Daily records
Page built 2026-10-16
Data as of 2025-12-31
Search
Built 2026-10-16 (16 October 2026)

Keystone Ridge Threshold Days by Year

13 fixed thresholds counted per year at Keystone Ridge (USC00504621): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Keystone Ridge Thresholds

  • Keystone Ridge: days with a maximum temperature at or below 0 C (32 F) in 28 years, most in 1999 with 180.
  • Keystone Ridge: nights with a minimum temperature at or below 0 C (32 F) in 28 years, most in 2000 with 235.
  • Keystone Ridge: nights with a minimum temperature at or below -10 C (14 F) in 28 years, most in 2008 with 156.
  • Keystone Ridge: nights with a minimum temperature at or below -20 C (-4 F) in 28 years, most in 2012 with 83.
  • 13 fixed thresholds have at least one qualifying day at Keystone Ridge.
5 years with a qualifying day
Days at or above 30 C (86 F) per year at Keystone Ridge Days per year at Keystone Ridge with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 2013. 011221999: 12004: 12009: 12013: 22016: 119992004200920132016
Days per year at Keystone Ridge with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 2013.
Days at or above 30 C (86 F) per year at Keystone Ridge
YearDaysDecade average
199911
200411
200911
201321.5
201611.5
First to last qualifying date each year at Keystone Ridge For each year, a bar from the first to the last day at Keystone Ridge meeting 30 C (86 F). 1999: 13 June 1999 to 13 June 19992004: 20 June 2004 to 20 June 20042009: 8 July 2009 to 8 July 20092013: 25 June 2013 to 26 June 20132016: 14 July 2016 to 14 July 201619992004200920132016JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Keystone Ridge meeting 30 C (86 F).
First to last qualifying date each year at Keystone Ridge
YearFirst dateLast date
19991999-06-131999-06-13
20042004-06-202004-06-20
20092009-07-082009-07-08
20132013-06-252013-06-26
20162016-07-142016-07-14

Every Fixed Threshold

Fixed thresholds at Keystone Ridge
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days5220131
0 C (32 F): Ice days (max281801999147
0 C (32 F): Frost days (min282352000208
-10 C (14 F): Days with min281562008108
-20 C (-4 F): Days with min2883201237
-30 C (-22 F): Days with min252820127
-40 C (-40 F): Days with min3419991
20 C (68 F): Tropical nights (min2120191
10 mm (0.39 in): Days with 10 mm or more rain281720169
25 mm (0.98 in): Days with 25 mm or more rain18420141
50 mm (1.97 in): Days with 50 mm or more rain4220161
10 cm (3.9 in): Days with 10 cm or more snowfall261020213
25 cm (9.8 in): Days with 25 cm or more snowfall6220121

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1999.

Download the Data

  • Data for Keystone Ridge 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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