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

Folsom Threshold Days by Year (USC00293242)

14 fixed thresholds counted per year at Folsom (USC00293242): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Folsom Thresholds

  • Folsom: days with 10 mm (0.39 in) or more of precipitation in 13 years, most in 1911 with 20.
  • Folsom: days with 25 mm (0.98 in) or more of precipitation in 13 years, most in 1905 with 8.
  • Folsom: days with 10 cm (3.9 in) or more of snowfall in 13 years, most in 1898 with 9.
  • Folsom: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 1899 with 46.
  • 14 fixed thresholds have at least one qualifying day at Folsom.
12 years with a qualifying day
Days at or above 30 C (86 F) per year at Folsom Days per year at Folsom with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 46 in 1899. 02040601898: 421899: 461900: 291901: 161902: 241903: 201904: 81905: 121906: 81907: 81911: 361912: 18189819001902190419061911
Days per year at Folsom with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 46 in 1899.
Days at or above 30 C (86 F) per year at Folsom
YearDaysDecade average
18984244
18994644
19002915.6
19011615.6
19022415.6
19032015.6
1904815.6
19051215.6
1906815.6
1907815.6
19113627
19121827
First to last qualifying date each year at Folsom For each year, a bar from the first to the last day at Folsom meeting 30 C (86 F). 1898: 2 June 1898 to 22 September 18981899: 14 May 1899 to 6 September 18991900: 25 June 1900 to 1 September 19001901: 23 June 1901 to 3 August 19011902: 19 June 1902 to 7 September 19021903: 29 June 1903 to 21 August 19031904: 9 July 1904 to 13 August 19041905: 27 June 1905 to 29 August 19051906: 27 June 1906 to 14 August 19061907: 29 June 1907 to 10 August 19071911: 5 June 1911 to 28 September 19111912: 3 June 1912 to 26 August 1912189819001902190419061911JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Folsom meeting 30 C (86 F).
First to last qualifying date each year at Folsom
YearFirst dateLast date
18981898-06-021898-09-22
18991899-05-141899-09-06
19001900-06-251900-09-01
19011901-06-231901-08-03
19021902-06-191902-09-07
19031903-06-291903-08-21
19041904-07-091904-08-13
19051905-06-271905-08-29
19061906-06-271906-08-14
19071907-06-291907-08-10
19111911-06-051911-09-28
19121912-06-031912-08-26

Every Fixed Threshold

Fixed thresholds at Folsom
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1246189918
35 C (95 F): Days1118991
90 F (32.2 C): Days81718991
0 C (32 F): Ice days (max1224191117
0 C (32 F): Frost days (min111911912191
-10 C (14 F): Days with min1165190347
-20 C (-4 F): Days with min10819113
10 mm (0.39 in): Days with 10 mm or more rain1320191117
25 mm (0.98 in): Days with 25 mm or more rain13819053
50 mm (1.97 in): Days with 50 mm or more rain8319011
100 mm (3.94 in): Days with 100 mm or more rain1119041
10 cm (3.9 in): Days with 10 cm or more snowfall13918986
25 cm (9.8 in): Days with 25 cm or more snowfall4118991
50 cm (19.7 in): Days with 50 cm or more snowfall1118991

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

Download the Data

  • Data for Folsom 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).