October Weather in Fairfield, United States

Last updated: June 24, 2025

In October, the average temperature in Fairfield, United States hovers around 12°C (54°F). Expect a wide range of temperatures, with lows dipping to -5°C (24°F) and highs peaking at 32°C (89°F). This month also brings 124 mm (4.9 in) of precipitation over 11 days, while the average humidity rests at a comfortable 78%.

October Temperature in Fairfield

In October in Fairfield, the average temperature is 12°C (54°F). Maximum temperatures can reach 32°C (89°F), while minimums can drop as low as -5°C (24°F). Travelers should be prepared for a wide range of weather conditions, ensuring they pack both lightweight clothing for warmer days and warmer layers for cooler nights.

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

The chart illustrates October temperature patterns in Fairfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fairfield, October typically has an average temperature of 12°C (54°F), with highs reaching up to 32°C (89°F) and lows dropping to around -5°C (24°F).

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

October Precipitation in Fairfield

In Fairfield in October, the precipitation amount is 124 mm (4.9 in) over the course of 11 days.

October Precipitation Trends in Fairfield

The chart displays monthly precipitation patterns in Fairfield, 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 Fairfield, October typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 11 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 Fairfield

In Fairfield in October humidity is 78%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill settling in, making travel a bit uncomfortable as the air clings to your skin, leaving you feeling cooler than the thermometer suggests.

October Average Humidity in Fairfield

This chart illustrates the average monthly humidity levels in Fairfield, 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 Fairfield is approximately 78%, 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 Fairfield

In Fairfield 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 Fairfield, you can refer to this Hourly UV Index in Fairfield.

Maximum UV Index Levels in Fairfield for October

The chart shows the monthly maximum UV Index (UVI) for Fairfield 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 Fairfield typically reaches 6, which falls under the high exposure category.

Data source: Fairfield 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 Fairfield Compares to Other Months

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

This table compares monthly weather conditions in Fairfield, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	52 mm (2.0 inches)	81%	moderate
February Weather	-3°C (27°F)	55 mm (2.2 inches)	81%	moderate
March Weather	5°C (42°F)	91 mm (3.6 inches)	81%	high
April Weather	10°C (51°F)	83 mm (3.3 inches)	82%	very high
May Weather	18°C (64°F)	160 mm (6.3 inches)	78%	very high
June Weather	24°C (75°F)	133 mm (5.2 inches)	81%	extreme
July Weather	25°C (78°F)	70 mm (2.8 inches)	79%	very high
August Weather	24°C (75°F)	73 mm (2.9 inches)	77%	very high
September Weather	21°C (69°F)	121 mm (4.8 inches)	78%	very high
October Weather	12°C (54°F)	124 mm (4.9 inches)	78%	high
November Weather	4°C (40°F)	52 mm (2.0 inches)	87%	moderate
December Weather	0°C (33°F)	43 mm (1.7 inches)	84%	moderate