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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 25°C (78°F), making it a pleasant time of year. Expect a minimum of 15°C (59°F) and a maximum of 35°C (96°F), providing a comfortable range for outdoor activities. However, be prepared for some rain; precipitation averages 148 mm (5.8 in) over 13 days. The air remains relatively humid, with an average humidity of 61%, ensuring a warm, tropical ambiance.

August Temperature in Fairfield

In August in Fairfield, the average temperature is 25°C (78°F). Maximums can reach 35°C (96°F), and minimums can be as low as 15°C (59°F). This makes it an ideal time for travelers seeking pleasant weather and outdoor activities.

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 25°C (78°F), with highs reaching up to 35°C (96°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec394152586876797774614944
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 148 mm (5.8 in) occurring over the course of 13 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 148 mm (5.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec9111714416921093111148831698389
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 61%. With an average temperature of 25°C (78°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities slightly sticky but still enjoyable, especially if you stay hydrated and take breaks in the shade.

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 61%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%77%78%82%81%75%61%59%69%82%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46710111111109754
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 Weather4°C (39°F)91 mm (3.6 inches)82%moderate
February Weather5°C (42°F)116 mm (4.6 inches)79%high
March Weather11°C (53°F)144 mm (5.7 inches)77%high
April Weather14°C (58°F)169 mm (6.7 inches)78%very high
May Weather20°C (68°F)210 mm (8.3 inches)82%extreme
June Weather24°C (76°F)93 mm (3.6 inches)81%extreme
July Weather26°C (80°F)111 mm (4.4 inches)75%extreme
August Weather25°C (78°F)148 mm (5.8 inches)61%very high
September Weather23°C (74°F)83 mm (3.3 inches)59%very high
October Weather16°C (61°F)169 mm (6.7 inches)69%high
November Weather9°C (49°F)83 mm (3.3 inches)82%moderate
December Weather7°C (44°F)89 mm (3.5 inches)87%moderate

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