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Weather & Climate in Heidelberg, South Africa
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Heidelberg enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winters average 69°F in January while summers reach 49°F in July / relatively mild seasonal variation. The area gets 288 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 26.7 inches (drier than the 38-inch national average). The city sits at an elevation of 5,003 feet.
Temperature
69°F Jan (20°C)
49°F Jul (9°C)
| Annual Average | 60.3°F |
| 12% above US avg | |
| January Average | 69°F (20°C) |
| July Average | 49°F (9°C) |
| Sunny Days | 288 days/yr |
Geography
| Elevation | 5,003 ft (1,525 m) |
| Area | 956.7 sq mi (2,477.7 km²) |
| Population Density | 90/sq mi |
| Coordinates | -26.5048°N, 28.3592°W |
| Timezone | Africa/Johannesburg |
Precipitation & Snow
Air Quality
Earthquake History
586 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.0.
| Jun 14, 2010 | 8 km NNW of Fochville, South Africa | M5.0 | 89 km | 2 km |
| Jun 11, 2023 | Gauteng, South Africa | M4.9 | 28 km | 5 km |
| Dec 5, 1998 | 9 km NNE of Fochville, South Africa | M4.9 | 84 km | 10 km |
| Mar 7, 1992 | 14 km W of Fochville, South Africa | M4.9 | 100 km | 10 km |
| Mar 1, 2019 | 6 km WSW of Soweto, South Africa | M4.9 | 61 km | 5 km |
| Aug 6, 2000 | 8 km SSW of Westonaria, South Africa | M4.9 | 76 km | 5 km |
| Mar 7, 2019 | 6 km E of Fochville, South Africa | M4.8 | 80 km | 5 km |
| Oct 9, 2009 | 7 km NW of Fochville, South Africa | M4.7 | 92 km | 2 km |
| Jul 12, 2002 | 14 km NNW of eMbalenhle, South Africa | M4.7 | 66 km | 5 km |
| Sep 25, 1997 | 1 km SE of Carletonville, South Africa | M4.7 | 96 km | 5 km |
| Mar 13, 2022 | 14 km W of eMbalenhle, South Africa | M4.7 | 56 km | 5 km |
| Apr 6, 1993 | 3 km NW of Carletonville, South Africa | M4.7 | 100 km | 5 km |
| Jan 26, 2000 | 18 km W of Vredefort, South Africa | M4.7 | 131 km | 5 km |
| Aug 16, 2012 | 6 km ESE of Westonaria, South Africa | M4.7 | 67 km | 5 km |
| Oct 28, 1995 | 10 km W of Westonaria, South Africa | M4.7 | 83 km | 5 km |
| Jul 13, 2000 | 9 km SW of Westonaria, South Africa | M4.7 | 79 km | 10 km |
| Jun 11, 2015 | 6 km N of Fochville, South Africa | M4.6 | 87 km | 5 km |
| Mar 28, 2018 | 6 km E of Fochville, South Africa | M4.6 | 79 km | 5 km |
| Aug 31, 2014 | 14 km WSW of Carletonville, South Africa | M4.6 | 109 km | 5 km |
| Jul 19, 2003 | 9 km SW of Carletonville, South Africa | M4.6 | 103 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 69°F (20°C) | 4.5 in | Warmest, Wettest |
| February | 68°F (20°C) | 3.7 in | |
| March | 66°F (19°C) | 3.3 in | |
| April | 60°F (16°C) | 1.5 in | |
| May | 54°F (12°C) | 0.7 in | |
| June | 48°F (9°C) | 0.2 in | Coldest, Driest |
| July | 49°F (9°C) | 0.3 in | |
| August | 53°F (12°C) | 0.3 in | |
| September | 60°F (16°C) | 0.9 in | |
| October | 64°F (18°C) | 2.7 in | |
| November | 66°F (19°C) | 4.4 in | |
| December | 68°F (20°C) | 4.2 in |
Heidelberg has a seasonal temperature swing of 20°F / from 48°F in June to 69°F in January. Total annual precipitation is 26.7 inches, with January being the wettest month (4.5") and June the driest (0.2").