Record envelope, standing records and threshold days for Kooskia (USC00105011), Idaho, United States, with 80 years of record.
Key Facts for Kooskia
Kooskia (USC00105011) is a weather station in Idaho, United States at 46.15 latitude and -115.98 longitude, 390 m (1,280 ft) above sea level.
The station reports from 1908 to 1987, 80 years of record.
1,464 records set at Kooskia still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Kooskia set a daily record precipitation of 7.6 mm (0.30 in) on 22 July 1987.
About the Station
Location: Idaho, United States, 46.15 latitude, -115.98 longitude.
Elevation: 390 m (1,280 ft).
Period of record: 1908 to 1987, 80 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 Kooskia. 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 Kooskia, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-33.3 C (-27.9 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-30.6 C (-23.1 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-17.8 C (0.0 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-7.2 C (19.0 F)
n/a
n/a
May
40.0 C (104.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
46.7 C (116.1 F)
-3.3 C (26.1 F)
n/a
n/a
Aug
45.6 C (114.1 F)
0.6 C (33.1 F)
n/a
n/a
Sep
41.7 C (107.1 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-23.3 C (-9.9 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Kooskia still stand. 1934 holds the most, with 46.
Standing records at Kooskia by the year they were set
Year set
Standing records
1909
31
1910
14
1911
18
1912
15
1913
29
1914
21
1915
6
1916
33
1917
23
1918
27
1919
43
1920
17
1921
16
1922
22
1923
19
1924
33
1925
9
1926
28
1927
18
1928
14
1929
25
1930
26
1931
24
1932
19
1933
36
1934
46
1935
27
1936
32
1937
33
1938
19
1939
15
1940
16
1941
15
1942
16
1943
13
1944
14
1945
20
1946
15
1947
12
1948
16
1949
25
1950
23
1951
14
1952
7
1953
20
1954
22
1955
23
1956
13
1957
13
1958
13
1959
9
1960
22
1961
16
1962
15
1963
7
1964
10
1965
20
1966
12
1967
12
1968
24
1969
11
1970
19
1971
18
1972
18
1973
9
1974
12
1975
17
1976
15
1977
16
1978
12
1979
12
1980
12
1981
12
1982
12
1983
23
1984
12
1985
16
1986
16
1987
7
All-Time Record Progression
1 new records
1 all-time records were set at Kooskia between 25 May 1980 and 25 May 1980. Each dot is a new record.
When Kooskia set new all-time records
Date
Kind
Detail
1980-05-25
Record daily precipitation
Record daily precipitation 54.1 mm (2.1 in)
Wettest Day of Each Month
May: 54.1 mm (2.1 in)
The wettest day on record for each calendar month at Kooskia. The most was 54.1 mm (2.1 in) on 25 May 1980.
Record daily precipitation for each month at Kooskia
Month
Record daily precipitation (mm)
Date
Jan
35.8 mm (1.4 in)
23 January 1982
Feb
43.7 mm (1.7 in)
7 February 1938
Mar
32.0 mm (1.3 in)
25 March 1948
Apr
38.1 mm (1.5 in)
2 April 1965
May
54.1 mm (2.1 in)
25 May 1980
Jun
44.2 mm (1.7 in)
24 June 1955
Jul
53.3 mm (2.1 in)
27 July 1909
Aug
50.5 mm (2.0 in)
1 August 1960
Sep
37.8 mm (1.5 in)
23 September 1917
Oct
48.8 mm (1.9 in)
3 October 1940
Nov
44.5 mm (1.8 in)
21 November 1921
Dec
37.1 mm (1.5 in)
7 December 1975
Period of Record Coverage
1908 to 1987
Complete yearUnder 90 percent of days
80 years of record at Kooskia, 1908 to 1987. 9 years have data for under 90 percent of days and are left out of rankings: 1908, 1910, 1914, 1915, 1916, 1917, 1918, 1923 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 66 complete years at Kooskia, 1909 to 1985. Blue stripes are years cooler than the station's own mean of 10.2 C (50.3 F); red stripes are warmer. The coolest year was 1919, at 8.3 C (47.0 F), and the warmest was 1958, at 11.5 C (52.7 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Kooskia as warming stripes, 1909 to 1985
Year
Annual mean temperature
Difference from the station mean
1909
9.5 C
-0.71 C
1912
9.7 C
-0.51 C
1913
8.7 C
-1.50 C
1919
8.3 C
-1.83 C
1920
9.9 C
-0.24 C
1921
10.6 C
+0.46 C
1922
9.6 C
-0.58 C
1924
9.9 C
-0.31 C
1927
9.9 C
-0.24 C
1928
10.8 C
+0.67 C
1929
9.6 C
-0.58 C
1930
10.1 C
-0.04 C
1931
10.7 C
+0.50 C
1932
9.9 C
-0.29 C
1933
10.7 C
+0.53 C
1935
10.2 C
-0.02 C
1936
10.7 C
+0.53 C
1937
10.4 C
+0.18 C
1938
10.9 C
+0.73 C
1939
11.1 C
+0.88 C
1940
11.3 C
+1.15 C
1941
11.0 C
+0.86 C
1942
10.2 C
+0.02 C
1943
10.0 C
-0.15 C
1944
10.3 C
+0.15 C
1945
10.8 C
+0.62 C
1946
11.1 C
+0.89 C
1947
11.1 C
+0.93 C
1948
9.9 C
-0.24 C
1949
9.8 C
-0.42 C
1950
10.1 C
-0.12 C
1951
10.3 C
+0.16 C
1952
10.4 C
+0.22 C
1953
11.3 C
+1.13 C
1954
10.3 C
+0.14 C
1955
9.2 C
-0.99 C
1956
10.1 C
-0.07 C
1957
9.9 C
-0.25 C
1958
11.5 C
+1.33 C
1959
9.7 C
-0.49 C
1960
9.6 C
-0.54 C
1961
10.6 C
+0.41 C
1962
10.6 C
+0.42 C
1963
10.5 C
+0.34 C
1964
9.2 C
-1.00 C
1965
10.1 C
-0.11 C
1966
11.0 C
+0.87 C
1967
11.2 C
+1.07 C
1968
10.2 C
+0.05 C
1969
9.9 C
-0.28 C
1970
10.1 C
-0.08 C
1971
10.0 C
-0.15 C
1972
10.1 C
-0.12 C
1973
10.4 C
+0.18 C
1974
10.6 C
+0.39 C
1975
9.0 C
-1.13 C
1976
9.0 C
-1.13 C
1977
9.8 C
-0.35 C
1978
9.8 C
-0.33 C
1979
10.0 C
-0.18 C
1980
10.5 C
+0.32 C
1981
10.8 C
+0.61 C
1982
9.2 C
-1.01 C
1983
10.2 C
+0.04 C
1984
10.5 C
+0.34 C
1985
9.2 C
-0.95 C
The fitted trend in annual mean temperature here over 1909 to 1985 is 0.01 C (-0.07 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.03 F (-0.12 to 0.17) per decade. The slope is a straight line fitted to 66 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Kooskia
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.07 to 0.09) per decade
0.03 F (-0.12 to 0.17) per decade
1909 to 1985
66
Not clearly different from zero
Mean daily maximum
-0.01 C (-0.10 to 0.09) per decade
-0.01 F (-0.19 to 0.16) per decade
1909 to 1985
66
Not clearly different from zero
Mean daily minimum
0.04 C (-0.06 to 0.13) per decade
0.1 F (-0.1 to 0.2) per decade
1909 to 1985
66
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
1908 to 1987
Yearly extremes at Kooskia: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.7 C (116.1 F)
1934
41.1 C (106.0 F)
80
Coldest night (TNn)
-33.3 C (-27.9 F)
1937
-19.7 C (-3.5 F)
80
Wettest day (Rx1day)
54.1 mm (2.1 in)
1980
31.9 mm (1.3 in)
80
Wettest five days (Rx5day)
113.5 mm (4.5 in)
1962
53.8 mm (2.1 in)
80
Longest dry spell (CDD)
74 days
1914
30 days
80
Hottest day (TXx)
The hottest day of the year at Kooskia, 1908 to 1987. The record is 46.7 C (116.1 F) in 1934, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Kooskia by year
Year
Hottest day (TXx)
1908
15.6 C (60.1 F)
1909
42.2 C (108.0 F)
1910
40.6 C (105.1 F)
1911
38.3 C (100.9 F)
1912
39.4 C (102.9 F)
1913
39.4 C (102.9 F)
1914
43.3 C (109.9 F)
1915
37.8 C (100.0 F)
1916
41.1 C (106.0 F)
1917
39.4 C (102.9 F)
1918
43.9 C (111.0 F)
1919
40.0 C (104.0 F)
1920
41.1 C (106.0 F)
1921
40.6 C (105.1 F)
1922
45.0 C (113.0 F)
1923
42.2 C (108.0 F)
1924
42.2 C (108.0 F)
1925
41.1 C (106.0 F)
1926
41.7 C (107.1 F)
1927
40.6 C (105.1 F)
1928
44.4 C (111.9 F)
1929
42.8 C (109.0 F)
1930
42.8 C (109.0 F)
1931
44.4 C (111.9 F)
1932
42.2 C (108.0 F)
1933
44.4 C (111.9 F)
1934
46.7 C (116.1 F)
1935
43.3 C (109.9 F)
1936
43.3 C (109.9 F)
1937
42.2 C (108.0 F)
1938
41.7 C (107.1 F)
1939
43.9 C (111.0 F)
1940
41.7 C (107.1 F)
1941
41.7 C (107.1 F)
1942
41.7 C (107.1 F)
1943
38.3 C (100.9 F)
1944
39.4 C (102.9 F)
1945
41.7 C (107.1 F)
1946
41.7 C (107.1 F)
1947
40.0 C (104.0 F)
1948
37.8 C (100.0 F)
1949
42.8 C (109.0 F)
1950
40.6 C (105.1 F)
1951
41.1 C (106.0 F)
1952
38.9 C (102.0 F)
1953
43.9 C (111.0 F)
1954
37.2 C (99.0 F)
1955
42.2 C (108.0 F)
1956
40.6 C (105.1 F)
1957
38.3 C (100.9 F)
1958
40.0 C (104.0 F)
1959
43.9 C (111.0 F)
1960
42.2 C (108.0 F)
1961
45.6 C (114.1 F)
1962
41.1 C (106.0 F)
1963
41.1 C (106.0 F)
1964
39.4 C (102.9 F)
1965
41.7 C (107.1 F)
1966
42.2 C (108.0 F)
1967
43.9 C (111.0 F)
1968
40.0 C (104.0 F)
1969
42.2 C (108.0 F)
1970
41.7 C (107.1 F)
1971
40.6 C (105.1 F)
1972
40.6 C (105.1 F)
1973
40.6 C (105.1 F)
1974
39.4 C (102.9 F)
1975
41.7 C (107.1 F)
1976
37.8 C (100.0 F)
1977
40.6 C (105.1 F)
1978
39.4 C (102.9 F)
1979
41.1 C (106.0 F)
1980
40.6 C (105.1 F)
1981
40.0 C (104.0 F)
1982
38.9 C (102.0 F)
1983
42.2 C (108.0 F)
1984
41.1 C (106.0 F)
1985
42.8 C (109.0 F)
1986
41.1 C (106.0 F)
1987
40.0 C (104.0 F)
Coldest night (TNn)
The coldest night of the year at Kooskia, 1908 to 1987. The record is -33.3 C (-27.9 F) in 1937, marked on the chart; the median year is -19.7 C (-3.5 F).
Coldest night (TNn) at Kooskia by year
Year
Coldest night (TNn)
1908
-14.4 C (6.1 F)
1909
-28.3 C (-18.9 F)
1910
-20.0 C (-4.0 F)
1911
-14.4 C (6.1 F)
1912
-27.8 C (-18.0 F)
1913
-28.3 C (-18.9 F)
1914
-18.9 C (-2.0 F)
1915
-18.9 C (-2.0 F)
1916
-27.2 C (-17.0 F)
1917
-18.9 C (-2.0 F)
1918
-17.8 C (0.0 F)
1919
-29.4 C (-20.9 F)
1920
-17.2 C (1.0 F)
1921
-16.7 C (1.9 F)
1922
-27.8 C (-18.0 F)
1923
-18.9 C (-2.0 F)
1924
-28.3 C (-18.9 F)
1925
-9.4 C (15.1 F)
1926
-18.3 C (-0.9 F)
1927
-22.2 C (-8.0 F)
1928
-13.9 C (7.0 F)
1929
-25.6 C (-14.1 F)
1930
-30.6 C (-23.1 F)
1931
-18.3 C (-0.9 F)
1932
-22.8 C (-9.0 F)
1933
-20.6 C (-5.1 F)
1934
-6.7 C (19.9 F)
1935
-25.0 C (-13.0 F)
1936
-23.3 C (-9.9 F)
1937
-33.3 C (-27.9 F)
1938
-13.3 C (8.1 F)
1939
-7.8 C (18.0 F)
1940
-13.9 C (7.0 F)
1941
-12.2 C (10.0 F)
1942
-23.3 C (-9.9 F)
1943
-21.1 C (-6.0 F)
1944
-14.4 C (6.1 F)
1945
-15.6 C (3.9 F)
1946
-11.1 C (12.0 F)
1947
-20.6 C (-5.1 F)
1948
-21.1 C (-6.0 F)
1949
-30.6 C (-23.1 F)
1950
-30.6 C (-23.1 F)
1951
-19.4 C (-2.9 F)
1952
-18.9 C (-2.0 F)
1953
-6.7 C (19.9 F)
1954
-23.3 C (-9.9 F)
1955
-23.3 C (-9.9 F)
1956
-20.6 C (-5.1 F)
1957
-28.9 C (-20.0 F)
1958
-12.2 C (10.0 F)
1959
-21.1 C (-6.0 F)
1960
-24.4 C (-11.9 F)
1961
-18.3 C (-0.9 F)
1962
-23.3 C (-9.9 F)
1963
-23.3 C (-9.9 F)
1964
-26.7 C (-16.1 F)
1965
-15.6 C (3.9 F)
1966
-10.0 C (14.0 F)
1967
-16.1 C (3.0 F)
1968
-26.7 C (-16.1 F)
1969
-22.2 C (-8.0 F)
1970
-17.2 C (1.0 F)
1971
-12.8 C (9.0 F)
1972
-25.6 C (-14.1 F)
1973
-22.8 C (-9.0 F)
1974
-23.3 C (-9.9 F)
1975
-17.2 C (1.0 F)
1976
-17.2 C (1.0 F)
1977
-19.4 C (-2.9 F)
1978
-22.2 C (-8.0 F)
1979
-27.2 C (-17.0 F)
1980
-18.9 C (-2.0 F)
1981
-17.2 C (1.0 F)
1982
-19.4 C (-2.9 F)
1983
-26.1 C (-15.0 F)
1984
-17.8 C (0.0 F)
1985
-20.6 C (-5.1 F)
1986
-12.2 C (10.0 F)
1987
-16.1 C (3.0 F)
Wettest day (Rx1day)
The wettest day of the year at Kooskia, 1908 to 1987. The record is 54.1 mm (2.1 in) in 1980, marked on the chart; the median year is 31.9 mm (1.3 in).
Wettest day (Rx1day) at Kooskia by year
Year
Wettest day (Rx1day)
1908
11.2 mm (0.4 in)
1909
53.3 mm (2.1 in)
1910
37.1 mm (1.5 in)
1911
35.6 mm (1.4 in)
1912
27.9 mm (1.1 in)
1913
26.7 mm (1.1 in)
1914
31.8 mm (1.3 in)
1915
31.8 mm (1.3 in)
1916
21.1 mm (0.8 in)
1917
37.8 mm (1.5 in)
1918
26.2 mm (1.0 in)
1919
30.5 mm (1.2 in)
1920
33.0 mm (1.3 in)
1921
44.5 mm (1.8 in)
1922
24.4 mm (1.0 in)
1923
35.1 mm (1.4 in)
1924
27.9 mm (1.1 in)
1925
42.2 mm (1.7 in)
1926
30.5 mm (1.2 in)
1927
41.4 mm (1.6 in)
1928
34.5 mm (1.4 in)
1929
21.3 mm (0.8 in)
1930
21.1 mm (0.8 in)
1931
31.5 mm (1.2 in)
1932
39.6 mm (1.6 in)
1933
34.3 mm (1.4 in)
1934
17.0 mm (0.7 in)
1935
24.6 mm (1.0 in)
1936
18.5 mm (0.7 in)
1937
27.4 mm (1.1 in)
1938
43.7 mm (1.7 in)
1939
27.7 mm (1.1 in)
1940
48.8 mm (1.9 in)
1941
23.9 mm (0.9 in)
1942
26.9 mm (1.1 in)
1943
31.0 mm (1.2 in)
1944
21.3 mm (0.8 in)
1945
25.9 mm (1.0 in)
1946
25.9 mm (1.0 in)
1947
37.8 mm (1.5 in)
1948
39.1 mm (1.5 in)
1949
33.8 mm (1.3 in)
1950
34.8 mm (1.4 in)
1951
33.5 mm (1.3 in)
1952
38.6 mm (1.5 in)
1953
35.1 mm (1.4 in)
1954
40.4 mm (1.6 in)
1955
44.2 mm (1.7 in)
1956
32.0 mm (1.3 in)
1957
43.4 mm (1.7 in)
1958
32.0 mm (1.3 in)
1959
29.0 mm (1.1 in)
1960
50.5 mm (2.0 in)
1961
27.2 mm (1.1 in)
1962
45.2 mm (1.8 in)
1963
32.3 mm (1.3 in)
1964
37.6 mm (1.5 in)
1965
38.1 mm (1.5 in)
1966
29.2 mm (1.1 in)
1967
31.2 mm (1.2 in)
1968
39.1 mm (1.5 in)
1969
39.1 mm (1.5 in)
1970
28.7 mm (1.1 in)
1971
22.9 mm (0.9 in)
1972
22.9 mm (0.9 in)
1973
33.5 mm (1.3 in)
1974
20.3 mm (0.8 in)
1975
37.1 mm (1.5 in)
1976
22.4 mm (0.9 in)
1977
27.7 mm (1.1 in)
1978
32.0 mm (1.3 in)
1979
47.5 mm (1.9 in)
1980
54.1 mm (2.1 in)
1981
32.8 mm (1.3 in)
1982
35.8 mm (1.4 in)
1983
27.9 mm (1.1 in)
1984
27.9 mm (1.1 in)
1985
27.9 mm (1.1 in)
1986
22.9 mm (0.9 in)
1987
20.3 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Kooskia, 1908 to 1987. The record is 113.5 mm (4.5 in) in 1962, marked on the chart; the median year is 53.8 mm (2.1 in).
Wettest five days (Rx5day) at Kooskia by year
Year
Wettest five days (Rx5day)
1908
24.7 mm (1.0 in)
1909
79.4 mm (3.1 in)
1910
62.9 mm (2.5 in)
1911
59.5 mm (2.3 in)
1912
58.4 mm (2.3 in)
1913
63.5 mm (2.5 in)
1914
49.1 mm (1.9 in)
1915
63.8 mm (2.5 in)
1916
44.7 mm (1.8 in)
1917
63.2 mm (2.5 in)
1918
37.6 mm (1.5 in)
1919
54.6 mm (2.1 in)
1920
52.6 mm (2.1 in)
1921
64.8 mm (2.6 in)
1922
43.4 mm (1.7 in)
1923
64.8 mm (2.6 in)
1924
67.6 mm (2.7 in)
1925
49.7 mm (2.0 in)
1926
44.4 mm (1.7 in)
1927
102.4 mm (4.0 in)
1928
63.2 mm (2.5 in)
1929
51.2 mm (2.0 in)
1930
44.2 mm (1.7 in)
1931
66.3 mm (2.6 in)
1932
65.0 mm (2.6 in)
1933
44.2 mm (1.7 in)
1934
44.2 mm (1.7 in)
1935
43.4 mm (1.7 in)
1936
34.0 mm (1.3 in)
1937
48.9 mm (1.9 in)
1938
60.2 mm (2.4 in)
1939
49.7 mm (2.0 in)
1940
80.2 mm (3.2 in)
1941
51.5 mm (2.0 in)
1942
57.4 mm (2.3 in)
1943
50.2 mm (2.0 in)
1944
51.5 mm (2.0 in)
1945
45.8 mm (1.8 in)
1946
43.7 mm (1.7 in)
1947
60.9 mm (2.4 in)
1948
69.9 mm (2.8 in)
1949
47.8 mm (1.9 in)
1950
42.1 mm (1.7 in)
1951
39.4 mm (1.6 in)
1952
53.9 mm (2.1 in)
1953
67.6 mm (2.7 in)
1954
52.9 mm (2.1 in)
1955
69.1 mm (2.7 in)
1956
49.3 mm (1.9 in)
1957
73.4 mm (2.9 in)
1958
55.9 mm (2.2 in)
1959
53.7 mm (2.1 in)
1960
52.3 mm (2.1 in)
1961
58.2 mm (2.3 in)
1962
113.5 mm (4.5 in)
1963
57.7 mm (2.3 in)
1964
87.4 mm (3.4 in)
1965
44.9 mm (1.8 in)
1966
52.8 mm (2.1 in)
1967
57.8 mm (2.3 in)
1968
61.7 mm (2.4 in)
1969
64.0 mm (2.5 in)
1970
59.9 mm (2.4 in)
1971
53.9 mm (2.1 in)
1972
36.3 mm (1.4 in)
1973
44.6 mm (1.8 in)
1974
28.7 mm (1.1 in)
1975
58.6 mm (2.3 in)
1976
40.9 mm (1.6 in)
1977
48.9 mm (1.9 in)
1978
48.8 mm (1.9 in)
1979
77.6 mm (3.1 in)
1980
90.7 mm (3.6 in)
1981
58.4 mm (2.3 in)
1982
57.9 mm (2.3 in)
1983
42.2 mm (1.7 in)
1984
50.8 mm (2.0 in)
1985
61.1 mm (2.4 in)
1986
43.2 mm (1.7 in)
1987
50.7 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Kooskia, 1908 to 1987. The record is 74 days in 1914, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Kooskia by year
Year
Longest dry spell (CDD)
1908
10 days
1909
23 days
1910
29 days
1911
32 days
1912
17 days
1913
33 days
1914
74 days
1915
42 days
1916
18 days
1917
72 days
1918
28 days
1919
63 days
1920
39 days
1921
21 days
1922
30 days
1923
33 days
1924
26 days
1925
20 days
1926
32 days
1927
19 days
1928
37 days
1929
51 days
1930
36 days
1931
65 days
1932
38 days
1933
25 days
1934
43 days
1935
25 days
1936
32 days
1937
26 days
1938
23 days
1939
36 days
1940
37 days
1941
16 days
1942
54 days
1943
32 days
1944
20 days
1945
49 days
1946
23 days
1947
53 days
1948
23 days
1949
28 days
1950
19 days
1951
28 days
1952
38 days
1953
34 days
1954
25 days
1955
44 days
1956
21 days
1957
33 days
1958
40 days
1959
24 days
1960
30 days
1961
50 days
1962
29 days
1963
26 days
1964
17 days
1965
23 days
1966
45 days
1967
54 days
1968
19 days
1969
69 days
1970
36 days
1971
32 days
1972
24 days
1973
21 days
1974
39 days
1975
16 days
1976
20 days
1977
27 days
1978
30 days
1979
41 days
1980
34 days
1981
37 days
1982
15 days
1983
22 days
1984
24 days
1985
34 days
1986
24 days
1987
23 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
66 years with a frost
Across 66 years with a frost, the median last spring frost at Kooskia falls on 9 May and the median first autumn frost on 25 September, which leaves a median of 142 days between them.
In 1956 to 1985 the median growing season was 134 days. That is 12 days fewer than in 1909 to 1949.
Fitted over all years, the growing season changes by -3.0 days per decade at this station.
Frost dates and growing season at Kooskia
Measure
Median, all years
Earliest period (1909 to 1949)
Recent period (1956 to 1985)
Recent against earliest
Fitted trend
Last spring frost
9 May
6 May
14 May
8 days later
+1.7 days per decade
First autumn frost
25 September
26 September
24 September
2 days earlier
-1.3 days per decade
Growing days
142 days
146 days
134 days
12 days fewer
-3.0 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
74 years, 1909 to 1986
A day with at least 31.8 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 56.2 mm (2.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Kooskia: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
31.8 mm (1.3 in)
5 years
39.4 mm (1.6 in)
10 years
44.0 mm (1.7 in)
25 years
49.3 mm (1.9 in)
50 years
52.9 mm (2.1 in)
100 years
56.2 mm (2.2 in)
Longer than the 74 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, 74 years of values from 1909 to 1986.
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: 54.1 mm (2.1 in) in 1980; 53.3 mm (2.1 in) in 1909; 50.5 mm (2.0 in) in 1960.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Kooskia standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Kooskia 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.