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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Ascot Threshold Days by Year

5 fixed thresholds counted per year at Ascot (ASN00040339): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ascot Thresholds

  • Ascot: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1927 with 48.
  • Ascot: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1927 with 22.
  • Ascot: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 1927 with 9.
  • Ascot: days with 100 mm (3.94 in) or more of precipitation in 12 years, most in 1921 with 3.
  • 5 fixed thresholds have at least one qualifying day at Ascot.
30 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Ascot Days per year at Ascot with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1927. 02040601899: 281900: 241901: 261902: 131904: 241905: 201906: 361907: 301908: 321909: 321910: 331911: 271912: 301913: 361914: 281915: 191916: 341917: 341918: 231919: 141920: 341921: 371922: 301923: 251924: 351925: 411926: 301927: 481928: 251929: 301899190219061909191219151918192119241927
Days per year at Ascot with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1927.
Days with 10 mm (0.39 in) or more of precipitation per year at Ascot
YearDaysDecade average
18992828
19002426.3
19012626.3
19021326.3
19042426.3
19052026.3
19063626.3
19073026.3
19083226.3
19093226.3
19103327.8
19112727.8
19123027.8
19133627.8
19142827.8
19151927.8
19163427.8
19173427.8
19182327.8
19191427.8
19203433.5
19213733.5
19223033.5
19232533.5
19243533.5
19254133.5
19263033.5
19274833.5
19282533.5
19293033.5
First to last qualifying date each year at Ascot For each year, a bar from the first to the last day at Ascot meeting 10 mm (0.39 in). 1899: 5 January 1899 to 31 December 18991900: 4 January 1900 to 18 November 19001901: 21 January 1901 to 14 October 19011902: 4 January 1902 to 7 December 19021904: 2 January 1904 to 20 December 19041905: 15 January 1905 to 29 December 19051906: 1 January 1906 to 23 December 19061907: 11 January 1907 to 28 December 19071908: 4 January 1908 to 28 December 19081909: 17 January 1909 to 29 December 19091910: 9 January 1910 to 19 December 19101911: 3 January 1911 to 4 December 19111912: 6 January 1912 to 21 December 19121913: 1 January 1913 to 19 December 19131914: 13 January 1914 to 29 December 19141915: 2 January 1915 to 17 December 19151916: 30 January 1916 to 14 December 19161917: 14 January 1917 to 26 December 19171918: 4 January 1918 to 18 December 19181919: 20 February 1919 to 31 December 19191920: 1 January 1920 to 9 December 19201921: 7 January 1921 to 31 December 19211922: 1 January 1922 to 27 December 19221923: 7 January 1923 to 27 December 19231924: 7 January 1924 to 27 December 19241925: 2 January 1925 to 31 December 19251926: 1 January 1926 to 30 December 19261927: 5 January 1927 to 26 December 19271928: 7 January 1928 to 24 December 19281929: 10 January 1929 to 30 December 192918991904190819121916192019241928JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ascot meeting 10 mm (0.39 in).
First to last qualifying date each year at Ascot
YearFirst dateLast date
18991899-01-051899-12-31
19001900-01-041900-11-18
19011901-01-211901-10-14
19021902-01-041902-12-07
19041904-01-021904-12-20
19051905-01-151905-12-29
19061906-01-011906-12-23
19071907-01-111907-12-28
19081908-01-041908-12-28
19091909-01-171909-12-29
19101910-01-091910-12-19
19111911-01-031911-12-04
19121912-01-061912-12-21
19131913-01-011913-12-19
19141914-01-131914-12-29
19151915-01-021915-12-17
19161916-01-301916-12-14
19171917-01-141917-12-26
19181918-01-041918-12-18
19191919-02-201919-12-31
19201920-01-011920-12-09
19211921-01-071921-12-31
19221922-01-011922-12-27
19231923-01-071923-12-27
19241924-01-071924-12-27
19251925-01-021925-12-31
19261926-01-011926-12-30
19271927-01-051927-12-26
19281928-01-071928-12-24
19291929-01-101929-12-30

Every Fixed Threshold

Fixed thresholds at Ascot
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3048192730
25 mm (0.98 in): Days with 25 mm or more rain3022192713
50 mm (1.97 in): Days with 50 mm or more rain29919273
100 mm (3.94 in): Days with 100 mm or more rain12319211
200 mm (7.87 in): Days with 200 mm or more rain1119081

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

  • Data for Ascot 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

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