Colby Weather Records (USC00141696)

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

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

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

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.

Days with data per year at Colby
Year	Days with data	Share of year	Complete
1893	357	98%	Yes
1894	365	100%	Yes
1895	365	100%	Yes
1896	365	100%	Yes
1897	364	100%	Yes
1898	365	100%	Yes
1899	365	100%	Yes
1900	344	94%	Yes
1901	346	95%	Yes
1902	362	99%	Yes
1903	364	100%	Yes
1904	360	98%	Yes
1905	333	91%	Yes
1906	357	98%	Yes
1907	317	87%	No
1908	330	90%	Yes
1909	358	98%	Yes
1910	365	100%	Yes
1911	355	97%	Yes
1912	363	99%	Yes
1913	362	99%	Yes
1914	364	100%	Yes
1915	346	95%	Yes
1916	364	99%	Yes
1917	362	99%	Yes
1918	360	99%	Yes
1919	351	96%	Yes
1920	366	100%	Yes
1921	358	98%	Yes
1922	365	100%	Yes
1923	364	100%	Yes
1924	365	100%	Yes
1925	365	100%	Yes
1926	363	99%	Yes
1927	365	100%	Yes
1928	357	98%	Yes
1929	365	100%	Yes
1930	364	100%	Yes
1931	360	99%	Yes
1932	364	99%	Yes
1933	365	100%	Yes
1934	355	97%	Yes
1935	362	99%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	365	100%	Yes
1939	364	100%	Yes
1940	363	99%	Yes
1941	365	100%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	364	100%	Yes
1951	365	100%	Yes
1952	338	92%	Yes
1953	365	100%	Yes
1954	362	99%	Yes
1955	362	99%	Yes
1956	366	100%	Yes
1957	90	25%	No

Latest Records

Latest records at Colby
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 March 1957	Colby, US	daily rain	16.0 mm (0.6 in)	7.1 mm (0.28 in)	4 years	18 of 100 (Routine)
29 March 1957	Colby, US	daily snow depth (Tie)	5.1 cm (2.0 in)	tie	18 years	2 of 100 (Routine)
28 March 1957	Colby, US	daily snow depth	10.2 cm (4.0 in)	5.1 cm (2.0 in)	18 years	16 of 100 (Routine)
27 March 1957	Colby, US	daily snow depth	15.2 cm (6.0 in)	7.6 cm (3.0 in)	15 years	17 of 100 (Routine)
26 March 1957	Colby, US	daily snow depth	25.4 cm (10.0 in)	10.2 cm (4.0 in)	26 years	24 of 100 (Routine)
25 March 1957	Colby, US	daily snow depth	40.6 cm (16.0 in)	25.4 cm (10.0 in)	15 years	38 of 100 (Notable)
24 March 1957	Colby, US	daily snow depth	30.5 cm (12.0 in)	20.3 cm (8.0 in)	56 years	44 of 100 (Notable)
24 March 1957	Colby, US	daily snowfall	20.3 cm (8.0 in)	10.1 cm (4.0 in)	56 years	42 of 100 (Notable)
24 March 1957	Colby, US	daily rain	21.3 mm (0.8 in)	9.4 mm (0.37 in)	20 years	20 of 100 (Routine)
23 March 1957	Colby, US	daily snowfall	10.2 cm (4.0 in)	2.6 cm (1.0 in)	3 years	11 of 100 (Routine)
23 March 1957	Colby, US	daily low max (Tie)	0.0 C (32.0 F)	tie	44 years	4 of 100 (Routine)
10 March 1957	Colby, US	daily high min (Tie)	5.0 C (41.0 F)	tie	2 years	1 of 100 (Routine)
6 March 1957	Colby, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	35 years	4 of 100 (Routine)
24 February 1957	Colby, US	daily snow depth	12.7 cm (5.0 in)	7.6 cm (3.0 in)	54 years	39 of 100 (Notable)
23 February 1957	Colby, US	daily snow depth	15.2 cm (6.0 in)	12.7 cm (5.0 in)	17 years	40 of 100 (Notable)
22 February 1957	Colby, US	daily low max	-9.4 C (15.1 F)	3.8 C (6.8 F)	62 years	28 of 100 (Routine)
22 February 1957	Colby, US	daily snow depth	7.6 cm (3.0 in)	5.1 cm (2.0 in)	17 years	20 of 100 (Routine)
25 January 1957	Colby, US	daily low min	-24.4 C (-11.9 F)	3.3 C (5.9 F)	59 years	28 of 100 (Routine)
25 January 1957	Colby, US	daily low max	-13.9 C (7.0 F)	0.6 C (1.1 F)	59 years	23 of 100 (Routine)
22 January 1957	Colby, US	daily snowfall (Tie)	2.5 cm (1.0 in)	tie	54 years	5 of 100 (Routine)

Climate Trend

61 complete years, 1893 to 1956

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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).