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October Weather in Fairfield, United States

Last updated: June 24, 2025

In October, the average temperature in Fairfield, United States hovers around 6°C (44°F), though temperatures can fluctuate dramatically—from a brisk -17°C (2°F) to a surprisingly warm 30°C (85°F). Expect about 33 mm (1.3 in) of precipitation over roughly 7 days, with an average humidity of 72% providing a damp chill to the air.

October Temperature in Fairfield

In October in Fairfield, the average temperature is 6°C (44°F). Maximum temperatures can reach 30°C (85°F), while minima can drop as low as -17°C (2°F). Be prepared for a wide range of weather conditions while traveling during this month.

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 6°C (44°F), with highs reaching up to 30°C (85°F) and lows dropping to around -17°C (2°F).
JanFebMarAprMayJunJulAugSepOctNovDec241932415362706858433528
Data source: Temperature data for Fairfield generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Fairfield

In Fairfield in October, the precipitation amount is 33 mm (1.3 in) over a period of 7 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 33 mm (1.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec13352554758092038332423
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Fairfield

In Fairfield in October, humidity is 72%. With an average temperature of 6°C (44°F), this humidity feels like a chilly, damp embrace that can make traveling uncomfortable if you're not dressed for the weather.

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 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%88%83%78%76%78%77%71%68%72%84%91%
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 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 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 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357910997532
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.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)13 mm (0.5 inches)87%low
February Weather-7°C (19°F)35 mm (1.4 inches)88%moderate
March Weather0°C (33°F)25 mm (1.0 inches)83%moderate
April Weather5°C (41°F)54 mm (2.1 inches)78%high
May Weather12°C (53°F)75 mm (2.9 inches)76%very high
June Weather17°C (63°F)80 mm (3.1 inches)78%very high
July Weather21°C (71°F)9 mm (0.4 inches)77%very high
August Weather20°C (68°F)20 mm (0.8 inches)71%very high
September Weather14°C (58°F)38 mm (1.5 inches)68%high
October Weather6°C (44°F)33 mm (1.3 inches)72%moderate
November Weather2°C (36°F)24 mm (0.9 inches)84%moderate
December Weather-2°C (28°F)23 mm (0.9 inches)90%low

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