Record envelope, standing records and threshold days for Norwalk Gas Plt (USC00065893), Connecticut, United States, with 32 years of record.
Key Facts for Norwalk Gas Plt
Norwalk Gas Plt (USC00065893) is a weather station in Connecticut, United States at 41.12 latitude and -73.42 longitude, 11 m (37 ft) above sea level.
The station reports from 1956 to 1987, 32 years of record.
1,464 records set at Norwalk Gas Plt still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Norwalk Gas Plt set a daily record low maximum temperature of 5.6 C (42.1 F) on 13 October 1987.
About the Station
Location: Connecticut, United States, 41.12 latitude, -73.42 longitude.
Elevation: 11 m (37 ft).
Period of record: 1956 to 1987, 32 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 Norwalk Gas Plt. 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 Norwalk Gas Plt, 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)
-26.1 C (-15.0 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-21.7 C (-7.1 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-8.3 C (17.1 F)
n/a
n/a
May
36.1 C (97.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jun
36.1 C (97.0 F)
1.1 C (34.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
7.8 C (46.0 F)
n/a
n/a
Aug
36.1 C (97.0 F)
5.0 C (41.0 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-10.0 C (14.0 F)
n/a
n/a
Dec
18.9 C (66.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Norwalk Gas Plt still stand. 1959 holds the most, with 92.
Standing records at Norwalk Gas Plt by the year they were set
Year set
Standing records
1956
45
1957
54
1958
46
1959
92
1960
47
1961
55
1962
52
1963
56
1964
53
1965
58
1966
53
1967
55
1968
47
1969
33
1970
48
1971
45
1972
46
1973
38
1974
55
1975
40
1976
66
1977
43
1978
31
1979
63
1980
41
1981
30
1982
22
1983
32
1984
36
1985
35
1986
30
1987
17
Wettest Day of Each Month
Jun: 118.1 mm (4.6 in)
The wettest day on record for each calendar month at Norwalk Gas Plt. The most was 118.1 mm (4.6 in) on 19 June 1972.
Record daily precipitation for each month at Norwalk Gas Plt
Month
Record daily precipitation (mm)
Date
Jan
111.0 mm (4.4 in)
21 January 1979
Feb
50.8 mm (2.0 in)
14 February 1966
Mar
82.6 mm (3.3 in)
24 March 1977
Apr
99.1 mm (3.9 in)
10 April 1980
May
58.4 mm (2.3 in)
25 May 1978
Jun
118.1 mm (4.6 in)
19 June 1972
Jul
77.5 mm (3.1 in)
9 July 1964
Aug
83.8 mm (3.3 in)
10 August 1976
Sep
101.6 mm (4.0 in)
13 September 1960
Oct
66.5 mm (2.6 in)
27 October 1980
Nov
68.6 mm (2.7 in)
1 November 1956
Dec
56.9 mm (2.2 in)
5 December 1968
Period of Record Coverage
1956 to 1987
Complete yearUnder 90 percent of days
32 years of record at Norwalk Gas Plt, 1956 to 1987. 7 years have data for under 90 percent of days and are left out of rankings: 1956, 1982, 1983, 1984, 1985, 1986, 1987.
Cooler than the station meanWarmer than the station mean
One stripe for each of 24 complete years at Norwalk Gas Plt, 1957 to 1981. Blue stripes are years cooler than the station's own mean of 10.1 C (50.2 F); red stripes are warmer. The coolest year was 1970, at 9.3 C (48.7 F), and the warmest was 1973, at 11.1 C (51.9 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Norwalk Gas Plt as warming stripes, 1957 to 1981
Year
Annual mean temperature
Difference from the station mean
1957
10.8 C
+0.74 C
1958
9.6 C
-0.49 C
1959
11.0 C
+0.90 C
1960
10.2 C
+0.11 C
1961
10.6 C
+0.45 C
1962
9.6 C
-0.46 C
1963
9.9 C
-0.22 C
1964
10.4 C
+0.29 C
1965
10.1 C
+0.01 C
1966
10.1 C
+0.02 C
1967
9.6 C
-0.50 C
1968
9.8 C
-0.27 C
1969
9.9 C
-0.25 C
1970
9.3 C
-0.83 C
1971
9.9 C
-0.16 C
1972
9.6 C
-0.50 C
1973
11.1 C
+0.95 C
1974
10.1 C
-0.04 C
1976
9.5 C
-0.60 C
1977
10.6 C
+0.53 C
1978
9.7 C
-0.43 C
1979
10.8 C
+0.70 C
1980
10.5 C
+0.37 C
1981
9.9 C
-0.22 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1956 to 1987
Yearly extremes at Norwalk Gas Plt: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1966
35.9 C (96.5 F)
32
Coldest night (TNn)
-26.1 C (-15.0 F)
1968
-18.6 C (-1.5 F)
32
Wettest day (Rx1day)
118.1 mm (4.6 in)
1972
62.0 mm (2.4 in)
32
Wettest five days (Rx5day)
240.8 mm (9.5 in)
1972
99.1 mm (3.9 in)
32
Longest dry spell (CDD)
28 days
1963
19 days
32
Hottest day (TXx)
The hottest day of the year at Norwalk Gas Plt, 1956 to 1987. The record is 39.4 C (102.9 F) in 1966, marked on the chart; the median year is 35.9 C (96.5 F).
Hottest day (TXx) at Norwalk Gas Plt by year
Year
Hottest day (TXx)
1956
36.1 C (97.0 F)
1957
37.8 C (100.0 F)
1958
34.4 C (93.9 F)
1959
35.6 C (96.1 F)
1960
32.2 C (90.0 F)
1961
34.4 C (93.9 F)
1962
35.6 C (96.1 F)
1963
35.6 C (96.1 F)
1964
36.7 C (98.1 F)
1965
35.0 C (95.0 F)
1966
39.4 C (102.9 F)
1967
34.4 C (93.9 F)
1968
37.2 C (99.0 F)
1969
36.1 C (97.0 F)
1970
35.0 C (95.0 F)
1971
35.0 C (95.0 F)
1972
34.4 C (93.9 F)
1973
36.1 C (97.0 F)
1974
36.7 C (98.1 F)
1975
36.1 C (97.0 F)
1976
33.3 C (91.9 F)
1977
38.9 C (102.0 F)
1978
36.7 C (98.1 F)
1979
34.4 C (93.9 F)
1980
38.3 C (100.9 F)
1981
35.0 C (95.0 F)
1982
36.7 C (98.1 F)
1983
37.2 C (99.0 F)
1984
36.1 C (97.0 F)
1985
35.0 C (95.0 F)
1986
36.1 C (97.0 F)
1987
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Norwalk Gas Plt, 1956 to 1987. The record is -26.1 C (-15.0 F) in 1968, marked on the chart; the median year is -18.6 C (-1.5 F).
Coldest night (TNn) at Norwalk Gas Plt by year
Year
Coldest night (TNn)
1956
-11.1 C (12.0 F)
1957
-21.1 C (-6.0 F)
1958
-17.8 C (0.0 F)
1959
-15.6 C (3.9 F)
1960
-15.6 C (3.9 F)
1961
-21.7 C (-7.1 F)
1962
-18.3 C (-0.9 F)
1963
-19.4 C (-2.9 F)
1964
-19.4 C (-2.9 F)
1965
-17.8 C (0.0 F)
1966
-15.0 C (5.0 F)
1967
-21.7 C (-7.1 F)
1968
-26.1 C (-15.0 F)
1969
-15.6 C (3.9 F)
1970
-20.6 C (-5.1 F)
1971
-21.1 C (-6.0 F)
1972
-17.2 C (1.0 F)
1973
-17.2 C (1.0 F)
1974
-17.2 C (1.0 F)
1975
-14.4 C (6.1 F)
1976
-20.0 C (-4.0 F)
1977
-18.9 C (-2.0 F)
1978
-15.6 C (3.9 F)
1979
-21.1 C (-6.0 F)
1980
-22.8 C (-9.0 F)
1981
-21.1 C (-6.0 F)
1982
-20.0 C (-4.0 F)
1983
-16.7 C (1.9 F)
1984
-18.9 C (-2.0 F)
1985
-20.6 C (-5.1 F)
1986
-16.1 C (3.0 F)
1987
-17.8 C (0.0 F)
Wettest day (Rx1day)
The wettest day of the year at Norwalk Gas Plt, 1956 to 1987. The record is 118.1 mm (4.6 in) in 1972, marked on the chart; the median year is 62.0 mm (2.4 in).
Wettest day (Rx1day) at Norwalk Gas Plt by year
Year
Wettest day (Rx1day)
1956
68.6 mm (2.7 in)
1957
33.0 mm (1.3 in)
1958
58.4 mm (2.3 in)
1959
43.7 mm (1.7 in)
1960
101.6 mm (4.0 in)
1961
52.8 mm (2.1 in)
1962
51.1 mm (2.0 in)
1963
43.2 mm (1.7 in)
1964
77.5 mm (3.1 in)
1965
41.7 mm (1.6 in)
1966
86.1 mm (3.4 in)
1967
52.8 mm (2.1 in)
1968
78.7 mm (3.1 in)
1969
68.6 mm (2.7 in)
1970
43.2 mm (1.7 in)
1971
74.7 mm (2.9 in)
1972
118.1 mm (4.6 in)
1973
86.4 mm (3.4 in)
1974
61.0 mm (2.4 in)
1975
43.7 mm (1.7 in)
1976
83.8 mm (3.3 in)
1977
82.6 mm (3.3 in)
1978
71.1 mm (2.8 in)
1979
111.0 mm (4.4 in)
1980
99.1 mm (3.9 in)
1981
54.1 mm (2.1 in)
1982
76.2 mm (3.0 in)
1983
60.5 mm (2.4 in)
1984
63.0 mm (2.5 in)
1985
55.9 mm (2.2 in)
1986
46.5 mm (1.8 in)
1987
57.4 mm (2.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Norwalk Gas Plt, 1956 to 1987. The record is 240.8 mm (9.5 in) in 1972, marked on the chart; the median year is 99.1 mm (3.9 in).
Wettest five days (Rx5day) at Norwalk Gas Plt by year
Year
Wettest five days (Rx5day)
1956
97.8 mm (3.9 in)
1957
103.1 mm (4.1 in)
1958
98.6 mm (3.9 in)
1959
63.7 mm (2.5 in)
1960
139.2 mm (5.5 in)
1961
64.6 mm (2.5 in)
1962
77.0 mm (3.0 in)
1963
87.9 mm (3.5 in)
1964
82.0 mm (3.2 in)
1965
62.3 mm (2.5 in)
1966
90.6 mm (3.6 in)
1967
85.3 mm (3.4 in)
1968
106.4 mm (4.2 in)
1969
99.5 mm (3.9 in)
1970
88.7 mm (3.5 in)
1971
145.1 mm (5.7 in)
1972
240.8 mm (9.5 in)
1973
116.7 mm (4.6 in)
1974
67.6 mm (2.7 in)
1975
159.5 mm (6.3 in)
1976
145.3 mm (5.7 in)
1977
102.9 mm (4.1 in)
1978
114.8 mm (4.5 in)
1979
169.2 mm (6.7 in)
1980
125.8 mm (5.0 in)
1981
108.0 mm (4.3 in)
1982
107.7 mm (4.2 in)
1983
86.6 mm (3.4 in)
1984
76.0 mm (3.0 in)
1985
55.9 mm (2.2 in)
1986
68.1 mm (2.7 in)
1987
102.4 mm (4.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Norwalk Gas Plt, 1956 to 1987. The record is 28 days in 1963, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Norwalk Gas Plt by year
Year
Longest dry spell (CDD)
1956
17 days
1957
23 days
1958
11 days
1959
24 days
1960
18 days
1961
19 days
1962
15 days
1963
28 days
1964
22 days
1965
17 days
1966
17 days
1967
16 days
1968
26 days
1969
17 days
1970
16 days
1971
17 days
1972
14 days
1973
22 days
1974
15 days
1975
22 days
1976
27 days
1977
21 days
1978
23 days
1979
15 days
1980
23 days
1981
25 days
1982
20 days
1983
24 days
1984
20 days
1985
18 days
1986
13 days
1987
10 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
24 years with a frost
Across 24 years with a frost, the median last spring frost at Norwalk Gas Plt falls on 19 April and the median first autumn frost on 16 October, which leaves a median of 180 days between them.
Frost dates and growing season at Norwalk Gas Plt
Measure
Median, all years
Earliest period
Recent period (1957 to 1981)
Recent against earliest
Fitted trend
Last spring frost
19 April
n/a
19 April
n/a
n/a
First autumn frost
16 October
n/a
16 October
n/a
n/a
Growing days
180 days
n/a
180 days
n/a
n/a
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.
Download the Data
Data for Norwalk Gas Plt standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Norwalk Gas Plt 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.