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

Last updated: August 31, 2025

In January, the average temperature in Longwood, Saint Helena, Ascension and Tristan da Cunha is a pleasant 23°C (73°F). Expect comfortable conditions, with minimum temperatures dipping to 21°C (70°F) and a maximum reaching 25°C (77°F). Rainfall is minimal, with just 10 mm (0.4 in) expected over 0 days. The humidity is relatively high at 79%, making for a refreshing atmosphere.

January Temperature in Longwood

In January in Longwood, the average temperature is 23°C (73°F). Maximums can reach 25°C (77°F), while minimums can drop to 21°C (70°F). This pleasant climate makes Longwood an ideal destination for travelers seeking mild weather and enjoyable outdoor activities.

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

The chart illustrates January 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, January typically has an average temperature of 23°C (73°F), with highs reaching up to 25°C (77°F) and lows dropping to around 21°C (70°F).

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

January Precipitation in Longwood

In Longwood in January, the precipitation amount is 10 mm (0.4 in) during a total of 0 days.

January Precipitation Trends in Longwood

The chart displays monthly precipitation patterns in Longwood, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Longwood, January typically receives around 10 mm (0.4 inches) of precipitation spread over approximately 0 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Longwood

In Longwood in January humidity is 79%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace that clings to the skin, making travel feel both invigorating and slightly exhausting as the air wraps around you like a damp blanket.

January Average Humidity in Longwood

This chart illustrates the average monthly humidity levels in Longwood, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Longwood is approximately 79%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Longwood

In Longwood in January, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Longwood.

Maximum UV Index Levels in Longwood for January

The chart shows the monthly maximum UV Index (UVI) for Longwood in January, 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 January, the maximum UV index in Longwood typically reaches 15, which falls under the extreme exposure category.

Data source: Longwood January 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 January 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 January’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 January’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