Record envelope, standing records and threshold days for Westbrook (USC00069067), Connecticut, United States, with 39 years of record.
Key Facts for Westbrook
Westbrook (USC00069067) is a weather station in Connecticut, United States at 41.30 latitude and -72.43 longitude, 12 m (39 ft) above sea level.
The station reports from 1940 to 1978, 39 years of record.
1,464 records set at Westbrook still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Westbrook set a daily record high minimum temperature of 18.9 C (66.0 F) on 28 June 1978.
About the Station
Location: Connecticut, United States, 41.30 latitude, -72.43 longitude.
Elevation: 12 m (39 ft).
Period of record: 1940 to 1978, 39 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 Westbrook. 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 Westbrook, 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)
-29.4 C (-20.9 F)
n/a
n/a
Feb
18.9 C (66.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-23.3 C (-9.9 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-13.9 C (7.0 F)
n/a
n/a
May
32.8 C (91.0 F)
-5.0 C (23.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
35.0 C (95.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
0.6 C (33.1 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-10.6 C (12.9 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-13.3 C (8.1 F)
n/a
n/a
Dec
19.4 C (66.9 F)
-27.2 C (-17.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Westbrook still stand. 1949 holds the most, with 63.
Standing records at Westbrook by the year they were set
Year set
Standing records
1940
58
1941
48
1942
35
1943
59
1944
45
1945
55
1946
52
1947
41
1948
59
1949
63
1950
44
1951
46
1952
37
1953
42
1954
32
1955
32
1956
46
1957
36
1958
35
1959
41
1960
29
1961
34
1962
30
1963
28
1964
36
1965
35
1966
20
1967
39
1968
28
1969
25
1970
29
1971
21
1972
27
1973
34
1974
29
1975
41
1976
34
1977
35
1978
4
Wettest Day of Each Month
Sep: 141.7 mm (5.6 in)
The wettest day on record for each calendar month at Westbrook. The most was 141.7 mm (5.6 in) on 11 September 1954.
Record daily precipitation for each month at Westbrook
Month
Record daily precipitation (mm)
Date
Jan
61.0 mm (2.4 in)
7 January 1962
Feb
49.0 mm (1.9 in)
13 February 1966
Mar
73.2 mm (2.9 in)
13 March 1953
Apr
72.6 mm (2.9 in)
28 April 1958
May
79.0 mm (3.1 in)
31 May 1940
Jun
125.5 mm (4.9 in)
19 June 1972
Jul
91.4 mm (3.6 in)
23 July 1953
Aug
110.7 mm (4.4 in)
31 August 1954
Sep
141.7 mm (5.6 in)
11 September 1954
Oct
88.9 mm (3.5 in)
7 October 1972
Nov
104.9 mm (4.1 in)
12 November 1947
Dec
55.4 mm (2.2 in)
30 December 1942
Period of Record Coverage
1940 to 1978
Complete yearUnder 90 percent of days
39 years of record at Westbrook, 1940 to 1978. 5 years have data for under 90 percent of days and are left out of rankings: 1959, 1962, 1966, 1968, 1978.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at Westbrook, 1942 to 1977. Blue stripes are years cooler than the station's own mean of 9.6 C (49.3 F); red stripes are warmer. The coolest year was 1958, at 8.5 C (47.3 F), and the warmest was 1949, at 10.7 C (51.3 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Westbrook as warming stripes, 1942 to 1977
Year
Annual mean temperature
Difference from the station mean
1942
9.2 C
-0.37 C
1943
8.9 C
-0.75 C
1944
9.2 C
-0.38 C
1945
9.4 C
-0.25 C
1946
9.6 C
-0.01 C
1947
9.2 C
-0.41 C
1948
9.0 C
-0.58 C
1949
10.7 C
+1.11 C
1950
9.4 C
-0.26 C
1951
10.0 C
+0.39 C
1952
10.3 C
+0.66 C
1953
10.7 C
+1.10 C
1954
9.7 C
+0.09 C
1955
9.7 C
+0.09 C
1957
9.7 C
+0.11 C
1958
8.5 C
-1.10 C
1960
9.4 C
-0.21 C
1961
9.5 C
-0.09 C
1963
9.0 C
-0.62 C
1964
9.3 C
-0.27 C
1965
9.2 C
-0.45 C
1967
9.2 C
-0.38 C
1969
9.8 C
+0.21 C
1970
9.6 C
+0.00 C
1971
9.9 C
+0.27 C
1972
9.6 C
-0.04 C
1973
10.6 C
+0.98 C
1974
9.8 C
+0.18 C
1975
10.4 C
+0.74 C
1976
9.5 C
-0.11 C
1977
9.9 C
+0.33 C
The fitted trend in annual mean temperature here over 1942 to 1977 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Westbrook
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.3) per decade
0.2 F (-0.1 to 0.5) per decade
1942 to 1977
31
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.5 to 0.1) per decade
1942 to 1977
31
Not clearly different from zero
Mean daily minimum
0.3 C (0.1 to 0.5) per decade
0.6 F (0.2 to 1.0) per decade
1942 to 1977
31
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
1940 to 1978
Yearly extremes at Westbrook: 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)
1948
33.3 C (91.9 F)
39
Coldest night (TNn)
-29.4 C (-20.9 F)
1957
-21.7 C (-7.1 F)
39
Wettest day (Rx1day)
141.7 mm (5.6 in)
1954
66.8 mm (2.6 in)
39
Wettest five days (Rx5day)
184.9 mm (7.3 in)
1955
95.1 mm (3.7 in)
39
Longest dry spell (CDD)
28 days
1959
17 days
39
Hottest day (TXx)
The hottest day of the year at Westbrook, 1940 to 1978. The record is 37.8 C (100.0 F) in 1948, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Westbrook by year
Year
Hottest day (TXx)
1940
33.3 C (91.9 F)
1941
33.3 C (91.9 F)
1942
31.7 C (89.1 F)
1943
33.3 C (91.9 F)
1944
36.1 C (97.0 F)
1945
35.0 C (95.0 F)
1946
31.7 C (89.1 F)
1947
33.3 C (91.9 F)
1948
37.8 C (100.0 F)
1949
35.6 C (96.1 F)
1950
32.2 C (90.0 F)
1951
31.1 C (88.0 F)
1952
34.4 C (93.9 F)
1953
35.0 C (95.0 F)
1954
32.8 C (91.0 F)
1955
34.4 C (93.9 F)
1956
33.3 C (91.9 F)
1957
35.0 C (95.0 F)
1958
31.1 C (88.0 F)
1959
32.8 C (91.0 F)
1960
31.1 C (88.0 F)
1961
33.3 C (91.9 F)
1962
31.1 C (88.0 F)
1963
33.9 C (93.0 F)
1964
34.4 C (93.9 F)
1965
32.2 C (90.0 F)
1966
32.8 C (91.0 F)
1967
31.1 C (88.0 F)
1968
34.4 C (93.9 F)
1969
33.9 C (93.0 F)
1970
31.7 C (89.1 F)
1971
32.8 C (91.0 F)
1972
32.2 C (90.0 F)
1973
32.8 C (91.0 F)
1974
32.8 C (91.0 F)
1975
36.1 C (97.0 F)
1976
31.7 C (89.1 F)
1977
33.9 C (93.0 F)
1978
31.1 C (88.0 F)
Coldest night (TNn)
The coldest night of the year at Westbrook, 1940 to 1978. The record is -29.4 C (-20.9 F) in 1957, marked on the chart; the median year is -21.7 C (-7.1 F).
Coldest night (TNn) at Westbrook by year
Year
Coldest night (TNn)
1940
-16.1 C (3.0 F)
1941
-17.8 C (0.0 F)
1942
-26.7 C (-16.1 F)
1943
-25.6 C (-14.1 F)
1944
-24.4 C (-11.9 F)
1945
-24.4 C (-11.9 F)
1946
-20.0 C (-4.0 F)
1947
-20.0 C (-4.0 F)
1948
-28.9 C (-20.0 F)
1949
-21.1 C (-6.0 F)
1950
-23.3 C (-9.9 F)
1951
-20.0 C (-4.0 F)
1952
-20.0 C (-4.0 F)
1953
-15.0 C (5.0 F)
1954
-25.6 C (-14.1 F)
1955
-22.8 C (-9.0 F)
1956
-19.4 C (-2.9 F)
1957
-29.4 C (-20.9 F)
1958
-21.7 C (-7.1 F)
1959
-18.9 C (-2.0 F)
1960
-20.6 C (-5.1 F)
1961
-29.4 C (-20.9 F)
1962
-20.6 C (-5.1 F)
1963
-25.0 C (-13.0 F)
1964
-21.7 C (-7.1 F)
1965
-26.7 C (-16.1 F)
1966
-17.2 C (1.0 F)
1967
-26.1 C (-15.0 F)
1968
-25.6 C (-14.1 F)
1969
-17.8 C (0.0 F)
1970
-22.2 C (-8.0 F)
1971
-23.9 C (-11.0 F)
1972
-19.4 C (-2.9 F)
1973
-17.2 C (1.0 F)
1974
-21.1 C (-6.0 F)
1975
-19.4 C (-2.9 F)
1976
-22.2 C (-8.0 F)
1977
-25.0 C (-13.0 F)
1978
-15.0 C (5.0 F)
Wettest day (Rx1day)
The wettest day of the year at Westbrook, 1940 to 1978. The record is 141.7 mm (5.6 in) in 1954, marked on the chart; the median year is 66.8 mm (2.6 in).
Wettest day (Rx1day) at Westbrook by year
Year
Wettest day (Rx1day)
1940
79.0 mm (3.1 in)
1941
49.3 mm (1.9 in)
1942
55.4 mm (2.2 in)
1943
52.3 mm (2.1 in)
1944
70.4 mm (2.8 in)
1945
49.3 mm (1.9 in)
1946
66.0 mm (2.6 in)
1947
104.9 mm (4.1 in)
1948
51.6 mm (2.0 in)
1949
54.6 mm (2.1 in)
1950
50.0 mm (2.0 in)
1951
92.5 mm (3.6 in)
1952
73.4 mm (2.9 in)
1953
91.4 mm (3.6 in)
1954
141.7 mm (5.6 in)
1955
109.2 mm (4.3 in)
1956
88.9 mm (3.5 in)
1957
50.8 mm (2.0 in)
1958
72.6 mm (2.9 in)
1959
44.2 mm (1.7 in)
1960
96.5 mm (3.8 in)
1961
73.9 mm (2.9 in)
1962
65.5 mm (2.6 in)
1963
74.7 mm (2.9 in)
1964
54.1 mm (2.1 in)
1965
66.8 mm (2.6 in)
1966
49.0 mm (1.9 in)
1967
62.0 mm (2.4 in)
1968
52.3 mm (2.1 in)
1969
78.7 mm (3.1 in)
1970
64.0 mm (2.5 in)
1971
87.6 mm (3.4 in)
1972
125.5 mm (4.9 in)
1973
66.8 mm (2.6 in)
1974
60.2 mm (2.4 in)
1975
78.2 mm (3.1 in)
1976
89.4 mm (3.5 in)
1977
80.0 mm (3.1 in)
1978
53.8 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Westbrook, 1940 to 1978. The record is 184.9 mm (7.3 in) in 1955, marked on the chart; the median year is 95.1 mm (3.7 in).
Wettest five days (Rx5day) at Westbrook by year
Year
Wettest five days (Rx5day)
1940
90.0 mm (3.5 in)
1941
69.6 mm (2.7 in)
1942
95.1 mm (3.7 in)
1943
96.6 mm (3.8 in)
1944
157.0 mm (6.2 in)
1945
89.6 mm (3.5 in)
1946
73.2 mm (2.9 in)
1947
138.7 mm (5.5 in)
1948
75.5 mm (3.0 in)
1949
69.6 mm (2.7 in)
1950
71.1 mm (2.8 in)
1951
127.8 mm (5.0 in)
1952
137.6 mm (5.4 in)
1953
126.4 mm (5.0 in)
1954
156.9 mm (6.2 in)
1955
184.9 mm (7.3 in)
1956
88.9 mm (3.5 in)
1957
89.5 mm (3.5 in)
1958
101.9 mm (4.0 in)
1959
72.6 mm (2.9 in)
1960
109.2 mm (4.3 in)
1961
82.5 mm (3.2 in)
1962
88.7 mm (3.5 in)
1963
100.9 mm (4.0 in)
1964
91.9 mm (3.6 in)
1965
75.2 mm (3.0 in)
1966
73.4 mm (2.9 in)
1967
91.0 mm (3.6 in)
1968
95.8 mm (3.8 in)
1969
131.3 mm (5.2 in)
1970
105.7 mm (4.2 in)
1971
119.6 mm (4.7 in)
1972
175.8 mm (6.9 in)
1973
101.8 mm (4.0 in)
1974
79.0 mm (3.1 in)
1975
152.4 mm (6.0 in)
1976
96.5 mm (3.8 in)
1977
81.3 mm (3.2 in)
1978
75.6 mm (3.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Westbrook, 1940 to 1978. The record is 28 days in 1959, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Westbrook by year
Year
Longest dry spell (CDD)
1940
13 days
1941
19 days
1942
13 days
1943
19 days
1944
16 days
1945
16 days
1946
20 days
1947
20 days
1948
26 days
1949
19 days
1950
14 days
1951
11 days
1952
17 days
1953
20 days
1954
12 days
1955
25 days
1956
23 days
1957
16 days
1958
21 days
1959
28 days
1960
19 days
1961
17 days
1962
12 days
1963
23 days
1964
14 days
1965
14 days
1966
15 days
1967
17 days
1968
22 days
1969
13 days
1970
14 days
1971
17 days
1972
18 days
1973
15 days
1974
14 days
1975
16 days
1976
18 days
1977
17 days
1978
13 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
31 years with a frost
Across 31 years with a frost, the median last spring frost at Westbrook falls on 17 May and the median first autumn frost on 3 October, which leaves a median of 142 days between them.
Fitted over all years, the growing season changes by +8.9 days per decade at this station.
Frost dates and growing season at Westbrook
Measure
Median, all years
Earliest period
Recent period (1943 to 1977)
Recent against earliest
Fitted trend
Last spring frost
17 May
n/a
18 May
n/a
-3.3 days per decade
First autumn frost
3 October
n/a
3 October
n/a
+5.6 days per decade
Growing days
142 days
n/a
142 days
n/a
+8.9 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
37 years, 1940 to 1977
A day with at least 68.9 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 152.4 mm (6.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Westbrook: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
68.9 mm (2.7 in)
5 years
88.8 mm (3.5 in)
10 years
103.0 mm (4.1 in)
25 years
121.9 mm (4.8 in)
50 years
136.9 mm (5.4 in)
Longer than the 37 years of record
100 years
152.4 mm (6.0 in)
Longer than the 37 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, 37 years of values from 1940 to 1977.
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: 141.7 mm (5.6 in) in 1954; 125.5 mm (4.9 in) in 1972; 109.2 mm (4.3 in) in 1955.
Download the Data
Data for Westbrook standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Westbrook 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.