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

Willow West Threshold Days by Year (USC00509861)

14 fixed thresholds counted per year at Willow West (USC00509861): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Willow West Thresholds

  • Willow West: days with 10 mm (0.39 in) or more of precipitation in 12 years, most in 1967 with 30.
  • Willow West: days with 25 mm (0.98 in) or more of precipitation in 11 years, most in 1964 with 9.
  • Willow West: days with 10 cm (3.9 in) or more of snowfall in 11 years, most in 1998 with 5.
  • Willow West: days with a maximum temperature at or below 0 C (32 F) in 8 years, most in 1999 with 122.
  • 14 fixed thresholds have at least one qualifying day at Willow West.
8 years with a qualifying day
Nights at or below 0 C (32 F) per year at Willow West Days per year at Willow West with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 240 in 1970. 01002003001964: 2181965: 2221967: 2201969: 2241970: 2401998: 2121999: 2092000: 21919641965196719691970199819992000
Days per year at Willow West with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 240 in 1970.
Nights at or below 0 C (32 F) per year at Willow West
YearDaysDecade average
1964218221
1965222221
1967220221
1969224221
1970240240
1998212210.5
1999209210.5
2000219219
First to last qualifying date each year at Willow West For each year, a bar from the first to the last day at Willow West meeting 0 C (32 F). 1964: 10 January 1964 to 31 December 19641965: 1 January 1965 to 31 December 19651967: 1 January 1967 to 31 December 19671969: 1 January 1969 to 31 December 19691970: 1 January 1970 to 31 December 19701998: 1 January 1998 to 31 December 19981999: 1 January 1999 to 31 December 19992000: 1 January 2000 to 31 December 200019641965196719691970199819992000JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Willow West meeting 0 C (32 F).
First to last qualifying date each year at Willow West
YearFirst dateLast date
19641964-01-101964-12-31
19651965-01-011965-12-31
19671967-01-011967-12-31
19691969-01-011969-12-31
19701970-01-011970-12-31
19981998-01-011998-12-31
19991999-01-011999-12-31
20002000-01-012000-12-31

Every Fixed Threshold

Fixed thresholds at Willow West
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2319691
90 F (32.2 C): Days1219692
0 C (32 F): Ice days (max8122199992
0 C (32 F): Frost days (min82401970219
-10 C (14 F): Days with min81281999101
-20 C (-4 F): Days with min876196432
-30 C (-22 F): Days with min83619998
-40 C (-40 F): Days with min410199910
10 mm (0.39 in): Days with 10 mm or more rain123019677
25 mm (0.98 in): Days with 25 mm or more rain11919641
50 mm (1.97 in): Days with 50 mm or more rain4219992
10 cm (3.9 in): Days with 10 cm or more snowfall11519985
25 cm (9.8 in): Days with 25 cm or more snowfall5119981
50 cm (19.7 in): Days with 50 cm or more snowfall3119981

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1969.

Download the Data

  • Data for Willow West 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).