October Weather in Saint Helena, United States

Last updated: June 24, 2025

In Saint Helena, United States, the average temperature in October is a pleasant 18°C (64°F). However, be prepared for temperature fluctuations, as it can dip to a cool 4°C (40°F) at its lowest and soar up to a warm 37°C (99°F) at its peak. Expect a modest precipitation amount of 38 mm (1.5 in) over the course of 2 days, while the average humidity hovers around a comfortable 72%. Enjoy the diverse climate of this vibrant destination!

October Temperature in Saint Helena

In October in Saint Helena, the average temperature is 18°C (64°F), with maximums reaching up to 37°C (99°F) and minimums dipping as low as 4°C (40°F). It's advisable to pack layers to accommodate the warm days and cooler nights while enjoying your travels.

October Weather in Saint Helena: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Saint Helena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Helena, October typically has an average temperature of 18°C (64°F), with highs reaching up to 37°C (99°F) and lows dropping to around 4°C (40°F).

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

October Precipitation in Saint Helena

In Saint Helena in October, the total precipitation amount is 38 mm (1.5 in) over a span of 2 days.

October Precipitation Trends in Saint Helena

The chart displays monthly precipitation patterns in Saint Helena, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Saint Helena, October typically receives around 38 mm (1.5 inches) of precipitation spread over approximately 2 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Saint Helena

In Saint Helena in October, humidity is 72%. With an average temperature of 18°C (64°F), this humidity feels like a warm, sticky embrace, making travel somewhat uncomfortable as the air clings to your skin, leaving you longing for a refreshing breeze.

October Average Humidity in Saint Helena

This chart illustrates the average monthly humidity levels in Saint Helena, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Saint Helena is approximately 72%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Saint Helena

In Saint Helena in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Saint Helena, you can refer to this Hourly UV Index in Saint Helena.

Maximum UV Index Levels in Saint Helena for October

The chart shows the monthly maximum UV Index (UVI) for Saint Helena in October, 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 October, the maximum UV index in Saint Helena typically reaches 6, which falls under the high exposure category.

Data source: Saint Helena October 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 October Weather in Saint Helena Compares to Other Months

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

This table compares monthly weather conditions in Saint Helena, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	137 mm (5.4 inches)	86%	moderate
February Weather	10°C (51°F)	141 mm (5.6 inches)	84%	moderate
March Weather	11°C (53°F)	92 mm (3.6 inches)	83%	high
April Weather	15°C (59°F)	39 mm (1.5 inches)	80%	very high
May Weather	18°C (64°F)	23 mm (0.9 inches)	80%	very high
June Weather	22°C (72°F)	2 mm (0.1 inches)	76%	extreme
July Weather	23°C (74°F)	0 mm (0.0 inches)	70%	extreme
August Weather	23°C (73°F)	0 mm (0.0 inches)	66%	very high
September Weather	21°C (71°F)	2 mm (0.1 inches)	68%	very high
October Weather	18°C (64°F)	38 mm (1.5 inches)	72%	high
November Weather	12°C (55°F)	51 mm (2.0 inches)	84%	moderate
December Weather	9°C (49°F)	95 mm (3.7 inches)	84%	moderate