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

Walpole Threshold Days by Year (ASN00009611)

3 fixed thresholds counted per year at Walpole (ASN00009611): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Walpole Thresholds

  • Walpole: days with 10 mm (0.39 in) or more of precipitation in 23 years, most in 1955 with 64.
  • Walpole: days with 25 mm (0.98 in) or more of precipitation in 23 years, most in 1955 with 18.
  • Walpole: days with 50 mm (1.97 in) or more of precipitation in 13 years, most in 1965 with 4.
  • 3 fixed thresholds have at least one qualifying day at Walpole.
23 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Walpole Days per year at Walpole with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 64 in 1955. 0204060801952: 531953: 371954: 481955: 641956: 401957: 401958: 451959: 401960: 471961: 531962: 501963: 481964: 631965: 611966: 491967: 521968: 451969: 301970: 421971: 411972: 261973: 472026: 1519521955195819611964196719701973
Days per year at Walpole with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 64 in 1955.
Days with 10 mm (0.39 in) or more of precipitation per year at Walpole
YearDaysDecade average
19525345.9
19533745.9
19544845.9
19556445.9
19564045.9
19574045.9
19584545.9
19594045.9
19604749.8
19615349.8
19625049.8
19634849.8
19646349.8
19656149.8
19664949.8
19675249.8
19684549.8
19693049.8
19704239
19714139
19722639
19734739
20261515
First to last qualifying date each year at Walpole For each year, a bar from the first to the last day at Walpole meeting 10 mm (0.39 in). 1952: 24 January 1952 to 24 December 19521953: 2 February 1953 to 3 December 19531954: 16 March 1954 to 10 December 19541955: 26 January 1955 to 14 December 19551956: 5 March 1956 to 4 December 19561957: 19 February 1957 to 22 October 19571958: 24 January 1958 to 11 November 19581959: 13 March 1959 to 30 December 19591960: 8 January 1960 to 10 October 19601961: 26 January 1961 to 20 November 19611962: 3 February 1962 to 29 December 19621963: 30 January 1963 to 5 November 19631964: 30 January 1964 to 19 December 19641965: 2 February 1965 to 20 December 19651966: 13 February 1966 to 28 December 19661967: 5 January 1967 to 24 December 19671968: 6 March 1968 to 21 October 19681969: 13 March 1969 to 24 November 19691970: 17 February 1970 to 4 November 19701971: 31 January 1971 to 23 November 19711972: 7 April 1972 to 7 October 19721973: 17 April 1973 to 5 November 19732026: 27 January 2026 to 27 August 202619521955195819611964196719701973JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Walpole meeting 10 mm (0.39 in).
First to last qualifying date each year at Walpole
YearFirst dateLast date
19521952-01-241952-12-24
19531953-02-021953-12-03
19541954-03-161954-12-10
19551955-01-261955-12-14
19561956-03-051956-12-04
19571957-02-191957-10-22
19581958-01-241958-11-11
19591959-03-131959-12-30
19601960-01-081960-10-10
19611961-01-261961-11-20
19621962-02-031962-12-29
19631963-01-301963-11-05
19641964-01-301964-12-19
19651965-02-021965-12-20
19661966-02-131966-12-28
19671967-01-051967-12-24
19681968-03-061968-10-21
19691969-03-131969-11-24
19701970-02-171970-11-04
19711971-01-311971-11-23
19721972-04-071972-10-07
19731973-04-171973-11-05
20262026-01-272026-08-27

Every Fixed Threshold

Fixed thresholds at Walpole
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2364195515
25 mm (0.98 in): Days with 25 mm or more rain231819555
50 mm (1.97 in): Days with 50 mm or more rain13419651

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

  • Data for Walpole 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 (2026-10-12).