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

Chehalis Threshold Days by Year (USC00451330)

10 fixed thresholds counted per year at Chehalis (USC00451330): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chehalis Thresholds

  • Chehalis: days with a maximum temperature at or above 30 C (86 F) in 5 years, most in 1897 with 42.
  • Chehalis: days with a maximum temperature at or above 90 F (32.2 C) in 5 years, most in 1897 with 21.
  • Chehalis: days with a maximum temperature at or above 35 C (95 F) in 4 years, most in 1897 with 10.
  • Chehalis: days with a maximum temperature at or below 0 C (32 F) in 4 years, most in 1896 with 7.
  • 10 fixed thresholds have at least one qualifying day at Chehalis.
5 years with a qualifying day
Days at or above 30 C (86 F) per year at Chehalis Days per year at Chehalis with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 42 in 1897. 02040601893: 41896: 401897: 421939: 201940: 1218931896189719391940
Days per year at Chehalis with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 42 in 1897.
Days at or above 30 C (86 F) per year at Chehalis
YearDaysDecade average
1893428.7
18964028.7
18974228.7
19392020
19401212
First to last qualifying date each year at Chehalis For each year, a bar from the first to the last day at Chehalis meeting 30 C (86 F). 1893: 4 June 1893 to 31 August 18931896: 29 May 1896 to 28 September 18961897: 16 April 1897 to 25 September 18971939: 13 May 1939 to 21 September 19391940: 10 June 1940 to 29 August 194018931896189719391940JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chehalis meeting 30 C (86 F).
First to last qualifying date each year at Chehalis
YearFirst dateLast date
18931893-06-041893-08-31
18961896-05-291896-09-28
18971897-04-161897-09-25
19391939-05-131939-09-21
19401940-06-101940-08-29

Every Fixed Threshold

Fixed thresholds at Chehalis
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days542189712
35 C (95 F): Days41018971
90 F (32.2 C): Days52118975
100 F (37.8 C): Days2118961
0 C (32 F): Ice days (max4718961
0 C (32 F): Frost days (min474193961
-10 C (14 F): Days with min2318962
10 mm (0.39 in): Days with 10 mm or more rain345189744
25 mm (0.98 in): Days with 25 mm or more rain3818975
50 mm (1.97 in): Days with 50 mm or more rain1318973

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

  • Data for Chehalis 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).