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August Weather in Fairfield, United States

Last updated: June 24, 2025

In August, the average temperature in Fairfield, United States hovers around 22°C (71°F), providing a pleasant climate for outdoor activities. However, be prepared for a temperature range that can dip to a chilly 4°C (40°F) or soar to a sizzling 37°C (99°F). Rain is modest, with an average precipitation of 15 mm (0.6 in) spread over 3 days, while the average humidity sits at a comfortable 42%. Enjoy the diverse weather this month brings!

August Temperature in Fairfield

In August in Fairfield, the average temperature is 22°C (71°F). Maximums can reach 37°C (99°F), and minimums can drop as low as 4°C (40°F). This diverse temperature range makes Fairfield an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates August 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, August typically has an average temperature of 22°C (71°F), with highs reaching up to 37°C (99°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec242736425264747161453524
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.

August Precipitation in Fairfield

In Fairfield in August, the precipitation amount is 15 mm (0.6 in) over the course of 3 days.

August Precipitation Trends in Fairfield

The chart displays monthly precipitation patterns in Fairfield, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Fairfield, August typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec63755435481741518344848
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Fairfield

In Fairfield in August humidity is 42%. With an average temperature of 22°C (71°F), this humidity feels like a comfortable embrace, making it ideal for leisurely strolls and outdoor adventures.

August Average Humidity in Fairfield

This chart illustrates the average monthly humidity levels in Fairfield, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Fairfield is approximately 42%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%85%76%66%62%53%42%46%64%83%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Fairfield

In Fairfield in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Fairfield.

Maximum UV Index Levels in Fairfield for August

The chart shows the monthly maximum UV Index (UVI) for Fairfield in August, 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 August, the maximum UV index in Fairfield typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Fairfield August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)62 mm (2.5 inches)91%moderate
February Weather-3°C (27°F)75 mm (3.0 inches)92%moderate
March Weather2°C (36°F)54 mm (2.1 inches)85%high
April Weather6°C (43°F)35 mm (1.4 inches)76%very high
May Weather11°C (53°F)48 mm (1.9 inches)66%very high
June Weather18°C (64°F)17 mm (0.7 inches)62%extreme
July Weather23°C (74°F)4 mm (0.1 inches)53%extreme
August Weather22°C (71°F)15 mm (0.6 inches)42%very high
September Weather16°C (61°F)18 mm (0.7 inches)46%very high
October Weather7°C (45°F)34 mm (1.3 inches)64%high
November Weather1°C (35°F)48 mm (1.9 inches)83%moderate
December Weather-4°C (24°F)48 mm (1.9 inches)87%moderate

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