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

Sperling Threshold Days by Year (CA005022740)

5 fixed thresholds counted per year at Sperling (CA005022740): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sperling Thresholds

  • Sperling: days with 10 mm (0.39 in) or more of precipitation in 13 years, most in 1979 with 18.
  • Sperling: days with 25 mm (0.98 in) or more of precipitation in 12 years, most in 1977 with 6.
  • Sperling: days with 10 cm (3.9 in) or more of snowfall in 12 years, most in 1970 with 5.
  • Sperling: days with 50 mm (1.97 in) or more of precipitation in 3 years, most in 1971 with 1.
  • 5 fixed thresholds have at least one qualifying day at Sperling.
13 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Sperling Days per year at Sperling with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 18 in 1979. 051015201970: 131971: 151972: 61973: 131974: 91975: 141976: 121977: 171979: 181980: 121981: 141982: 151983: 121970197219741976197919811983
Days per year at Sperling with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 18 in 1979.
Days with 10 mm (0.39 in) or more of precipitation per year at Sperling
YearDaysDecade average
19701313
19711513
1972613
19731313
1974913
19751413
19761213
19771713
19791813
19801213.3
19811413.3
19821513.3
19831213.3
First to last qualifying date each year at Sperling For each year, a bar from the first to the last day at Sperling meeting 10 mm (0.39 in). 1970: 7 January 1970 to 25 October 19701971: 13 March 1971 to 30 October 19711972: 4 June 1972 to 28 December 19721973: 4 May 1973 to 19 November 19731974: 27 February 1974 to 5 October 19741975: 26 March 1975 to 2 December 19751976: 27 February 1976 to 26 August 19761977: 24 February 1977 to 19 November 19771979: 5 February 1979 to 21 August 19791980: 27 June 1980 to 7 November 19801981: 25 January 1981 to 12 October 19811982: 3 January 1982 to 22 December 19821983: 5 March 1983 to 19 November 19831970197219741976197919811983JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Sperling meeting 10 mm (0.39 in).
First to last qualifying date each year at Sperling
YearFirst dateLast date
19701970-01-071970-10-25
19711971-03-131971-10-30
19721972-06-041972-12-28
19731973-05-041973-11-19
19741974-02-271974-10-05
19751975-03-261975-12-02
19761976-02-271976-08-26
19771977-02-241977-11-19
19791979-02-051979-08-21
19801980-06-271980-11-07
19811981-01-251981-10-12
19821982-01-031982-12-22
19831983-03-051983-11-19

Every Fixed Threshold

Fixed thresholds at Sperling
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1318197912
25 mm (0.98 in): Days with 25 mm or more rain12619772
50 mm (1.97 in): Days with 50 mm or more rain3119711
10 cm (3.9 in): Days with 10 cm or more snowfall12519703
25 cm (9.8 in): Days with 25 cm or more snowfall1119711

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.

Download the Data

  • Data for Sperling 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).