Saint Helena climate
World Climates covers 1 place in Saint Helena. Jamestown has a hot desert climate (Köppen BWh).
Climate of Jamestown at a glance
The year average in Jamestown is 22 °C71 °F. The warmest month is March, with an average high of 25 °C77 °F. The coldest is September, with an average low of 19 °C67 °F. About 58 mm2.3 in of precipitation falls in a year. June is the wettest month and January the driest. By our comfort score, the best months to visit are all year.
Frequently asked questions
How many places in Saint Helena does this site cover?
World Climates has climate data for one place in Saint Helena: Jamestown. Its page has monthly averages for temperature, rainfall, humidity and daylight.
What is the warmest month in Jamestown?
March is the warmest month, with an average high of 25 °C77 °F. September is the coldest, with an average low of 19 °C67 °F.
When does it rain the most in Jamestown?
June is the wettest month, with about 8 mm0.3 in of precipitation. The yearly total is about 58 mm2.3 in.
When is the best time to visit Jamestown?
By our comfort score, the most comfortable months are all year. The score is based on long-term averages, not on a forecast.
Climate of every place in Saint Helena
| Place | Year | Max high | Min low | Precip. |
|---|---|---|---|---|
| Jamestown | 22 | 25 | 19 | 58 |
Year = annual mean temperature; max high = average high of the warmest month; min low = average low of the coldest month; precip. = annual total. Temperatures in °C°F, precipitation in mminches. Sorted by population.
Data: NASA POWER climatology 2001–2025 (MERRA-2 reanalysis, CERES satellite data) — grid-cell averages, not station records. Sources and method.