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

Summerville Threshold Days by Year (CA008205650)

12 fixed thresholds counted per year at Summerville (CA008205650): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Summerville Thresholds

  • Summerville: days with a maximum temperature at or below 0 C (32 F) in 18 years, most in 1970 with 79.
  • Summerville: nights with a minimum temperature at or below 0 C (32 F) in 18 years, most in 1972 with 188.
  • Summerville: nights with a minimum temperature at or below -10 C (14 F) in 18 years, most in 1972 with 62.
  • Summerville: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1967 with 45.
  • 12 fixed thresholds have at least one qualifying day at Summerville.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Summerville Days per year at Summerville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 1975. 02461966: 11968: 11969: 21970: 31972: 11975: 61976: 11977: 41978: 11979: 31982: 1196619691972197619781982
Days per year at Summerville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 1975.
Days at or above 30 C (86 F) per year at Summerville
YearDaysDecade average
196611.3
196811.3
196921.3
197032.7
197212.7
197562.7
197612.7
197742.7
197812.7
197932.7
198211
First to last qualifying date each year at Summerville For each year, a bar from the first to the last day at Summerville meeting 30 C (86 F). 1966: 19 July 1966 to 19 July 19661968: 16 July 1968 to 16 July 19681969: 16 July 1969 to 1 September 19691970: 24 July 1970 to 26 July 19701972: 16 July 1972 to 16 July 19721975: 24 June 1975 to 11 August 19751976: 22 August 1976 to 22 August 19761977: 23 May 1977 to 29 August 19771978: 17 August 1978 to 17 August 19781979: 16 June 1979 to 3 August 19791982: 19 July 1982 to 19 July 1982196619691972197619781982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Summerville meeting 30 C (86 F).
First to last qualifying date each year at Summerville
YearFirst dateLast date
19661966-07-191966-07-19
19681968-07-161968-07-16
19691969-07-161969-09-01
19701970-07-241970-07-26
19721972-07-161972-07-16
19751975-06-241975-08-11
19761976-08-221976-08-22
19771977-05-231977-08-29
19781978-08-171978-08-17
19791979-06-161979-08-03
19821982-07-191982-07-19

Every Fixed Threshold

Fixed thresholds at Summerville
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days11619751
90 F (32.2 C): Days1119761
0 C (32 F): Ice days (max1879197045
0 C (32 F): Frost days (min181881972129
-10 C (14 F): Days with min1862197235
-20 C (-4 F): Days with min17919712
20 C (68 F): Tropical nights (min9419791
10 mm (0.39 in): Days with 10 mm or more rain1845196736
25 mm (0.98 in): Days with 25 mm or more rain181119669
50 mm (1.97 in): Days with 50 mm or more rain8219701
10 cm (3.9 in): Days with 10 cm or more snowfall181119714
25 cm (9.8 in): Days with 25 cm or more snowfall9219672

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1966.

Download the Data

  • Data for Summerville 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).