March Weather in Jamestown, Saint Helena, Ascension and Tristan da Cunha

Last updated: August 31, 2025

In March, the average temperature in Jamestown, Saint Helena, Ascension and Tristan da Cunha is a pleasant 24°C (76°F). Expect minimum lows of 22°C (72°F) and highs reaching 25°C (78°F). During this time, anticipate 16 mm (0.6 in) of precipitation over approximately 3 days, coupled with an average humidity of around 82%.

March Temperature in Jamestown

In March in Jamestown, the average temperature is 24°C (76°F). Maximums can reach 25°C (78°F), and minimums can drop to as low as 22°C (72°F). This mild weather makes it an ideal destination for travelers seeking a comfortable climate.

March Weather in Jamestown: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Jamestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jamestown, March typically has an average temperature of 24°C (76°F), with highs reaching up to 25°C (78°F) and lows dropping to around 22°C (72°F).

Data source: Temperature data for Jamestown generated using information from the Copernicus Climate Change Service.

March Precipitation in Jamestown

In Jamestown in March, the precipitation amount is 16 mm (0.6 in), spread over a duration of 3 days.

March Precipitation Trends in Jamestown

The chart displays monthly precipitation patterns in Jamestown, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Jamestown, March typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 3 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Jamestown

In Jamestown in March, humidity is 82%. With an average temperature of 24°C (76°F), this humidity feels like wearing a warm, damp blanket, making travel uncomfortable and sticky as you explore.

March Average Humidity in Jamestown

This chart illustrates the average monthly humidity levels in Jamestown, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Jamestown is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Jamestown

In Jamestown in March, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Jamestown.

Maximum UV Index Levels in Jamestown for March

The chart shows the monthly maximum UV Index (UVI) for Jamestown in March, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In March, the maximum UV index in Jamestown typically reaches 13, which falls under the extreme exposure category.

Data source: Jamestown March UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How March Weather in Jamestown Compares to Other Months

Weather in Jamestown varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Jamestown, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Jamestown, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (73°F)	10 mm (0.4 inches)	79%	extreme
February Weather	24°C (75°F)	12 mm (0.5 inches)	81%	extreme
March Weather	24°C (76°F)	16 mm (0.6 inches)	82%	extreme
April Weather	24°C (75°F)	14 mm (0.6 inches)	81%	extreme
May Weather	23°C (73°F)	12 mm (0.5 inches)	78%	very high
June Weather	22°C (71°F)	14 mm (0.5 inches)	74%	very high
July Weather	21°C (69°F)	12 mm (0.5 inches)	75%	very high
August Weather	20°C (68°F)	14 mm (0.6 inches)	76%	very high
September Weather	20°C (67°F)	13 mm (0.5 inches)	78%	extreme
October Weather	19°C (67°F)	11 mm (0.4 inches)	80%	extreme
November Weather	20°C (68°F)	10 mm (0.4 inches)	81%	extreme
December Weather	21°C (70°F)	10 mm (0.4 inches)	80%	extreme