South Danbury Weather Records (USC00277967)

Record envelope, standing records and threshold days for South Danbury (USC00277967), New Hampshire, United States, with 40 years of record.

Key Facts for South Danbury

South Danbury (USC00277967) is a weather station in New Hampshire, United States at 43.50 latitude and -71.90 longitude, 284 m (932 ft) above sea level.
The station reports from 1942 to 1981, 40 years of record.
1,418 records set at South Danbury still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
South Danbury set a daily record precipitation of 21.3 mm (0.8 in) on 28 October 1981.

About the Station

Location: New Hampshire, United States, 43.50 latitude, -71.90 longitude.
Elevation: 284 m (932 ft).
Period of record: 1942 to 1981, 40 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at South Danbury. 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 South Danbury, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	3.3 C (37.9 F)	-23.3 C (-9.9 F)	n/a	n/a
Feb	11.1 C (52.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Mar	14.4 C (57.9 F)	-28.9 C (-20.0 F)	n/a	n/a
Apr	21.1 C (70.0 F)	-10.6 C (12.9 F)	n/a	n/a
May	26.7 C (80.1 F)	-4.4 C (24.1 F)	n/a	n/a
Jun	34.4 C (93.9 F)	2.2 C (36.0 F)	n/a	n/a
Jul	33.9 C (93.0 F)	3.3 C (37.9 F)	n/a	n/a
Aug	33.3 C (91.9 F)	1.1 C (34.0 F)	n/a	n/a
Sep	35.6 C (96.1 F)	-3.3 C (26.1 F)	n/a	n/a
Oct	25.6 C (78.1 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	17.8 C (64.0 F)	-15.0 C (5.0 F)	n/a	n/a
Dec	5.6 C (42.1 F)	-27.8 C (-18.0 F)	n/a	n/a

Which Years Hold Standing Records

1,418 standing records

1,418 records at South Danbury still stand. 1943 holds the most, with 1,058.

All-Time Record Progression

1 new records

1 all-time records were set at South Danbury between 12 July 1976 and 12 July 1976. Each dot is a new record.

Wettest Day of Each Month

Jul: 117.3 mm (4.6 in)

The wettest day on record for each calendar month at South Danbury. The most was 117.3 mm (4.6 in) on 12 July 1976.

Record daily precipitation for each month at South Danbury
Month	Record daily precipitation (mm)	Date
Jan	46.2 mm (1.8 in)	21 January 1964
Feb	52.1 mm (2.1 in)	25 February 1981
Mar	51.3 mm (2.0 in)	27 March 1953
Apr	66.8 mm (2.6 in)	4 April 1975
May	59.7 mm (2.4 in)	25 May 1979
Jun	71.4 mm (2.8 in)	25 June 1944
Jul	117.3 mm (4.6 in)	12 July 1976
Aug	69.9 mm (2.8 in)	14 August 1955
Sep	109.5 mm (4.3 in)	13 September 1960
Oct	96.0 mm (3.8 in)	7 October 1962
Nov	99.1 mm (3.9 in)	8 November 1963
Dec	80.3 mm (3.2 in)	27 December 1969

Period of Record Coverage

1942 to 1943

2 years of record at South Danbury, 1942 to 1943. 2 years have data for under 90 percent of days and are left out of rankings: 1942, 1943.

Latest Records

Latest records at South Danbury
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 October 1981	South Danbury, US	daily rain	21.3 mm (0.8 in)	1.5 mm (0.06 in)	38 years	16 of 100 (Routine)
27 October 1981	South Danbury, US	daily rain	18.0 mm (0.7 in)	4.0 mm (0.16 in)	23 years	12 of 100 (Routine)
19 October 1981	South Danbury, US	daily rain	35.1 mm (1.4 in)	13.3 mm (0.5 in)	6 years	14 of 100 (Routine)
23 September 1981	South Danbury, US	daily rain	28.4 mm (1.1 in)	6.3 mm (0.25 in)	24 years	15 of 100 (Routine)
9 September 1981	South Danbury, US	daily rain	26.7 mm (1.1 in)	15.5 mm (0.6 in)	12 years	18 of 100 (Routine)
16 August 1981	South Danbury, US	daily rain	33.5 mm (1.3 in)	14.7 mm (0.6 in)	34 years	26 of 100 (Routine)
6 August 1981	South Danbury, US	daily rain	33.8 mm (1.3 in)	9.7 mm (0.38 in)	26 years	18 of 100 (Routine)
21 July 1981	South Danbury, US	daily rain	31.0 mm (1.2 in)	19.6 mm (0.8 in)	36 years	31 of 100 (Routine)
23 June 1981	South Danbury, US	daily rain	17.3 mm (0.7 in)	0.5 mm (0.02 in)	4 years	5 of 100 (Routine)
17 May 1981	South Danbury, US	daily rain	26.2 mm (1.0 in)	3.8 mm (0.15 in)	3 years	8 of 100 (Routine)
13 May 1981	South Danbury, US	daily rain	28.4 mm (1.1 in)	3.8 mm (0.15 in)	7 years	10 of 100 (Routine)
28 March 1981	South Danbury, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	38 years	21 of 100 (Routine)
26 February 1981	South Danbury, US	daily rain	51.8 mm (2.0 in)	24.6 mm (1.0 in)	20 years	36 of 100 (Notable)
26 February 1981	South Danbury, US	daily snowfall (Tie)	25.4 cm (10.0 in)	tie	15 years	2 of 100 (Routine)
25 February 1981	South Danbury, US	monthly rain	52.1 mm (2.1 in)	2.1 mm (0.08 in)	11 years	19 of 100 (Routine)
21 February 1981	South Danbury, US	daily rain	35.1 mm (1.4 in)	22.9 mm (0.9 in)	4 years	29 of 100 (Routine)
12 February 1981	South Danbury, US	daily rain	35.6 mm (1.4 in)	19.9 mm (0.8 in)	26 years	32 of 100 (Routine)
9 February 1981	South Danbury, US	daily rain	45.7 mm (1.8 in)	30.2 mm (1.2 in)	36 years	46 of 100 (Notable)
21 November 1980	South Danbury, US	daily snow depth	22.9 cm (9.0 in)	2.6 cm (1.0 in)	12 years	8 of 100 (Routine)
20 November 1980	South Danbury, US	daily snow depth	25.4 cm (10.0 in)	5.1 cm (2.0 in)	12 years	11 of 100 (Routine)

Extremes by Year

1942 to 1981

Yearly extremes at South Danbury: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.6 C (96.1 F)	1942	35.0 C (95.0 F)	2
Coldest night (TNn)	-38.9 C (-38.0 F)	1943	-33.3 C (-28.0 F)	2
Wettest day (Rx1day)	117.3 mm (4.6 in)	1976	57.0 mm (2.2 in)	40
Wettest five days (Rx5day)	179.8 mm (7.1 in)	1963	83.1 mm (3.3 in)	40
Longest dry spell (CDD)	28 days	1947	18 days	40

Hottest day (TXx)

The hottest day of the year at South Danbury, 1942 to 1981. The record is 35.6 C (96.1 F) in 1942, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at South Danbury by year
Year	Hottest day (TXx)
1942	35.6 C (96.1 F)
1943	34.4 C (93.9 F)
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a

Coldest night (TNn)

The coldest night of the year at South Danbury, 1942 to 1981. The record is -38.9 C (-38.0 F) in 1943, marked on the chart; the median year is -33.3 C (-28.0 F).

Coldest night (TNn) at South Danbury by year
Year	Coldest night (TNn)
1942	-27.8 C (-18.0 F)
1943	-38.9 C (-38.0 F)
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a

Wettest day (Rx1day)

The wettest day of the year at South Danbury, 1942 to 1981. The record is 117.3 mm (4.6 in) in 1976, marked on the chart; the median year is 57.0 mm (2.2 in).

Wettest day (Rx1day) at South Danbury by year
Year	Wettest day (Rx1day)
1942	53.8 mm (2.1 in)
1943	59.4 mm (2.3 in)
1944	71.4 mm (2.8 in)
1945	69.3 mm (2.7 in)
1946	54.6 mm (2.1 in)
1947	40.9 mm (1.6 in)
1948	44.7 mm (1.8 in)
1949	33.5 mm (1.3 in)
1950	94.5 mm (3.7 in)
1951	45.7 mm (1.8 in)
1952	65.5 mm (2.6 in)
1953	68.1 mm (2.7 in)
1954	93.7 mm (3.7 in)
1955	69.9 mm (2.8 in)
1956	48.8 mm (1.9 in)
1957	39.1 mm (1.5 in)
1958	36.6 mm (1.4 in)
1959	94.0 mm (3.7 in)
1960	109.5 mm (4.3 in)
1961	47.0 mm (1.9 in)
1962	96.0 mm (3.8 in)
1963	99.1 mm (3.9 in)
1964	48.3 mm (1.9 in)
1965	36.6 mm (1.4 in)
1966	61.0 mm (2.4 in)
1967	45.2 mm (1.8 in)
1968	49.0 mm (1.9 in)
1969	80.3 mm (3.2 in)
1970	50.0 mm (2.0 in)
1971	47.5 mm (1.9 in)
1972	48.0 mm (1.9 in)
1973	68.3 mm (2.7 in)
1974	63.8 mm (2.5 in)
1975	66.8 mm (2.6 in)
1976	117.3 mm (4.6 in)
1977	48.8 mm (1.9 in)
1978	43.9 mm (1.7 in)
1979	79.8 mm (3.1 in)
1980	61.2 mm (2.4 in)
1981	52.1 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at South Danbury, 1942 to 1981. The record is 179.8 mm (7.1 in) in 1963, marked on the chart; the median year is 83.1 mm (3.3 in).

Wettest five days (Rx5day) at South Danbury by year
Year	Wettest five days (Rx5day)
1942	69.3 mm (2.7 in)
1943	79.5 mm (3.1 in)
1944	122.0 mm (4.8 in)
1945	91.4 mm (3.6 in)
1946	70.9 mm (2.8 in)
1947	105.2 mm (4.1 in)
1948	67.3 mm (2.6 in)
1949	82.3 mm (3.2 in)
1950	103.8 mm (4.1 in)
1951	83.9 mm (3.3 in)
1952	85.4 mm (3.4 in)
1953	89.9 mm (3.5 in)
1954	118.1 mm (4.6 in)
1955	161.2 mm (6.3 in)
1956	80.7 mm (3.2 in)
1957	80.8 mm (3.2 in)
1958	59.7 mm (2.4 in)
1959	146.8 mm (5.8 in)
1960	134.4 mm (5.3 in)
1961	63.5 mm (2.5 in)
1962	157.2 mm (6.2 in)
1963	179.8 mm (7.1 in)
1964	61.3 mm (2.4 in)
1965	45.8 mm (1.8 in)
1966	98.6 mm (3.9 in)
1967	63.2 mm (2.5 in)
1968	69.4 mm (2.7 in)
1969	112.1 mm (4.4 in)
1970	60.5 mm (2.4 in)
1971	69.6 mm (2.7 in)
1972	63.5 mm (2.5 in)
1973	172.1 mm (6.8 in)
1974	77.2 mm (3.0 in)
1975	132.7 mm (5.2 in)
1976	127.7 mm (5.0 in)
1977	73.7 mm (2.9 in)
1978	78.2 mm (3.1 in)
1979	107.8 mm (4.2 in)
1980	80.7 mm (3.2 in)
1981	121.4 mm (4.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at South Danbury, 1942 to 1981. The record is 28 days in 1947, marked on the chart; the median year is 18 days.

Longest dry spell (CDD) at South Danbury by year
Year	Longest dry spell (CDD)
1942	17 days
1943	15 days
1944	19 days
1945	14 days
1946	15 days
1947	28 days
1948	19 days
1949	20 days
1950	20 days
1951	12 days
1952	24 days
1953	18 days
1954	14 days
1955	19 days
1956	23 days
1957	20 days
1958	15 days
1959	20 days
1960	24 days
1961	23 days
1962	19 days
1963	28 days
1964	21 days
1965	20 days
1966	15 days
1967	12 days
1968	17 days
1969	11 days
1970	17 days
1971	18 days
1972	11 days
1973	15 days
1974	12 days
1975	14 days
1976	20 days
1977	15 days
1978	23 days
1979	15 days
1980	23 days
1981	14 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.

Rainfall Return Levels

37 years, 1944 to 1980

A day with at least 58.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 142.6 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at South Danbury: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	58.5 mm (2.3 in)
5 years	78.7 mm (3.1 in)
10 years	92.9 mm (3.7 in)
25 years	112.0 mm (4.4 in)
50 years	127.0 mm (5.0 in)	Longer than the 37 years of record
100 years	142.6 mm (5.6 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 1944 to 1980.

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: 117.3 mm (4.6 in) in 1976; 109.5 mm (4.3 in) in 1960; 99.1 mm (3.9 in) in 1963.

Download the Data

Data for South Danbury standing records by year: CSV or JSON. Field meanings are on the data page.
Data for South Danbury 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.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Year	Days with data	Share of year	Complete
1942	138	38%	No
1943	313	86%	No