Record envelope, standing records and threshold days for Colby (USC00141696), Kansas, United States, with 65 years of record.
Key Facts for Colby
Colby (USC00141696) is a weather station in Kansas, United States at 39.40 latitude and -101.05 longitude, 958 m (3,143 ft) above sea level.
The station reports from 1893 to 1957, 65 years of record.
1,464 records set at Colby still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Colby set a daily record precipitation of 16.0 mm (0.6 in) on 31 March 1957.
About the Station
Location: Kansas, United States, 39.40 latitude, -101.05 longitude.
Elevation: 958 m (3,143 ft).
Period of record: 1893 to 1957, 65 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 Colby. 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 Colby, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
27.2 C (81.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Feb
28.3 C (82.9 F)
-35.0 C (-31.0 F)
n/a
n/a
Mar
34.4 C (93.9 F)
-28.9 C (-20.0 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-18.3 C (-0.9 F)
n/a
n/a
May
38.9 C (102.0 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
42.8 C (109.0 F)
0.6 C (33.1 F)
n/a
n/a
Jul
45.0 C (113.0 F)
3.3 C (37.9 F)
n/a
n/a
Aug
43.3 C (109.9 F)
3.9 C (39.0 F)
n/a
n/a
Sep
42.2 C (108.0 F)
-6.1 C (21.0 F)
n/a
n/a
Oct
35.6 C (96.1 F)
-13.9 C (7.0 F)
n/a
n/a
Nov
30.6 C (87.1 F)
-23.9 C (-11.0 F)
n/a
n/a
Dec
27.8 C (82.0 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 Colby still stand. 1934 holds the most, with 43.
Standing records at Colby by the year they were set
Year set
Standing records
1893
21
1894
31
1895
28
1896
20
1897
16
1898
20
1899
36
1900
15
1901
20
1902
28
1903
24
1904
18
1905
36
1906
33
1907
28
1908
12
1909
17
1910
27
1911
35
1912
18
1913
19
1914
16
1915
21
1916
27
1917
28
1918
30
1919
22
1920
28
1921
21
1922
14
1923
13
1924
23
1925
24
1926
12
1927
33
1928
16
1929
14
1930
24
1931
27
1932
30
1933
29
1934
43
1935
23
1936
41
1937
23
1938
32
1939
35
1940
21
1941
14
1942
16
1943
25
1944
16
1945
17
1946
24
1947
15
1948
18
1949
5
1950
23
1951
22
1952
16
1953
15
1954
27
1955
21
1956
15
1957
3
All-Time Record Progression
7 new records
7 all-time records were set at Colby between 13 July 1934 and 5 March 1948. Each dot is a new record.
When Colby set new all-time records
Date
Kind
Detail
1934-07-13
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
1939-12-26
Record snow depth
Record snow depth 30.5 cm (12.0 in)
1940-07-25
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
1941-07-26
Record daily precipitation
Record daily precipitation 114.3 mm (4.5 in)
1941-12-31
Record snow depth
Record snow depth 33.0 cm (13.0 in)
1942-01-01
Record snow depth
Record snow depth 43.2 cm (17.0 in)
1948-03-05
Record snow depth
Record snow depth 48.3 cm (19.0 in)
Wettest Day of Each Month
Jul: 114.3 mm (4.5 in)
The wettest day on record for each calendar month at Colby. The most was 114.3 mm (4.5 in) on 26 July 1941.
Record daily precipitation for each month at Colby
Month
Record daily precipitation (mm)
Date
Jan
29.2 mm (1.1 in)
24 January 1921
Feb
37.1 mm (1.5 in)
28 February 1918
Mar
54.4 mm (2.1 in)
11 March 1939
Apr
82.6 mm (3.3 in)
18 April 1942
May
64.3 mm (2.5 in)
30 May 1895
Jun
106.4 mm (4.2 in)
12 June 1944
Jul
114.3 mm (4.5 in)
26 July 1941
Aug
53.3 mm (2.1 in)
17 August 1930
Sep
50.8 mm (2.0 in)
10 September 1898
Oct
93.7 mm (3.7 in)
5 October 1946
Nov
61.7 mm (2.4 in)
4 November 1922
Dec
35.3 mm (1.4 in)
20 December 1918
Period of Record Coverage
1893 to 1957
Complete yearUnder 90 percent of days
65 years of record at Colby, 1893 to 1957. 2 years have data for under 90 percent of days and are left out of rankings: 1907, 1957.
Cooler than the station meanWarmer than the station mean
One stripe for each of 61 complete years at Colby, 1893 to 1956. Blue stripes are years cooler than the station's own mean of 11.3 C (52.3 F); red stripes are warmer. The coolest year was 1895, at 9.7 C (49.5 F), and the warmest was 1934, at 13.7 C (56.6 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Colby as warming stripes, 1893 to 1956
Year
Annual mean temperature
Difference from the station mean
1893
10.5 C
-0.79 C
1894
10.9 C
-0.39 C
1895
9.7 C
-1.56 C
1896
11.2 C
-0.08 C
1897
10.6 C
-0.69 C
1898
10.1 C
-1.25 C
1899
10.3 C
-0.96 C
1900
11.7 C
+0.41 C
1902
10.9 C
-0.43 C
1903
10.1 C
-1.22 C
1904
11.1 C
-0.25 C
1906
10.7 C
-0.59 C
1908
11.4 C
+0.08 C
1909
10.7 C
-0.62 C
1910
12.2 C
+0.89 C
1911
11.7 C
+0.38 C
1912
10.1 C
-1.22 C
1913
11.0 C
-0.35 C
1914
11.7 C
+0.39 C
1915
10.3 C
-0.97 C
1916
10.7 C
-0.61 C
1917
10.5 C
-0.78 C
1918
11.3 C
-0.02 C
1919
10.3 C
-1.04 C
1920
10.8 C
-0.55 C
1921
12.9 C
+1.59 C
1922
11.6 C
+0.28 C
1923
10.8 C
-0.52 C
1924
10.2 C
-1.12 C
1925
11.9 C
+0.62 C
1926
12.2 C
+0.94 C
1927
11.5 C
+0.22 C
1928
11.4 C
+0.05 C
1929
10.5 C
-0.81 C
1930
11.5 C
+0.24 C
1931
12.2 C
+0.94 C
1932
11.2 C
-0.10 C
1933
12.9 C
+1.57 C
1934
13.7 C
+2.36 C
1935
12.1 C
+0.79 C
1936
12.0 C
+0.70 C
1937
11.5 C
+0.16 C
1938
13.2 C
+1.88 C
1939
12.8 C
+1.52 C
1940
11.2 C
-0.15 C
1941
11.5 C
+0.20 C
1942
10.8 C
-0.54 C
1943
11.9 C
+0.60 C
1944
10.6 C
-0.70 C
1945
11.2 C
-0.14 C
1946
12.4 C
+1.08 C
1947
10.9 C
-0.43 C
1948
10.8 C
-0.50 C
1949
10.8 C
-0.53 C
1950
10.8 C
-0.46 C
1951
9.9 C
-1.39 C
1952
11.4 C
+0.09 C
1953
12.3 C
+0.95 C
1954
12.9 C
+1.63 C
1955
11.3 C
+0.00 C
1956
12.2 C
+0.94 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1893 to 1956. In Fahrenheit: 0.3 F (0.1 to 0.5) 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 Colby
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1893 to 1956
61
Rise
Mean daily maximum
0.04 C (-0.11 to 0.20) per decade
0.1 F (-0.2 to 0.4) per decade
1893 to 1956
61
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.6 F (0.4 to 0.8) per decade
1893 to 1956
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
1893 to 1957
Yearly extremes at Colby: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
1940
41.1 C (106.0 F)
65
Coldest night (TNn)
-35.0 C (-31.0 F)
1899
-24.4 C (-11.9 F)
65
Wettest day (Rx1day)
114.3 mm (4.5 in)
1941
41.4 mm (1.6 in)
65
Wettest five days (Rx5day)
176.0 mm (6.9 in)
1946
60.7 mm (2.4 in)
65
Longest dry spell (CDD)
76 days
1910
36 days
65
Hottest day (TXx)
The hottest day of the year at Colby, 1893 to 1957. The record is 45.0 C (113.0 F) in 1940, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Colby by year
Year
Hottest day (TXx)
1893
41.1 C (106.0 F)
1894
41.7 C (107.1 F)
1895
38.3 C (100.9 F)
1896
39.4 C (102.9 F)
1897
39.4 C (102.9 F)
1898
40.0 C (104.0 F)
1899
41.7 C (107.1 F)
1900
40.6 C (105.1 F)
1901
41.1 C (106.0 F)
1902
42.2 C (108.0 F)
1903
38.3 C (100.9 F)
1904
37.8 C (100.0 F)
1905
40.0 C (104.0 F)
1906
38.3 C (100.9 F)
1907
37.2 C (99.0 F)
1908
37.8 C (100.0 F)
1909
38.3 C (100.9 F)
1910
40.6 C (105.1 F)
1911
41.1 C (106.0 F)
1912
40.0 C (104.0 F)
1913
41.1 C (106.0 F)
1914
38.9 C (102.0 F)
1915
34.4 C (93.9 F)
1916
42.2 C (108.0 F)
1917
41.7 C (107.1 F)
1918
41.1 C (106.0 F)
1919
40.6 C (105.1 F)
1920
39.4 C (102.9 F)
1921
39.4 C (102.9 F)
1922
41.7 C (107.1 F)
1923
38.9 C (102.0 F)
1924
40.6 C (105.1 F)
1925
42.2 C (108.0 F)
1926
41.7 C (107.1 F)
1927
38.9 C (102.0 F)
1928
37.8 C (100.0 F)
1929
41.1 C (106.0 F)
1930
41.7 C (107.1 F)
1931
42.2 C (108.0 F)
1932
42.2 C (108.0 F)
1933
41.7 C (107.1 F)
1934
43.9 C (111.0 F)
1935
42.8 C (109.0 F)
1936
43.9 C (111.0 F)
1937
41.7 C (107.1 F)
1938
43.3 C (109.9 F)
1939
41.7 C (107.1 F)
1940
45.0 C (113.0 F)
1941
38.9 C (102.0 F)
1942
41.7 C (107.1 F)
1943
42.8 C (109.0 F)
1944
38.9 C (102.0 F)
1945
41.7 C (107.1 F)
1946
42.8 C (109.0 F)
1947
41.1 C (106.0 F)
1948
38.3 C (100.9 F)
1949
38.3 C (100.9 F)
1950
40.6 C (105.1 F)
1951
37.8 C (100.0 F)
1952
41.7 C (107.1 F)
1953
41.1 C (106.0 F)
1954
43.3 C (109.9 F)
1955
38.9 C (102.0 F)
1956
40.6 C (105.1 F)
1957
21.7 C (71.1 F)
Coldest night (TNn)
The coldest night of the year at Colby, 1893 to 1957. The record is -35.0 C (-31.0 F) in 1899, marked on the chart; the median year is -24.4 C (-11.9 F).
Coldest night (TNn) at Colby by year
Year
Coldest night (TNn)
1893
-23.9 C (-11.0 F)
1894
-32.2 C (-26.0 F)
1895
-28.9 C (-20.0 F)
1896
-23.9 C (-11.0 F)
1897
-25.6 C (-14.1 F)
1898
-29.4 C (-20.9 F)
1899
-35.0 C (-31.0 F)
1900
-26.1 C (-15.0 F)
1901
-27.8 C (-18.0 F)
1902
-26.1 C (-15.0 F)
1903
-23.9 C (-11.0 F)
1904
-20.6 C (-5.1 F)
1905
-28.9 C (-20.0 F)
1906
-21.1 C (-6.0 F)
1907
-20.6 C (-5.1 F)
1908
-21.7 C (-7.1 F)
1909
-23.9 C (-11.0 F)
1910
-23.3 C (-9.9 F)
1911
-30.0 C (-22.0 F)
1912
-33.3 C (-27.9 F)
1913
-22.8 C (-9.0 F)
1914
-24.4 C (-11.9 F)
1915
-24.4 C (-11.9 F)
1916
-25.6 C (-14.1 F)
1917
-25.6 C (-14.1 F)
1918
-30.0 C (-22.0 F)
1919
-28.9 C (-20.0 F)
1920
-25.0 C (-13.0 F)
1921
-21.1 C (-6.0 F)
1922
-24.4 C (-11.9 F)
1923
-22.8 C (-9.0 F)
1924
-25.6 C (-14.1 F)
1925
-23.3 C (-9.9 F)
1926
-21.1 C (-6.0 F)
1927
-25.0 C (-13.0 F)
1928
-23.9 C (-11.0 F)
1929
-25.0 C (-13.0 F)
1930
-27.2 C (-17.0 F)
1931
-18.3 C (-0.9 F)
1932
-29.4 C (-20.9 F)
1933
-30.0 C (-22.0 F)
1934
-21.7 C (-7.1 F)
1935
-26.7 C (-16.1 F)
1936
-30.6 C (-23.1 F)
1937
-24.4 C (-11.9 F)
1938
-20.6 C (-5.1 F)
1939
-22.8 C (-9.0 F)
1940
-27.2 C (-17.0 F)
1941
-21.7 C (-7.1 F)
1942
-30.0 C (-22.0 F)
1943
-27.8 C (-18.0 F)
1944
-20.0 C (-4.0 F)
1945
-20.6 C (-5.1 F)
1946
-21.7 C (-7.1 F)
1947
-22.8 C (-9.0 F)
1948
-28.9 C (-20.0 F)
1949
-22.8 C (-9.0 F)
1950
-28.9 C (-20.0 F)
1951
-29.4 C (-20.9 F)
1952
-22.2 C (-8.0 F)
1953
-19.4 C (-2.9 F)
1954
-23.9 C (-11.0 F)
1955
-18.3 C (-0.9 F)
1956
-18.9 C (-2.0 F)
1957
-24.4 C (-11.9 F)
Wettest day (Rx1day)
The wettest day of the year at Colby, 1893 to 1957. The record is 114.3 mm (4.5 in) in 1941, marked on the chart; the median year is 41.4 mm (1.6 in).
Wettest day (Rx1day) at Colby by year
Year
Wettest day (Rx1day)
1893
35.3 mm (1.4 in)
1894
29.0 mm (1.1 in)
1895
64.3 mm (2.5 in)
1896
57.9 mm (2.3 in)
1897
82.6 mm (3.3 in)
1898
50.8 mm (2.0 in)
1899
50.8 mm (2.0 in)
1900
47.2 mm (1.9 in)
1901
29.5 mm (1.2 in)
1902
57.2 mm (2.3 in)
1903
86.4 mm (3.4 in)
1904
41.9 mm (1.6 in)
1905
42.9 mm (1.7 in)
1906
36.6 mm (1.4 in)
1907
28.7 mm (1.1 in)
1908
30.2 mm (1.2 in)
1909
38.6 mm (1.5 in)
1910
14.7 mm (0.6 in)
1911
25.4 mm (1.0 in)
1912
44.7 mm (1.8 in)
1913
63.8 mm (2.5 in)
1914
91.4 mm (3.6 in)
1915
42.4 mm (1.7 in)
1916
26.2 mm (1.0 in)
1917
42.7 mm (1.7 in)
1918
40.6 mm (1.6 in)
1919
60.2 mm (2.4 in)
1920
81.3 mm (3.2 in)
1921
48.8 mm (1.9 in)
1922
61.7 mm (2.4 in)
1923
38.6 mm (1.5 in)
1924
35.6 mm (1.4 in)
1925
29.7 mm (1.2 in)
1926
25.4 mm (1.0 in)
1927
33.0 mm (1.3 in)
1928
36.1 mm (1.4 in)
1929
36.6 mm (1.4 in)
1930
90.2 mm (3.6 in)
1931
55.1 mm (2.2 in)
1932
40.6 mm (1.6 in)
1933
40.1 mm (1.6 in)
1934
23.1 mm (0.9 in)
1935
33.0 mm (1.3 in)
1936
45.2 mm (1.8 in)
1937
35.1 mm (1.4 in)
1938
41.4 mm (1.6 in)
1939
54.4 mm (2.1 in)
1940
29.5 mm (1.2 in)
1941
114.3 mm (4.5 in)
1942
82.6 mm (3.3 in)
1943
52.1 mm (2.1 in)
1944
106.4 mm (4.2 in)
1945
41.4 mm (1.6 in)
1946
93.7 mm (3.7 in)
1947
49.5 mm (1.9 in)
1948
33.0 mm (1.3 in)
1949
61.0 mm (2.4 in)
1950
41.4 mm (1.6 in)
1951
55.4 mm (2.2 in)
1952
38.4 mm (1.5 in)
1953
52.1 mm (2.1 in)
1954
34.3 mm (1.4 in)
1955
19.1 mm (0.8 in)
1956
19.3 mm (0.8 in)
1957
21.3 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Colby, 1893 to 1957. The record is 176.0 mm (6.9 in) in 1946, marked on the chart; the median year is 60.7 mm (2.4 in).
Wettest five days (Rx5day) at Colby by year
Year
Wettest five days (Rx5day)
1893
35.3 mm (1.4 in)
1894
30.0 mm (1.2 in)
1895
122.4 mm (4.8 in)
1896
110.7 mm (4.4 in)
1897
85.1 mm (3.4 in)
1898
76.2 mm (3.0 in)
1899
53.9 mm (2.1 in)
1900
54.8 mm (2.2 in)
1901
48.3 mm (1.9 in)
1902
82.3 mm (3.2 in)
1903
91.5 mm (3.6 in)
1904
75.2 mm (3.0 in)
1905
60.9 mm (2.4 in)
1906
51.6 mm (2.0 in)
1907
35.6 mm (1.4 in)
1908
50.0 mm (2.0 in)
1909
84.1 mm (3.3 in)
1910
21.1 mm (0.8 in)
1911
31.2 mm (1.2 in)
1912
73.4 mm (2.9 in)
1913
102.4 mm (4.0 in)
1914
100.1 mm (3.9 in)
1915
69.8 mm (2.7 in)
1916
46.0 mm (1.8 in)
1917
77.7 mm (3.1 in)
1918
56.1 mm (2.2 in)
1919
69.1 mm (2.7 in)
1920
81.3 mm (3.2 in)
1921
67.8 mm (2.7 in)
1922
67.1 mm (2.6 in)
1923
58.4 mm (2.3 in)
1924
35.8 mm (1.4 in)
1925
35.6 mm (1.4 in)
1926
36.3 mm (1.4 in)
1927
41.9 mm (1.6 in)
1928
58.7 mm (2.3 in)
1929
59.7 mm (2.4 in)
1930
93.7 mm (3.7 in)
1931
55.1 mm (2.2 in)
1932
63.7 mm (2.5 in)
1933
86.3 mm (3.4 in)
1934
30.1 mm (1.2 in)
1935
52.3 mm (2.1 in)
1936
60.8 mm (2.4 in)
1937
39.9 mm (1.6 in)
1938
62.0 mm (2.4 in)
1939
54.4 mm (2.1 in)
1940
48.0 mm (1.9 in)
1941
127.3 mm (5.0 in)
1942
113.8 mm (4.5 in)
1943
60.7 mm (2.4 in)
1944
111.5 mm (4.4 in)
1945
53.6 mm (2.1 in)
1946
176.0 mm (6.9 in)
1947
56.8 mm (2.2 in)
1948
41.2 mm (1.6 in)
1949
83.0 mm (3.3 in)
1950
82.8 mm (3.3 in)
1951
100.4 mm (4.0 in)
1952
81.5 mm (3.2 in)
1953
95.3 mm (3.8 in)
1954
46.4 mm (1.8 in)
1955
36.9 mm (1.5 in)
1956
32.3 mm (1.3 in)
1957
49.9 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Colby, 1893 to 1957. The record is 76 days in 1910, marked on the chart; the median year is 36 days.
Longest dry spell (CDD) at Colby by year
Year
Longest dry spell (CDD)
1893
42 days
1894
35 days
1895
37 days
1896
33 days
1897
28 days
1898
43 days
1899
64 days
1900
37 days
1901
30 days
1902
33 days
1903
31 days
1904
64 days
1905
39 days
1906
40 days
1907
31 days
1908
33 days
1909
31 days
1910
76 days
1911
53 days
1912
24 days
1913
47 days
1914
36 days
1915
24 days
1916
31 days
1917
33 days
1918
17 days
1919
31 days
1920
35 days
1921
40 days
1922
54 days
1923
36 days
1924
28 days
1925
26 days
1926
32 days
1927
31 days
1928
36 days
1929
36 days
1930
29 days
1931
51 days
1932
34 days
1933
38 days
1934
29 days
1935
43 days
1936
48 days
1937
39 days
1938
55 days
1939
42 days
1940
29 days
1941
24 days
1942
38 days
1943
25 days
1944
21 days
1945
50 days
1946
45 days
1947
26 days
1948
27 days
1949
49 days
1950
63 days
1951
36 days
1952
51 days
1953
47 days
1954
49 days
1955
57 days
1956
44 days
1957
28 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 Colby falls on 8 May and the median first autumn frost on 7 October, which leaves a median of 153 days between them.
In 1927 to 1956 the median growing season was 157 days. That is 7 days more than in 1893 to 1925.
Fitted over all years, the growing season changes by +2.9 days per decade at this station.
Frost dates and growing season at Colby
Measure
Median, all years
Earliest period (1893 to 1925)
Recent period (1927 to 1956)
Recent against earliest
Fitted trend
Last spring frost
8 May
8 May
8 May
no change
-0.3 days per decade
First autumn frost
7 October
4 October
10 October
6 days later
+2.6 days per decade
Growing days
153 days
150 days
157 days
7 days more
+2.9 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
64 years, 1893 to 1956
A day with at least 43.0 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 128.5 mm (5.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Colby: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
43.0 mm (1.7 in)
5 years
61.6 mm (2.4 in)
10 years
75.5 mm (3.0 in)
25 years
95.0 mm (3.7 in)
50 years
111.1 mm (4.4 in)
100 years
128.5 mm (5.1 in)
Longer than the 64 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, 64 years of values from 1893 to 1956.
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: 114.3 mm (4.5 in) in 1941; 106.4 mm (4.2 in) in 1944; 93.7 mm (3.7 in) in 1946.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Colby, at 1914 and 1939. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1914 ran 0.3 C (0.5 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1939 ran 0.3 C (0.6 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Colby, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1914
+0.3
+0.5
likely
5
1939
-0.3
-0.6
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Colby standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Colby 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.