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

The Rock Rch Threshold Days by Year (USC00098657)

13 fixed thresholds counted per year at The Rock Rch (USC00098657): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for The Rock Rch Thresholds

  • The Rock Rch: days with 10 mm (0.39 in) or more of precipitation in 4 years, most in 1950 with 40.
  • The Rock Rch: days with 25 mm (0.98 in) or more of precipitation in 4 years, most in 2011 with 14.
  • The Rock Rch: days with a maximum temperature at or above 30 C (86 F) in 3 years, most in 2018 with 128.
  • The Rock Rch: days with a maximum temperature at or above 35 C (95 F) in 3 years, most in 2011 with 28.
  • 13 fixed thresholds have at least one qualifying day at The Rock Rch.
3 years with a qualifying day
Days at or above 30 C (86 F) per year at The Rock Rch Days per year at The Rock Rch with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 128 in 2018. 0501001502011: 1222012: 902018: 128201120122018
Days per year at The Rock Rch with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 128 in 2018.
Days at or above 30 C (86 F) per year at The Rock Rch
YearDaysDecade average
2011122113.3
201290113.3
2018128113.3
First to last qualifying date each year at The Rock Rch For each year, a bar from the first to the last day at The Rock Rch meeting 30 C (86 F). 2011: 10 April 2011 to 28 September 20112012: 29 April 2012 to 28 September 20122018: 10 May 2018 to 17 October 2018201120122018JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at The Rock Rch meeting 30 C (86 F).
First to last qualifying date each year at The Rock Rch
YearFirst dateLast date
20112011-04-102011-09-28
20122012-04-292012-09-28
20182018-05-102018-10-17

Every Fixed Threshold

Fixed thresholds at The Rock Rch
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days31282018128
35 C (95 F): Days32820115
40 C (104 F): Days1220122
90 F (32.2 C): Days3102201176
100 F (37.8 C): Days2320123
0 C (32 F): Ice days (max2120111
0 C (32 F): Frost days (min347201139
-10 C (14 F): Days with min1120181
20 C (68 F): Tropical nights (min31122018112
25 C (77 F): Days with min1120121
10 mm (0.39 in): Days with 10 mm or more rain440195033
25 mm (0.98 in): Days with 25 mm or more rain41420117
50 mm (1.97 in): Days with 50 mm or more rain3320111

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2011.

Download the Data

  • Data for The Rock Rch 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).