October Weather in Chelsea, United States

Last updated: June 24, 2025

In Chelsea, United States, the average temperature in October hovers around 9°C (48°F). While the mercury can dip as low as -5°C (23°F), it can also rise to a pleasant 24°C (76°F). Expect approximately 141 mm (5.6 in) of precipitation spread over about 13 days during this month, accompanied by an average humidity level of 81%.

October Temperature in Chelsea

In October in Chelsea, the average temperature is 9°C (48°F). The maximum can reach 24°C (76°F), while the minimum can be as low as -5°C (23°F). Pack for varied weather conditions if you're planning to travel during this month.

October Weather in Chelsea: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Chelsea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chelsea, October typically has an average temperature of 9°C (48°F), with highs reaching up to 24°C (76°F) and lows dropping to around -5°C (23°F).

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

October Precipitation in Chelsea

In Chelsea in October, the precipitation amount is 141 mm (5.6 in) spread over 13 days.

October Precipitation Trends in Chelsea

The chart displays monthly precipitation patterns in Chelsea, 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 Chelsea, October typically receives around 141 mm (5.6 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Chelsea

In Chelsea in October, humidity is 81%. With an average temperature of 9°C (48°F), this humidity feels like a chilly, damp embrace that can make outdoor activities less enjoyable and may require extra layers to stay comfortable while traveling.

October Average Humidity in Chelsea

This chart illustrates the average monthly humidity levels in Chelsea, 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 Chelsea is approximately 81%, 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 Chelsea

In Chelsea in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Chelsea.

Maximum UV Index Levels in Chelsea for October

The chart shows the monthly maximum UV Index (UVI) for Chelsea 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 Chelsea typically reaches 5, which falls under the moderate exposure category.

Data source: Chelsea 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 Chelsea Compares to Other Months

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

This table compares monthly weather conditions in Chelsea, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (19°F)	77 mm (3.0 inches)	89%	low
February Weather	-6°C (22°F)	80 mm (3.2 inches)	88%	moderate
March Weather	-2°C (29°F)	71 mm (2.8 inches)	86%	moderate
April Weather	5°C (42°F)	117 mm (4.6 inches)	84%	very high
May Weather	12°C (55°F)	96 mm (3.8 inches)	76%	very high
June Weather	17°C (64°F)	97 mm (3.8 inches)	72%	very high
July Weather	20°C (69°F)	140 mm (5.5 inches)	66%	very high
August Weather	19°C (67°F)	98 mm (3.9 inches)	64%	very high
September Weather	15°C (60°F)	71 mm (2.8 inches)	72%	high
October Weather	9°C (48°F)	141 mm (5.6 inches)	81%	moderate
November Weather	1°C (33°F)	104 mm (4.1 inches)	87%	moderate
December Weather	-5°C (24°F)	88 mm (3.4 inches)	84%	low