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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Westbrook Threshold Days by Year (USC00069067)

16 fixed thresholds counted per year at Westbrook (USC00069067): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Westbrook Thresholds

  • Westbrook: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 1942 with 49.
  • Westbrook: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1972 with 22.
  • Westbrook: days with a maximum temperature at or above 30 C (86 F) in 34 years, most in 1944 with 41.
  • Westbrook: days with a maximum temperature at or below 0 C (32 F) in 34 years, most in 1963 with 29.
  • 16 fixed thresholds have at least one qualifying day at Westbrook.
34 years with a qualifying day
Days at or above 30 C (86 F) per year at Westbrook Days per year at Westbrook with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1944. 02040601940: 81941: 251942: 81943: 241944: 411945: 161946: 121947: 131948: 171949: 271950: 61951: 61952: 211953: 231954: 61955: 231956: 91957: 161958: 51960: 81961: 211963: 151964: 121965: 81967: 21969: 161970: 161971: 111972: 81973: 191974: 111975: 101976: 71977: 18194019441948195219561961196719721976
Days per year at Westbrook with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1944.
Days at or above 30 C (86 F) per year at Westbrook
YearDaysDecade average
1940819.1
19412519.1
1942819.1
19432419.1
19444119.1
19451619.1
19461219.1
19471319.1
19481719.1
19492719.1
1950612.8
1951612.8
19522112.8
19532312.8
1954612.8
19552312.8
1956912.8
19571612.8
1958512.8
1960811.7
19612111.7
19631511.7
19641211.7
1965811.7
1967211.7
19691611.7
19701612.5
19711112.5
1972812.5
19731912.5
19741112.5
19751012.5
1976712.5
19771812.5
First to last qualifying date each year at Westbrook For each year, a bar from the first to the last day at Westbrook meeting 30 C (86 F). 1940: 13 June 1940 to 31 July 19401941: 22 May 1941 to 6 October 19411942: 30 April 1942 to 17 September 19421943: 3 June 1943 to 7 September 19431944: 28 May 1944 to 3 September 19441945: 14 June 1945 to 8 September 19451946: 8 June 1946 to 6 October 19461947: 12 June 1947 to 13 September 19471948: 25 June 1948 to 13 September 19481949: 12 June 1949 to 28 August 19491950: 8 June 1950 to 1 October 19501951: 25 June 1951 to 30 August 19511952: 25 June 1952 to 13 September 19521953: 6 June 1953 to 4 September 19531954: 20 June 1954 to 1 August 19541955: 2 July 1955 to 22 August 19551956: 13 May 1956 to 19 August 19561957: 10 May 1957 to 13 September 19571958: 1 July 1958 to 9 August 19581960: 25 April 1960 to 30 August 19601961: 13 June 1961 to 22 September 19611963: 25 June 1963 to 4 August 19631964: 23 May 1964 to 5 September 19641965: 26 May 1965 to 13 August 19651967: 16 June 1967 to 12 July 19671969: 29 May 1969 to 2 September 19691970: 18 July 1970 to 23 September 19701971: 8 June 1971 to 16 September 19711972: 12 July 1972 to 26 August 19721973: 11 June 1973 to 4 September 19731974: 17 May 1974 to 20 August 19741975: 19 June 1975 to 14 August 19751976: 17 April 1976 to 23 August 19761977: 28 May 1977 to 2 September 19771940194519501955196119691974JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Westbrook meeting 30 C (86 F).
First to last qualifying date each year at Westbrook
YearFirst dateLast date
19401940-06-131940-07-31
19411941-05-221941-10-06
19421942-04-301942-09-17
19431943-06-031943-09-07
19441944-05-281944-09-03
19451945-06-141945-09-08
19461946-06-081946-10-06
19471947-06-121947-09-13
19481948-06-251948-09-13
19491949-06-121949-08-28
19501950-06-081950-10-01
19511951-06-251951-08-30
19521952-06-251952-09-13
19531953-06-061953-09-04
19541954-06-201954-08-01
19551955-07-021955-08-22
19561956-05-131956-08-19
19571957-05-101957-09-13
19581958-07-011958-08-09
19601960-04-251960-08-30
19611961-06-131961-09-22
19631963-06-251963-08-04
19641964-05-231964-09-05
19651965-05-261965-08-13
19671967-06-161967-07-12
19691969-05-291969-09-02
19701970-07-181970-09-23
19711971-06-081971-09-16
19721972-07-121972-08-26
19731973-06-111973-09-04
19741974-05-171974-08-20
19751975-06-191975-08-14
19761976-04-171976-08-23
19771977-05-281977-09-02

Every Fixed Threshold

Fixed thresholds at Westbrook
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3441194418
35 C (95 F): Days7419481
90 F (32.2 C): Days261619557
100 F (37.8 C): Days1119481
0 C (32 F): Ice days (max3429196324
0 C (32 F): Frost days (min331641943126
-10 C (14 F): Days with min3349194839
-20 C (-4 F): Days with min261319484
20 C (68 F): Tropical nights (min3217197514
25 C (77 F): Days with min1119481
10 mm (0.39 in): Days with 10 mm or more rain3749194239
25 mm (0.98 in): Days with 25 mm or more rain3722197215
50 mm (1.97 in): Days with 50 mm or more rain33419522
100 mm (3.94 in): Days with 100 mm or more rain4219541
10 cm (3.9 in): Days with 10 cm or more snowfall33719483
25 cm (9.8 in): Days with 25 cm or more snowfall10219601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1940.

Download the Data

  • Data for Westbrook 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).