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Data as of 2025-12-31
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Built 2026-10-17 (17 October 2026)

Santa Monica Threshold Days by Year

9 fixed thresholds counted per year at Santa Monica (USC00047950): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Santa Monica Thresholds

  • Santa Monica: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1941 with 27.
  • Santa Monica: days with 25 mm (0.98 in) or more of precipitation in 48 years, most in 1918 with 11.
  • Santa Monica: days with 50 mm (1.97 in) or more of precipitation in 30 years, most in 1938 with 4.
  • Santa Monica: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 1909 with 9.
  • 9 fixed thresholds have at least one qualifying day at Santa Monica.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Santa Monica Days per year at Santa Monica with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 9 in 1909. 0358101901: 41903: 51906: 51907: 51909: 91910: 21912: 71913: 31914: 91915: 11917: 11918: 8190119061909191219141917
Days per year at Santa Monica with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 9 in 1909.
Days at or above 30 C (86 F) per year at Santa Monica
YearDaysDecade average
190145.6
190355.6
190655.6
190755.6
190995.6
191024.4
191274.4
191334.4
191494.4
191514.4
191714.4
191884.4
First to last qualifying date each year at Santa Monica For each year, a bar from the first to the last day at Santa Monica meeting 30 C (86 F). 1901: 28 February 1901 to 21 October 19011903: 19 August 1903 to 27 November 19031906: 25 July 1906 to 1 October 19061907: 4 July 1907 to 1 December 19071909: 29 August 1909 to 24 October 19091910: 30 September 1910 to 24 October 19101912: 14 January 1912 to 17 October 19121913: 19 October 1913 to 8 November 19131914: 16 March 1914 to 20 November 19141915: 30 August 1915 to 30 August 19151917: 27 September 1917 to 27 September 19171918: 3 August 1918 to 31 October 1918190119061909191219141917JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Santa Monica meeting 30 C (86 F).
First to last qualifying date each year at Santa Monica
YearFirst dateLast date
19011901-02-281901-10-21
19031903-08-191903-11-27
19061906-07-251906-10-01
19071907-07-041907-12-01
19091909-08-291909-10-24
19101910-09-301910-10-24
19121912-01-141912-10-17
19131913-10-191913-11-08
19141914-03-161914-11-20
19151915-08-301915-08-30
19171917-09-271917-09-27
19181918-08-031918-10-31

Every Fixed Threshold

Fixed thresholds at Santa Monica
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days12919098
35 C (95 F): Days2119091
90 F (32.2 C): Days9619092
0 C (32 F): Frost days (min9519161
20 C (68 F): Tropical nights (min7319091
10 mm (0.39 in): Days with 10 mm or more rain522719418
25 mm (0.98 in): Days with 25 mm or more rain481119181
50 mm (1.97 in): Days with 50 mm or more rain30419382
100 mm (3.94 in): Days with 100 mm or more rain10119131

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

  • Data for Santa Monica 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).