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Monthly climate in Hermanus, Western Cape, South Africa

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Hermanus features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 13 °C (56 °F) and 20 °C (69 °F) through the year, but rarely can drop to 7 °C (45 °F) or can rise to as high as 30 °C (86 °F).The average annual precipitation amounts to about 574 mm (22.6 inches) and receives 88 rainy days on the 1 mm (0.04 inches) threshold annually.Hermanus enjoys an average of 4020 hours of sunshine throughout the year, and daylight varies from 9 hours 52 minutes to 14 hours 24 minutes per day.

Monthly average temperatures in Hermanus, Western Cape, South Africa §

The warmest months in Hermanus are January, February and March, with daily mean temperatures ranging from 19 to 20 °C (67 - 69 °F) throughout the day. The coldest temperatures usually occur in July, August and September, when daily mean temperatures range from 13 to 15 °C (56 - 59 °F) throughout the day. On average each year, Hermanus experiences 9 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 Hermanus, Western 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 29°C
(84°F)		 29°C
(84°F)		 27°C
(81°F)		 30°C
(86°F)		 28°C
(83°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(73°F)		 28°C
(83°F)		 28°C
(83°F)		 25°C
(78°F)		 27°C
(82°F)
Mean maximum 27°C
(80°F)		 27°C
(80°F)		 26°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 21°C
(71°F)		 21°C
(70°F)		 21°C
(70°F)		 22°C
(72°F)		 24°C
(75°F)		 24°C
(75°F)		 25°C
(78°F)
Average high 22°C
(72°F)		 23°C
(73°F)		 21°C
(71°F)		 20°C
(68°F)		 18°C
(66°F)		 17°C
(63°F)		 16°C
(62°F)		 16°C
(60°F)		 17°C
(63°F)		 18°C
(65°F)		 19°C
(67°F)		 21°C
(70°F)
Daily mean 20°C
(69°F)		 20°C
(69°F)		 19°C
(67°F)		 17°C
(64°F)		 16°C
(61°F)		 15°C
(59°F)		 14°C
(57°F)		 13°C
(56°F)		 15°C
(59°F)		 16°C
(61°F)		 17°C
(63°F)		 19°C
(66°F)
Average low 18°C
(65°F)		 19°C
(66°F)		 17°C
(64°F)		 16°C
(60°F)		 14°C
(58°F)		 13°C
(55°F)		 12°C
(54°F)		 11°C
(53°F)		 13°C
(55°F)		 14°C
(58°F)		 15°C
(60°F)		 17°C
(63°F)
Mean minimum 16°C
(61°F)		 16°C
(62°F)		 15°C
(59°F)		 13°C
(56°F)		 12°C
(54°F)		 11°C
(51°F)		 9°C
(49°F)		 8°C
(48°F)		 10°C
(51°F)		 11°C
(53°F)		 12°C
(54°F)		 15°C
(59°F)
Minimum 15°C
(60°F)		 16°C
(60°F)		 14°C
(58°F)		 12°C
(54°F)		 11°C
(53°F)		 9°C
(49°F)		 9°C
(48°F)		 7°C
(45°F)		 9°C
(48°F)		 11°C
(52°F)		 11°C
(52°F)		 14°C
(57°F)

Compare climate in Hermanus with other places

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

Monthly average precipitation in Hermanus, Western Cape, South Africa §

Hermanus usually has the most precipitation in June, July and August, with an average of 10 rainy days and 80 mm (3.2 inches) of precipitation per month.The driest months in Hermanus are January, February and April. On average, 22 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hermanus, Western 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) 23 (0.9) 17 (0.7) 31 (1.2) 25 (1.0) 75 (2.9) 84 (3.3) 80 (3.1) 77 (3.0) 46 (1.8) 48 (1.9) 41 (1.6) 28 (1.1)
Average precipitation days (≥ 1 mm) 5 5 6 6 6 10 9 11 8 8 7 7

Monthly sunshine hours in Hermanus, Western Cape, South Africa §

The sunniest months in Hermanus are October, November and December, when the sun shines an average of 12 hours 51 minutes a day.Least sunny months in Hermanus: May, June and July receive an average of 9 hours 11 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hermanus, Western 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 336 355 351 311 291 267 287 308 327 371 390 420
Mean daily daylight hours 14h 8m 13h 18m 12h 15m 11h 11m 10h 18m 9h 52m 10h 5m 10h 52m 11h 53m 12h 57m 13h 54m 14h 24m

Solar UV radiation in Hermanus, Western Cape, South Africa §

Hermanus experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 13 - 14, 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 Hermanus UV Index data.

Average daily maximum UV levels by month for Hermanus, Western 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) 14 13 11 8 5 3 4 6 9 11 12 14