August weather forecast and climate
Fontana, CA

Weather in August

The last month of the summer, August, is also a hot month in Fontana, California, with temperature in the range of an average high of 92.1°F (33.4°C) and an average low of 67.3°F (19.6°C).

Temperature

With an average high-temperature of 92.1°F (33.4°C) and an average low-temperature of 67.3°F (19.6°C), August is the warmest month.

Humidity

The least humid month is August, with an average relative humidity of 39%.

Rainfall

In Fontana, during 1.7 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. In Fontana, during the entire year, the rain falls for 48.1 days and collects up to 6.89" (175mm) of precipitation.

Snowfall

January, March through December are months without snowfall in Fontana.

Daylight

The average length of the day in Fontana is 13.4h.

Sunshine

June through August, with an average of 12.1h of sunshine, are months with the most sunshine.

UV index

July and August, with an average maximum UV index of 7, are months with the highest UV index in Fontana. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Fontana?

August is the warmest month, with an average high-temperature of 92.1°F (33.4°C) and an average low-temperature of 67.3°F (19.6°C).

What is the temperature in August in Fontana?

The average high-temperature, in August, in Fontana, is 92.1°F (33.4°C), while the average low-temperature is 67.3°F (19.6°C).

What is the least humid month in Fontana?

The least humid month in Fontana is August, with an average relative humidity of 39%.

What is the average humidity in August in Fontana?

In Fontana, the average relative humidity in August is 39%.

How many days does it rain in August in Fontana?

In Fontana, California, in August, it is raining for 1.7 days, with typically 0.08" (2mm) of accumulated precipitation.

When it does not snow in Fontana?

In Fontana snow does not fall in January, March through December.

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

In Fontana, California, the average length of the day in August is 13.4h.

What is the month with the most sunshine in Fontana?

June through August, with an average of 12.1h of sunshine, are months with the most sunshine in Fontana, California.

How many hours of sunshine does Fontana have in August?

In August, the average sunshine in Fontana, California, is 12.1h.

What is the month with the highest UV index in Fontana?

July and August, with an average maximum UV index of 7, are months with the highest UV index in Fontana.

What is the UV index intensity in August in Fontana?

The average daily maximum UV index in August in Fontana, California, is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in August
Fontana, CA

Average temperature in August - Fontana, CA
  • Average high temperature in August: 92.1°F

The warmest month (with the highest average high temperature) is August (92.1°F).
The month with the lowest average high temperature is December (60.8°F).

  • Average low temperature in August: 67.3°F

The month with the highest average low temperature is August (67.3°F).
The coldest months (with the lowest average low temperature) are February and December (44.2°F).

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Average pressure in August
Fontana, CA

Average pressure in August - Fontana, CA
  • Average pressure in August: 29.87"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in August
Fontana, CA

Average wind speed in August - Fontana, CA
  • Average wind speed in August: 4.8mph

The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in August
Fontana, CA

Average humidity in August - Fontana, CA
  • Average humidity in August: 39%

Months with the highest relative humidity are February, March and May (52%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in August
Fontana, CA

Average rainfall in August - Fontana, CA
  • Average rainfall in August: 0.08"

The wettest month (with the highest rainfall) is February (1.57").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in August
Fontana, CA

Average rainfall days in August - Fontana, CA
  • Average rainfall days in August: 1.7 days

The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days in August
Fontana, CA

Average snowfall days in August - Fontana, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in August / Average sunshine in August - Fontana, CA
  • Average daylight in August: 13.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in August: 12.1h

Months with the most sunshine are June, July and August (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.9h).

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Average sunshine days in August
Fontana, CA

Average sunshine days in August - Fontana, CA
  • Average sunshine days in August: 27.2 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.1 days).

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Average UV index in August
Fontana, CA

Average UV index in August - Fontana, CA
  • Average UV index in August: 7

Months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in August
Fontana, CA

Average cloud cover in August - Fontana, CA
  • Average cloud cover in August: 4

Months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in August
Fontana, CA

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

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

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