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

Richland Threshold Days by Year (USC00307077)

13 fixed thresholds counted per year at Richland (USC00307077): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Richland Thresholds

  • Richland: days with 10 cm (3.9 in) or more of snowfall in 4 years, most in 1950 with 15.
  • Richland: days with a maximum temperature at or above 30 C (86 F) in 3 years, most in 1948 with 14.
  • Richland: days with a maximum temperature at or below 0 C (32 F) in 3 years, most in 1948 with 60.
  • Richland: nights with a minimum temperature at or below 0 C (32 F) in 3 years, most in 1950 with 149.
  • 13 fixed thresholds have at least one qualifying day at Richland.
3 years with a qualifying day
Days at or above 30 C (86 F) per year at Richland Days per year at Richland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 14 in 1948. 0510151948: 141950: 71951: 6194819501951
Days per year at Richland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 14 in 1948.
Days at or above 30 C (86 F) per year at Richland
YearDaysDecade average
19481414
195076.5
195166.5
First to last qualifying date each year at Richland For each year, a bar from the first to the last day at Richland meeting 30 C (86 F). 1948: 30 June 1948 to 7 September 19481950: 10 June 1950 to 28 August 19501951: 20 June 1951 to 14 September 1951194819501951JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Richland meeting 30 C (86 F).
First to last qualifying date each year at Richland
YearFirst dateLast date
19481948-06-301948-09-07
19501950-06-101950-08-28
19511951-06-201951-09-14

Every Fixed Threshold

Fixed thresholds at Richland
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days31419486
90 F (32.2 C): Days2719481
0 C (32 F): Ice days (max360194844
0 C (32 F): Frost days (min31491950133
-10 C (14 F): Days with min348194837
-20 C (-4 F): Days with min32319487
-30 C (-22 F): Days with min1319483
20 C (68 F): Tropical nights (min3619481
10 mm (0.39 in): Days with 10 mm or more rain355195155
25 mm (0.98 in): Days with 25 mm or more rain31319507
50 mm (1.97 in): Days with 50 mm or more rain1219502
10 cm (3.9 in): Days with 10 cm or more snowfall415195012
25 cm (9.8 in): Days with 25 cm or more snowfall3419504

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

  • Data for Richland 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).