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

Rock Hill 3 SW Threshold Days by Year (USC00307210)

15 fixed thresholds counted per year at Rock Hill 3 SW (USC00307210): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rock Hill 3 SW Thresholds

  • Rock Hill 3 SW: days with 10 mm (0.39 in) or more of precipitation in 49 years, most in 2011 with 62.
  • Rock Hill 3 SW: days with 25 mm (0.98 in) or more of precipitation in 49 years, most in 2011 with 23.
  • Rock Hill 3 SW: days with 10 cm (3.9 in) or more of snowfall in 47 years, most in 1983 with 8.
  • Rock Hill 3 SW: days with 50 mm (1.97 in) or more of precipitation in 44 years, most in 2011 with 10.
  • 15 fixed thresholds have at least one qualifying day at Rock Hill 3 SW.
5 years with a qualifying day
Days at or above 30 C (86 F) per year at Rock Hill 3 SW Days per year at Rock Hill 3 SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 2010. 01020302009: 102010: 262011: 122012: 192021: 1620092010201120122021
Days per year at Rock Hill 3 SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 2010.
Days at or above 30 C (86 F) per year at Rock Hill 3 SW
YearDaysDecade average
20091010
20102619
20111219
20121919
20211616
First to last qualifying date each year at Rock Hill 3 SW For each year, a bar from the first to the last day at Rock Hill 3 SW meeting 30 C (86 F). 2009: 26 April 2009 to 19 August 20092010: 2 May 2010 to 3 September 20102011: 1 June 2011 to 2 August 20112012: 29 May 2012 to 5 August 20122021: 22 May 2021 to 27 August 202120092010201120122021JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rock Hill 3 SW meeting 30 C (86 F).
First to last qualifying date each year at Rock Hill 3 SW
YearFirst dateLast date
20092009-04-262009-08-19
20102010-05-022010-09-03
20112011-06-012011-08-02
20122012-05-292012-08-05
20212021-05-222021-08-27

Every Fixed Threshold

Fixed thresholds at Rock Hill 3 SW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days526201016
35 C (95 F): Days2320101
90 F (32.2 C): Days5920103
0 C (32 F): Ice days (max562201042
0 C (32 F): Frost days (min51712010150
-10 C (14 F): Days with min556200936
-20 C (-4 F): Days with min2520094
20 C (68 F): Tropical nights (min4620103
10 mm (0.39 in): Days with 10 mm or more rain4962201141
25 mm (0.98 in): Days with 25 mm or more rain4923201115
50 mm (1.97 in): Days with 50 mm or more rain441020115
100 mm (3.94 in): Days with 100 mm or more rain8119641
10 cm (3.9 in): Days with 10 cm or more snowfall47819832
25 cm (9.8 in): Days with 25 cm or more snowfall28319671
50 cm (19.7 in): Days with 50 cm or more snowfall3119661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2009.

Download the Data

  • Data for Rock Hill 3 SW 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).