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

Johannesburg Intl Threshold Days by Year (SFM00068368)

6 fixed thresholds counted per year at Johannesburg Intl (SFM00068368): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Johannesburg Intl Thresholds

  • Johannesburg Intl: days with a maximum temperature at or above 30 C (86 F) in 19 years, most in 1992 with 40.
  • Johannesburg Intl: days with a maximum temperature at or above 90 F (32.2 C) in 10 years, most in 1983 with 8.
  • Johannesburg Intl: days with 10 mm (0.39 in) or more of precipitation in 8 years, most in 1983 with 34.
  • Johannesburg Intl: days with 25 mm (0.98 in) or more of precipitation in 8 years, most in 1997 with 10.
  • 6 fixed thresholds have at least one qualifying day at Johannesburg Intl.
19 years with a qualifying day
Days at or above 30 C (86 F) per year at Johannesburg Intl Days per year at Johannesburg Intl with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1992. 0102030401982: 121983: 281984: 211985: 181986: 11987: 81990: 101991: 61992: 401993: 101994: 51995: 151996: 71997: 141998: 21999: 102001: 52014: 82015: 361982198419861990199219941996199820012015
Days per year at Johannesburg Intl with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 40 in 1992.
Days at or above 30 C (86 F) per year at Johannesburg Intl
YearDaysDecade average
19821214.7
19832814.7
19842114.7
19851814.7
1986114.7
1987814.7
19901011.9
1991611.9
19924011.9
19931011.9
1994511.9
19951511.9
1996711.9
19971411.9
1998211.9
19991011.9
200155
2014822
20153622
First to last qualifying date each year at Johannesburg Intl For each year, a bar from the first to the last day at Johannesburg Intl meeting 30 C (86 F). 1982: 1 January 1982 to 30 December 19821983: 5 January 1983 to 31 October 19831984: 12 January 1984 to 31 December 19841985: 1 January 1985 to 25 November 19851986: 14 January 1986 to 14 January 19861987: 28 January 1987 to 11 December 19871990: 11 November 1990 to 2 December 19901991: 1 January 1991 to 8 October 19911992: 7 January 1992 to 29 December 19921993: 6 January 1993 to 22 January 19931994: 12 January 1994 to 23 December 19941995: 27 January 1995 to 13 October 19951996: 3 January 1996 to 6 November 19961997: 21 February 1997 to 9 November 19971998: 7 February 1998 to 8 February 19981999: 28 February 1999 to 5 November 19992001: 10 January 2001 to 25 January 20012014: 16 January 2014 to 5 December 20142015: 10 February 2015 to 31 December 20151982198519901993199619992015JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Johannesburg Intl meeting 30 C (86 F).
First to last qualifying date each year at Johannesburg Intl
YearFirst dateLast date
19821982-01-011982-12-30
19831983-01-051983-10-31
19841984-01-121984-12-31
19851985-01-011985-11-25
19861986-01-141986-01-14
19871987-01-281987-12-11
19901990-11-111990-12-02
19911991-01-011991-10-08
19921992-01-071992-12-29
19931993-01-061993-01-22
19941994-01-121994-12-23
19951995-01-271995-10-13
19961996-01-031996-11-06
19971997-02-211997-11-09
19981998-02-071998-02-08
19991999-02-281999-11-05
20012001-01-102001-01-25
20142014-01-162014-12-05
20152015-02-102015-12-31

Every Fixed Threshold

Fixed thresholds at Johannesburg Intl
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1940199236
35 C (95 F): Days1119831
90 F (32.2 C): Days10819837
10 mm (0.39 in): Days with 10 mm or more rain834198323
25 mm (0.98 in): Days with 25 mm or more rain81019975
50 mm (1.97 in): Days with 50 mm or more rain3319973

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1982.

Download the Data

  • Data for Johannesburg Intl 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).