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May Weather in Fairfield, United States

Last updated: June 24, 2025

In May, the average temperature in Fairfield, United States hovers around 24°C (75°F). Expect a comfortable range, with minimums dipping to 8°C (47°F) and maximums soaring to 37°C (99°F). Be prepared for moderate precipitation, averaging 171 mm (6.7 in) over 14 days, and enjoy the distinctly warm atmosphere with an average humidity of 81%.

May Temperature in Fairfield

In May in Fairfield, the average temperature is 24°C (75°F). Maximums can reach 37°C (99°F), and minimums can be as low as 8°C (47°F). This makes Fairfield an ideal destination for travelers seeking a warm getaway with some cooler evenings for comfort.

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

The chart illustrates May 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, May typically has an average temperature of 24°C (75°F), with highs reaching up to 37°C (99°F) and lows dropping to around 8°C (47°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.

May Precipitation in Fairfield

In Fairfield in May, the precipitation amount is 171 mm (6.7 in) over the course of 14 days.

May Precipitation Trends in Fairfield

The chart displays monthly precipitation patterns in Fairfield, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Fairfield, May typically receives around 171 mm (6.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec841131051171718266861001176992
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Fairfield

In Fairfield in May humidity is 81%. With an average temperature of 24°C (75°F), this humidity feels like a warm, thick blanket enveloping you, making traveling a bit sticky and sweaty, yet still inviting for those who enjoy the rich, tropical atmosphere.

May Average Humidity in Fairfield

This chart illustrates the average monthly humidity levels in Fairfield, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Fairfield is approximately 81%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Fairfield

In Fairfield in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Fairfield.

Maximum UV Index Levels in Fairfield for May

The chart shows the monthly maximum UV Index (UVI) for Fairfield in May, 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 May, the maximum UV index in Fairfield typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478111111121110864
Data source: Fairfield May 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 May 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 May’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 May’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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