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

Andover Threshold Days by Year (USC00390198)

19 fixed thresholds counted per year at Andover (USC00390198): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Andover Thresholds

  • Andover: days with 10 mm (0.39 in) or more of precipitation in 41 years, most in 1962 with 24.
  • Andover: days with 25 mm (0.98 in) or more of precipitation in 41 years, most in 1942 with 7.
  • Andover: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1945 with 193.
  • Andover: nights with a minimum temperature at or below -10 C (14 F) in 34 years, most in 1955 with 116.
  • 19 fixed thresholds have at least one qualifying day at Andover.
32 years with a qualifying day
Days at or above 30 C (86 F) per year at Andover Days per year at Andover with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 1959. 0204060801941: 451942: 141943: 391944: 251945: 251946: 261947: 381948: 471949: 601950: 301951: 231952: 621953: 431954: 451955: 731956: 531957: 361958: 531959: 771960: 481961: 491962: 261963: 451966: 391967: 341997: 231999: 142000: 272001: 392002: 492003: 302004: 1419411945194919531957196119672001
Days per year at Andover with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 1959.
Days at or above 30 C (86 F) per year at Andover
YearDaysDecade average
19414535.4
19421435.4
19433935.4
19442535.4
19452535.4
19462635.4
19473835.4
19484735.4
19496035.4
19503049.5
19512349.5
19526249.5
19534349.5
19544549.5
19557349.5
19565349.5
19573649.5
19585349.5
19597749.5
19604840.2
19614940.2
19622640.2
19634540.2
19663940.2
19673440.2
19972318.5
19991418.5
20002731.8
20013931.8
20024931.8
20033031.8
20041431.8
First to last qualifying date each year at Andover For each year, a bar from the first to the last day at Andover meeting 30 C (86 F). 1941: 13 May 1941 to 20 September 19411942: 8 July 1942 to 10 September 19421943: 28 May 1943 to 27 September 19431944: 15 May 1944 to 17 September 19441945: 21 June 1945 to 6 September 19451946: 28 May 1946 to 15 September 19461947: 3 July 1947 to 5 October 19471948: 18 May 1948 to 18 September 19481949: 30 April 1949 to 25 September 19491950: 22 May 1950 to 30 October 19501951: 28 April 1951 to 1 October 19511952: 26 April 1952 to 29 September 19521953: 7 May 1953 to 19 October 19531954: 23 June 1954 to 1 September 19541955: 30 April 1955 to 10 October 19551956: 3 June 1956 to 12 October 19561957: 20 June 1957 to 25 August 19571958: 16 April 1958 to 19 October 19581959: 30 April 1959 to 14 September 19591960: 13 May 1960 to 8 October 19601961: 19 April 1961 to 6 October 19611962: 24 April 1962 to 14 October 19621963: 7 May 1963 to 5 October 19631966: 25 May 1966 to 31 August 19661967: 22 May 1967 to 7 September 19671997: 17 May 1997 to 3 October 19971999: 5 June 1999 to 28 August 19992000: 6 May 2000 to 19 September 20002001: 14 May 2001 to 7 September 20012002: 30 May 2002 to 18 September 20022003: 14 April 2003 to 8 October 20032004: 29 April 2004 to 20 September 200419411945194919531957196119672001JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Andover meeting 30 C (86 F).
First to last qualifying date each year at Andover
YearFirst dateLast date
19411941-05-131941-09-20
19421942-07-081942-09-10
19431943-05-281943-09-27
19441944-05-151944-09-17
19451945-06-211945-09-06
19461946-05-281946-09-15
19471947-07-031947-10-05
19481948-05-181948-09-18
19491949-04-301949-09-25
19501950-05-221950-10-30
19511951-04-281951-10-01
19521952-04-261952-09-29
19531953-05-071953-10-19
19541954-06-231954-09-01
19551955-04-301955-10-10
19561956-06-031956-10-12
19571957-06-201957-08-25
19581958-04-161958-10-19
19591959-04-301959-09-14
19601960-05-131960-10-08
19611961-04-191961-10-06
19621962-04-241962-10-14
19631963-05-071963-10-05
19661966-05-251966-08-31
19671967-05-221967-09-07
19971997-05-171997-10-03
19991999-06-051999-08-28
20002000-05-062000-09-19
20012001-05-142001-09-07
20022002-05-302002-09-18
20032003-04-142003-10-08
20042004-04-292004-09-20

Every Fixed Threshold

Fixed thresholds at Andover
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3277195914
35 C (95 F): Days283919596
40 C (104 F): Days12819491
90 F (32.2 C): Days326519593
100 F (37.8 C): Days202319591
110 F (43.3 C): Days2219592
0 C (32 F): Ice days (max32106195551
0 C (32 F): Frost days (min341931945152
-10 C (14 F): Days with min34116195552
-20 C (-4 F): Days with min3454195123
-30 C (-22 F): Days with min311819632
20 C (68 F): Tropical nights (min332320025
25 C (77 F): Days with min6319472
10 mm (0.39 in): Days with 10 mm or more rain4124196223
25 mm (0.98 in): Days with 25 mm or more rain41719426
50 mm (1.97 in): Days with 50 mm or more rain21319661
100 mm (3.94 in): Days with 100 mm or more rain10n/a1
10 cm (3.9 in): Days with 10 cm or more snowfall31519561
25 cm (9.8 in): Days with 25 cm or more snowfall3119431

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.

Download the Data

  • Data for Andover 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).