Jamestown
Saint Helena, Ascension and Tristan da Cunha
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Jamestown, Saint Helena, Ascension and Tristan da Cunha

The valley town of Jamestown in Saint Helena, with a view of mountain slopes on both sides
The valley town of Jamestown in Saint Helena, with a view of mountain slopes on both sides
January, the same as December, is another warm summer month in Jamestown, Saint Helena, Ascension and Tristan da Cunha, with average temperature ranging between min 21°C (69.8°F) and max 27°C (80.6°F). In Jamestown, the average high-temperature marginally rises, from a warm 24°C (75.2°F) in December, to a still moderately hot 27°C (80.6°F). Weather in January »
February, the last month of the summer, in Jamestown, is also a moderately hot month, with average temperature fluctuating between 27°C (80.6°F) and 21°C (69.8°F). In Jamestown, the average high-temperature remains the same as in January - a still moderately hot 27°C (80.6°F). Weather in February »

March, the first month of the autumn, in Jamestown, is still a warm month, with temperature in the range of an average low of 22°C (71.6°F) and an average high of 28°C (82.4°F). March is the warmest month, with an average high-temperature of 28°C (82.4°F) and an average low-temperature of 22°C (71.6°F). Weather in March »

April, like March, in Jamestown, Saint Helena, Ascension and Tristan da Cunha, is a moderately hot autumn month, with average temperature ranging between min 21°C (69.8°F) and max 27°C (80.6°F). In April, the average high-temperature is essentially the same as in March - a still warm 27°C (80.6°F). Weather in April »

May, the last month of the autumn, in Jamestown, is another warm month, with average temperature ranging between min 19°C (66.2°F) and max 24°C (75.2°F). In May, the average high-temperature slightly decreases, from a moderately hot 27°C (80.6°F) in April, to a still warm 24°C (75.2°F). Weather in May »

June, the first month of the winter, in Jamestown, is still a warm month, with average temperature ranging between min 18°C (64.4°F) and max 23°C (73.4°F). In Jamestown, the average high-temperature is relatively the same as in May - a still warm 23°C (73.4°F). Weather in June »

July, like June, is another pleasant winter month in Jamestown, Saint Helena, Ascension and Tristan da Cunha, with average temperature varying between 17°C (62.6°F) and 22°C (71.6°F). The coldest months are July through September, with an average high-temperature of 22°C (71.6°F). Weather in July »

August, the last month of the winter, in Jamestown, is also an agreeable month, with temperature in the range of an average low of 17°C (62.6°F) and an average high of 22°C (71.6°F). July through September, with an average high-temperature of 22°C (71.6°F), are the coldest months. Weather in August »

September, the first month of the spring, in Jamestown, is also an agreeable month, with average temperature fluctuating between 17°C (62.6°F) and 22°C (71.6°F). July through September, with an average high-temperature of 22°C (71.6°F), are the coldest months. Weather in September »

October is a warm spring month in Jamestown, Saint Helena, Ascension and Tristan da Cunha, with average temperature ranging between min 18°C (64.4°F) and max 23°C (73.4°F). In October, the average high-temperature is practically the same as in September - a warm 23°C (73.4°F). Weather in October »

The last month of the spring, November, is also a moderately hot month in Jamestown, Saint Helena, Ascension and Tristan da Cunha, with average temperature fluctuating between 18°C (64.4°F) and 23°C (73.4°F). In Jamestown, the average high-temperature remains equal as in October - a still warm 23°C (73.4°F). Weather in November »

December, the first month of the summer, in Jamestown, is still a warm month, with average temperature fluctuating between 19°C (66.2°F) and 24°C (75.2°F). In December, the average high-temperature is almost the same as in November - a still warm 24°C (75.2°F). Weather in December »

How many days does it rain in Jamestown?

In Jamestown, Saint Helena, Ascension and Tristan da Cunha, during the entire year, the rain falls for 40.7 days and collects up to 113mm (4.4") of precipitation.

What is the warmest month in Jamestown?

With an average high-temperature of 28°C (82.4°F) and an average low-temperature of 22°C (71.6°F), March is the warmest month in Jamestown, Saint Helena, Ascension and Tristan da Cunha.

What is the rainiest month in Jamestown?

The month with the most rainfall in Jamestown is March when the rain falls for 5 days and typically aggregates up to 20mm (0.8") of precipitation.

What is the month with the shortest days in Jamestown?

The month with the shortest days in Jamestown, Saint Helena, Ascension and Tristan da Cunha, is June, with an average of 11.2h of daylight.

What is the coldest month in Jamestown?

July through September, with an average high-temperature of 22°C (71.6°F), are the coldest months in Jamestown, Saint Helena, Ascension and Tristan da Cunha.

What is the driest month in Jamestown?

The only month without rainfall is November.

When does it rain in Jamestown?

Months with rainfall in Jamestown, Saint Helena, Ascension and Tristan da Cunha, are January through October and December.

When are the longest days in Jamestown?

The month with the longest days in Jamestown is December, with an average of 13.1h of daylight.
Average temperature - Jamestown, Saint Helena, Ascension and Tristan da Cunha
Average rainfall - Jamestown, Saint Helena, Ascension and Tristan da Cunha
Average rainfall days - Jamestown, Saint Helena, Ascension and Tristan da Cunha
Average daylight - Jamestown, Saint Helena, Ascension and Tristan da Cunha

The month with the longest days is December (Average daylight: 13.1h).
The month with shortest days is June (Average daylight: 11.2h).