July weather forecast and climate
Riverdale, CA

Weather in July

July is a very hot summer month in Riverdale, California, with average temperature varying between 66.9°F (19.4°C) and 102.2°F (39°C).

Temperature

July is the warmest month, with an average high-temperature of 102.2°F (39°C) and an average low-temperature of 66.9°F (19.4°C).

Humidity

The least humid month in Riverdale is July, with an average relative humidity of 30%.

Rainfall

In Riverdale, during July, the rain falls for 2.3 days and regularly aggregates up to 0.12" (3mm) of precipitation. Throughout the year, in Riverdale, there are 58.2 rainfall days, and 9.29" (236mm) of precipitation is accumulated.

Daylight

The average length of the day in Riverdale, California, is 14.4h.

Sunshine

Months with the most sunshine are June and July, with an average of 12.1h of sunshine.

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk 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 against overexposure. Protection against sun damage is needed. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the warmest month in Riverdale?

July is the warmest month in Riverdale, California, with an average high-temperature of 102.2°F (39°C) and an average low-temperature of 66.9°F (19.4°C).

What is the temperature in July in Riverdale?

The average high-temperature, in July, in Riverdale, California, is 102.2°F (39°C), while the average low-temperature is 66.9°F (19.4°C).

What is the least humid month in Riverdale?

July is the least humid month in Riverdale, with an average relative humidity of 30%.

What is the average humidity in July in Riverdale?

In July, the average relative humidity in Riverdale, California, is 30%.

How many days does it rain in July in Riverdale?

In Riverdale, California, in July, it is raining for 2.3 days, with typically 0.12" (3mm) of accumulated precipitation.

How many hours of daylight does Riverdale have in July?

The average length of the day in July in Riverdale is 14.4h.

What are the months with the most sunshine in Riverdale?

Months with the most sunshine in Riverdale, California, are June and July, with an average of 12.1h of sunshine.

How many hours of sunshine does Riverdale have in July?

In Riverdale, California, the average sunshine in July is 12.1h.

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

Months with the highest UV index in Riverdale are June through August, with an average maximum UV index of 7.

How high is the UV index in July in Riverdale?

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

Average temperature in July
Riverdale, CA

Average temperature in July - Riverdale, CA
  • Average high temperature in July: 102.2°F

The warmest month (with the highest average high temperature) is July (102.2°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in July: 66.9°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is December (43°F).

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Average pressure in July
Riverdale, CA

Average pressure in July - Riverdale, CA
  • Average pressure in July: 29.92"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.89").

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Average wind speed in July
Riverdale, CA

Average wind speed in July - Riverdale, CA
  • Average wind speed in July: 6.3mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and November (4.8mph).

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Average humidity in July
Riverdale, CA

Average humidity in July - Riverdale, CA
  • Average humidity in July: 30%

Months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).

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Average rainfall in July
Riverdale, CA

Average rainfall in July - Riverdale, CA
  • Average rainfall in July: 0.12"

The wettest months (with the highest rainfall) are January, February and March (1.54").
The driest month (with the least rainfall) is August (0.08").

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Average rainfall days in July
Riverdale, CA

Average rainfall days in July - Riverdale, CA
  • Average rainfall days in July: 2.3 days

The month with the highest number of rainy days is March (9.6 days).
The month with the least rainy days is August (0.8 days).

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Average daylight in July /
Average sunshine in July
Riverdale, CA

Average daylight in July / Average sunshine in July - Riverdale, CA
  • Average daylight in July: 14.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in July: 12.1h

Months with the most sunshine are June and July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.4h).

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Average sunshine days in July
Riverdale, CA

Average sunshine days in July - Riverdale, CA
  • Average sunshine days in July: 27.5 days

The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (19.4 days).

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Average UV index in July
Riverdale, CA

Average UV index in July - Riverdale, CA
  • Average UV index in July: 7

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, November and December (UV index 3).

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Average cloud cover in July
Riverdale, CA

Average cloud cover in July - Riverdale, CA
  • Average cloud cover in July: 5

Months with the most cloud cover are March and December (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in July
Riverdale, CA

Average visibility in July - Riverdale, 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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