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Built 2026-10-19 (19 October 2026)

Fallen Leaf Threshold Days by Year (USS0020L10S)

11 fixed thresholds counted per year at Fallen Leaf (USS0020L10S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Fallen Leaf Thresholds

  • Fallen Leaf: days with 10 mm (0.39 in) or more of precipitation in 47 years, most in 1996 with 51.
  • Fallen Leaf: days with 25 mm (0.98 in) or more of precipitation in 47 years, most in 1996 with 24.
  • Fallen Leaf: days with 50 mm (1.97 in) or more of precipitation in 39 years, most in 2017 with 8.
  • Fallen Leaf: days with a maximum temperature at or below 0 C (32 F) in 33 years, most in 2008 with 20.
  • 11 fixed thresholds have at least one qualifying day at Fallen Leaf.
20 years with a qualifying day
Days at or above 30 C (86 F) per year at Fallen Leaf Days per year at Fallen Leaf with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 13 in 2021. 0510151991: 21993: 11994: 101996: 11997: 11998: 72000: 32001: 42002: 12007: 12013: 12014: 12016: 22020: 22021: 132022: 12023: 42024: 42025: 102026: 31991199419972000200220132016202120232025
Days per year at Fallen Leaf with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 13 in 2021.
Days at or above 30 C (86 F) per year at Fallen Leaf
YearDaysDecade average
199123.7
199313.7
1994103.7
199613.7
199713.7
199873.7
200032.3
200142.3
200212.3
200712.3
201311.3
201411.3
201621.3
202025.3
2021135.3
202215.3
202345.3
202445.3
2025105.3
202635.3
First to last qualifying date each year at Fallen Leaf For each year, a bar from the first to the last day at Fallen Leaf meeting 30 C (86 F). 1991: 4 July 1991 to 29 July 19911993: 2 August 1993 to 2 August 19931994: 21 July 1994 to 17 August 19941996: 30 August 1996 to 30 August 19961997: 7 August 1997 to 7 August 19971998: 16 July 1998 to 30 August 19982000: 30 July 2000 to 1 August 20002001: 3 July 2001 to 18 August 20012002: 10 July 2002 to 10 July 20022007: 6 July 2007 to 6 July 20072013: 21 July 2013 to 21 July 20132014: 14 July 2014 to 14 July 20142016: 27 July 2016 to 29 July 20162020: 18 August 2020 to 4 September 20202021: 17 June 2021 to 16 August 20212022: 2 September 2022 to 2 September 20222023: 15 July 2023 to 22 July 20232024: 6 July 2024 to 11 July 20242025: 31 May 2025 to 22 August 20252026: 6 August 2026 to 10 August 20261991199620002007201620222025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Fallen Leaf meeting 30 C (86 F).
First to last qualifying date each year at Fallen Leaf
YearFirst dateLast date
19911991-07-041991-07-29
19931993-08-021993-08-02
19941994-07-211994-08-17
19961996-08-301996-08-30
19971997-08-071997-08-07
19981998-07-161998-08-30
20002000-07-302000-08-01
20012001-07-032001-08-18
20022002-07-102002-07-10
20072007-07-062007-07-06
20132013-07-212013-07-21
20142014-07-142014-07-14
20162016-07-272016-07-29
20202020-08-182020-09-04
20212021-06-172021-08-16
20222022-09-022022-09-02
20232023-07-152023-07-22
20242024-07-062024-07-11
20252025-05-312025-08-22
20262026-08-062026-08-10

Every Fixed Threshold

Fixed thresholds at Fallen Leaf
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days201320213
90 F (32.2 C): Days2220212
0 C (32 F): Ice days (max332020085
0 C (32 F): Frost days (min322431998121
-10 C (14 F): Days with min325219945
-20 C (-4 F): Days with min7319982
10 mm (0.39 in): Days with 10 mm or more rain4751199616
25 mm (0.98 in): Days with 25 mm or more rain472419966
50 mm (1.97 in): Days with 50 mm or more rain39820171
100 mm (3.94 in): Days with 100 mm or more rain11220051
200 mm (7.87 in): Days with 200 mm or more rain1120211

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1991.

Download the Data

  • Data for Fallen Leaf 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 (2026-10-17).