July Weather in Longwood, Saint Helena, Ascension and Tristan da Cunha

Last updated: August 31, 2025

In July, the average temperature in Longwood, Saint Helena, Ascension and Tristan da Cunha is a pleasant 21°C (69°F), with minimums dipping to 19°C (66°F) and maximums reaching 22°C (72°F). Expect a bit of precipitation, averaging 12 mm (0.5 in) over the course of 2 days, and enjoy the average humidity of 75% that gives this locale its lovely atmosphere.

July Temperature in Longwood

In July in Longwood, the average temperature is 21°C (69°F). The maximum can reach 22°C (72°F) while the minimum can dip as low as 19°C (66°F). This mild climate makes Longwood an ideal destination for travelers looking to enjoy comfortable weather.

July Weather in Longwood: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Longwood, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longwood, July typically has an average temperature of 21°C (69°F), with highs reaching up to 22°C (72°F) and lows dropping to around 19°C (66°F).

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

July Precipitation in Longwood

In Longwood in July, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.

July Precipitation Trends in Longwood

The chart displays monthly precipitation patterns in Longwood, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Longwood, July typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 2 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Longwood

In Longwood in July, humidity is 75%. With an average temperature of 21°C (69°F), this humidity feels like a warm, sticky embrace that can make even a short walk feel exhausting for travelers, often leading to a longing for refreshing breezes or air-conditioned retreats.

July Average Humidity in Longwood

This chart illustrates the average monthly humidity levels in Longwood, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Longwood is approximately 75%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Longwood

In Longwood in July, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Longwood.

Maximum UV Index Levels in Longwood for July

The chart shows the monthly maximum UV Index (UVI) for Longwood in July, 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 July, the maximum UV index in Longwood typically reaches 8, which falls under the very high exposure category.

Data source: Longwood July 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 July Weather in Longwood Compares to Other Months

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

This table compares monthly weather conditions in Longwood, showing how July’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