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

Ames Threshold Days by Year (USC00050228)

12 fixed thresholds counted per year at Ames (USC00050228): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ames Thresholds

  • Ames: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1916 with 34.
  • Ames: days with 10 cm (3.9 in) or more of snowfall in 52 years, most in 1936 with 26.
  • Ames: days with 25 mm (0.98 in) or more of precipitation in 49 years, most in 1941 with 8.
  • Ames: days with 25 cm (9.8 in) or more of snowfall in 41 years, most in 1938 with 7.
  • 12 fixed thresholds have at least one qualifying day at Ames.
6 years with a qualifying day
Nights at or below 0 C (32 F) per year at Ames Days per year at Ames with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 230 in 1983. 01002003001971: 2241978: 2161980: 2151981: 2141982: 2271983: 230197119781980198119821983
Days per year at Ames with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 230 in 1983.
Nights at or below 0 C (32 F) per year at Ames
YearDaysDecade average
1971224220
1978216220
1980215221.5
1981214221.5
1982227221.5
1983230221.5
First to last qualifying date each year at Ames For each year, a bar from the first to the last day at Ames meeting 0 C (32 F). 1971: 1 January 1971 to 31 December 19711978: 1 January 1978 to 31 December 19781980: 1 January 1980 to 31 December 19801981: 1 January 1981 to 31 December 19811982: 1 January 1982 to 31 December 19821983: 1 January 1983 to 31 December 1983197119781980198119821983JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ames meeting 0 C (32 F).
First to last qualifying date each year at Ames
YearFirst dateLast date
19711971-01-011971-12-31
19781978-01-011978-12-31
19801980-01-011980-12-31
19811981-01-011981-12-31
19821982-01-011982-12-31
19831983-01-011983-12-31

Every Fixed Threshold

Fixed thresholds at Ames
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1219712
0 C (32 F): Ice days (max753197132
0 C (32 F): Frost days (min62301983230
-10 C (14 F): Days with min6104197182
-20 C (-4 F): Days with min62519714
-30 C (-22 F): Days with min2319711
10 mm (0.39 in): Days with 10 mm or more rain6034191615
25 mm (0.98 in): Days with 25 mm or more rain49819414
50 mm (1.97 in): Days with 50 mm or more rain7219411
10 cm (3.9 in): Days with 10 cm or more snowfall5226193616
25 cm (9.8 in): Days with 25 cm or more snowfall41719381
50 cm (19.7 in): Days with 50 cm or more snowfall2119441

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

Download the Data

  • Data for Ames 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).