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Monthly climate in Grahamstown, Eastern Cape, South Africa

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Grahamstown features a humid subtropical climate (Cfa).Temperatures typically range between 13 °C (56 °F) and 21 °C (71 °F) through the year, but rarely can drop to 0 °C (32 °F) or can rise to as high as 42 °C (108 °F).The average annual precipitation amounts to about 494 mm (19.5 inches) and receives 82 rainy days on the 1 mm (0.04 inches) threshold annually.Grahamstown enjoys an average of 3851 hours of sunshine throughout the year, and daylight varies from 9 hours 57 minutes to 14 hours 18 minutes per day.

Monthly average temperatures in Grahamstown, Eastern Cape, South Africa §

The warmest months in Grahamstown are January, February and March, with daily mean temperatures ranging from 20 to 21 °C (69 - 71 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 13 to 14 °C (56 - 58 °F) throughout the day. On average each year, Grahamstown experiences 147 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grahamstown, Eastern 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 41°C
(107°F)		 40°C
(104°F)		 41°C
(107°F)		 37°C
(98°F)		 32°C
(90°F)		 32°C
(89°F)		 32°C
(90°F)		 32°C
(90°F)		 39°C
(102°F)		 42°C
(108°F)		 40°C
(104°F)		 40°C
(104°F)
Mean maximum 39°C
(102°F)		 38°C
(100°F)		 39°C
(103°F)		 35°C
(94°F)		 31°C
(89°F)		 27°C
(81°F)		 30°C
(86°F)		 31°C
(87°F)		 35°C
(96°F)		 38°C
(100°F)		 36°C
(97°F)		 36°C
(96°F)
Average high 28°C
(82°F)		 28°C
(82°F)		 27°C
(80°F)		 24°C
(75°F)		 23°C
(74°F)		 22°C
(72°F)		 22°C
(71°F)		 20°C
(69°F)		 23°C
(74°F)		 24°C
(75°F)		 25°C
(76°F)		 26°C
(79°F)
Daily mean 21°C
(71°F)		 21°C
(71°F)		 20°C
(69°F)		 17°C
(64°F)		 16°C
(61°F)		 14°C
(58°F)		 14°C
(57°F)		 13°C
(56°F)		 15°C
(60°F)		 17°C
(63°F)		 18°C
(64°F)		 20°C
(68°F)
Average low 16°C
(61°F)		 16°C
(62°F)		 15°C
(60°F)		 13°C
(55°F)		 10°C
(50°F)		 8°C
(47°F)		 7°C
(46°F)		 7°C
(45°F)		 10°C
(49°F)		 11°C
(52°F)		 12°C
(54°F)		 14°C
(58°F)
Mean minimum 11°C
(52°F)		 11°C
(53°F)		 10°C
(50°F)		 8°C
(46°F)		 5°C
(41°F)		 3°C
(38°F)		 1°C
(34°F)		 2°C
(36°F)		 4°C
(39°F)		 5°C
(41°F)		 8°C
(46°F)		 9°C
(49°F)
Minimum 9°C
(48°F)		 10°C
(50°F)		 8°C
(46°F)		 6°C
(44°F)		 4°C
(39°F)		 1°C
(34°F)		 -0°C
(32°F)		 1°C
(34°F)		 1°C
(34°F)		 4°C
(40°F)		 5°C
(42°F)		 7°C
(46°F)

Compare climate in Grahamstown with other places

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

Monthly average precipitation in Grahamstown, Eastern Cape, South Africa §

Grahamstown usually has the most precipitation in February, November and December, with an average of 10 rainy days and 64 mm (2.5 inches) of precipitation per month.The driest months in Grahamstown are May, June and July. On average, 13 mm (0.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grahamstown, Eastern 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) 50 (2.0) 73 (2.9) 52 (2.1) 45 (1.8) 22 (0.9) 5 (0.2) 11 (0.4) 28 (1.1) 36 (1.4) 53 (2.1) 53 (2.1) 64 (2.5)
Average precipitation days (≥ 1 mm) 9 11 8 8 5 2 3 5 4 8 8 11

Monthly sunshine hours in Grahamstown, Eastern Cape, South Africa §

The sunniest months in Grahamstown are October, November and December, when the sun shines an average of 11 hours 53 minutes a day.Least sunny months in Grahamstown: April, May and June receive an average of 9 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grahamstown, Eastern 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 307 315 335 295 297 279 299 307 320 354 359 380
Mean daily daylight hours 14h 3m 13h 15m 12h 14m 11h 13m 10h 22m 9h 57m 10h 10m 10h 55m 11h 53m 12h 55m 13h 50m 14h 18m

Solar UV radiation in Grahamstown, Eastern Cape, South Africa §

Grahamstown experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure.May, June and July are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Grahamstown UV Index data.

Average daily maximum UV levels by month for Grahamstown, Eastern 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 14 12 8 5 4 4 6 9 11 13 14