nomadseason

Monthly climate in Georgetown, Saint Helena, Ascension and Tristan da Cunha

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Georgetown features a tropical monsoon climate (Am).Temperatures typically range between 24 °C (75 °F) and 27 °C (81 °F) through the year, but rarely can drop to 22 °C (72 °F) or can rise to as high as 28 °C (83 °F).The average annual precipitation amounts to about 183 mm (7.2 inches) and receives 38 rainy days on the 1 mm (0.04 inches) threshold annually.Georgetown enjoys an average of 3707 hours of sunshine throughout the year, and daylight varies from 11 hours 39 minutes to 12 hours 33 minutes per day.

Monthly average temperatures in Georgetown, Saint Helena, Ascension and Tristan da Cunha §

The warmest months in Georgetown are March, April and May, with daily mean temperatures ranging from 26 to 27 °C (80 - 81 °F) throughout the day. The coldest temperatures usually occur in August, September and October, when daily mean temperatures range from 24 to 24 °C (75 - 75 °F) throughout the day. On average each year, Georgetown experiences 191 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 Georgetown, Saint Helena, Ascension and Tristan da Cunha.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 27°C
(81°F)		 27°C
(82°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(82°F)		 27°C
(81°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(77°F)		 25°C
(77°F)		 26°C
(78°F)		 26°C
(79°F)
Mean maximum 26°C
(79°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(82°F)		 27°C
(80°F)		 26°C
(79°F)		 25°C
(77°F)		 24°C
(76°F)		 25°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)
Average high 25°C
(78°F)		 26°C
(80°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 26°C
(79°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(76°F)		 25°C
(77°F)
Daily mean 25°C
(77°F)		 26°C
(79°F)		 27°C
(80°F)		 27°C
(81°F)		 26°C
(80°F)		 26°C
(78°F)		 25°C
(77°F)		 24°C
(75°F)		 24°C
(75°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(76°F)
Average low 25°C
(77°F)		 26°C
(78°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(79°F)		 25°C
(77°F)		 24°C
(76°F)		 23°C
(75°F)		 23°C
(74°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(76°F)
Mean minimum 24°C
(75°F)		 25°C
(77°F)		 25°C
(78°F)		 26°C
(78°F)		 25°C
(77°F)		 24°C
(76°F)		 23°C
(74°F)		 23°C
(73°F)		 23°C
(73°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)
Minimum 23°C
(74°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)		 23°C
(74°F)		 22°C
(73°F)		 22°C
(73°F)		 22°C
(72°F)		 23°C
(73°F)		 23°C
(74°F)

Compare climate in Georgetown with other places

Compare temperature, precipitation, sunshine, UV index in Georgetown, Saint Helena, Ascension and Tristan da Cunha with other places around the world.

Monthly average precipitation in Georgetown, Saint Helena, Ascension and Tristan da Cunha §

Georgetown usually has the most precipitation in April, August and September, with an average of 5 rainy days and 20 mm (0.8 inches) of precipitation per month.The driest months in Georgetown are January, November and December. On average, 11 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Georgetown, Saint Helena, Ascension and Tristan da Cunha.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) 9 (0.3) 15 (0.6) 16 (0.6) 21 (0.8) 14 (0.6) 14 (0.6) 17 (0.7) 19 (0.8) 19 (0.7) 15 (0.6) 11 (0.4) 12 (0.5)
Average precipitation days (≥ 1 mm) 1 3 5 7 4 4 4 5 3 1 0 1

Monthly sunshine hours in Georgetown, Saint Helena, Ascension and Tristan da Cunha §

The sunniest months in Georgetown are March, April and May, when the sun shines an average of 10 hours 43 minutes a day.Least sunny months in Georgetown: January, July and September receive an average of 9 hours 25 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Georgetown, Saint Helena, Ascension and Tristan da Cunha.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 282 306 339 322 323 302 301 312 282 303 309 319
Mean daily daylight hours 12h 30m 12h 20m 12h 7m 11h 54m 11h 44m 11h 39m 11h 41m 11h 50m 12h 2m 12h 16m 12h 27m 12h 33m

Solar UV radiation in Georgetown, Saint Helena, Ascension and Tristan da Cunha §

Georgetown experiences the highest level of ultraviolet (UV) radiation in March, November and December, when the maximum UV index can reach values of 14 - 14, which corresponds to the Extreme category of sun exposure.June, July and August are in the Very High / Extreme exposure category. In these months, the maximum values of the UV index do not exceed 11. For more detailed information, check out our hourly Georgetown UV Index data.

Average daily maximum UV levels by month for Georgetown, Saint Helena, Ascension and Tristan da Cunha.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 14 14 13 12 10 10 11 12 13 14 14