Record envelope, standing records and threshold days for Waterbury City Hall (USC00068911), Connecticut, United States, with 33 years of record.
Key Facts for Waterbury City Hall
Waterbury City Hall (USC00068911) is a weather station in Connecticut, United States at 41.57 latitude and -73.03 longitude, 104 m (341 ft) above sea level.
The station reports from 1926 to 1958, 33 years of record.
1,464 records set at Waterbury City Hall still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Waterbury City Hall set a daily record precipitation of 31.8 mm (1.3 in) on 26 May 1958.
About the Station
Location: Connecticut, United States, 41.57 latitude, -73.03 longitude.
Elevation: 104 m (341 ft).
Period of record: 1926 to 1958, 33 years.
Eligible elements: prcp.
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 Waterbury City Hall. 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 Waterbury City Hall, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
22.8 C (73.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-17.2 C (1.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-7.2 C (19.0 F)
n/a
n/a
May
35.6 C (96.1 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
0.6 C (33.1 F)
n/a
n/a
Jul
40.6 C (105.1 F)
5.0 C (41.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-1.7 C (28.9 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-16.7 C (1.9 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Waterbury City Hall still stand. 1933 holds the most, with 90.
Standing records at Waterbury City Hall by the year they were set
Year set
Standing records
1926
34
1927
55
1928
66
1929
68
1930
63
1931
44
1932
58
1933
90
1934
74
1935
46
1936
68
1937
49
1938
50
1939
47
1940
62
1941
33
1942
51
1943
46
1944
8
1945
65
1946
50
1947
57
1948
24
1949
49
1950
20
1951
36
1952
40
1953
51
1954
42
1955
18
Wettest Day of Each Month
Sep: 128.0 mm (5.0 in)
The wettest day on record for each calendar month at Waterbury City Hall. The most was 128.0 mm (5.0 in) on 9 September 1934.
Record daily precipitation for each month at Waterbury City Hall
Month
Record daily precipitation (mm)
Date
Jan
67.3 mm (2.6 in)
25 January 1938
Feb
57.2 mm (2.3 in)
7 February 1929
Mar
88.4 mm (3.5 in)
12 March 1936
Apr
52.1 mm (2.1 in)
24 April 1944
May
62.2 mm (2.4 in)
27 May 1946
Jun
71.4 mm (2.8 in)
1 June 1952
Jul
84.3 mm (3.3 in)
10 July 1952
Aug
57.2 mm (2.3 in)
27 August 1937
Sep
128.0 mm (5.0 in)
9 September 1934
Oct
75.4 mm (3.0 in)
20 October 1937
Nov
97.8 mm (3.9 in)
22 November 1952
Dec
98.6 mm (3.9 in)
31 December 1948
Period of Record Coverage
1926 to 1955
Complete yearUnder 90 percent of days
30 years of record at Waterbury City Hall, 1926 to 1955. 7 years have data for under 90 percent of days and are left out of rankings: 1929, 1943, 1944, 1948, 1949, 1950, 1955.
Cooler than the station meanWarmer than the station mean
One stripe for each of 22 complete years at Waterbury City Hall, 1926 to 1954. Blue stripes are years cooler than the station's own mean of 11.0 C (51.8 F); red stripes are warmer. The coolest year was 1940, at 9.0 C (48.1 F), and the warmest was 1953, at 12.8 C (55.0 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Waterbury City Hall as warming stripes, 1926 to 1954
Year
Annual mean temperature
Difference from the station mean
1926
10.2 C
-0.83 C
1927
10.6 C
-0.40 C
1928
10.8 C
-0.22 C
1930
11.2 C
+0.25 C
1931
11.6 C
+0.58 C
1932
11.4 C
+0.38 C
1933
11.4 C
+0.37 C
1934
10.7 C
-0.28 C
1935
10.8 C
-0.19 C
1936
11.0 C
-0.04 C
1937
11.0 C
-0.01 C
1938
11.2 C
+0.19 C
1939
10.3 C
-0.69 C
1940
9.0 C
-2.03 C
1941
10.3 C
-0.66 C
1945
10.6 C
-0.40 C
1946
11.0 C
+0.00 C
1947
10.2 C
-0.82 C
1951
11.9 C
+0.87 C
1952
12.2 C
+1.18 C
1953
12.8 C
+1.81 C
1954
11.8 C
+0.84 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
1926 to 1958
Yearly extremes at Waterbury City Hall: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1926
36.4 C (97.5 F)
30
Coldest night (TNn)
-31.7 C (-25.1 F)
1943
-18.3 C (-0.9 F)
30
Wettest day (Rx1day)
128.0 mm (5.0 in)
1934
59.7 mm (2.4 in)
32
Wettest five days (Rx5day)
230.5 mm (9.1 in)
1938
95.6 mm (3.8 in)
32
Longest dry spell (CDD)
36 days
1947
18 days
32
Hottest day (TXx)
The hottest day of the year at Waterbury City Hall, 1926 to 1958. The record is 40.6 C (105.1 F) in 1926, marked on the chart; the median year is 36.4 C (97.5 F).
Hottest day (TXx) at Waterbury City Hall by year
Year
Hottest day (TXx)
1926
40.6 C (105.1 F)
1927
35.6 C (96.1 F)
1928
36.7 C (98.1 F)
1929
35.6 C (96.1 F)
1930
38.3 C (100.9 F)
1931
37.2 C (99.0 F)
1932
35.6 C (96.1 F)
1933
38.9 C (102.0 F)
1934
38.3 C (100.9 F)
1935
37.2 C (99.0 F)
1936
39.4 C (102.9 F)
1937
38.9 C (102.0 F)
1938
37.2 C (99.0 F)
1939
34.4 C (93.9 F)
1940
36.1 C (97.0 F)
1941
36.1 C (97.0 F)
1942
35.6 C (96.1 F)
1943
36.1 C (97.0 F)
1944
36.1 C (97.0 F)
1945
35.6 C (96.1 F)
1946
35.6 C (96.1 F)
1947
36.1 C (97.0 F)
1948
32.2 C (90.0 F)
1949
38.3 C (100.9 F)
1950
34.4 C (93.9 F)
1951
33.9 C (93.0 F)
1952
37.8 C (100.0 F)
1953
37.2 C (99.0 F)
1954
37.2 C (99.0 F)
1955
38.3 C (100.9 F)
1957
n/a
1958
n/a
Coldest night (TNn)
The coldest night of the year at Waterbury City Hall, 1926 to 1958. The record is -31.7 C (-25.1 F) in 1943, marked on the chart; the median year is -18.3 C (-0.9 F).
Coldest night (TNn) at Waterbury City Hall by year
Year
Coldest night (TNn)
1926
-23.3 C (-9.9 F)
1927
-16.7 C (1.9 F)
1928
-18.3 C (-0.9 F)
1929
-18.9 C (-2.0 F)
1930
-18.9 C (-2.0 F)
1931
-17.2 C (1.0 F)
1932
-18.3 C (-0.9 F)
1933
-23.9 C (-11.0 F)
1934
-26.7 C (-16.1 F)
1935
-25.6 C (-14.1 F)
1936
-23.3 C (-9.9 F)
1937
-13.9 C (7.0 F)
1938
-23.9 C (-11.0 F)
1939
-16.7 C (1.9 F)
1940
-17.2 C (1.0 F)
1941
-18.3 C (-0.9 F)
1942
-25.0 C (-13.0 F)
1943
-31.7 C (-25.1 F)
1944
-17.2 C (1.0 F)
1945
-21.1 C (-6.0 F)
1946
-18.3 C (-0.9 F)
1947
-16.7 C (1.9 F)
1948
-23.9 C (-11.0 F)
1949
-14.4 C (6.1 F)
1950
-20.0 C (-4.0 F)
1951
-15.6 C (3.9 F)
1952
-16.7 C (1.9 F)
1953
-11.1 C (12.0 F)
1954
-18.9 C (-2.0 F)
1955
-17.2 C (1.0 F)
1957
n/a
1958
n/a
Wettest day (Rx1day)
The wettest day of the year at Waterbury City Hall, 1926 to 1958. The record is 128.0 mm (5.0 in) in 1934, marked on the chart; the median year is 59.7 mm (2.4 in).
Wettest day (Rx1day) at Waterbury City Hall by year
Year
Wettest day (Rx1day)
1926
66.3 mm (2.6 in)
1927
73.9 mm (2.9 in)
1928
61.7 mm (2.4 in)
1929
57.2 mm (2.3 in)
1930
52.1 mm (2.1 in)
1931
61.0 mm (2.4 in)
1932
89.4 mm (3.5 in)
1933
56.1 mm (2.2 in)
1934
128.0 mm (5.0 in)
1935
54.9 mm (2.2 in)
1936
88.4 mm (3.5 in)
1937
75.4 mm (3.0 in)
1938
108.0 mm (4.3 in)
1939
57.2 mm (2.3 in)
1940
58.4 mm (2.3 in)
1941
44.5 mm (1.8 in)
1942
46.0 mm (1.8 in)
1943
55.9 mm (2.2 in)
1944
63.5 mm (2.5 in)
1945
48.3 mm (1.9 in)
1946
62.2 mm (2.4 in)
1947
81.3 mm (3.2 in)
1948
98.6 mm (3.9 in)
1949
54.9 mm (2.2 in)
1950
58.2 mm (2.3 in)
1951
50.3 mm (2.0 in)
1952
97.8 mm (3.9 in)
1953
74.7 mm (2.9 in)
1954
78.0 mm (3.1 in)
1955
33.3 mm (1.3 in)
1957
50.8 mm (2.0 in)
1958
50.8 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Waterbury City Hall, 1926 to 1958. The record is 230.5 mm (9.1 in) in 1938, marked on the chart; the median year is 95.6 mm (3.8 in).
Wettest five days (Rx5day) at Waterbury City Hall by year
Year
Wettest five days (Rx5day)
1926
76.5 mm (3.0 in)
1927
130.3 mm (5.1 in)
1928
96.7 mm (3.8 in)
1929
65.3 mm (2.6 in)
1930
86.1 mm (3.4 in)
1931
77.7 mm (3.1 in)
1932
125.7 mm (4.9 in)
1933
94.5 mm (3.7 in)
1934
147.9 mm (5.8 in)
1935
85.5 mm (3.4 in)
1936
119.4 mm (4.7 in)
1937
105.1 mm (4.1 in)
1938
230.5 mm (9.1 in)
1939
98.3 mm (3.9 in)
1940
76.6 mm (3.0 in)
1941
82.1 mm (3.2 in)
1942
89.2 mm (3.5 in)
1943
92.8 mm (3.7 in)
1944
162.6 mm (6.4 in)
1945
108.5 mm (4.3 in)
1946
84.6 mm (3.3 in)
1947
146.1 mm (5.8 in)
1948
199.7 mm (7.9 in)
1949
203.3 mm (8.0 in)
1950
80.8 mm (3.2 in)
1951
87.3 mm (3.4 in)
1952
133.1 mm (5.2 in)
1953
127.5 mm (5.0 in)
1954
106.9 mm (4.2 in)
1955
58.0 mm (2.3 in)
1957
86.4 mm (3.4 in)
1958
81.3 mm (3.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Waterbury City Hall, 1926 to 1958. The record is 36 days in 1947, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Waterbury City Hall by year
Year
Longest dry spell (CDD)
1926
15 days
1927
21 days
1928
18 days
1929
20 days
1930
18 days
1931
16 days
1932
13 days
1933
14 days
1934
16 days
1935
16 days
1936
19 days
1937
13 days
1938
13 days
1939
20 days
1940
15 days
1941
20 days
1942
18 days
1943
15 days
1944
18 days
1945
15 days
1946
21 days
1947
36 days
1948
27 days
1949
21 days
1950
16 days
1951
12 days
1952
20 days
1953
18 days
1954
17 days
1955
16 days
1957
25 days
1958
11 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
22 years with a frost
Across 22 years with a frost, the median last spring frost at Waterbury City Hall falls on 29 April and the median first autumn frost on 11 October, which leaves a median of 166 days between them.
Frost dates and growing season at Waterbury City Hall
Measure
Median, all years
Earliest period
Recent period (1926 to 1954)
Recent against earliest
Fitted trend
Last spring frost
29 April
n/a
29 April
n/a
n/a
First autumn frost
11 October
n/a
11 October
n/a
n/a
Growing days
166 days
n/a
166 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 Waterbury City Hall standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Waterbury City Hall 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.