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Monthly climate in Heilbron, Orange Free State, South Africa

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Heilbron features a humid subtropical climate (Cwa).Temperatures typically range between 10 °C (50 °F) and 21 °C (70 °F) through the year, but rarely can drop to -5 °C (24 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 701 mm (27.6 inches) and receives 82 rainy days on the 1 mm (0.04 inches) threshold annually.Heilbron enjoys an average of 4038 hours of sunshine throughout the year, and daylight varies from 10 hours 25 minutes to 13 hours 49 minutes per day.

Monthly average temperatures in Heilbron, Orange Free State, South Africa §

The warmest months in Heilbron are January, February and December, with daily mean temperatures ranging from 21 to 21 °C (69 - 70 °F) throughout the day. The coldest temperatures usually occur in May, June and July, when daily mean temperatures range from 10 to 13 °C (50 - 56 °F) throughout the day. On average each year, Heilbron experiences 144 days above 25 °C (77.0 °F) and 8 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Heilbron, Orange Free State, South Africa.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 35°C
(95°F)		 33°C
(91°F)		 32°C
(90°F)		 31°C
(88°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(77°F)		 28°C
(82°F)		 32°C
(91°F)		 34°C
(93°F)		 35°C
(95°F)		 36°C
(97°F)
Mean maximum 32°C
(89°F)		 31°C
(88°F)		 30°C
(86°F)		 29°C
(84°F)		 25°C
(77°F)		 22°C
(72°F)		 23°C
(74°F)		 27°C
(80°F)		 32°C
(89°F)		 33°C
(91°F)		 34°C
(93°F)		 32°C
(90°F)
Average high 27°C
(81°F)		 26°C
(80°F)		 26°C
(79°F)		 23°C
(74°F)		 21°C
(71°F)		 19°C
(66°F)		 19°C
(66°F)		 22°C
(71°F)		 26°C
(79°F)		 26°C
(79°F)		 27°C
(82°F)		 27°C
(81°F)
Daily mean 21°C
(70°F)		 21°C
(70°F)		 20°C
(67°F)		 16°C
(62°F)		 13°C
(56°F)		 10°C
(50°F)		 10°C
(50°F)		 13°C
(56°F)		 17°C
(63°F)		 19°C
(66°F)		 20°C
(69°F)		 21°C
(69°F)
Average low 16°C
(61°F)		 16°C
(61°F)		 14°C
(57°F)		 11°C
(52°F)		 6°C
(43°F)		 3°C
(38°F)		 2°C
(37°F)		 6°C
(43°F)		 9°C
(49°F)		 12°C
(53°F)		 14°C
(57°F)		 15°C
(60°F)
Mean minimum 12°C
(54°F)		 12°C
(54°F)		 11°C
(51°F)		 5°C
(42°F)		 2°C
(36°F)		 -1°C
(30°F)		 -3°C
(27°F)		 -0°C
(32°F)		 2°C
(36°F)		 6°C
(43°F)		 8°C
(46°F)		 11°C
(52°F)
Minimum 9°C
(49°F)		 11°C
(52°F)		 9°C
(48°F)		 3°C
(38°F)		 -2°C
(28°F)		 -5°C
(24°F)		 -5°C
(24°F)		 -2°C
(28°F)		 -1°C
(31°F)		 3°C
(38°F)		 4°C
(39°F)		 10°C
(50°F)

Compare climate in Heilbron with other places

Compare temperature, precipitation, sunshine, UV index in Heilbron, Orange Free State, South Africa with other places around the world.

Monthly average precipitation in Heilbron, Orange Free State, South Africa §

Heilbron usually has the most precipitation in January, February and December, with an average of 14 rainy days and 128 mm (5.0 inches) of precipitation per month.The driest months in Heilbron are July, August and September. On average, 6 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Heilbron, Orange Free State, South Africa.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 109 (4.3) 114 (4.5) 70 (2.8) 66 (2.6) 11 (0.4) 8 (0.3) 3 (0.1) 7 (0.3) 7 (0.3) 53 (2.1) 91 (3.6) 160 (6.3)
Average precipitation days (≥ 1 mm) 12 13 9 9 2 1 0 1 2 6 10 17

Monthly sunshine hours in Heilbron, Orange Free State, South Africa §

The sunniest months in Heilbron are October, November and December, when the sun shines an average of 12 hours 13 minutes a day.Least sunny months in Heilbron: January, June and July receive an average of 10 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Heilbron, Orange Free State, South Africa.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 312 327 355 317 319 298 314 328 338 365 375 384
Mean daily daylight hours 13h 37m 13h 0m 12h 12m 11h 24m 10h 44m 10h 25m 10h 35m 11h 10m 11h 55m 12h 44m 13h 27m 13h 49m

Solar UV radiation in Heilbron, Orange Free State, South Africa §

Heilbron experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure.May, June and July are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 7. For more detailed information, check out our hourly Heilbron UV Index data.

Average daily maximum UV levels by month for Heilbron, Orange Free State, South Africa.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 15 15 13 11 7 5 6 8 11 12 14 16