Record envelope, standing records and threshold days for Waterbury (USC00068906), Connecticut, United States, with 62 years of record.
Key Facts for Waterbury
Waterbury (USC00068906) is a weather station in Connecticut, United States at 41.55 latitude and -73.03 longitude, 104 m (341 ft) above sea level.
The station reports from 1893 to 1954, 62 years of record.
1,464 records set at Waterbury still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Waterbury set a daily record high minimum temperature of 8.9 C (48.0 F) on 1 March 1954.
About the Station
Location: Connecticut, United States, 41.55 latitude, -73.03 longitude.
Elevation: 104 m (341 ft).
Period of record: 1893 to 1954, 62 years.
Eligible elements: tmax, tmin, 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. 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, 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)
-28.3 C (-18.9 F)
n/a
n/a
Feb
25.0 C (77.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-17.8 C (0.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-11.7 C (10.9 F)
n/a
n/a
May
35.6 C (96.1 F)
-3.3 C (26.1 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
40.0 C (104.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Waterbury still stand. 1896 holds the most, with 47.
Standing records at Waterbury by the year they were set
Year set
Standing records
1893
19
1894
28
1895
32
1896
47
1897
12
1898
18
1899
28
1900
35
1901
30
1902
19
1903
39
1904
47
1905
29
1906
20
1907
25
1908
20
1909
16
1910
14
1911
24
1912
25
1913
21
1914
32
1915
16
1916
30
1917
26
1918
21
1919
32
1920
22
1921
25
1922
17
1923
37
1924
22
1925
17
1926
9
1927
20
1928
22
1929
40
1930
33
1931
19
1932
20
1933
34
1934
27
1935
17
1936
30
1937
20
1938
23
1939
16
1940
27
1941
13
1942
24
1943
14
1944
12
1945
35
1946
19
1947
18
1948
20
1949
25
1950
21
1951
20
1952
11
1953
23
1954
7
All-Time Record Progression
2 new records
2 all-time records were set at Waterbury between 22 July 1926 and 16 February 1943. Each dot is a new record.
When Waterbury set new all-time records
Date
Kind
Detail
1926-07-22
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
1943-02-16
Record low minimum temperature
Record low minimum temperature -31.7 C (-25.1 F)
Wettest Day of Each Month
Jul: 153.2 mm (6.0 in)
The wettest day on record for each calendar month at Waterbury. The most was 153.2 mm (6.0 in) on 13 July 1897.
Record daily precipitation for each month at Waterbury
Month
Record daily precipitation (mm)
Date
Jan
70.9 mm (2.8 in)
22 January 1910
Feb
104.1 mm (4.1 in)
5 February 1920
Mar
102.1 mm (4.0 in)
2 March 1914
Apr
127.0 mm (5.0 in)
21 April 1901
May
86.1 mm (3.4 in)
21 May 1894
Jun
107.4 mm (4.2 in)
21 June 1903
Jul
153.2 mm (6.0 in)
13 July 1897
Aug
112.8 mm (4.4 in)
18 August 1901
Sep
128.0 mm (5.0 in)
9 September 1934
Oct
116.8 mm (4.6 in)
24 October 1923
Nov
89.4 mm (3.5 in)
10 November 1932
Dec
132.1 mm (5.2 in)
31 December 1948
Period of Record Coverage
1893 to 1954
Complete yearUnder 90 percent of days
62 years of record at Waterbury, 1893 to 1954. 6 years have data for under 90 percent of days and are left out of rankings: 1918, 1921, 1922, 1923, 1943, 1954.
Cooler than the station meanWarmer than the station mean
One stripe for each of 55 complete years at Waterbury, 1893 to 1953. Blue stripes are years cooler than the station's own mean of 10.4 C (50.6 F); red stripes are warmer. The coolest year was 1904, at 8.0 C (46.4 F), and the warmest was 1953, at 12.3 C (54.2 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Waterbury as warming stripes, 1893 to 1953
Year
Annual mean temperature
Difference from the station mean
1893
8.8 C
-1.53 C
1894
10.0 C
-0.41 C
1895
9.5 C
-0.91 C
1896
9.6 C
-0.77 C
1897
9.9 C
-0.46 C
1898
10.0 C
-0.41 C
1899
9.5 C
-0.91 C
1900
10.5 C
+0.15 C
1901
9.6 C
-0.75 C
1902
9.7 C
-0.63 C
1903
9.4 C
-0.96 C
1904
8.0 C
-2.34 C
1905
9.2 C
-1.21 C
1906
10.3 C
-0.09 C
1907
8.9 C
-1.44 C
1908
10.4 C
+0.06 C
1909
9.9 C
-0.42 C
1910
10.1 C
-0.23 C
1911
10.2 C
-0.13 C
1912
9.7 C
-0.69 C
1913
11.2 C
+0.80 C
1914
9.5 C
-0.87 C
1915
10.4 C
+0.00 C
1916
9.5 C
-0.87 C
1917
8.7 C
-1.62 C
1919
11.3 C
+0.98 C
1920
10.8 C
+0.44 C
1922
11.4 C
+1.05 C
1924
10.4 C
-0.01 C
1925
11.5 C
+1.16 C
1926
10.2 C
-0.20 C
1927
10.7 C
+0.29 C
1928
10.8 C
+0.41 C
1929
10.9 C
+0.51 C
1930
11.2 C
+0.87 C
1931
11.6 C
+1.19 C
1932
11.4 C
+1.02 C
1933
11.3 C
+0.97 C
1934
10.8 C
+0.44 C
1935
10.7 C
+0.36 C
1936
11.0 C
+0.61 C
1937
11.0 C
+0.63 C
1938
11.2 C
+0.83 C
1939
10.3 C
-0.07 C
1940
9.0 C
-1.41 C
1941
10.3 C
-0.03 C
1945
10.6 C
+0.21 C
1946
11.0 C
+0.64 C
1947
10.2 C
-0.19 C
1948
9.9 C
-0.48 C
1949
11.5 C
+1.16 C
1950
10.9 C
+0.52 C
1951
11.5 C
+1.18 C
1952
11.7 C
+1.36 C
1953
12.3 C
+1.96 C
The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1893 to 1953. In Fahrenheit: 0.6 F (0.4 to 0.7) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Waterbury
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.2 to 0.4) per decade
0.6 F (0.4 to 0.7) per decade
1893 to 1953
55
Rise
Mean daily maximum
0.4 C (0.3 to 0.6) per decade
0.8 F (0.6 to 1.0) per decade
1893 to 1953
55
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.6) per decade
1893 to 1953
55
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 1954
Yearly extremes at Waterbury: 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
36.1 C (97.0 F)
62
Coldest night (TNn)
-31.7 C (-25.1 F)
1943
-21.1 C (-6.0 F)
62
Wettest day (Rx1day)
153.2 mm (6.0 in)
1897
70.4 mm (2.8 in)
62
Wettest five days (Rx5day)
230.5 mm (9.1 in)
1938
100.8 mm (4.0 in)
62
Longest dry spell (CDD)
36 days
1947
17 days
62
Hottest day (TXx)
The hottest day of the year at Waterbury, 1893 to 1954. The record is 40.6 C (105.1 F) in 1926, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Waterbury by year
Year
Hottest day (TXx)
1893
34.4 C (93.9 F)
1894
34.4 C (93.9 F)
1895
34.4 C (93.9 F)
1896
33.9 C (93.0 F)
1897
32.2 C (90.0 F)
1898
37.8 C (100.0 F)
1899
35.6 C (96.1 F)
1900
38.3 C (100.9 F)
1901
38.9 C (102.0 F)
1902
33.9 C (93.0 F)
1903
35.0 C (95.0 F)
1904
35.0 C (95.0 F)
1905
36.1 C (97.0 F)
1906
35.0 C (95.0 F)
1907
35.0 C (95.0 F)
1908
36.7 C (98.1 F)
1909
35.0 C (95.0 F)
1910
35.0 C (95.0 F)
1911
39.4 C (102.9 F)
1912
37.2 C (99.0 F)
1913
36.1 C (97.0 F)
1914
36.1 C (97.0 F)
1915
35.0 C (95.0 F)
1916
35.6 C (96.1 F)
1917
38.9 C (102.0 F)
1918
34.4 C (93.9 F)
1919
37.8 C (100.0 F)
1920
37.2 C (99.0 F)
1921
35.6 C (96.1 F)
1922
35.0 C (95.0 F)
1923
37.2 C (99.0 F)
1924
36.7 C (98.1 F)
1925
38.3 C (100.9 F)
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
38.9 C (102.0 F)
1945
35.6 C (96.1 F)
1946
35.6 C (96.1 F)
1947
36.1 C (97.0 F)
1948
40.0 C (104.0 F)
1949
38.9 C (102.0 F)
1950
35.0 C (95.0 F)
1951
34.4 C (93.9 F)
1952
38.3 C (100.9 F)
1953
39.4 C (102.9 F)
1954
25.0 C (77.0 F)
Coldest night (TNn)
The coldest night of the year at Waterbury, 1893 to 1954. The record is -31.7 C (-25.1 F) in 1943, marked on the chart; the median year is -21.1 C (-6.0 F).
Coldest night (TNn) at Waterbury by year
Year
Coldest night (TNn)
1893
-23.3 C (-9.9 F)
1894
-22.2 C (-8.0 F)
1895
-23.3 C (-9.9 F)
1896
-24.4 C (-11.9 F)
1897
-17.8 C (0.0 F)
1898
-21.1 C (-6.0 F)
1899
-26.1 C (-15.0 F)
1900
-21.1 C (-6.0 F)
1901
-20.6 C (-5.1 F)
1902
-24.4 C (-11.9 F)
1903
-22.2 C (-8.0 F)
1904
-28.3 C (-18.9 F)
1905
-21.7 C (-7.1 F)
1906
-19.4 C (-2.9 F)
1907
-23.9 C (-11.0 F)
1908
-21.7 C (-7.1 F)
1909
-19.4 C (-2.9 F)
1910
-21.1 C (-6.0 F)
1911
-19.4 C (-2.9 F)
1912
-27.8 C (-18.0 F)
1913
-19.4 C (-2.9 F)
1914
-23.9 C (-11.0 F)
1915
-15.6 C (3.9 F)
1916
-25.0 C (-13.0 F)
1917
-25.0 C (-13.0 F)
1918
-27.2 C (-17.0 F)
1919
-24.4 C (-11.9 F)
1920
-23.3 C (-9.9 F)
1921
-17.8 C (0.0 F)
1922
-21.1 C (-6.0 F)
1923
-15.6 C (3.9 F)
1924
-22.2 C (-8.0 F)
1925
-20.0 C (-4.0 F)
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
-20.0 C (-4.0 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
-21.1 C (-6.0 F)
1950
-21.1 C (-6.0 F)
1951
-17.2 C (1.0 F)
1952
-18.3 C (-0.9 F)
1953
-12.8 C (9.0 F)
1954
-20.6 C (-5.1 F)
Wettest day (Rx1day)
The wettest day of the year at Waterbury, 1893 to 1954. The record is 153.2 mm (6.0 in) in 1897, marked on the chart; the median year is 70.4 mm (2.8 in).
Wettest day (Rx1day) at Waterbury by year
Year
Wettest day (Rx1day)
1893
85.3 mm (3.4 in)
1894
86.1 mm (3.4 in)
1895
84.6 mm (3.3 in)
1896
94.0 mm (3.7 in)
1897
153.2 mm (6.0 in)
1898
63.5 mm (2.5 in)
1899
57.2 mm (2.3 in)
1900
77.2 mm (3.0 in)
1901
127.0 mm (5.0 in)
1902
80.0 mm (3.1 in)
1903
107.4 mm (4.2 in)
1904
108.0 mm (4.3 in)
1905
68.8 mm (2.7 in)
1906
90.7 mm (3.6 in)
1907
116.6 mm (4.6 in)
1908
58.4 mm (2.3 in)
1909
84.6 mm (3.3 in)
1910
70.9 mm (2.8 in)
1911
79.8 mm (3.1 in)
1912
68.1 mm (2.7 in)
1913
80.5 mm (3.2 in)
1914
102.1 mm (4.0 in)
1915
85.1 mm (3.4 in)
1916
54.4 mm (2.1 in)
1917
66.3 mm (2.6 in)
1918
47.2 mm (1.9 in)
1919
53.3 mm (2.1 in)
1920
104.1 mm (4.1 in)
1921
99.1 mm (3.9 in)
1922
53.3 mm (2.1 in)
1923
116.8 mm (4.6 in)
1924
78.7 mm (3.1 in)
1925
48.3 mm (1.9 in)
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
50.8 mm (2.0 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
132.1 mm (5.2 in)
1949
48.3 mm (1.9 in)
1950
43.7 mm (1.7 in)
1951
49.5 mm (1.9 in)
1952
91.4 mm (3.6 in)
1953
69.9 mm (2.8 in)
1954
30.5 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Waterbury, 1893 to 1954. The record is 230.5 mm (9.1 in) in 1938, marked on the chart; the median year is 100.8 mm (4.0 in).
Wettest five days (Rx5day) at Waterbury by year
Year
Wettest five days (Rx5day)
1893
105.1 mm (4.1 in)
1894
134.9 mm (5.3 in)
1895
92.0 mm (3.6 in)
1896
109.0 mm (4.3 in)
1897
209.3 mm (8.2 in)
1898
77.4 mm (3.0 in)
1899
86.9 mm (3.4 in)
1900
95.0 mm (3.7 in)
1901
166.5 mm (6.6 in)
1902
93.0 mm (3.7 in)
1903
123.9 mm (4.9 in)
1904
115.6 mm (4.6 in)
1905
99.5 mm (3.9 in)
1906
93.0 mm (3.7 in)
1907
86.9 mm (3.4 in)
1908
83.1 mm (3.3 in)
1909
108.2 mm (4.3 in)
1910
104.6 mm (4.1 in)
1911
146.4 mm (5.8 in)
1912
103.7 mm (4.1 in)
1913
117.3 mm (4.6 in)
1914
102.1 mm (4.0 in)
1915
112.5 mm (4.4 in)
1916
77.0 mm (3.0 in)
1917
89.6 mm (3.5 in)
1918
52.6 mm (2.1 in)
1919
118.6 mm (4.7 in)
1920
129.5 mm (5.1 in)
1921
104.5 mm (4.1 in)
1922
72.9 mm (2.9 in)
1923
146.8 mm (5.8 in)
1924
81.0 mm (3.2 in)
1925
81.2 mm (3.2 in)
1926
76.5 mm (3.0 in)
1927
130.3 mm (5.1 in)
1928
96.7 mm (3.8 in)
1929
66.1 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
182.4 mm (7.2 in)
1949
195.1 mm (7.7 in)
1950
77.9 mm (3.1 in)
1951
90.1 mm (3.5 in)
1952
109.7 mm (4.3 in)
1953
116.4 mm (4.6 in)
1954
35.0 mm (1.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Waterbury, 1893 to 1954. The record is 36 days in 1947, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Waterbury by year
Year
Longest dry spell (CDD)
1893
15 days
1894
29 days
1895
12 days
1896
17 days
1897
15 days
1898
12 days
1899
16 days
1900
20 days
1901
25 days
1902
14 days
1903
18 days
1904
18 days
1905
15 days
1906
15 days
1907
17 days
1908
22 days
1909
13 days
1910
12 days
1911
16 days
1912
21 days
1913
16 days
1914
18 days
1915
25 days
1916
13 days
1917
21 days
1918
15 days
1919
20 days
1920
16 days
1921
14 days
1922
25 days
1923
21 days
1924
31 days
1925
12 days
1926
15 days
1927
22 days
1928
17 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
18 days
1940
16 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
25 days
1951
11 days
1952
33 days
1953
28 days
1954
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
55 years with a frost
Across 55 years with a frost, the median last spring frost at Waterbury falls on 30 April and the median first autumn frost on 11 October, which leaves a median of 165 days between them.
Fitted over all years, the growing season changes by -0.7 days per decade at this station.
Frost dates and growing season at Waterbury
Measure
Median, all years
Earliest period
Recent period (1919 to 1953)
Recent against earliest
Fitted trend
Last spring frost
30 April
n/a
29 April
n/a
+0.1 days per decade
First autumn frost
11 October
n/a
12 October
n/a
-0.6 days per decade
Growing days
165 days
n/a
167 days
n/a
-0.7 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
54 years, 1893 to 1953
A day with at least 72.4 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 163.9 mm (6.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Waterbury: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
72.4 mm (2.9 in)
5 years
95.2 mm (3.7 in)
10 years
111.0 mm (4.4 in)
25 years
131.6 mm (5.2 in)
50 years
147.6 mm (5.8 in)
100 years
163.9 mm (6.5 in)
Longer than the 54 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, 54 years of values from 1893 to 1953.
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: 153.2 mm (6.0 in) in 1897; 132.1 mm (5.2 in) in 1948; 128.0 mm (5.0 in) in 1934.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Waterbury standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Waterbury 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.