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Data as of 2025-12-31
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Built 2026-10-17 (17 October 2026)

Alderley Station Threshold Days by Year

4 fixed thresholds counted per year at Alderley Station (ASN00030003): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alderley Station Thresholds

  • Alderley Station: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1918 with 24.
  • Alderley Station: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 1917 with 13.
  • Alderley Station: days with 50 mm (1.97 in) or more of precipitation in 22 years, most in 1917 with 5.
  • Alderley Station: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1912 with 1.
  • 4 fixed thresholds have at least one qualifying day at Alderley Station.
32 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Alderley Station Days per year at Alderley Station with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 24 in 1918. 01020301912: 81913: 161914: 141915: 81916: 211917: 231918: 241919: 91920: 191921: 181922: 141923: 51924: 221925: 81926: 31927: 151928: 91929: 121930: 131931: 51932: 81933: 191934: 61935: 61936: 201937: 131938: 111939: 111940: 191941: 201942: 121943: 1119121916192019241928193219361940
Days per year at Alderley Station with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 24 in 1918.
Days with 10 mm (0.39 in) or more of precipitation per year at Alderley Station
YearDaysDecade average
1912815.4
19131615.4
19141415.4
1915815.4
19162115.4
19172315.4
19182415.4
1919915.4
19201912.5
19211812.5
19221412.5
1923512.5
19242212.5
1925812.5
1926312.5
19271512.5
1928912.5
19291212.5
19301311.2
1931511.2
1932811.2
19331911.2
1934611.2
1935611.2
19362011.2
19371311.2
19381111.2
19391111.2
19401915.5
19412015.5
19421215.5
19431115.5
First to last qualifying date each year at Alderley Station For each year, a bar from the first to the last day at Alderley Station meeting 10 mm (0.39 in). 1912: 11 February 1912 to 30 December 19121913: 9 February 1913 to 20 December 19131914: 14 January 1914 to 26 December 19141915: 10 January 1915 to 29 December 19151916: 30 January 1916 to 31 December 19161917: 1 January 1917 to 1 December 19171918: 4 January 1918 to 30 December 19181919: 12 January 1919 to 7 December 19191920: 11 January 1920 to 8 December 19201921: 15 January 1921 to 27 December 19211922: 30 January 1922 to 25 December 19221923: 3 January 1923 to 26 December 19231924: 11 February 1924 to 16 December 19241925: 21 January 1925 to 8 August 19251926: 29 January 1926 to 25 September 19261927: 24 January 1927 to 23 December 19271928: 17 January 1928 to 23 December 19281929: 4 January 1929 to 16 November 19291930: 18 January 1930 to 18 December 19301931: 15 January 1931 to 25 December 19311932: 7 February 1932 to 24 December 19321933: 5 January 1933 to 30 November 19331934: 31 January 1934 to 9 November 19341935: 4 January 1935 to 6 November 19351936: 7 January 1936 to 31 December 19361937: 2 January 1937 to 27 November 19371938: 11 January 1938 to 7 November 19381939: 3 January 1939 to 23 December 19391940: 22 January 1940 to 31 December 19401941: 2 January 1941 to 11 December 19411942: 3 February 1942 to 29 December 19421943: 3 February 1943 to 20 December 194319121916192019241928193219361940JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alderley Station meeting 10 mm (0.39 in).
First to last qualifying date each year at Alderley Station
YearFirst dateLast date
19121912-02-111912-12-30
19131913-02-091913-12-20
19141914-01-141914-12-26
19151915-01-101915-12-29
19161916-01-301916-12-31
19171917-01-011917-12-01
19181918-01-041918-12-30
19191919-01-121919-12-07
19201920-01-111920-12-08
19211921-01-151921-12-27
19221922-01-301922-12-25
19231923-01-031923-12-26
19241924-02-111924-12-16
19251925-01-211925-08-08
19261926-01-291926-09-25
19271927-01-241927-12-23
19281928-01-171928-12-23
19291929-01-041929-11-16
19301930-01-181930-12-18
19311931-01-151931-12-25
19321932-02-071932-12-24
19331933-01-051933-11-30
19341934-01-311934-11-09
19351935-01-041935-11-06
19361936-01-071936-12-31
19371937-01-021937-11-27
19381938-01-111938-11-07
19391939-01-031939-12-23
19401940-01-221940-12-31
19411941-01-021941-12-11
19421942-02-031942-12-29
19431943-02-031943-12-20

Every Fixed Threshold

Fixed thresholds at Alderley Station
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3224191811
25 mm (0.98 in): Days with 25 mm or more rain321319175
50 mm (1.97 in): Days with 50 mm or more rain22519172
100 mm (3.94 in): Days with 100 mm or more rain6119121

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

  • Data for Alderley Station 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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