July weather forecast and climate
Fontana, CA

Weather in July

July in Fontana, California, is a tropical summer month, with temperature in the range of an average high of 91°F (32.8°C) and an average low of 65.8°F (18.8°C).

Temperature

In July, the average high-temperature slightly increases, from a moderately hot 85.3°F (29.6°C) in June, to a tropical 91°F (32.8°C). In July, the average low-temperature is 65.8°F (18.8°C).

Heat index

The average heat index in July is calculated to a hot 93°F (33.9°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like pregnancy, metabolic differences, clothing, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In July, the average relative humidity is 42%.

Rainfall

In July, the rain falls for 3.2 days. Throughout July, 0.2" (5mm) of precipitation is accumulated. Throughout the year, there are 48.1 rainfall days, and 6.89" (175mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in Fontana is 14.2h.

Sunshine

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

UV index

July and August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for ordinary 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. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 temperature in July in Fontana?

The average high-temperature, in July, in Fontana, California, is 91°F (32.8°C), while the average low-temperature is 65.8°F (18.8°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), that represents influence of the relative humidity to air temperaure, in July is appraised at 93°F (33.9°C).

What is the average humidity in July in Fontana?

In Fontana, California, the average relative humidity in July is 42%.

How much does it rain in Fontana in July?

In Fontana, California, in July, during 3.2 rainfall days, 0.2" (5mm) of precipitation is typically accumulated.

When it does not snow in Fontana?

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

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

The average length of the day in July in Fontana is 14.2h.

What are the months 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 long on average sun shines in July in Fontana?

In July, the average sunshine is 12.1h.

What are the months with the highest UV index in Fontana?

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

How high is the UV index in July in Fontana?

In July, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.

Average temperature in July
Fontana, CA

Average temperature in July - Fontana, CA
  • Average high temperature in July: 91°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 July: 65.8°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 July
Fontana, CA

Average pressure in July - Fontana, CA
  • Average pressure in July: 29.88"

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 July
Fontana, CA

Average wind speed in July - Fontana, CA
  • Average wind speed in July: 5.2mph

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 July
Fontana, CA

Average humidity in July - Fontana, CA
  • Average humidity in July: 42%

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 July
Fontana, CA

Average rainfall in July - Fontana, CA
  • Average rainfall in July: 0.2"

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 July
Fontana, CA

Average rainfall days in July - Fontana, CA
  • Average rainfall days in July: 3.2 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 July
Fontana, CA

Average snowfall days in July - Fontana, CA
  • Average snowfall days in July: 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 July /
Average sunshine in July
Fontana, CA

Average daylight in July / Average sunshine in July - Fontana, CA
  • Average daylight in July: 14.2h

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 July: 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 July
Fontana, CA

Average sunshine days in July - Fontana, CA
  • Average sunshine days in July: 25.8 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 July
Fontana, CA

Average UV index in July - Fontana, CA
  • Average UV index in July: 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 July
Fontana, CA

Average cloud cover in July - Fontana, CA
  • Average cloud cover in July: 6

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 July
Fontana, CA

Average visibility in July - Fontana, CA
  • Average visibility in July: 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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