Record envelope, standing records and threshold days for Libby 1 NE Rs (USC00245015), Montana, United States, with 128 years of record.
Key Facts for Libby 1 NE Rs
Libby 1 NE Rs (USC00245015) is a weather station in Montana, United States at 48.40 latitude and -115.54 longitude, 639 m (2,096 ft) above sea level.
The station reports from 1895 to 2022, 128 years of record.
1,464 records set at Libby 1 NE Rs still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Libby 1 NE Rs set a daily record precipitation of 26.9 mm (1.1 in) on 8 May 2022.
About the Station
Location: Montana, United States, 48.40 latitude, -115.54 longitude.
Elevation: 639 m (2,096 ft).
Period of record: 1895 to 2022, 128 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 Libby 1 NE Rs. 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 Libby 1 NE Rs, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.3 C (55.9 F)
-43.3 C (-45.9 F)
n/a
n/a
Feb
18.3 C (64.9 F)
-38.3 C (-36.9 F)
n/a
n/a
Mar
23.9 C (75.0 F)
-28.9 C (-20.0 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-20.6 C (-5.1 F)
n/a
n/a
May
38.9 C (102.0 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
43.3 C (109.9 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
42.8 C (109.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
40.6 C (105.1 F)
-10.6 C (12.9 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-21.7 C (-7.1 F)
n/a
n/a
Nov
22.8 C (73.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Dec
18.3 C (64.9 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 Libby 1 NE Rs still stand. 1936 holds the most, with 45.
Standing records at Libby 1 NE Rs by the year they were set
Year set
Standing records
1895
22
1896
26
1897
8
1911
10
1912
13
1913
17
1914
9
1915
6
1916
22
1917
15
1918
21
1919
31
1920
10
1921
11
1922
15
1923
10
1924
43
1925
13
1926
20
1927
10
1928
16
1929
13
1930
19
1931
17
1932
13
1933
24
1934
27
1935
21
1936
45
1937
16
1938
5
1939
15
1940
13
1941
21
1942
8
1943
19
1944
11
1945
11
1946
14
1947
8
1948
12
1949
11
1950
26
1951
19
1952
12
1953
16
1954
17
1955
25
1956
7
1957
21
1958
8
1959
12
1960
20
1961
15
1962
20
1963
13
1964
8
1965
11
1966
9
1967
20
1968
13
1969
6
1970
7
1971
10
1972
13
1973
12
1974
4
1975
5
1976
1
1977
18
1978
5
1979
6
1980
10
1981
9
1982
5
1983
15
1984
9
1985
21
1986
12
1987
12
1988
7
1989
14
1990
9
1991
5
1992
9
1993
16
1994
15
1995
5
1996
11
1997
14
1998
24
1999
10
2000
9
2001
5
2002
13
2003
12
2004
8
2005
10
2006
11
2007
9
2008
3
2009
9
2010
7
2011
11
2012
12
2013
10
2014
6
2015
22
2021
3
2022
2
All-Time Record Progression
6 new records
6 all-time records were set at Libby 1 NE Rs between 18 November 1946 and 15 July 2007. Each dot is a new record.
When Libby 1 NE Rs set new all-time records
Date
Kind
Detail
1946-11-18
Record daily precipitation
Record daily precipitation 53.6 mm (2.1 in)
1984-06-21
Record daily precipitation
Record daily precipitation 55.4 mm (2.2 in)
1996-12-29
Record snow depth
Record snow depth 96.5 cm (38.0 in)
1998-05-27
Record daily precipitation
Record daily precipitation 79.0 mm (3.1 in)
2004-07-19
Record high minimum temperature
Record high minimum temperature 20.6 C (69.1 F)
2007-07-15
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
Wettest Day of Each Month
May: 79.0 mm (3.1 in)
The wettest day on record for each calendar month at Libby 1 NE Rs. The most was 79.0 mm (3.1 in) on 27 May 1998.
Record daily precipitation for each month at Libby 1 NE Rs
Month
Record daily precipitation (mm)
Date
Jan
51.8 mm (2.0 in)
9 January 1953
Feb
28.2 mm (1.1 in)
15 February 1986
Mar
37.1 mm (1.5 in)
15 March 2015
Apr
31.8 mm (1.3 in)
28 April 1922
May
79.0 mm (3.1 in)
27 May 1998
Jun
55.4 mm (2.2 in)
21 June 1984
Jul
51.3 mm (2.0 in)
24 July 1990
Aug
39.4 mm (1.6 in)
7 August 1911
Sep
44.7 mm (1.8 in)
15 September 1959
Oct
33.0 mm (1.3 in)
3 October 1927
Nov
53.6 mm (2.1 in)
18 November 1946
Dec
63.5 mm (2.5 in)
5 December 2003
Period of Record Coverage
1895 to 2022
Complete yearUnder 90 percent of days
112 years of record at Libby 1 NE Rs, 1895 to 2022. 17 years have data for under 90 percent of days and are left out of rankings: 1895, 1897, 1911, 1918, 1948, 1949, 1974, 1976 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 86 complete years at Libby 1 NE Rs, 1896 to 2012. Blue stripes are years cooler than the station's own mean of 7.4 C (45.4 F); red stripes are warmer. The coolest year was 1916, at 4.8 C (40.6 F), and the warmest was 1934, at 9.3 C (48.7 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Libby 1 NE Rs as warming stripes, 1896 to 2012
Year
Annual mean temperature
Difference from the station mean
1896
7.5 C
+0.02 C
1912
6.2 C
-1.25 C
1913
5.8 C
-1.62 C
1914
6.8 C
-0.62 C
1915
7.4 C
-0.05 C
1916
4.8 C
-2.66 C
1917
6.4 C
-1.01 C
1918
7.2 C
-0.24 C
1919
6.3 C
-1.17 C
1920
6.7 C
-0.71 C
1921
6.9 C
-0.59 C
1922
6.0 C
-1.41 C
1923
6.9 C
-0.50 C
1924
6.4 C
-1.08 C
1925
8.0 C
+0.56 C
1926
7.9 C
+0.49 C
1927
6.2 C
-1.20 C
1928
6.7 C
-0.72 C
1930
6.7 C
-0.74 C
1931
7.8 C
+0.36 C
1932
7.0 C
-0.43 C
1933
7.5 C
+0.09 C
1934
9.3 C
+1.82 C
1935
6.5 C
-0.93 C
1936
7.0 C
-0.41 C
1937
6.8 C
-0.69 C
1938
8.2 C
+0.71 C
1940
8.6 C
+1.20 C
1941
8.7 C
+1.26 C
1942
7.2 C
-0.20 C
1943
6.4 C
-1.00 C
1944
7.8 C
+0.34 C
1945
7.6 C
+0.11 C
1946
7.1 C
-0.37 C
1949
6.1 C
-1.39 C
1950
6.0 C
-1.45 C
1951
6.1 C
-1.34 C
1952
7.3 C
-0.10 C
1955
5.8 C
-1.60 C
1956
7.0 C
-0.40 C
1957
6.9 C
-0.56 C
1958
8.6 C
+1.18 C
1959
6.8 C
-0.63 C
1960
7.2 C
-0.25 C
1961
7.9 C
+0.47 C
1962
7.6 C
+0.20 C
1963
8.1 C
+0.63 C
1964
6.9 C
-0.53 C
1965
7.4 C
-0.09 C
1966
7.8 C
+0.38 C
1967
8.7 C
+1.21 C
1968
7.4 C
-0.02 C
1969
7.2 C
-0.28 C
1970
7.3 C
-0.18 C
1971
6.9 C
-0.53 C
1972
6.8 C
-0.66 C
1973
7.7 C
+0.21 C
1975
6.6 C
-0.81 C
1977
7.7 C
+0.22 C
1978
7.3 C
-0.17 C
1980
7.5 C
+0.10 C
1981
8.2 C
+0.74 C
1982
7.2 C
-0.27 C
1983
7.8 C
+0.39 C
1984
7.7 C
+0.24 C
1985
6.7 C
-0.78 C
1986
8.5 C
+1.08 C
1987
8.7 C
+1.22 C
1988
8.7 C
+1.30 C
1990
8.4 C
+0.93 C
1991
8.1 C
+0.68 C
1992
8.9 C
+1.48 C
1993
7.2 C
-0.24 C
1999
8.8 C
+1.40 C
2000
8.2 C
+0.71 C
2001
8.8 C
+1.32 C
2003
8.4 C
+0.97 C
2004
8.9 C
+1.46 C
2005
8.0 C
+0.56 C
2006
9.0 C
+1.53 C
2007
8.7 C
+1.29 C
2008
7.7 C
+0.22 C
2009
7.8 C
+0.38 C
2010
8.3 C
+0.88 C
2011
7.8 C
+0.32 C
2012
8.9 C
+1.42 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1896 to 2012. In Fahrenheit: 0.3 F (0.2 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 Libby 1 NE Rs
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1896 to 2012
86
Rise
Mean daily maximum
0.04 C (-0.02 to 0.10) per decade
0.07 F (-0.04 to 0.19) per decade
1896 to 2012
86
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.4 to 0.6) per decade
1896 to 2012
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
1895 to 2022
Yearly extremes at Libby 1 NE Rs: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
2007
38.9 C (102.0 F)
112
Coldest night (TNn)
-43.3 C (-45.9 F)
1924
-27.2 C (-17.0 F)
112
Wettest day (Rx1day)
79.0 mm (3.1 in)
1998
25.4 mm (1.0 in)
112
Wettest five days (Rx5day)
130.9 mm (5.2 in)
2003
44.7 mm (1.8 in)
111
Longest dry spell (CDD)
77 days
1973
29 days
112
Hottest day (TXx)
The hottest day of the year at Libby 1 NE Rs, 1895 to 2022. The record is 43.3 C (109.9 F) in 2007, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Libby 1 NE Rs by year
Year
Hottest day (TXx)
1895
41.7 C (107.1 F)
1896
42.8 C (109.0 F)
1897
30.0 C (86.0 F)
1911
36.7 C (98.1 F)
1912
37.2 C (99.0 F)
1913
37.8 C (100.0 F)
1914
38.3 C (100.9 F)
1915
38.3 C (100.9 F)
1916
37.2 C (99.0 F)
1917
36.7 C (98.1 F)
1918
38.9 C (102.0 F)
1919
40.6 C (105.1 F)
1920
38.3 C (100.9 F)
1921
36.7 C (98.1 F)
1922
38.9 C (102.0 F)
1923
38.9 C (102.0 F)
1924
41.1 C (106.0 F)
1925
38.3 C (100.9 F)
1926
38.9 C (102.0 F)
1927
36.1 C (97.0 F)
1928
40.6 C (105.1 F)
1929
38.9 C (102.0 F)
1930
40.0 C (104.0 F)
1931
40.0 C (104.0 F)
1932
39.4 C (102.9 F)
1933
40.0 C (104.0 F)
1934
42.2 C (108.0 F)
1935
38.9 C (102.0 F)
1936
40.0 C (104.0 F)
1937
38.9 C (102.0 F)
1938
40.0 C (104.0 F)
1939
41.1 C (106.0 F)
1940
41.1 C (106.0 F)
1941
41.7 C (107.1 F)
1942
37.8 C (100.0 F)
1943
37.8 C (100.0 F)
1944
39.4 C (102.9 F)
1945
40.0 C (104.0 F)
1946
39.4 C (102.9 F)
1947
39.4 C (102.9 F)
1948
35.0 C (95.0 F)
1949
40.6 C (105.1 F)
1950
38.9 C (102.0 F)
1951
38.3 C (100.9 F)
1952
38.3 C (100.9 F)
1953
40.6 C (105.1 F)
1954
35.0 C (95.0 F)
1955
36.7 C (98.1 F)
1956
38.9 C (102.0 F)
1957
35.6 C (96.1 F)
1958
38.3 C (100.9 F)
1959
40.6 C (105.1 F)
1960
41.1 C (106.0 F)
1961
42.8 C (109.0 F)
1962
38.9 C (102.0 F)
1963
39.4 C (102.9 F)
1964
38.3 C (100.9 F)
1965
37.8 C (100.0 F)
1966
36.7 C (98.1 F)
1967
41.1 C (106.0 F)
1968
38.3 C (100.9 F)
1969
37.2 C (99.0 F)
1970
38.9 C (102.0 F)
1971
38.9 C (102.0 F)
1972
38.3 C (100.9 F)
1973
39.4 C (102.9 F)
1974
39.4 C (102.9 F)
1975
40.6 C (105.1 F)
1976
37.2 C (99.0 F)
1977
38.9 C (102.0 F)
1978
37.8 C (100.0 F)
1979
37.2 C (99.0 F)
1980
36.7 C (98.1 F)
1981
37.2 C (99.0 F)
1982
36.1 C (97.0 F)
1983
37.2 C (99.0 F)
1984
40.0 C (104.0 F)
1985
40.6 C (105.1 F)
1986
37.2 C (99.0 F)
1987
36.7 C (98.1 F)
1988
37.8 C (100.0 F)
1989
37.2 C (99.0 F)
1990
37.2 C (99.0 F)
1991
38.3 C (100.9 F)
1992
39.4 C (102.9 F)
1993
35.6 C (96.1 F)
1994
42.8 C (109.0 F)
1995
35.0 C (95.0 F)
1996
37.2 C (99.0 F)
1997
36.1 C (97.0 F)
1998
41.7 C (107.1 F)
1999
37.8 C (100.0 F)
2000
40.6 C (105.1 F)
2001
40.6 C (105.1 F)
2002
38.9 C (102.0 F)
2003
40.0 C (104.0 F)
2004
38.3 C (100.9 F)
2005
38.9 C (102.0 F)
2006
40.6 C (105.1 F)
2007
43.3 C (109.9 F)
2008
40.6 C (105.1 F)
2009
39.4 C (102.9 F)
2010
36.1 C (97.0 F)
2011
37.2 C (99.0 F)
2012
37.2 C (99.0 F)
2013
38.9 C (102.0 F)
2014
31.1 C (88.0 F)
2015
41.7 C (107.1 F)
2018
25.6 C (78.1 F)
2020
8.9 C (48.0 F)
2021
41.7 C (107.1 F)
2022
21.1 C (70.0 F)
Coldest night (TNn)
The coldest night of the year at Libby 1 NE Rs, 1895 to 2022. The record is -43.3 C (-45.9 F) in 1924, marked on the chart; the median year is -27.2 C (-17.0 F).
Coldest night (TNn) at Libby 1 NE Rs by year
Year
Coldest night (TNn)
1895
-21.7 C (-7.1 F)
1896
-28.3 C (-18.9 F)
1897
-27.2 C (-17.0 F)
1911
-26.1 C (-15.0 F)
1912
-30.6 C (-23.1 F)
1913
-31.7 C (-25.1 F)
1914
-32.8 C (-27.0 F)
1915
-30.6 C (-23.1 F)
1916
-35.6 C (-32.1 F)
1917
-31.7 C (-25.1 F)
1918
-30.0 C (-22.0 F)
1919
-32.2 C (-26.0 F)
1920
-19.4 C (-2.9 F)
1921
-24.4 C (-11.9 F)
1922
-36.1 C (-33.0 F)
1923
-38.9 C (-38.0 F)
1924
-43.3 C (-45.9 F)
1925
-15.6 C (3.9 F)
1926
-22.8 C (-9.0 F)
1927
-36.1 C (-33.0 F)
1928
-35.6 C (-32.1 F)
1929
-33.9 C (-29.0 F)
1930
-33.9 C (-29.0 F)
1931
-23.3 C (-9.9 F)
1932
-27.2 C (-17.0 F)
1933
-38.3 C (-36.9 F)
1934
-18.9 C (-2.0 F)
1935
-36.7 C (-34.1 F)
1936
-36.7 C (-34.1 F)
1937
-37.2 C (-35.0 F)
1938
-23.9 C (-11.0 F)
1939
-32.2 C (-26.0 F)
1940
-23.3 C (-9.9 F)
1941
-23.3 C (-9.9 F)
1942
-30.0 C (-22.0 F)
1943
-35.6 C (-32.1 F)
1944
-25.0 C (-13.0 F)
1945
-23.9 C (-11.0 F)
1946
-28.3 C (-18.9 F)
1947
-28.3 C (-18.9 F)
1948
-28.9 C (-20.0 F)
1949
-35.0 C (-31.0 F)
1950
-38.9 C (-38.0 F)
1951
-31.1 C (-24.0 F)
1952
-32.2 C (-26.0 F)
1953
-16.1 C (3.0 F)
1954
-35.6 C (-32.1 F)
1955
-28.9 C (-20.0 F)
1956
-31.1 C (-24.0 F)
1957
-35.6 C (-32.1 F)
1958
-21.1 C (-6.0 F)
1959
-30.6 C (-23.1 F)
1960
-28.9 C (-20.0 F)
1961
-30.6 C (-23.1 F)
1962
-32.2 C (-26.0 F)
1963
-31.1 C (-24.0 F)
1964
-33.3 C (-27.9 F)
1965
-22.2 C (-8.0 F)
1966
-18.3 C (-0.9 F)
1967
-18.3 C (-0.9 F)
1968
-39.4 C (-38.9 F)
1969
-29.4 C (-20.9 F)
1970
-25.6 C (-14.1 F)
1971
-25.6 C (-14.1 F)
1972
-31.1 C (-24.0 F)
1973
-30.0 C (-22.0 F)
1974
-26.7 C (-16.1 F)
1975
-26.1 C (-15.0 F)
1976
-23.3 C (-9.9 F)
1977
-23.9 C (-11.0 F)
1978
-35.0 C (-31.0 F)
1979
-34.4 C (-29.9 F)
1980
-30.0 C (-22.0 F)
1981
-26.7 C (-16.1 F)
1982
-26.7 C (-16.1 F)
1983
-32.2 C (-26.0 F)
1984
-20.6 C (-5.1 F)
1985
-27.8 C (-18.0 F)
1986
-19.4 C (-2.9 F)
1987
-18.9 C (-2.0 F)
1988
-20.0 C (-4.0 F)
1989
-21.7 C (-7.1 F)
1990
-32.2 C (-26.0 F)
1991
-20.6 C (-5.1 F)
1992
-17.2 C (1.0 F)
1993
-27.2 C (-17.0 F)
1994
-27.2 C (-17.0 F)
1995
-18.3 C (-0.9 F)
1996
-30.6 C (-23.1 F)
1997
-16.1 C (3.0 F)
1998
-27.8 C (-18.0 F)
1999
-16.7 C (1.9 F)
2000
-15.0 C (5.0 F)
2001
-21.1 C (-6.0 F)
2002
-17.8 C (0.0 F)
2003
-17.2 C (1.0 F)
2004
-27.8 C (-18.0 F)
2005
-26.7 C (-16.1 F)
2006
-24.4 C (-11.9 F)
2007
-22.2 C (-8.0 F)
2008
-26.7 C (-16.1 F)
2009
-25.0 C (-13.0 F)
2010
-23.3 C (-9.9 F)
2011
-23.3 C (-9.9 F)
2012
-16.1 C (3.0 F)
2013
-13.3 C (8.1 F)
2014
-29.4 C (-20.9 F)
2015
-20.0 C (-4.0 F)
2018
1.7 C (35.1 F)
2020
-5.6 C (21.9 F)
2021
2.8 C (37.0 F)
2022
-8.9 C (16.0 F)
Wettest day (Rx1day)
The wettest day of the year at Libby 1 NE Rs, 1895 to 2022. The record is 79.0 mm (3.1 in) in 1998, marked on the chart; the median year is 25.4 mm (1.0 in).
Wettest day (Rx1day) at Libby 1 NE Rs by year
Year
Wettest day (Rx1day)
1895
14.7 mm (0.6 in)
1896
29.5 mm (1.2 in)
1897
12.7 mm (0.5 in)
1911
39.4 mm (1.6 in)
1912
23.6 mm (0.9 in)
1913
11.9 mm (0.5 in)
1914
30.0 mm (1.2 in)
1915
20.3 mm (0.8 in)
1916
30.7 mm (1.2 in)
1917
21.3 mm (0.8 in)
1918
25.4 mm (1.0 in)
1919
24.1 mm (0.9 in)
1920
22.9 mm (0.9 in)
1921
20.3 mm (0.8 in)
1922
31.8 mm (1.3 in)
1923
25.4 mm (1.0 in)
1924
22.9 mm (0.9 in)
1925
14.0 mm (0.6 in)
1926
30.0 mm (1.2 in)
1927
33.0 mm (1.3 in)
1928
21.6 mm (0.9 in)
1929
19.8 mm (0.8 in)
1930
31.2 mm (1.2 in)
1931
16.5 mm (0.6 in)
1932
25.7 mm (1.0 in)
1933
41.7 mm (1.6 in)
1934
29.0 mm (1.1 in)
1935
20.3 mm (0.8 in)
1936
22.9 mm (0.9 in)
1937
20.1 mm (0.8 in)
1938
17.5 mm (0.7 in)
1939
15.7 mm (0.6 in)
1940
25.9 mm (1.0 in)
1941
26.7 mm (1.1 in)
1942
26.4 mm (1.0 in)
1943
21.8 mm (0.9 in)
1944
25.9 mm (1.0 in)
1945
23.9 mm (0.9 in)
1946
53.6 mm (2.1 in)
1947
27.9 mm (1.1 in)
1948
30.7 mm (1.2 in)
1949
22.6 mm (0.9 in)
1950
20.8 mm (0.8 in)
1951
21.6 mm (0.9 in)
1952
26.2 mm (1.0 in)
1953
51.8 mm (2.0 in)
1954
34.0 mm (1.3 in)
1955
35.3 mm (1.4 in)
1956
15.2 mm (0.6 in)
1957
26.7 mm (1.1 in)
1958
34.0 mm (1.3 in)
1959
44.7 mm (1.8 in)
1960
28.2 mm (1.1 in)
1961
25.9 mm (1.0 in)
1962
17.3 mm (0.7 in)
1963
20.8 mm (0.8 in)
1964
35.3 mm (1.4 in)
1965
22.6 mm (0.9 in)
1966
30.0 mm (1.2 in)
1967
26.4 mm (1.0 in)
1968
17.3 mm (0.7 in)
1969
27.7 mm (1.1 in)
1970
22.1 mm (0.9 in)
1971
24.9 mm (1.0 in)
1972
22.6 mm (0.9 in)
1973
18.5 mm (0.7 in)
1974
25.4 mm (1.0 in)
1975
15.5 mm (0.6 in)
1976
12.7 mm (0.5 in)
1977
17.8 mm (0.7 in)
1978
22.6 mm (0.9 in)
1979
25.7 mm (1.0 in)
1980
31.2 mm (1.2 in)
1981
23.9 mm (0.9 in)
1982
19.1 mm (0.8 in)
1983
24.6 mm (1.0 in)
1984
55.4 mm (2.2 in)
1985
23.1 mm (0.9 in)
1986
31.5 mm (1.2 in)
1987
42.7 mm (1.7 in)
1988
27.9 mm (1.1 in)
1989
34.8 mm (1.4 in)
1990
51.3 mm (2.0 in)
1991
25.4 mm (1.0 in)
1992
34.5 mm (1.4 in)
1993
18.0 mm (0.7 in)
1994
31.2 mm (1.2 in)
1995
28.4 mm (1.1 in)
1996
28.2 mm (1.1 in)
1997
27.7 mm (1.1 in)
1998
79.0 mm (3.1 in)
1999
17.5 mm (0.7 in)
2000
23.1 mm (0.9 in)
2001
38.1 mm (1.5 in)
2002
29.5 mm (1.2 in)
2003
63.5 mm (2.5 in)
2004
21.1 mm (0.8 in)
2005
26.7 mm (1.1 in)
2006
20.1 mm (0.8 in)
2007
27.2 mm (1.1 in)
2008
21.6 mm (0.9 in)
2009
21.3 mm (0.8 in)
2010
27.4 mm (1.1 in)
2011
17.0 mm (0.7 in)
2012
29.2 mm (1.1 in)
2013
19.1 mm (0.8 in)
2014
17.0 mm (0.7 in)
2015
37.1 mm (1.5 in)
2018
2.3 mm (0.09 in)
2020
0.0 mm (0.00 in)
2021
7.9 mm (0.31 in)
2022
26.9 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Libby 1 NE Rs, 1895 to 2022. The record is 130.9 mm (5.2 in) in 2003, marked on the chart; the median year is 44.7 mm (1.8 in).
Wettest five days (Rx5day) at Libby 1 NE Rs by year
Year
Wettest five days (Rx5day)
1895
29.7 mm (1.2 in)
1896
94.0 mm (3.7 in)
1897
25.7 mm (1.0 in)
1911
50.1 mm (2.0 in)
1912
52.1 mm (2.1 in)
1913
32.7 mm (1.3 in)
1914
40.1 mm (1.6 in)
1915
47.5 mm (1.9 in)
1916
45.7 mm (1.8 in)
1917
44.9 mm (1.8 in)
1918
41.2 mm (1.6 in)
1919
43.4 mm (1.7 in)
1920
34.8 mm (1.4 in)
1921
40.4 mm (1.6 in)
1922
43.6 mm (1.7 in)
1923
57.2 mm (2.3 in)
1924
47.3 mm (1.9 in)
1925
35.9 mm (1.4 in)
1926
35.1 mm (1.4 in)
1927
46.2 mm (1.8 in)
1928
31.5 mm (1.2 in)
1929
56.8 mm (2.2 in)
1930
66.3 mm (2.6 in)
1931
32.7 mm (1.3 in)
1932
44.7 mm (1.8 in)
1933
96.6 mm (3.8 in)
1934
72.4 mm (2.9 in)
1935
22.3 mm (0.9 in)
1936
41.9 mm (1.6 in)
1937
48.0 mm (1.9 in)
1938
22.9 mm (0.9 in)
1939
36.0 mm (1.4 in)
1940
41.6 mm (1.6 in)
1941
48.4 mm (1.9 in)
1942
44.7 mm (1.8 in)
1943
40.7 mm (1.6 in)
1944
36.6 mm (1.4 in)
1945
42.2 mm (1.7 in)
1946
94.7 mm (3.7 in)
1947
70.9 mm (2.8 in)
1948
47.7 mm (1.9 in)
1949
35.8 mm (1.4 in)
1950
45.0 mm (1.8 in)
1951
46.8 mm (1.8 in)
1952
46.3 mm (1.8 in)
1953
86.9 mm (3.4 in)
1954
42.0 mm (1.7 in)
1955
67.1 mm (2.6 in)
1956
32.0 mm (1.3 in)
1957
59.7 mm (2.4 in)
1958
43.9 mm (1.7 in)
1959
62.5 mm (2.5 in)
1960
39.6 mm (1.6 in)
1961
55.4 mm (2.2 in)
1962
32.3 mm (1.3 in)
1963
39.6 mm (1.6 in)
1964
79.4 mm (3.1 in)
1965
37.4 mm (1.5 in)
1966
64.3 mm (2.5 in)
1967
28.9 mm (1.1 in)
1968
45.3 mm (1.8 in)
1969
60.2 mm (2.4 in)
1970
42.2 mm (1.7 in)
1971
50.6 mm (2.0 in)
1972
45.7 mm (1.8 in)
1973
54.6 mm (2.1 in)
1974
93.0 mm (3.7 in)
1975
35.8 mm (1.4 in)
1976
33.0 mm (1.3 in)
1977
35.5 mm (1.4 in)
1978
37.1 mm (1.5 in)
1979
38.3 mm (1.5 in)
1980
49.5 mm (1.9 in)
1981
46.2 mm (1.8 in)
1982
46.2 mm (1.8 in)
1983
34.0 mm (1.3 in)
1984
58.2 mm (2.3 in)
1985
39.6 mm (1.6 in)
1986
53.8 mm (2.1 in)
1987
65.8 mm (2.6 in)
1988
31.0 mm (1.2 in)
1989
54.3 mm (2.1 in)
1990
105.5 mm (4.2 in)
1991
42.4 mm (1.7 in)
1992
47.4 mm (1.9 in)
1993
33.5 mm (1.3 in)
1994
40.5 mm (1.6 in)
1995
53.0 mm (2.1 in)
1996
74.1 mm (2.9 in)
1997
37.6 mm (1.5 in)
1998
106.2 mm (4.2 in)
1999
52.8 mm (2.1 in)
2000
36.2 mm (1.4 in)
2001
38.1 mm (1.5 in)
2002
54.9 mm (2.2 in)
2003
130.9 mm (5.2 in)
2004
38.7 mm (1.5 in)
2005
48.8 mm (1.9 in)
2006
59.2 mm (2.3 in)
2007
62.2 mm (2.4 in)
2008
39.3 mm (1.5 in)
2009
40.2 mm (1.6 in)
2010
44.9 mm (1.8 in)
2011
38.3 mm (1.5 in)
2012
48.8 mm (1.9 in)
2013
33.3 mm (1.3 in)
2014
41.4 mm (1.6 in)
2015
42.5 mm (1.7 in)
2018
n/a
2020
0.0 mm (0.00 in)
2021
8.7 mm (0.34 in)
2022
0.5 mm (0.02 in)
Longest dry spell (CDD)
The longest dry spell of the year at Libby 1 NE Rs, 1895 to 2022. The record is 77 days in 1973, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at Libby 1 NE Rs by year
Year
Longest dry spell (CDD)
1895
34 days
1896
34 days
1897
20 days
1911
23 days
1912
23 days
1913
42 days
1914
32 days
1915
24 days
1916
21 days
1917
43 days
1918
16 days
1919
24 days
1920
19 days
1921
36 days
1922
32 days
1923
25 days
1924
38 days
1925
29 days
1926
46 days
1927
35 days
1928
35 days
1929
26 days
1930
51 days
1931
30 days
1932
37 days
1933
25 days
1934
45 days
1935
25 days
1936
44 days
1937
18 days
1938
37 days
1939
49 days
1940
27 days
1941
33 days
1942
28 days
1943
35 days
1944
29 days
1945
44 days
1946
45 days
1947
26 days
1948
30 days
1949
25 days
1950
23 days
1951
31 days
1952
30 days
1953
40 days
1954
21 days
1955
46 days
1956
22 days
1957
22 days
1958
19 days
1959
44 days
1960
32 days
1961
17 days
1962
29 days
1963
29 days
1964
25 days
1965
28 days
1966
24 days
1967
58 days
1968
24 days
1969
74 days
1970
28 days
1971
17 days
1972
17 days
1973
77 days
1974
45 days
1975
19 days
1976
19 days
1977
24 days
1978
28 days
1979
40 days
1980
22 days
1981
26 days
1982
23 days
1983
17 days
1984
34 days
1985
32 days
1986
33 days
1987
69 days
1988
19 days
1989
19 days
1990
37 days
1991
39 days
1992
19 days
1993
24 days
1994
39 days
1995
23 days
1996
26 days
1997
21 days
1998
28 days
1999
42 days
2000
32 days
2001
37 days
2002
34 days
2003
35 days
2004
32 days
2005
31 days
2006
35 days
2007
32 days
2008
26 days
2009
36 days
2010
31 days
2011
36 days
2012
26 days
2013
33 days
2014
17 days
2015
34 days
2018
3 days
2020
10 days
2021
10 days
2022
11 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 Libby 1 NE Rs falls on 5 June and the median first autumn frost on 7 September, which leaves a median of 90 days between them.
In 1973 to 2012 the median growing season was 107 days. That is 22 days more than in 1896 to 1942.
Fitted over all years, the growing season changes by +3.2 days per decade at this station.
Frost dates and growing season at Libby 1 NE Rs
Measure
Median, all years
Earliest period (1896 to 1942)
Recent period (1973 to 2012)
Recent against earliest
Fitted trend
Last spring frost
5 June
8 June
2 June
6 days earlier
-1.2 days per decade
First autumn frost
7 September
5 September
11 September
6 days later
+2.0 days per decade
Growing days
90 days
85 days
107 days
22 days more
+3.2 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
95 years, 1896 to 2013
A day with at least 24.7 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 67.6 mm (2.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Libby 1 NE Rs: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
24.7 mm (1.0 in)
5 years
33.0 mm (1.3 in)
10 years
39.6 mm (1.6 in)
25 years
49.4 mm (1.9 in)
50 years
57.9 mm (2.3 in)
100 years
67.6 mm (2.7 in)
Longer than the 95 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, 95 years of values from 1896 to 2013.
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: 79.0 mm (3.1 in) in 1998; 63.5 mm (2.5 in) in 2003; 55.4 mm (2.2 in) in 1984.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Libby 1 NE Rs standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Libby 1 NE Rs 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.