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

San Manuel Threshold Days by Year (USC00417981)

14 fixed thresholds counted per year at San Manuel (USC00417981): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Manuel Thresholds

  • San Manuel: days with 10 mm (0.39 in) or more of precipitation in 8 years, most in 2021 with 21.
  • San Manuel: days with 25 mm (0.98 in) or more of precipitation in 8 years, most in 2021 with 10.
  • San Manuel: days with 50 mm (1.97 in) or more of precipitation in 8 years, most in 2021 with 3.
  • San Manuel: days with a maximum temperature at or above 30 C (86 F) in 4 years, most in 2025 with 248.
  • 14 fixed thresholds have at least one qualifying day at San Manuel.
4 years with a qualifying day
Days at or above 30 C (86 F) per year at San Manuel Days per year at San Manuel with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 248 in 2025. 01002003002021: 2122022: 2342024: 2442025: 2482021202220242025
Days per year at San Manuel with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 248 in 2025.
Days at or above 30 C (86 F) per year at San Manuel
YearDaysDecade average
2021212234.5
2022234234.5
2024244234.5
2025248234.5
First to last qualifying date each year at San Manuel For each year, a bar from the first to the last day at San Manuel meeting 30 C (86 F). 2021: 26 January 2021 to 31 December 20212022: 1 January 2022 to 14 December 20222024: 9 January 2024 to 31 December 20242025: 6 January 2025 to 29 December 20252021202220242025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at San Manuel meeting 30 C (86 F).
First to last qualifying date each year at San Manuel
YearFirst dateLast date
20212021-01-262021-12-31
20222022-01-012022-12-14
20242024-01-092024-12-31
20252025-01-062025-12-29

Every Fixed Threshold

Fixed thresholds at San Manuel
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days42482025248
35 C (95 F): Days41272022115
40 C (104 F): Days3820246
90 F (32.2 C): Days41982024194
100 F (37.8 C): Days466202436
110 F (43.3 C): Days1120241
0 C (32 F): Ice days (max1120221
0 C (32 F): Frost days (min41720224
20 C (68 F): Tropical nights (min41742025174
25 C (77 F): Days with min439202439
10 mm (0.39 in): Days with 10 mm or more rain82120214
25 mm (0.98 in): Days with 25 mm or more rain81020213
50 mm (1.97 in): Days with 50 mm or more rain8320211
100 mm (3.94 in): Days with 100 mm or more rain2120251

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2021.

Download the Data

  • Data for San Manuel 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).