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Built 2026-10-19 (19 October 2026)

Rubicon #2 Threshold Days by Year (USS0020L02S)

10 fixed thresholds counted per year at Rubicon #2 (USS0020L02S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rubicon #2 Thresholds

  • Rubicon #2: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1983 with 66.
  • Rubicon #2: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1983 with 31.
  • Rubicon #2: days with 50 mm (1.97 in) or more of precipitation in 42 years, most in 2017 with 10.
  • Rubicon #2: days with a maximum temperature at or below 0 C (32 F) in 35 years, most in 1998 with 59.
  • 10 fixed thresholds have at least one qualifying day at Rubicon #2.
6 years with a qualifying day
Days at or above 30 C (86 F) per year at Rubicon #2 Days per year at Rubicon #2 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 2002. 01231998: 12002: 32003: 32021: 12022: 12023: 2199820022003202120222023
Days per year at Rubicon #2 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 2002.
Days at or above 30 C (86 F) per year at Rubicon #2
YearDaysDecade average
199811
200233
200333
202111.3
202211.3
202321.3
First to last qualifying date each year at Rubicon #2 For each year, a bar from the first to the last day at Rubicon #2 meeting 30 C (86 F). 1998: 13 August 1998 to 13 August 19982002: 9 July 2002 to 11 July 20022003: 22 July 2003 to 30 July 20032021: 12 July 2021 to 12 July 20212022: 6 September 2022 to 6 September 20222023: 15 July 2023 to 16 July 2023199820022003202120222023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rubicon #2 meeting 30 C (86 F).
First to last qualifying date each year at Rubicon #2
YearFirst dateLast date
19981998-08-131998-08-13
20022002-07-092002-07-11
20032003-07-222003-07-30
20212021-07-122021-07-12
20222022-09-062022-09-06
20232023-07-152023-07-16

Every Fixed Threshold

Fixed thresholds at Rubicon #2
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days6320022
90 F (32.2 C): Days1120021
0 C (32 F): Ice days (max3559199812
0 C (32 F): Frost days (min31192199874
-10 C (14 F): Days with min312820234
20 C (68 F): Tropical nights (min2120211
10 mm (0.39 in): Days with 10 mm or more rain4666198316
25 mm (0.98 in): Days with 25 mm or more rain453119837
50 mm (1.97 in): Days with 50 mm or more rain421020171
100 mm (3.94 in): Days with 100 mm or more rain8119811

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1998.

Download the Data

  • Data for Rubicon #2 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).