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Monthly climate in Williston, Northern Cape, South Africa

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Williston features a cold desert climate (BWk).Temperatures typically range between 10 °C (51 °F) and 26 °C (79 °F) through the year, but rarely can drop to -4 °C (24 °F) or can rise to as high as 42 °C (107 °F).The average annual precipitation amounts to about 120 mm (4.7 inches) and receives 16 rainy days on the 1 mm (0.04 inches) threshold annually.Williston enjoys an average of 4162 hours of sunshine throughout the year, and daylight varies from 10 hours 7 minutes to 14 hours 8 minutes per day.

Monthly average temperatures in Williston, Northern Cape, South Africa §

The warmest months in Williston are January, February and December, with daily mean temperatures ranging from 23 to 26 °C (74 - 79 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 10 to 11 °C (51 - 53 °F) throughout the day. On average each year, Williston experiences 188 days above 25 °C (77.0 °F) and 9 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Williston, Northern Cape, 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 42°C
(107°F)		 39°C
(103°F)		 37°C
(98°F)		 35°C
(95°F)		 30°C
(87°F)		 26°C
(79°F)		 26°C
(79°F)		 30°C
(87°F)		 34°C
(94°F)		 39°C
(102°F)		 40°C
(105°F)		 38°C
(100°F)
Mean maximum 39°C
(102°F)		 38°C
(101°F)		 36°C
(96°F)		 32°C
(89°F)		 28°C
(83°F)		 23°C
(74°F)		 24°C
(75°F)		 28°C
(82°F)		 32°C
(89°F)		 36°C
(96°F)		 37°C
(99°F)		 37°C
(99°F)
Average high 34°C
(93°F)		 33°C
(91°F)		 30°C
(87°F)		 26°C
(78°F)		 22°C
(73°F)		 18°C
(65°F)		 18°C
(65°F)		 19°C
(66°F)		 24°C
(75°F)		 27°C
(80°F)		 29°C
(84°F)		 31°C
(88°F)
Daily mean 26°C
(79°F)		 25°C
(78°F)		 23°C
(73°F)		 18°C
(65°F)		 15°C
(59°F)		 11°C
(53°F)		 10°C
(51°F)		 11°C
(52°F)		 15°C
(60°F)		 19°C
(66°F)		 21°C
(70°F)		 23°C
(74°F)
Average low 18°C
(64°F)		 18°C
(64°F)		 15°C
(60°F)		 12°C
(53°F)		 8°C
(47°F)		 5°C
(41°F)		 4°C
(39°F)		 4°C
(39°F)		 8°C
(46°F)		 10°C
(51°F)		 12°C
(55°F)		 15°C
(59°F)
Mean minimum 11°C
(52°F)		 12°C
(54°F)		 10°C
(50°F)		 5°C
(42°F)		 1°C
(33°F)		 -2°C
(29°F)		 -3°C
(28°F)		 -2°C
(30°F)		 1°C
(34°F)		 4°C
(39°F)		 6°C
(42°F)		 9°C
(49°F)
Minimum 10°C
(50°F)		 8°C
(47°F)		 8°C
(46°F)		 4°C
(40°F)		 -2°C
(29°F)		 -3°C
(27°F)		 -4°C
(24°F)		 -3°C
(27°F)		 -2°C
(29°F)		 2°C
(36°F)		 3°C
(38°F)		 8°C
(46°F)

Compare climate in Williston with other places

Compare temperature, precipitation, sunshine, UV index in Williston, Northern Cape, South Africa with other places around the world.

Monthly average precipitation in Williston, Northern Cape, South Africa §

Williston usually has the most precipitation in March, April and October, with an average of 1 rainy days and 19 mm (0.7 inches) of precipitation per month.The driest months in Williston are June, August and September. On average, 4 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Williston, Northern Cape, 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) 10 (0.4) 11 (0.4) 15 (0.6) 28 (1.1) 6 (0.2) 5 (0.2) 8 (0.3) 2 (0.1) 5 (0.2) 13 (0.5) 6 (0.2) 11 (0.5)
Average precipitation days (≥ 1 mm) 2 2 1 2 1 1 2 0 1 1 1 2

Monthly sunshine hours in Williston, Northern Cape, South Africa §

The sunniest months in Williston are October, November and December, when the sun shines an average of 13 hours 2 minutes a day.Least sunny months in Williston: May, June and July receive an average of 9 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Williston, Northern Cape, 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 340 357 366 323 307 289 305 327 343 379 397 422
Mean daily daylight hours 13h 54m 13h 10m 12h 13m 11h 17m 10h 30m 10h 7m 10h 19m 11h 0m 11h 54m 12h 51m 13h 42m 14h 8m

Solar UV radiation in Williston, Northern Cape, South Africa §

Williston 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 6. For more detailed information, check out our hourly Williston UV Index data.

Average daily maximum UV levels by month for Williston, Northern Cape, 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 12 9 6 4 5 7 11 12 14 16