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

Merchant Valley Threshold Days by Year (USS0012L12S)

9 fixed thresholds counted per year at Merchant Valley (USS0012L12S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Merchant Valley Thresholds

  • Merchant Valley: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1983 with 49.
  • Merchant Valley: days with 25 mm (0.98 in) or more of precipitation in 43 years, most in 1983 with 14.
  • Merchant Valley: days with a maximum temperature at or below 0 C (32 F) in 23 years, most in 2023 with 53.
  • Merchant Valley: nights with a minimum temperature at or below 0 C (32 F) in 23 years, most in 2008 with 242.
  • 9 fixed thresholds have at least one qualifying day at Merchant Valley.
4 years with a qualifying day
Days at or above 30 C (86 F) per year at Merchant Valley Days per year at Merchant Valley with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 2020. 011222020: 22021: 22023: 12024: 12020202120232024
Days per year at Merchant Valley with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 2020.
Days at or above 30 C (86 F) per year at Merchant Valley
YearDaysDecade average
202021.5
202121.5
202311.5
202411.5
First to last qualifying date each year at Merchant Valley For each year, a bar from the first to the last day at Merchant Valley meeting 30 C (86 F). 2020: 17 August 2020 to 18 August 20202021: 9 July 2021 to 10 July 20212023: 16 July 2023 to 16 July 20232024: 12 July 2024 to 12 July 20242020202120232024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Merchant Valley meeting 30 C (86 F).
First to last qualifying date each year at Merchant Valley
YearFirst dateLast date
20202020-08-172020-08-18
20212021-07-092021-07-10
20232023-07-162023-07-16
20242024-07-122024-07-12

Every Fixed Threshold

Fixed thresholds at Merchant Valley
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days4220201
0 C (32 F): Ice days (max235320239
0 C (32 F): Frost days (min232422008106
-10 C (14 F): Days with min2378200816
-20 C (-4 F): Days with min211820132
10 mm (0.39 in): Days with 10 mm or more rain464919836
25 mm (0.98 in): Days with 25 mm or more rain431419832
50 mm (1.97 in): Days with 50 mm or more rain12219971
100 mm (3.94 in): Days with 100 mm or more rain1119881

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2020.

Download the Data

  • Data for Merchant Valley 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 (2026-10-12).