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Built 2026-10-19 (19 October 2026)

South Danbury Threshold Days by Year (USC00277967)

12 fixed thresholds counted per year at South Danbury (USC00277967): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for South Danbury Thresholds

  • South Danbury: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 1951 with 49.
  • South Danbury: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1951 with 13.
  • South Danbury: days with 10 cm (3.9 in) or more of snowfall in 30 years, most in 1971 with 13.
  • South Danbury: days with 50 mm (1.97 in) or more of precipitation in 21 years, most in 1952 with 4.
  • 12 fixed thresholds have at least one qualifying day at South Danbury.
37 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at South Danbury Days per year at South Danbury with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 1951. 02040601944: 341945: 461946: 411947: 371948: 341949: 281950: 281951: 491952: 341953: 451954: 471955: 351956: 271957: 321958: 371959: 381960: 361961: 371962: 311963: 281964: 281965: 241966: 301967: 361968: 411969: 381970: 311971: 291972: 431973: 471974: 401975: 401976: 431977: 471978: 431979: 441980: 291944194819521956196019641968197219761980
Days per year at South Danbury with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 1951.
Days with 10 mm (0.39 in) or more of precipitation per year at South Danbury
YearDaysDecade average
19443436.7
19454636.7
19464136.7
19473736.7
19483436.7
19492836.7
19502837.2
19514937.2
19523437.2
19534537.2
19544737.2
19553537.2
19562737.2
19573237.2
19583737.2
19593837.2
19603632.9
19613732.9
19623132.9
19632832.9
19642832.9
19652432.9
19663032.9
19673632.9
19684132.9
19693832.9
19703140.7
19712940.7
19724340.7
19734740.7
19744040.7
19754040.7
19764340.7
19774740.7
19784340.7
19794440.7
19802929
First to last qualifying date each year at South Danbury For each year, a bar from the first to the last day at South Danbury meeting 10 mm (0.39 in). 1944: 7 January 1944 to 28 December 19441945: 1 January 1945 to 26 December 19451946: 10 January 1946 to 28 December 19461947: 2 January 1947 to 27 December 19471948: 3 January 1948 to 31 December 19481949: 1 January 1949 to 30 November 19491950: 7 January 1950 to 30 December 19501951: 8 January 1951 to 21 December 19511952: 6 January 1952 to 24 December 19521953: 4 January 1953 to 15 December 19531954: 27 January 1954 to 30 December 19541955: 3 January 1955 to 20 November 19551956: 9 January 1956 to 15 December 19561957: 24 January 1957 to 27 December 19571958: 1 January 1958 to 6 December 19581959: 2 January 1959 to 29 December 19591960: 4 January 1960 to 17 December 19601961: 2 January 1961 to 29 December 19611962: 7 January 1962 to 30 December 19621963: 13 January 1963 to 9 December 19631964: 10 January 1964 to 25 December 19641965: 25 January 1965 to 26 December 19651966: 9 January 1966 to 30 December 19661967: 28 January 1967 to 29 December 19671968: 15 January 1968 to 29 December 19681969: 7 January 1969 to 28 December 19691970: 4 February 1970 to 24 December 19701971: 27 January 1971 to 31 December 19711972: 21 January 1972 to 22 December 19721973: 1 January 1973 to 28 December 19731974: 1 January 1974 to 17 December 19741975: 10 January 1975 to 31 December 19751976: 4 January 1976 to 8 December 19761977: 8 January 1977 to 22 December 19771978: 9 January 1978 to 26 December 19781979: 3 January 1979 to 26 December 19791980: 12 January 1980 to 3 December 198019441949195419591964196919741979JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at South Danbury meeting 10 mm (0.39 in).
First to last qualifying date each year at South Danbury
YearFirst dateLast date
19441944-01-071944-12-28
19451945-01-011945-12-26
19461946-01-101946-12-28
19471947-01-021947-12-27
19481948-01-031948-12-31
19491949-01-011949-11-30
19501950-01-071950-12-30
19511951-01-081951-12-21
19521952-01-061952-12-24
19531953-01-041953-12-15
19541954-01-271954-12-30
19551955-01-031955-11-20
19561956-01-091956-12-15
19571957-01-241957-12-27
19581958-01-011958-12-06
19591959-01-021959-12-29
19601960-01-041960-12-17
19611961-01-021961-12-29
19621962-01-071962-12-30
19631963-01-131963-12-09
19641964-01-101964-12-25
19651965-01-251965-12-26
19661966-01-091966-12-30
19671967-01-281967-12-29
19681968-01-151968-12-29
19691969-01-071969-12-28
19701970-02-041970-12-24
19711971-01-271971-12-31
19721972-01-211972-12-22
19731973-01-011973-12-28
19741974-01-011974-12-17
19751975-01-101975-12-31
19761976-01-041976-12-08
19771977-01-081977-12-22
19781978-01-091978-12-26
19791979-01-031979-12-26
19801980-01-121980-12-03

Every Fixed Threshold

Fixed thresholds at South Danbury
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
0 C (32 F): Frost days (min10n/a156
-10 C (14 F): Days with min10n/a61
-20 C (-4 F): Days with min10n/a13
-30 C (-22 F): Days with min10n/a2
20 C (68 F): Tropical nights (min10n/a5
10 mm (0.39 in): Days with 10 mm or more rain3749195129
25 mm (0.98 in): Days with 25 mm or more rain371319519
50 mm (1.97 in): Days with 50 mm or more rain21419523
100 mm (3.94 in): Days with 100 mm or more rain2119601
10 cm (3.9 in): Days with 10 cm or more snowfall301319716
25 cm (9.8 in): Days with 25 cm or more snowfall17319521
50 cm (19.7 in): Days with 50 cm or more snowfall1119691

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

Download the Data

  • 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

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