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

Speedwell Threshold Days by Year

4 fixed thresholds counted per year at Speedwell (ASN00040191): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Speedwell Thresholds

  • Speedwell: days with 10 mm (0.39 in) or more of precipitation in 15 years, most in 1947 with 30.
  • Speedwell: days with 25 mm (0.98 in) or more of precipitation in 15 years, most in 1949 with 15.
  • Speedwell: days with 50 mm (1.97 in) or more of precipitation in 11 years, most in 1942 with 5.
  • Speedwell: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1937 with 1.
  • 4 fixed thresholds have at least one qualifying day at Speedwell.
15 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Speedwell Days per year at Speedwell with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 30 in 1947. 01020301936: 201937: 211938: 271939: 251940: 211941: 91942: 281943: 231944: 161945: 201946: 151947: 301948: 191949: 291951: 819361938194019421944194619481951
Days per year at Speedwell with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 30 in 1947.
Days with 10 mm (0.39 in) or more of precipitation per year at Speedwell
YearDaysDecade average
19362023.3
19372123.3
19382723.3
19392523.3
19402121
1941921
19422821
19432321
19441621
19452021
19461521
19473021
19481921
19492921
195188
First to last qualifying date each year at Speedwell For each year, a bar from the first to the last day at Speedwell meeting 10 mm (0.39 in). 1936: 9 January 1936 to 31 December 19361937: 3 January 1937 to 29 December 19371938: 19 January 1938 to 28 November 19381939: 1 January 1939 to 27 December 19391940: 14 January 1940 to 3 December 19401941: 24 January 1941 to 22 November 19411942: 17 January 1942 to 31 December 19421943: 15 January 1943 to 19 December 19431944: 17 February 1944 to 20 December 19441945: 2 February 1945 to 20 December 19451946: 7 January 1946 to 31 December 19461947: 24 January 1947 to 21 December 19471948: 3 January 1948 to 31 December 19481949: 9 January 1949 to 17 December 19491951: 7 February 1951 to 13 December 195119361938194019421944194619481951JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Speedwell meeting 10 mm (0.39 in).
First to last qualifying date each year at Speedwell
YearFirst dateLast date
19361936-01-091936-12-31
19371937-01-031937-12-29
19381938-01-191938-11-28
19391939-01-011939-12-27
19401940-01-141940-12-03
19411941-01-241941-11-22
19421942-01-171942-12-31
19431943-01-151943-12-19
19441944-02-171944-12-20
19451945-02-021945-12-20
19461946-01-071946-12-31
19471947-01-241947-12-21
19481948-01-031948-12-31
19491949-01-091949-12-17
19511951-02-071951-12-13

Every Fixed Threshold

Fixed thresholds at Speedwell
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain153019478
25 mm (0.98 in): Days with 25 mm or more rain151519491
50 mm (1.97 in): Days with 50 mm or more rain11519425
100 mm (3.94 in): Days with 100 mm or more rain1119371

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1936.

Download the Data

  • Data for Speedwell 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

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