August weather forecast
Fairfield, CA

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Weather in August

August, the last month of the summer in Fairfield, is another tropical month, with an average temperature fluctuating between 86.7°F (30.4°C) and 57°F (13.9°C).

Temperature

The onset of August brings an average high-temperature of a still tropical 86.7°F (30.4°C), nearly matching the July temperature. The average low-temperature reading in August for Fairfield reflects a significant fall from the daytime highs, stabilizing at a refreshing 57°F (13.9°C).

Heat index

For August, the heat index is appraised at a tropical 91.4°F (33°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.

Humidity

In Fairfield, the average relative humidity in August is 57%.

Rainfall

The only month without rainfall in Fairfield is August.

Daylight

In August, the average length of the day is 13h and 36min.
On the first day of the month, sunrise is at 6:11 am and sunset at 8:17 pm. On the last day of August, in Fairfield, California, sunrise is at 6:37 am and sunset at 7:38 pm PDT.

Sunshine

In Fairfield, the average sunshine in August is 12h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Fairfield, California. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 6 during August leads to these advisories:
Deter overexposure. Protecting against the sun's effects is essential. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

Is it hot in Fairfield during August?

The high-temperature, in August, in Fairfield, is 86.7°F (30.4°C), while the low-temperature averages to 57°F (13.9°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is appraised at 91.4°F (33°C).

What is the average humidity in August in Fairfield?

In Fairfield, California, the average relative humidity in August is 57%.

What is the driest month in Fairfield?

August is the only month when rain does not fall.

Does it rain in Fairfield in August?

In August, in Fairfield, California, it doesn't rain. July is the latest month when it rains.

What is the average length of the day in August in Fairfield?

In Fairfield, the average day length in August is 13h and 36min.

What time are sunrise and sunset in August in Fairfield?

In August, on the first day of the month, sunrise is at 6:11 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 7:38 pm PDT.

How long on average sun shines in August in Fairfield?

In Fairfield, the average sunshine duration in August is 12h.

When is the highest UV index in Fairfield?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

How high is the UV index in August in Fairfield?

In August, the average daily maximum UV index in Fairfield, California, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Fairfield, CA

Average temperature in August - Fairfield, CA
  • Average high temperature in August: 86.7°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is December (54.9°F).

  • Average low temperature in August: 57°F

The month with the highest average low temperature is September (57.6°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure in August
Fairfield, CA

Average pressure in August - Fairfield, CA
  • Average pressure in August: 29.91"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in August
Fairfield, CA

Average wind speed in August - Fairfield, CA
  • Average wind speed in August: 6.6mph

The windiest months (with the highest average wind speed) are May, June and July (7mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).

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Average humidity in August
Fairfield, CA

Average humidity in August - Fairfield, CA
  • Average humidity in August: 57%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (52%).

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Average rainfall in August
Fairfield, CA

Average rainfall in August - Fairfield, CA
  • Average rainfall in August: 0"

The wettest month (with the highest rainfall) is February (2.4").
The driest month (with the least rainfall) is August (0").

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Average rainfall days in August
Fairfield, CA

Average rainfall days in August - Fairfield, CA
  • Average rainfall days in August: 0.7 days

The month with the highest number of rainy days is March (12.9 days).
The month with the least rainy days is August (0.7 days).

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Average daylight in August /
Average sunshine in August
Fairfield, CA

Average daylight in August / Average sunshine in August - Fairfield, CA
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 12h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in August
Fairfield, CA

Average sunshine days in August - Fairfield, CA
  • Average sunshine days in August: 30.2 days

The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is March (17 days).

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Average UV index in August
Fairfield, CA

Average UV index in August - Fairfield, CA
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in August
Fairfield, CA

Average cloud cover in August - Fairfield, CA
  • Average cloud cover in August: 6

The months with the most cloud cover are March and December (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 5).

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Average visibility in August
Fairfield, CA

Average visibility in August - Fairfield, CA
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Fairfield, California, USA

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