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October Weather in Fairfield, United States

Last updated: June 24, 2025

In Fairfield, United States, the average temperature in October hovers around 21°C (70°F), creating a pleasant atmosphere. Temperatures can range widely, with minimums dipping to 2°C (37°F) and maximums soaring up to 36°C (97°F). Expect around 117 mm (4.6 in) of precipitation spread over 9 days, contributing to an average humidity of 73%.

October Temperature in Fairfield

In October in Fairfield, the average temperature is 21°C (70°F), with maximums reaching 36°C (97°F) and minimums dropping as low as 2°C (37°F). Be sure to pack a variety of clothing to enjoy the warm days and cooler nights during your visit.

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 21°C (70°F), with highs reaching up to 36°C (97°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec505262667582868681705954
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 total precipitation amount is 117 mm (4.6 in) spread over a period of 9 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 117 mm (4.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec841131051171718266861001176992
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 73%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace that can make outdoor activities feel sweltering, so it's essential to stay hydrated and take breaks in the shade while exploring.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%87%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478111111121110864
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 Weather10°C (50°F)84 mm (3.3 inches)79%moderate
February Weather11°C (52°F)113 mm (4.5 inches)80%high
March Weather17°C (62°F)105 mm (4.1 inches)78%very high
April Weather19°C (67°F)117 mm (4.6 inches)79%extreme
May Weather24°C (75°F)171 mm (6.7 inches)81%extreme
June Weather28°C (82°F)82 mm (3.2 inches)77%extreme
July Weather30°C (86°F)65 mm (2.6 inches)71%extreme
August Weather30°C (86°F)86 mm (3.4 inches)67%extreme
September Weather27°C (81°F)100 mm (4.0 inches)69%very high
October Weather21°C (70°F)117 mm (4.6 inches)73%very high
November Weather15°C (59°F)69 mm (2.7 inches)82%high
December Weather12°C (54°F)92 mm (3.6 inches)87%moderate

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