Jamestown Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Jamestown.
Climate overview of Jamestown
Jamestown, Saint Helena, enjoys a steady climate throughout the year, with daytime temperatures typically around 23°C (73°F). March is the warmest month at 26°C (79°F), while September is the coolest at 21°C (70°F).
The area sees almost no rainfall, totalling just 154 mm (6.1 in) per year.
Jamestown Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Jamestown - and find the best time to visit.
Monthly Temperature in Jamestown
The temperature in Jamestown remains steady throughout the year, providing a consistently comfortable climate. Typically, average maximum daytime temperatures range from a comfortable 26°C (79°F) in March to a pleasant 21°C (70°F) in the coolest month, September.
Nights vary from 24°C (75°F) in March to around 19°C (66°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Jamestown
Jamestown has a dry climate with very low precipitation, averaging 154 mm (6.1 in) of rainfall annually. Jamestown offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month March (17 mm (0.7 in)) and the driest month November (9.4 mm (0.4 in)) is not too significant. For more details, please visit our Jamestown Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Humidity in Jamestown by Month
The relative humidity is high throughout the year in Jamestown.
The city experiences its highest humidity in August, reaching 76%. In January, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Jamestown
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Warmest weather: February, March, April and May
- Fewest rainy days: January, February, November and December
- Seasonal pattern: Very little rainfall year-round
Frequently asked questions about the climate in Jamestown
What is the best time to visit Jamestown?
Jamestown has very little rainfall year-round.
What temperatures can I expect in Jamestown?
Daytime highs range from 21°C (70°F) in September to 26°C (79°F) in March. Nighttime lows range from 19°C (66°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does Jamestown get?
Annual rainfall is around 154 mm (6.1 in). March is the wettest month with 17 mm (0.7 in), while November is the driest with 9.4 mm (0.4 in).
Jamestown 3-Day Forecast
Jamestown on the map
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