January Weather in St Helena, Australia

Last updated: August 22, 2025

In St Helena, Australia, the average temperature in January is a comfortable 21°C (70°F). However, temperatures can vary significantly, with a minimum of 9°C (49°F) and soaring up to a maximum of 43°C (110°F). Expect about 42 mm (1.6 in) of precipitation over 5 days, contributing to an average humidity of 43%. Embrace the diverse climate and prepare for both warmth and occasional showers!

January Temperature in St Helena

In January in St Helena, the average temperature is 21°C (70°F). Maximums can reach 43°C (110°F), while minimums can drop as low as 9°C (49°F). Therefore, when traveling to St Helena during this month, it's essential to pack both light clothing for the heat and warmer layers for the cooler evenings.

January Weather in St Helena: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in St Helena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St Helena, January typically has an average temperature of 21°C (70°F), with highs reaching up to 43°C (110°F) and lows dropping to around 9°C (49°F).

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

January Precipitation in St Helena

In St Helena in January, the precipitation amount is 42 mm (1.6 in) over a period of 5 days.

January Precipitation Trends in St Helena

The chart displays monthly precipitation patterns in St Helena, 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 St Helena, January typically receives around 42 mm (1.6 inches) of precipitation spread over approximately 5 days.

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

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Millimeters (mm) Inches (in)

January Humidity in St Helena

In St Helena in January humidity is 43%. With an average temperature of 21°C (70°F), this humidity feels like a comfortable balance, making it pleasant for traveling as you can explore the surroundings without the discomfort of excessive moisture in the air.

January Average Humidity in St Helena

This chart illustrates the average monthly humidity levels in St Helena, 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 St Helena is approximately 43%, 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 St Helena

In St Helena in January, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in St Helena, you can check here.

Maximum UV Index Levels in St Helena for January

The chart shows the monthly maximum UV Index (UVI) for St Helena 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 St Helena typically reaches 14, which falls under the extreme exposure category.

Data source: St Helena 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 St Helena Compares to Other Months

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

This table compares monthly weather conditions in St Helena, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	42 mm (1.6 inches)	43%	extreme
February Weather	19°C (67°F)	44 mm (1.7 inches)	49%	extreme
March Weather	19°C (66°F)	40 mm (1.6 inches)	60%	extreme
April Weather	15°C (60°F)	51 mm (2.0 inches)	71%	high
May Weather	12°C (54°F)	57 mm (2.2 inches)	79%	moderate
June Weather	10°C (50°F)	54 mm (2.1 inches)	81%	moderate
July Weather	10°C (49°F)	46 mm (1.8 inches)	83%	moderate
August Weather	10°C (50°F)	58 mm (2.3 inches)	79%	moderate
September Weather	12°C (54°F)	64 mm (2.5 inches)	72%	high
October Weather	14°C (58°F)	74 mm (2.9 inches)	61%	very high
November Weather	17°C (62°F)	58 mm (2.3 inches)	59%	extreme
December Weather	18°C (65°F)	74 mm (2.9 inches)	50%	extreme