nomadseason

October Weather in Chelsea, United States

Last updated: June 24, 2025

In Chelsea, United States, the average temperature in October is a mild 12°C (54°F). However, temperatures can vary significantly, with a minimum of -4°C (26°F) and a maximum of 29°C (85°F). During this month, expect an average precipitation of 104 mm (4.1 in) spread over 13 days, contributing to a relatively high average humidity of 84%. Stay prepared for a mix of weather conditions!

October Temperature in Chelsea

In October in Chelsea, the average temperature is 12°C (54°F), with maximums reaching 29°C (85°F) and minimums dropping as low as -4°C (26°F). Travelers should be prepared for a wide range of temperatures during this time.

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 12°C (54°F), with highs reaching up to 29°C (85°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec262837476070747266543932
Data source: Temperature data for Chelsea generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Chelsea

In Chelsea in October, the precipitation amount is 104 mm (4.1 in) over the course of 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 104 mm (4.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec64677791120829565691047653
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

October Humidity in Chelsea

In Chelsea in October, humidity is 84%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sticky.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec24599101097542
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.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)64 mm (2.5 inches)88%low
February Weather-2°C (28°F)67 mm (2.6 inches)87%moderate
March Weather3°C (37°F)77 mm (3.0 inches)85%moderate
April Weather8°C (47°F)90 mm (3.6 inches)86%very high
May Weather15°C (60°F)120 mm (4.7 inches)80%very high
June Weather21°C (70°F)82 mm (3.2 inches)80%very high
July Weather24°C (75°F)95 mm (3.8 inches)80%very high
August Weather22°C (72°F)65 mm (2.5 inches)80%very high
September Weather19°C (66°F)69 mm (2.7 inches)80%high
October Weather12°C (54°F)104 mm (4.1 inches)84%moderate
November Weather4°C (39°F)76 mm (3.0 inches)89%moderate
December Weather0°C (33°F)53 mm (2.1 inches)86%low

Compare Chelsea's Climate with Cities Worldwide