Record envelope, standing records and threshold days for Colchester 2 W (USC00061499), Connecticut, United States, with 81 years of record.
Key Facts for Colchester 2 W
Colchester 2 W (USC00061499) is a weather station in Connecticut, United States at 41.55 latitude and -72.37 longitude, 146 m (479 ft) above sea level.
The station reports from 1893 to 1973, 81 years of record.
1,464 records set at Colchester 2 W still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Colchester 2 W tied a daily record high maximum temperature of 15.6 C (60.1 F) on 27 December 1973.
About the Station
Location: Connecticut, United States, 41.55 latitude, -72.37 longitude.
Elevation: 146 m (479 ft).
Period of record: 1893 to 1973, 81 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Colchester 2 W. 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 Colchester 2 W, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.0 C (68.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-30.6 C (-23.1 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-24.4 C (-11.9 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-13.3 C (8.1 F)
n/a
n/a
May
33.3 C (91.9 F)
-5.0 C (23.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
0.0 C (32.0 F)
n/a
n/a
Jul
37.8 C (100.0 F)
4.4 C (39.9 F)
n/a
n/a
Aug
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-10.0 C (14.0 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-14.4 C (6.1 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Colchester 2 W still stand. 1896 holds the most, with 41.
Standing records at Colchester 2 W by the year they were set
Year set
Standing records
1893
11
1894
29
1895
22
1896
41
1897
11
1898
18
1899
15
1900
25
1901
14
1902
14
1903
34
1904
16
1905
13
1906
18
1907
15
1908
20
1909
17
1910
14
1911
23
1912
25
1913
17
1914
22
1915
14
1916
25
1917
28
1918
25
1919
29
1920
15
1921
17
1922
9
1923
17
1924
8
1925
26
1926
18
1927
21
1928
15
1929
26
1930
29
1931
15
1932
26
1933
22
1934
23
1935
9
1936
17
1937
15
1938
5
1939
16
1940
23
1942
19
1943
25
1944
18
1945
35
1946
16
1947
23
1948
10
1950
19
1951
21
1952
19
1953
20
1954
23
1955
12
1956
11
1957
25
1958
9
1959
14
1960
13
1961
19
1962
13
1963
18
1964
27
1965
24
1966
16
1967
24
1968
18
1969
8
1970
6
1971
10
1972
11
1973
11
All-Time Record Progression
2 new records
2 all-time records were set at Colchester 2 W between 9 February 1934 and 16 February 1943. Each dot is a new record.
When Colchester 2 W set new all-time records
Date
Kind
Detail
1934-02-09
Record low minimum temperature
Record low minimum temperature -29.4 C (-20.9 F)
1943-02-16
Record low minimum temperature
Record low minimum temperature -30.6 C (-23.1 F)
Wettest Day of Each Month
Oct: 132.1 mm (5.2 in)
The wettest day on record for each calendar month at Colchester 2 W. The most was 132.1 mm (5.2 in) on 24 October 1923.
Record daily precipitation for each month at Colchester 2 W
Month
Record daily precipitation (mm)
Date
Jan
74.9 mm (2.9 in)
6 January 1929
Feb
101.6 mm (4.0 in)
28 February 1896
Mar
73.7 mm (2.9 in)
28 March 1932
Apr
96.3 mm (3.8 in)
22 April 1901
May
98.8 mm (3.9 in)
31 May 1940
Jun
78.0 mm (3.1 in)
21 June 1903
Jul
91.4 mm (3.6 in)
22 July 1897
Aug
112.8 mm (4.4 in)
24 August 1901
Sep
122.4 mm (4.8 in)
12 September 1960
Oct
132.1 mm (5.2 in)
24 October 1923
Nov
106.9 mm (4.2 in)
4 November 1927
Dec
87.4 mm (3.4 in)
15 December 1901
Period of Record Coverage
1893 to 1973
Complete yearUnder 90 percent of days
80 years of record at Colchester 2 W, 1893 to 1973. 12 years have data for under 90 percent of days and are left out of rankings: 1902, 1904, 1931, 1938, 1941, 1948, 1950, 1955 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 64 complete years at Colchester 2 W, 1893 to 1972. Blue stripes are years cooler than the station's own mean of 9.2 C (48.6 F); red stripes are warmer. The coolest year was 1917, at 7.7 C (45.8 F), and the warmest was 1921, at 10.7 C (51.3 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Colchester 2 W as warming stripes, 1893 to 1972
Year
Annual mean temperature
Difference from the station mean
1893
8.4 C
-0.82 C
1894
9.6 C
+0.33 C
1895
9.1 C
-0.14 C
1896
9.0 C
-0.21 C
1897
9.3 C
+0.10 C
1898
9.8 C
+0.61 C
1899
9.5 C
+0.27 C
1900
10.3 C
+1.03 C
1901
9.1 C
-0.12 C
1903
9.1 C
-0.09 C
1905
8.6 C
-0.58 C
1906
9.3 C
+0.06 C
1907
8.1 C
-1.08 C
1908
9.4 C
+0.19 C
1909
8.8 C
-0.38 C
1910
8.8 C
-0.38 C
1911
9.0 C
-0.27 C
1912
8.3 C
-0.88 C
1913
10.1 C
+0.86 C
1914
8.8 C
-0.42 C
1915
9.7 C
+0.47 C
1916
8.7 C
-0.50 C
1917
7.7 C
-1.54 C
1919
9.7 C
+0.44 C
1920
8.8 C
-0.40 C
1921
10.7 C
+1.48 C
1922
9.8 C
+0.62 C
1923
9.2 C
-0.06 C
1924
8.9 C
-0.32 C
1925
9.9 C
+0.69 C
1926
8.7 C
-0.55 C
1927
10.0 C
+0.76 C
1928
9.9 C
+0.72 C
1929
9.8 C
+0.61 C
1930
10.4 C
+1.14 C
1932
9.6 C
+0.40 C
1933
9.2 C
-0.02 C
1934
8.7 C
-0.56 C
1935
8.9 C
-0.28 C
1936
9.5 C
+0.23 C
1937
10.0 C
+0.75 C
1939
9.0 C
-0.20 C
1942
9.6 C
+0.42 C
1943
9.2 C
-0.01 C
1944
9.7 C
+0.45 C
1945
9.7 C
+0.52 C
1946
9.9 C
+0.69 C
1947
9.4 C
+0.14 C
1951
9.8 C
+0.57 C
1952
9.9 C
+0.68 C
1957
9.8 C
+0.60 C
1958
8.4 C
-0.85 C
1959
9.6 C
+0.41 C
1960
8.8 C
-0.47 C
1961
9.0 C
-0.19 C
1962
8.2 C
-1.01 C
1963
8.6 C
-0.63 C
1964
8.8 C
-0.38 C
1965
8.6 C
-0.61 C
1966
8.7 C
-0.56 C
1967
8.3 C
-0.95 C
1968
8.5 C
-0.77 C
1971
9.6 C
+0.33 C
1972
9.1 C
-0.13 C
The fitted trend in annual mean temperature here over 1893 to 1972 is -0.02 C (-0.09 to 0.04) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.04 F (-0.16 to 0.08) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Colchester 2 W
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.02 C (-0.09 to 0.04) per decade
-0.04 F (-0.16 to 0.08) per decade
1893 to 1972
64
Not clearly different from zero
Mean daily maximum
0.07 C (0.00 to 0.15) per decade
0.13 F (-0.01 to 0.26) per decade
1893 to 1972
64
Not clearly different from zero
Mean daily minimum
-0.12 C (-0.20 to -0.04) per decade
-0.2 F (-0.4 to -0.1) per decade
1893 to 1972
64
Fall
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 1973
Yearly extremes at Colchester 2 W: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1919
33.9 C (93.0 F)
80
Coldest night (TNn)
-30.6 C (-23.1 F)
1943
-21.4 C (-6.5 F)
80
Wettest day (Rx1day)
132.1 mm (5.2 in)
1923
69.2 mm (2.7 in)
80
Wettest five days (Rx5day)
252.9 mm (10.0 in)
1938
96.7 mm (3.8 in)
80
Longest dry spell (CDD)
34 days
1924
17 days
80
Hottest day (TXx)
The hottest day of the year at Colchester 2 W, 1893 to 1973. The record is 37.8 C (100.0 F) in 1919, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Colchester 2 W by year
Year
Hottest day (TXx)
1893
35.0 C (95.0 F)
1894
33.9 C (93.0 F)
1895
34.4 C (93.9 F)
1896
33.9 C (93.0 F)
1897
32.2 C (90.0 F)
1898
36.7 C (98.1 F)
1899
33.9 C (93.0 F)
1900
35.6 C (96.1 F)
1901
35.6 C (96.1 F)
1902
31.1 C (88.0 F)
1903
33.3 C (91.9 F)
1904
32.8 C (91.0 F)
1905
33.9 C (93.0 F)
1906
32.2 C (90.0 F)
1907
32.2 C (90.0 F)
1908
33.9 C (93.0 F)
1909
33.9 C (93.0 F)
1910
34.4 C (93.9 F)
1911
37.2 C (99.0 F)
1912
35.6 C (96.1 F)
1913
34.4 C (93.9 F)
1914
33.3 C (91.9 F)
1915
32.8 C (91.0 F)
1916
33.9 C (93.0 F)
1917
36.7 C (98.1 F)
1918
35.6 C (96.1 F)
1919
37.8 C (100.0 F)
1920
31.7 C (89.1 F)
1921
35.0 C (95.0 F)
1922
32.2 C (90.0 F)
1923
35.0 C (95.0 F)
1924
33.9 C (93.0 F)
1925
36.1 C (97.0 F)
1926
37.2 C (99.0 F)
1927
32.8 C (91.0 F)
1928
34.4 C (93.9 F)
1929
33.9 C (93.0 F)
1930
35.0 C (95.0 F)
1931
35.0 C (95.0 F)
1932
32.2 C (90.0 F)
1933
34.4 C (93.9 F)
1934
35.6 C (96.1 F)
1935
33.3 C (91.9 F)
1936
36.1 C (97.0 F)
1937
35.0 C (95.0 F)
1938
30.6 C (87.1 F)
1939
33.3 C (91.9 F)
1940
32.8 C (91.0 F)
1941
7.2 C (45.0 F)
1942
33.3 C (91.9 F)
1943
35.0 C (95.0 F)
1944
37.8 C (100.0 F)
1945
34.4 C (93.9 F)
1946
32.8 C (91.0 F)
1947
36.7 C (98.1 F)
1948
23.9 C (75.0 F)
1950
32.2 C (90.0 F)
1951
33.3 C (91.9 F)
1952
36.7 C (98.1 F)
1953
37.2 C (99.0 F)
1954
33.9 C (93.0 F)
1955
35.6 C (96.1 F)
1956
31.7 C (89.1 F)
1957
36.1 C (97.0 F)
1958
31.7 C (89.1 F)
1959
33.9 C (93.0 F)
1960
31.1 C (88.0 F)
1961
32.8 C (91.0 F)
1962
31.7 C (89.1 F)
1963
34.4 C (93.9 F)
1964
35.0 C (95.0 F)
1965
32.8 C (91.0 F)
1966
36.7 C (98.1 F)
1967
34.4 C (93.9 F)
1968
34.4 C (93.9 F)
1969
33.9 C (93.0 F)
1970
32.2 C (90.0 F)
1971
31.7 C (89.1 F)
1972
31.7 C (89.1 F)
1973
33.3 C (91.9 F)
Coldest night (TNn)
The coldest night of the year at Colchester 2 W, 1893 to 1973. The record is -30.6 C (-23.1 F) in 1943, marked on the chart; the median year is -21.4 C (-6.5 F).
Coldest night (TNn) at Colchester 2 W by year
Year
Coldest night (TNn)
1893
-20.6 C (-5.1 F)
1894
-25.6 C (-14.1 F)
1895
-21.1 C (-6.0 F)
1896
-23.3 C (-9.9 F)
1897
-16.7 C (1.9 F)
1898
-19.4 C (-2.9 F)
1899
-22.2 C (-8.0 F)
1900
-20.0 C (-4.0 F)
1901
-21.7 C (-7.1 F)
1902
-23.3 C (-9.9 F)
1903
-20.0 C (-4.0 F)
1904
-26.7 C (-16.1 F)
1905
-19.4 C (-2.9 F)
1906
-18.9 C (-2.0 F)
1907
-25.0 C (-13.0 F)
1908
-21.7 C (-7.1 F)
1909
-20.6 C (-5.1 F)
1910
-23.3 C (-9.9 F)
1911
-18.9 C (-2.0 F)
1912
-27.8 C (-18.0 F)
1913
-18.9 C (-2.0 F)
1914
-25.0 C (-13.0 F)
1915
-16.1 C (3.0 F)
1916
-23.3 C (-9.9 F)
1917
-25.6 C (-14.1 F)
1918
-25.0 C (-13.0 F)
1919
-24.4 C (-11.9 F)
1920
-25.6 C (-14.1 F)
1921
-19.4 C (-2.9 F)
1922
-23.3 C (-9.9 F)
1923
-20.0 C (-4.0 F)
1924
-20.6 C (-5.1 F)
1925
-23.3 C (-9.9 F)
1926
-19.4 C (-2.9 F)
1927
-21.7 C (-7.1 F)
1928
-18.3 C (-0.9 F)
1929
-18.9 C (-2.0 F)
1930
-21.7 C (-7.1 F)
1931
-17.8 C (0.0 F)
1932
-20.0 C (-4.0 F)
1933
-26.7 C (-16.1 F)
1934
-29.4 C (-20.9 F)
1935
-23.9 C (-11.0 F)
1936
-21.7 C (-7.1 F)
1937
-15.6 C (3.9 F)
1938
-23.9 C (-11.0 F)
1939
-17.2 C (1.0 F)
1940
-19.4 C (-2.9 F)
1941
-18.9 C (-2.0 F)
1942
-24.4 C (-11.9 F)
1943
-30.6 C (-23.1 F)
1944
-19.4 C (-2.9 F)
1945
-22.2 C (-8.0 F)
1946
-19.4 C (-2.9 F)
1947
-18.3 C (-0.9 F)
1948
-26.1 C (-15.0 F)
1950
-22.8 C (-9.0 F)
1951
-20.6 C (-5.1 F)
1952
-21.1 C (-6.0 F)
1953
-17.2 C (1.0 F)
1954
-24.4 C (-11.9 F)
1955
-21.1 C (-6.0 F)
1956
-12.8 C (9.0 F)
1957
-26.1 C (-15.0 F)
1958
-22.8 C (-9.0 F)
1959
-19.4 C (-2.9 F)
1960
-18.9 C (-2.0 F)
1961
-25.0 C (-13.0 F)
1962
-23.3 C (-9.9 F)
1963
-22.2 C (-8.0 F)
1964
-19.4 C (-2.9 F)
1965
-23.3 C (-9.9 F)
1966
-18.9 C (-2.0 F)
1967
-26.1 C (-15.0 F)
1968
-24.4 C (-11.9 F)
1969
-18.3 C (-0.9 F)
1970
-16.7 C (1.9 F)
1971
-23.3 C (-9.9 F)
1972
-20.0 C (-4.0 F)
1973
-17.8 C (0.0 F)
Wettest day (Rx1day)
The wettest day of the year at Colchester 2 W, 1893 to 1973. The record is 132.1 mm (5.2 in) in 1923, marked on the chart; the median year is 69.2 mm (2.7 in).
Wettest day (Rx1day) at Colchester 2 W by year
Year
Wettest day (Rx1day)
1893
91.4 mm (3.6 in)
1894
54.6 mm (2.1 in)
1895
107.2 mm (4.2 in)
1896
101.6 mm (4.0 in)
1897
91.4 mm (3.6 in)
1898
83.3 mm (3.3 in)
1899
48.3 mm (1.9 in)
1900
91.4 mm (3.6 in)
1901
112.8 mm (4.4 in)
1902
70.6 mm (2.8 in)
1903
78.0 mm (3.1 in)
1904
83.3 mm (3.3 in)
1905
58.9 mm (2.3 in)
1906
96.3 mm (3.8 in)
1907
77.0 mm (3.0 in)
1908
73.4 mm (2.9 in)
1909
67.3 mm (2.6 in)
1910
54.6 mm (2.1 in)
1911
47.8 mm (1.9 in)
1912
67.6 mm (2.7 in)
1913
56.4 mm (2.2 in)
1914
51.8 mm (2.0 in)
1915
71.1 mm (2.8 in)
1916
54.6 mm (2.1 in)
1917
53.1 mm (2.1 in)
1918
59.9 mm (2.4 in)
1919
69.6 mm (2.7 in)
1920
102.4 mm (4.0 in)
1921
71.6 mm (2.8 in)
1922
72.4 mm (2.9 in)
1923
132.1 mm (5.2 in)
1924
75.4 mm (3.0 in)
1925
46.2 mm (1.8 in)
1926
64.8 mm (2.6 in)
1927
106.9 mm (4.2 in)
1928
72.4 mm (2.9 in)
1929
74.9 mm (2.9 in)
1930
44.7 mm (1.8 in)
1931
86.6 mm (3.4 in)
1932
75.4 mm (3.0 in)
1933
36.3 mm (1.4 in)
1934
82.6 mm (3.3 in)
1935
50.3 mm (2.0 in)
1936
96.0 mm (3.8 in)
1937
78.2 mm (3.1 in)
1938
90.9 mm (3.6 in)
1939
81.8 mm (3.2 in)
1940
98.8 mm (3.9 in)
1941
38.1 mm (1.5 in)
1942
51.8 mm (2.0 in)
1943
66.8 mm (2.6 in)
1944
99.1 mm (3.9 in)
1945
49.5 mm (1.9 in)
1946
53.3 mm (2.1 in)
1947
62.0 mm (2.4 in)
1948
48.8 mm (1.9 in)
1950
55.6 mm (2.2 in)
1951
58.9 mm (2.3 in)
1952
59.4 mm (2.3 in)
1953
63.2 mm (2.5 in)
1954
101.6 mm (4.0 in)
1955
104.6 mm (4.1 in)
1956
44.5 mm (1.8 in)
1957
42.7 mm (1.7 in)
1958
68.8 mm (2.7 in)
1959
90.2 mm (3.6 in)
1960
122.4 mm (4.8 in)
1961
70.6 mm (2.8 in)
1962
53.6 mm (2.1 in)
1963
74.2 mm (2.9 in)
1964
59.2 mm (2.3 in)
1965
46.5 mm (1.8 in)
1966
60.5 mm (2.4 in)
1967
64.5 mm (2.5 in)
1968
53.3 mm (2.1 in)
1969
53.3 mm (2.1 in)
1970
40.4 mm (1.6 in)
1971
108.0 mm (4.3 in)
1972
82.6 mm (3.3 in)
1973
68.6 mm (2.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Colchester 2 W, 1893 to 1973. The record is 252.9 mm (10.0 in) in 1938, marked on the chart; the median year is 96.7 mm (3.8 in).
Wettest five days (Rx5day) at Colchester 2 W by year
Year
Wettest five days (Rx5day)
1893
119.3 mm (4.7 in)
1894
74.2 mm (2.9 in)
1895
117.9 mm (4.6 in)
1896
116.8 mm (4.6 in)
1897
127.3 mm (5.0 in)
1898
94.0 mm (3.7 in)
1899
74.7 mm (2.9 in)
1900
112.2 mm (4.4 in)
1901
122.0 mm (4.8 in)
1902
90.2 mm (3.6 in)
1903
94.2 mm (3.7 in)
1904
92.2 mm (3.6 in)
1905
99.6 mm (3.9 in)
1906
119.4 mm (4.7 in)
1907
127.3 mm (5.0 in)
1908
108.9 mm (4.3 in)
1909
93.2 mm (3.7 in)
1910
75.8 mm (3.0 in)
1911
117.3 mm (4.6 in)
1912
103.4 mm (4.1 in)
1913
109.2 mm (4.3 in)
1914
73.4 mm (2.9 in)
1915
125.0 mm (4.9 in)
1916
78.8 mm (3.1 in)
1917
67.5 mm (2.7 in)
1918
90.2 mm (3.6 in)
1919
127.8 mm (5.0 in)
1920
102.4 mm (4.0 in)
1921
98.0 mm (3.9 in)
1922
99.3 mm (3.9 in)
1923
162.6 mm (6.4 in)
1924
81.2 mm (3.2 in)
1925
78.5 mm (3.1 in)
1926
80.2 mm (3.2 in)
1927
110.0 mm (4.3 in)
1928
85.4 mm (3.4 in)
1929
94.0 mm (3.7 in)
1930
68.1 mm (2.7 in)
1931
105.2 mm (4.1 in)
1932
105.2 mm (4.1 in)
1933
94.3 mm (3.7 in)
1934
91.4 mm (3.6 in)
1935
93.4 mm (3.7 in)
1936
97.8 mm (3.9 in)
1937
135.4 mm (5.3 in)
1938
252.9 mm (10.0 in)
1939
81.8 mm (3.2 in)
1940
105.9 mm (4.2 in)
1941
38.1 mm (1.5 in)
1942
82.6 mm (3.3 in)
1943
84.6 mm (3.3 in)
1944
176.3 mm (6.9 in)
1945
75.7 mm (3.0 in)
1946
54.1 mm (2.1 in)
1947
103.1 mm (4.1 in)
1948
56.2 mm (2.2 in)
1950
109.9 mm (4.3 in)
1951
154.2 mm (6.1 in)
1952
92.7 mm (3.6 in)
1953
95.5 mm (3.8 in)
1954
144.8 mm (5.7 in)
1955
230.3 mm (9.1 in)
1956
57.2 mm (2.3 in)
1957
88.6 mm (3.5 in)
1958
101.8 mm (4.0 in)
1959
107.2 mm (4.2 in)
1960
134.9 mm (5.3 in)
1961
83.3 mm (3.3 in)
1962
72.4 mm (2.9 in)
1963
104.4 mm (4.1 in)
1964
85.4 mm (3.4 in)
1965
55.4 mm (2.2 in)
1966
77.4 mm (3.0 in)
1967
83.5 mm (3.3 in)
1968
87.6 mm (3.4 in)
1969
99.2 mm (3.9 in)
1970
57.4 mm (2.3 in)
1971
121.7 mm (4.8 in)
1972
148.8 mm (5.9 in)
1973
137.7 mm (5.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Colchester 2 W, 1893 to 1973. The record is 34 days in 1924, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Colchester 2 W by year
Year
Longest dry spell (CDD)
1893
11 days
1894
22 days
1895
21 days
1896
14 days
1897
12 days
1898
16 days
1899
20 days
1900
13 days
1901
25 days
1902
16 days
1903
18 days
1904
9 days
1905
21 days
1906
12 days
1907
12 days
1908
22 days
1909
13 days
1910
22 days
1911
21 days
1912
20 days
1913
16 days
1914
25 days
1915
25 days
1916
13 days
1917
21 days
1918
19 days
1919
14 days
1920
15 days
1921
24 days
1922
25 days
1923
21 days
1924
34 days
1925
16 days
1926
14 days
1927
14 days
1928
11 days
1929
18 days
1930
18 days
1931
13 days
1932
12 days
1933
9 days
1934
17 days
1935
17 days
1936
10 days
1937
11 days
1938
15 days
1939
25 days
1940
19 days
1941
12 days
1942
18 days
1943
19 days
1944
16 days
1945
16 days
1946
18 days
1947
23 days
1948
9 days
1950
16 days
1951
12 days
1952
18 days
1953
18 days
1954
14 days
1955
24 days
1956
15 days
1957
15 days
1958
16 days
1959
13 days
1960
19 days
1961
22 days
1962
18 days
1963
27 days
1964
14 days
1965
17 days
1966
27 days
1967
17 days
1968
21 days
1969
16 days
1970
12 days
1971
17 days
1972
12 days
1973
15 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
64 years with a frost
Across 64 years with a frost, the median last spring frost at Colchester 2 W falls on 5 May and the median first autumn frost on 4 October, which leaves a median of 153 days between them.
In 1930 to 1972 the median growing season was 138 days. That is 22 days fewer than in 1893 to 1925.
Fitted over all years, the growing season changes by -5.5 days per decade at this station.
Frost dates and growing season at Colchester 2 W
Measure
Median, all years
Earliest period (1893 to 1925)
Recent period (1930 to 1972)
Recent against earliest
Fitted trend
Last spring frost
5 May
2 May
14 May
12 days later
+2.6 days per decade
First autumn frost
4 October
9 October
28 September
11 days earlier
-2.9 days per decade
Growing days
153 days
160 days
138 days
22 days fewer
-5.5 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
69 years, 1893 to 1972
A day with at least 68.6 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 139.8 mm (5.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Colchester 2 W: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
68.6 mm (2.7 in)
5 years
87.7 mm (3.5 in)
10 years
100.3 mm (3.9 in)
25 years
116.3 mm (4.6 in)
50 years
128.1 mm (5.0 in)
100 years
139.8 mm (5.5 in)
Longer than the 69 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, 69 years of values from 1893 to 1972.
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: 132.1 mm (5.2 in) in 1923; 122.4 mm (4.8 in) in 1960; 112.8 mm (4.4 in) in 1901.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Colchester 2 W, at 1914 and 1932. 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 1932 ran 0.4 C (0.8 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Colchester 2 W, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1914
+0.3
+0.5
likely
5
1932
-0.4
-0.8
possible
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 Colchester 2 W standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Colchester 2 W 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.