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

Grahamstown Threshold Days by Year (SF000570480)

11 fixed thresholds counted per year at Grahamstown (SF000570480): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grahamstown Thresholds

  • Grahamstown: days with 10 mm (0.39 in) or more of precipitation in 114 years, most in 1893 with 35.
  • Grahamstown: days with 25 mm (0.98 in) or more of precipitation in 114 years, most in 1886 with 12.
  • Grahamstown: days with 50 mm (1.97 in) or more of precipitation in 79 years, most in 1970 with 5.
  • Grahamstown: days with 100 mm (3.94 in) or more of precipitation in 14 years, most in 1979 with 2.
  • 11 fixed thresholds have at least one qualifying day at Grahamstown.
9 years with a qualifying day
Days at or above 30 C (86 F) per year at Grahamstown Days per year at Grahamstown with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 2016. 0204060802014: 512015: 492016: 662018: 562019: 492020: 412021: 472022: 632026: 23201420152016201820192020202120222026
Days per year at Grahamstown with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 2016.
Days at or above 30 C (86 F) per year at Grahamstown
YearDaysDecade average
20145154.2
20154954.2
20166654.2
20185654.2
20194954.2
20204143.5
20214743.5
20226343.5
20262343.5
First to last qualifying date each year at Grahamstown For each year, a bar from the first to the last day at Grahamstown meeting 30 C (86 F). 2014: 1 January 2014 to 10 December 20142015: 8 January 2015 to 31 December 20152016: 1 January 2016 to 31 December 20162018: 4 January 2018 to 31 December 20182019: 1 January 2019 to 23 December 20192020: 8 January 2020 to 9 December 20202021: 3 January 2021 to 11 December 20212022: 9 January 2022 to 28 December 20222026: 8 January 2026 to 17 April 202620142016201920212026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Grahamstown meeting 30 C (86 F).
First to last qualifying date each year at Grahamstown
YearFirst dateLast date
20142014-01-012014-12-10
20152015-01-082015-12-31
20162016-01-012016-12-31
20182018-01-042018-12-31
20192019-01-012019-12-23
20202020-01-082020-12-09
20212021-01-032021-12-11
20222022-01-092022-12-28
20262026-01-082026-04-17

Every Fixed Threshold

Fixed thresholds at Grahamstown
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days966201623
35 C (95 F): Days91820143
40 C (104 F): Days2120191
90 F (32.2 C): Days939201611
100 F (37.8 C): Days6620162
0 C (32 F): Frost days (min4220141
20 C (68 F): Tropical nights (min64202018
10 mm (0.39 in): Days with 10 mm or more rain1143518932
25 mm (0.98 in): Days with 25 mm or more rain1141218861
50 mm (1.97 in): Days with 50 mm or more rain79519701
100 mm (3.94 in): Days with 100 mm or more rain14219791

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2014.

Download the Data

  • Data for Grahamstown 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 (2026-10-12).