearly extremes at Moccasin Exp STN: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1961
35.6 C (96.1 F)
113
Coldest night (TNn)
-44.4 C (-47.9 F)
1936
-32.8 C (-27.0 F)
113
Wettest day (Rx1day)
90.7 mm (3.6 in)
2014
29.7 mm (1.2 in)
113
Wettest five days (Rx5day)
160.6 mm (6.3 in)
2014
53.9 mm (2.1 in)
113
Longest dry spell (CDD)
58 days
2006
29 days
113
Hottest day (TXx)
The hottest day of the year at Moccasin Exp STN, 1909 to 2024. The record is 39.4 C (102.9 F) in 1961, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Moccasin Exp STN by year
Year
Hottest day (TXx)
1909
34.4 C (93.9 F)
1910
35.6 C (96.1 F)
1911
32.2 C (90.0 F)
1912
33.9 C (93.0 F)
1913
32.8 C (91.0 F)
1914
33.9 C (93.0 F)
1915
32.8 C (91.0 F)
1916
33.3 C (91.9 F)
1917
35.6 C (96.1 F)
1918
35.0 C (95.0 F)
1919
37.8 C (100.0 F)
1920
33.9 C (93.0 F)
1921
35.0 C (95.0 F)
1922
32.8 C (91.0 F)
1923
32.2 C (90.0 F)
1924
34.4 C (93.9 F)
1925
36.1 C (97.0 F)
1926
35.6 C (96.1 F)
1927
32.2 C (90.0 F)
1928
35.6 C (96.1 F)
1929
37.2 C (99.0 F)
1930
36.1 C (97.0 F)
1931
38.3 C (100.9 F)
1932
35.6 C (96.1 F)
1933
38.9 C (102.0 F)
1934
36.7 C (98.1 F)
1935
37.2 C (99.0 F)
1936
38.9 C (102.0 F)
1937
38.9 C (102.0 F)
1938
33.9 C (93.0 F)
1939
36.7 C (98.1 F)
1940
38.3 C (100.9 F)
1941
37.2 C (99.0 F)
1942
33.9 C (93.0 F)
1943
35.6 C (96.1 F)
1944
32.8 C (91.0 F)
1945
35.6 C (96.1 F)
1946
35.6 C (96.1 F)
1947
36.7 C (98.1 F)
1948
35.6 C (96.1 F)
1949
38.3 C (100.9 F)
1950
33.3 C (91.9 F)
1952
36.1 C (97.0 F)
1953
37.8 C (100.0 F)
1954
35.6 C (96.1 F)
1955
37.2 C (99.0 F)
1956
35.0 C (95.0 F)
1957
35.0 C (95.0 F)
1958
33.9 C (93.0 F)
1959
33.9 C (93.0 F)
1960
37.2 C (99.0 F)
1961
39.4 C (102.9 F)
1962
31.7 C (89.1 F)
1963
35.6 C (96.1 F)
1964
36.1 C (97.0 F)
1965
34.4 C (93.9 F)
1966
37.2 C (99.0 F)
1967
35.0 C (95.0 F)
1968
33.9 C (93.0 F)
1969
38.3 C (100.9 F)
1970
37.2 C (99.0 F)
1971
36.7 C (98.1 F)
1972
33.9 C (93.0 F)
1973
36.1 C (97.0 F)
1974
34.4 C (93.9 F)
1975
35.6 C (96.1 F)
1976
35.0 C (95.0 F)
1977
33.3 C (91.9 F)
1978
33.3 C (91.9 F)
1979
35.6 C (96.1 F)
1980
35.0 C (95.0 F)
1981
36.7 C (98.1 F)
1982
32.8 C (91.0 F)
1983
38.3 C (100.9 F)
1984
36.1 C (97.0 F)
1985
35.6 C (96.1 F)
1986
34.4 C (93.9 F)
1987
33.9 C (93.0 F)
1988
36.1 C (97.0 F)
1989
33.9 C (93.0 F)
1990
37.2 C (99.0 F)
1991
35.6 C (96.1 F)
1992
34.4 C (93.9 F)
1993
31.7 C (89.1 F)
1994
34.4 C (93.9 F)
1995
35.0 C (95.0 F)
1996
36.1 C (97.0 F)
1997
33.3 C (91.9 F)
1998
35.0 C (95.0 F)
1999
37.2 C (99.0 F)
2000
36.1 C (97.0 F)
2001
38.9 C (102.0 F)
2002
37.2 C (99.0 F)
2003
38.3 C (100.9 F)
2004
36.7 C (98.1 F)
2005
35.6 C (96.1 F)
2006
36.7 C (98.1 F)
2007
38.3 C (100.9 F)
2008
37.8 C (100.0 F)
2009
34.4 C (93.9 F)
2010
36.7 C (98.1 F)
2011
35.6 C (96.1 F)
2012
37.2 C (99.0 F)
2013
37.8 C (100.0 F)
2014
36.1 C (97.0 F)
2015
36.7 C (98.1 F)
2016
36.7 C (98.1 F)
2017
36.1 C (97.0 F)
2018
28.9 C (84.0 F)
2019
25.6 C (78.1 F)
2020
28.3 C (82.9 F)
2021
18.9 C (66.0 F)
2024
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Moccasin Exp STN, 1909 to 2024. The record is -44.4 C (-47.9 F) in 1936, marked on the chart; the median year is -32.8 C (-27.0 F).
Coldest night (TNn) at Moccasin Exp STN by year
Year
Coldest night (TNn)
1909
-12.2 C (10.0 F)
1910
-27.8 C (-18.0 F)
1911
-36.7 C (-34.1 F)
1912
-30.6 C (-23.1 F)
1913
-33.9 C (-29.0 F)
1914
-32.2 C (-26.0 F)
1915
-28.9 C (-20.0 F)
1916
-38.3 C (-36.9 F)
1917
-37.2 C (-35.0 F)
1918
-37.8 C (-36.0 F)
1919
-36.1 C (-33.0 F)
1920
-30.0 C (-22.0 F)
1921
-35.0 C (-31.0 F)
1922
-32.2 C (-26.0 F)
1923
-40.0 C (-40.0 F)
1924
-40.0 C (-40.0 F)
1925
-28.3 C (-18.9 F)
1926
-30.0 C (-22.0 F)
1927
-36.1 C (-33.0 F)
1928
-31.7 C (-25.1 F)
1929
-41.1 C (-42.0 F)
1930
-39.4 C (-38.9 F)
1931
-22.2 C (-8.0 F)
1932
-34.4 C (-29.9 F)
1933
-35.6 C (-32.1 F)
1934
-30.6 C (-23.1 F)
1935
-35.6 C (-32.1 F)
1936
-44.4 C (-47.9 F)
1937
-34.4 C (-29.9 F)
1938
-32.8 C (-27.0 F)
1939
-40.0 C (-40.0 F)
1940
-33.3 C (-27.9 F)
1941
-35.0 C (-31.0 F)
1942
-26.1 C (-15.0 F)
1943
-35.6 C (-32.1 F)
1944
-26.7 C (-16.1 F)
1945
-31.7 C (-25.1 F)
1946
-28.9 C (-20.0 F)
1947
-32.8 C (-27.0 F)
1948
-32.8 C (-27.0 F)
1949
-36.1 C (-33.0 F)
1950
-40.0 C (-40.0 F)
1952
-33.9 C (-29.0 F)
1953
-23.3 C (-9.9 F)
1954
-39.4 C (-38.9 F)
1955
-35.6 C (-32.1 F)
1956
-35.0 C (-31.0 F)
1957
-36.1 C (-33.0 F)
1958
-25.6 C (-14.1 F)
1959
-35.0 C (-31.0 F)
1960
-32.8 C (-27.0 F)
1961
-30.0 C (-22.0 F)
1962
-33.3 C (-27.9 F)
1963
-36.1 C (-33.0 F)
1964
-35.0 C (-31.0 F)
1965
-31.7 C (-25.1 F)
1966
-32.8 C (-27.0 F)
1967
-31.1 C (-24.0 F)
1968
-40.6 C (-41.1 F)
1969
-39.4 C (-38.9 F)
1970
-27.8 C (-18.0 F)
1971
-38.9 C (-38.0 F)
1972
-36.7 C (-34.1 F)
1973
-28.9 C (-20.0 F)
1974
-30.6 C (-23.1 F)
1975
-30.6 C (-23.1 F)
1976
-28.9 C (-20.0 F)
1977
-33.3 C (-27.9 F)
1978
-32.8 C (-27.0 F)
1979
-32.2 C (-26.0 F)
1980
-33.9 C (-29.0 F)
1981
-32.2 C (-26.0 F)
1982
-33.9 C (-29.0 F)
1983
-38.3 C (-36.9 F)
1984
-33.9 C (-29.0 F)
1985
-32.8 C (-27.0 F)
1986
-30.0 C (-22.0 F)
1987
-24.4 C (-11.9 F)
1988
-28.9 C (-20.0 F)
1989
-36.7 C (-34.1 F)
1990
-37.2 C (-35.0 F)
1991
-30.0 C (-22.0 F)
1992
-31.7 C (-25.1 F)
1993
-30.6 C (-23.1 F)
1994
-34.4 C (-29.9 F)
1995
-28.3 C (-18.9 F)
1996
-34.4 C (-29.9 F)
1997
-35.0 C (-31.0 F)
1998
-32.2 C (-26.0 F)
1999
-25.6 C (-14.1 F)
2000
-29.4 C (-20.9 F)
2001
-22.8 C (-9.0 F)
2002
-26.7 C (-16.1 F)
2003
-27.8 C (-18.0 F)
2004
-31.1 C (-24.0 F)
2005
-33.3 C (-27.9 F)
2006
-34.4 C (-29.9 F)
2007
-26.7 C (-16.1 F)
2008
-32.8 C (-27.0 F)
2009
-33.3 C (-27.9 F)
2010
-29.4 C (-20.9 F)
2011
-31.7 C (-25.1 F)
2012
-28.9 C (-20.0 F)
2013
-20.0 C (-4.0 F)
2014
-35.0 C (-31.0 F)
2015
-25.0 C (-13.0 F)
2016
-31.7 C (-25.1 F)
2017
-27.2 C (-17.0 F)
2018
-30.0 C (-22.0 F)
2019
-30.0 C (-22.0 F)
2020
-29.4 C (-20.9 F)
2021
-38.3 C (-36.9 F)
2024
-17.2 C (1.0 F)
Wettest day (Rx1day)
The wettest day of the year at Moccasin Exp STN, 1909 to 2024. The record is 90.7 mm (3.6 in) in 2014, marked on the chart; the median year is 29.7 mm (1.2 in).
Wettest day (Rx1day) at Moccasin Exp STN by year
Year
Wettest day (Rx1day)
1909
51.6 mm (2.0 in)
1910
25.9 mm (1.0 in)
1911
47.2 mm (1.9 in)
1912
30.7 mm (1.2 in)
1913
29.2 mm (1.1 in)
1914
39.1 mm (1.5 in)
1915
24.1 mm (0.9 in)
1916
30.0 mm (1.2 in)
1917
26.7 mm (1.1 in)
1918
31.8 mm (1.3 in)
1919
14.5 mm (0.6 in)
1920
48.3 mm (1.9 in)
1921
37.8 mm (1.5 in)
1922
21.3 mm (0.8 in)
1923
26.4 mm (1.0 in)
1924
25.1 mm (1.0 in)
1925
30.2 mm (1.2 in)
1926
54.4 mm (2.1 in)
1927
21.1 mm (0.8 in)
1928
21.1 mm (0.8 in)
1929
34.3 mm (1.4 in)
1930
20.1 mm (0.8 in)
1931
19.8 mm (0.8 in)
1932
27.9 mm (1.1 in)
1933
20.3 mm (0.8 in)
1934
26.2 mm (1.0 in)
1935
21.6 mm (0.9 in)
1936
21.8 mm (0.9 in)
1937
13.7 mm (0.5 in)
1938
31.2 mm (1.2 in)
1939
24.4 mm (1.0 in)
1940
19.6 mm (0.8 in)
1941
24.9 mm (1.0 in)
1942
34.8 mm (1.4 in)
1943
41.1 mm (1.6 in)
1944
30.0 mm (1.2 in)
1945
27.9 mm (1.1 in)
1946
29.2 mm (1.1 in)
1947
35.3 mm (1.4 in)
1948
75.7 mm (3.0 in)
1949
42.4 mm (1.7 in)
1950
20.1 mm (0.8 in)
1952
21.3 mm (0.8 in)
1953
29.7 mm (1.2 in)
1954
41.1 mm (1.6 in)
1955
22.9 mm (0.9 in)
1956
59.2 mm (2.3 in)
1957
42.7 mm (1.7 in)
1958
22.9 mm (0.9 in)
1959
21.3 mm (0.8 in)
1960
16.8 mm (0.7 in)
1961
24.6 mm (1.0 in)
1962
42.4 mm (1.7 in)
1963
24.6 mm (1.0 in)
1964
53.3 mm (2.1 in)
1965
24.1 mm (0.9 in)
1966
16.8 mm (0.7 in)
1967
33.5 mm (1.3 in)
1968
22.6 mm (0.9 in)
1969
55.1 mm (2.2 in)
1970
30.0 mm (1.2 in)
1971
19.6 mm (0.8 in)
1972
42.7 mm (1.7 in)
1973
30.7 mm (1.2 in)
1974
25.4 mm (1.0 in)
1975
32.8 mm (1.3 in)
1976
26.7 mm (1.1 in)
1977
15.0 mm (0.6 in)
1978
39.4 mm (1.6 in)
1979
76.5 mm (3.0 in)
1980
44.7 mm (1.8 in)
1981
27.7 mm (1.1 in)
1982
31.0 mm (1.2 in)
1983
47.2 mm (1.9 in)
1984
17.3 mm (0.7 in)
1985
76.7 mm (3.0 in)
1986
35.6 mm (1.4 in)
1987
38.1 mm (1.5 in)
1988
43.9 mm (1.7 in)
1989
41.4 mm (1.6 in)
1990
24.1 mm (0.9 in)
1991
25.9 mm (1.0 in)
1992
29.7 mm (1.2 in)
1993
30.5 mm (1.2 in)
1994
45.0 mm (1.8 in)
1995
40.9 mm (1.6 in)
1996
28.4 mm (1.1 in)
1997
31.8 mm (1.3 in)
1998
32.3 mm (1.3 in)
1999
45.0 mm (1.8 in)
2000
25.1 mm (1.0 in)
2001
22.4 mm (0.9 in)
2002
47.0 mm (1.9 in)
2003
24.4 mm (1.0 in)
2004
26.4 mm (1.0 in)
2005
20.1 mm (0.8 in)
2006
32.0 mm (1.3 in)
2007
26.9 mm (1.1 in)
2008
27.7 mm (1.1 in)
2009
28.2 mm (1.1 in)
2010
21.8 mm (0.9 in)
2011
45.2 mm (1.8 in)
2012
20.1 mm (0.8 in)
2013
37.8 mm (1.5 in)
2014
90.7 mm (3.6 in)
2015
31.8 mm (1.3 in)
2016
30.2 mm (1.2 in)
2017
35.8 mm (1.4 in)
2018
30.5 mm (1.2 in)
2019
37.1 mm (1.5 in)
2020
7.1 mm (0.28 in)
2021
5.8 mm (0.23 in)
2024
34.5 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Moccasin Exp STN, 1909 to 2024. The record is 160.6 mm (6.3 in) in 2014, marked on the chart; the median year is 53.9 mm (2.1 in).
Wettest five days (Rx5day) at Moccasin Exp STN by year
Year
Wettest five days (Rx5day)
1909
81.8 mm (3.2 in)
1910
38.4 mm (1.5 in)
1911
95.0 mm (3.7 in)
1912
57.6 mm (2.3 in)
1913
47.2 mm (1.9 in)
1914
51.9 mm (2.0 in)
1915
47.5 mm (1.9 in)
1916
41.2 mm (1.6 in)
1917
44.5 mm (1.8 in)
1918
43.5 mm (1.7 in)
1919
29.2 mm (1.1 in)
1920
63.2 mm (2.5 in)
1921
60.7 mm (2.4 in)
1922
58.9 mm (2.3 in)
1923
91.9 mm (3.6 in)
1924
30.2 mm (1.2 in)
1925
38.0 mm (1.5 in)
1926
81.3 mm (3.2 in)
1927
57.6 mm (2.3 in)
1928
53.9 mm (2.1 in)
1929
45.5 mm (1.8 in)
1930
31.6 mm (1.2 in)
1931
31.6 mm (1.2 in)
1932
71.9 mm (2.8 in)
1933
66.9 mm (2.6 in)
1934
45.5 mm (1.8 in)
1935
30.2 mm (1.2 in)
1936
29.8 mm (1.2 in)
1937
22.4 mm (0.9 in)
1938
49.2 mm (1.9 in)
1939
41.5 mm (1.6 in)
1940
52.5 mm (2.1 in)
1941
46.2 mm (1.8 in)
1942
72.9 mm (2.9 in)
1943
59.5 mm (2.3 in)
1944
73.9 mm (2.9 in)
1945
74.4 mm (2.9 in)
1946
56.4 mm (2.2 in)
1947
70.8 mm (2.8 in)
1948
110.0 mm (4.3 in)
1949
46.8 mm (1.8 in)
1950
35.8 mm (1.4 in)
1952
39.6 mm (1.6 in)
1953
54.7 mm (2.2 in)
1954
72.1 mm (2.8 in)
1955
51.4 mm (2.0 in)
1956
64.3 mm (2.5 in)
1957
69.9 mm (2.8 in)
1958
41.9 mm (1.6 in)
1959
33.1 mm (1.3 in)
1960
31.8 mm (1.3 in)
1961
45.2 mm (1.8 in)
1962
86.4 mm (3.4 in)
1963
52.8 mm (2.1 in)
1964
101.6 mm (4.0 in)
1965
56.4 mm (2.2 in)
1966
33.0 mm (1.3 in)
1967
62.7 mm (2.5 in)
1968
54.6 mm (2.1 in)
1969
96.5 mm (3.8 in)
1970
66.8 mm (2.6 in)
1971
27.9 mm (1.1 in)
1972
46.8 mm (1.8 in)
1973
41.7 mm (1.6 in)
1974
52.1 mm (2.1 in)
1975
74.7 mm (2.9 in)
1976
45.9 mm (1.8 in)
1977
31.3 mm (1.2 in)
1978
66.8 mm (2.6 in)
1979
99.3 mm (3.9 in)
1980
78.0 mm (3.1 in)
1981
62.3 mm (2.5 in)
1982
57.7 mm (2.3 in)
1983
57.1 mm (2.2 in)
1984
33.8 mm (1.3 in)
1985
78.6 mm (3.1 in)
1986
45.4 mm (1.8 in)
1987
67.0 mm (2.6 in)
1988
61.2 mm (2.4 in)
1989
59.0 mm (2.3 in)
1990
36.0 mm (1.4 in)
1991
42.2 mm (1.7 in)
1992
64.2 mm (2.5 in)
1993
49.0 mm (1.9 in)
1994
53.1 mm (2.1 in)
1995
52.8 mm (2.1 in)
1996
43.1 mm (1.7 in)
1997
53.9 mm (2.1 in)
1998
63.8 mm (2.5 in)
1999
60.0 mm (2.4 in)
2000
29.3 mm (1.2 in)
2001
46.5 mm (1.8 in)
2002
66.3 mm (2.6 in)
2003
48.5 mm (1.9 in)
2004
40.9 mm (1.6 in)
2005
33.8 mm (1.3 in)
2006
52.4 mm (2.1 in)
2007
65.0 mm (2.6 in)
2008
92.4 mm (3.6 in)
2009
32.8 mm (1.3 in)
2010
60.3 mm (2.4 in)
2011
95.6 mm (3.8 in)
2012
28.2 mm (1.1 in)
2013
72.6 mm (2.9 in)
2014
160.6 mm (6.3 in)
2015
57.6 mm (2.3 in)
2016
39.6 mm (1.6 in)
2017
55.2 mm (2.2 in)
2018
74.3 mm (2.9 in)
2019
54.9 mm (2.2 in)
2020
16.8 mm (0.7 in)
2021
6.6 mm (0.26 in)
2024
62.0 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Moccasin Exp STN, 1909 to 2024. The record is 58 days in 2006, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at Moccasin Exp STN by year
Year
Longest dry spell (CDD)
1909
29 days
1910
28 days
1911
31 days
1912
33 days
1913
40 days
1914
31 days
1915
31 days
1916
22 days
1917
32 days
1918
28 days
1919
35 days
1920
44 days
1921
44 days
1922
27 days
1923
28 days
1924
28 days
1925
49 days
1926
19 days
1927
22 days
1928
44 days
1929
26 days
1930
30 days
1931
48 days
1932
23 days
1933
25 days
1934
35 days
1935
29 days
1936
35 days
1937
28 days
1938
33 days
1939
42 days
1940
33 days
1941
41 days
1942
37 days
1943
36 days
1944
34 days
1945
39 days
1946
18 days
1947
27 days
1948
37 days
1949
32 days
1950
19 days
1952
24 days
1953
34 days
1954
48 days
1955
19 days
1956
29 days
1957
40 days
1958
20 days
1959
36 days
1960
42 days
1961
23 days
1962
26 days
1963
22 days
1964
19 days
1965
31 days
1966
22 days
1967
31 days
1968
25 days
1969
25 days
1970
18 days
1971
27 days
1972
27 days
1973
39 days
1974
23 days
1975
33 days
1976
49 days
1977
24 days
1978
26 days
1979
26 days
1980
27 days
1981
24 days
1982
17 days
1983
23 days
1984
25 days
1985
55 days
1986
25 days
1987
53 days
1988
28 days
1989
24 days
1990
51 days
1991
29 days
1992
33 days
1993
24 days
1994
46 days
1995
27 days
1996
26 days
1997
36 days
1998
34 days
1999
32 days
2000
30 days
2001
35 days
2002
33 days
2003
22 days
2004
46 days
2005
29 days
2006
58 days
2007
41 days
2008
35 days
2009
30 days
2010
23 days
2011
27 days
2012
31 days
2013
28 days
2014
24 days
2015
35 days
2016
20 days
2017
29 days
2018
34 days
2019
17 days
2020
21 days
2021
22 days
2024
24 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
99 years with a frost
Across 99 years with a frost, the median last spring frost at Moccasin Exp STN falls on 26 May and the median first autumn frost on 17 September, which leaves a median of 116 days between them.
In 1982 to 2015 the median growing season was 119 days. That is 5 days more than in 1911 to 1941.
Fitted over all years, the growing season changes by +1.4 days per decade at this station.
Frost dates and growing season at Moccasin Exp STN
Measure
Median, all years
Earliest period (1911 to 1941)
Recent period (1982 to 2015)
Recent against earliest
Fitted trend
Last spring frost
26 May
29 May
23 May
6 days earlier
-0.7 days per decade
First autumn frost
17 September
15 September
18 September
3 days later
+0.7 days per decade
Growing days
116 days
114 days
119 days
5 days more
+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
105 years, 1909 to 2017
A day with at least 29.1 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 84.9 mm (3.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Moccasin Exp STN: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
29.1 mm (1.1 in)
5 years
40.2 mm (1.6 in)
10 years
48.9 mm (1.9 in)
25 years
61.7 mm (2.4 in)
50 years
72.6 mm (2.9 in)
100 years
84.9 mm (3.3 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 105 years of values from 1909 to 2017.
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: 90.7 mm (3.6 in) in 2014; 76.7 mm (3.0 in) in 1985; 76.5 mm (3.0 in) in 1979.
Download the Data
Data for Moccasin Exp STN standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Moccasin Exp STN 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.