July weather forecast and climate
Grass Valley, CA

Weather in July

July is a hot summer month in Grass Valley, California, with average temperature fluctuating between 90.1°F (32.3°C) and 60.1°F (15.6°C).

Temperature

July is the warmest month, with an average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 60.1°F (15.6°C).

Humidity

July is the least humid month in Grass Valley, California, with an average relative humidity of 37%.

Rainfall

Months with the least rainfall in Grass Valley are July and August Rain falls for 1.1 days and accumulates 0.04" (1mm) of rain.

Snowfall

June through October are months without snowfall.

Daylight

In Grass Valley, the average length of the day in July is 14.6h.

Sunshine

With an average of 12.2h of sunshine, July has the most sunshine of the year in Grass Valley, California.

UV index

The month with the highest UV index is July, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: In July, the average maximum UV index of 7 translate into the following recommendations:
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. 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 Grass Valley?

The warmest month is July, with an average high-temperature of 90.1°F (32.3°C) and an average low-temperature of 60.1°F (15.6°C).

What is the temperature in July in Grass Valley?

The average high-temperature, in July, in Grass Valley, California, is 90.1°F (32.3°C), while the average low-temperature is 60.1°F (15.6°C).

What is the least humid month in Grass Valley?

July is the least humid month in Grass Valley, California, with an average relative humidity of 37%.

What is the average humidity in July in Grass Valley?

The average relative humidity in July in Grass Valley, California, is 37%.

How much does it rain in Grass Valley in July?

In Grass Valley, during July, the rain falls for 1.1 days and regularly aggregates up to 0.04" (1mm) of precipitation.

What is the driest month in Grass Valley?

July and August are months with the least rain in Grass Valley when the rain falls for 1.1 days and typically aggregates up to 0.04" (1mm) of rain.

When it does not snow in Grass Valley?

June through October are months without snowfall in Grass Valley, California.

How many hours of daylight does Grass Valley have in July?

In Grass Valley, the average length of the day in July is 14.6h.

What month has the most sunshine in Grass Valley?

With an average of 12.2h of sunshine, July has the most sunshine of the year in Grass Valley, California.

How many hours of sunshine does Grass Valley have in July?

The average sunshine in July in Grass Valley is 12.2h.

What is the month with the highest UV index in Grass Valley?

With an average maximum UV index of 7, July is the month with the highest UV index.

What is the UV index reading in July in Grass Valley?

In Grass Valley, the average daily maximum UV index in July is 7. A UV Index reading of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in July
Grass Valley, CA

Average temperature in July - Grass Valley, CA
  • Average high temperature in July: 90.1°F

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (51.3°F).

  • Average low temperature in July: 60.1°F

The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).

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Average pressure in July
Grass Valley, CA

Average pressure in July - Grass Valley, CA
  • Average pressure in July: 29.91"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in July
Grass Valley, CA

Average wind speed in July - Grass Valley, CA
  • Average wind speed in July: 5mph

The windiest month (with the highest average wind speed) is February (6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in July
Grass Valley, CA

Average humidity in July - Grass Valley, CA
  • Average humidity in July: 37%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (37%).

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Average rainfall in July
Grass Valley, CA

Average rainfall in July - Grass Valley, CA
  • Average rainfall in July: 0.04"

The wettest month (with the highest rainfall) is March (6.57").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in July
Grass Valley, CA

Average rainfall days in July - Grass Valley, CA
  • Average rainfall days in July: 1.1 days

The month with the highest number of rainy days is March (15.1 days).
The month with the least rainy days is July (1.1 days).

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Average snowfall in July
Grass Valley, CA

Average snowfall in July - Grass Valley, CA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (6.42").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in July
Grass Valley, CA

Average snowfall days in July - Grass Valley, CA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is March (2.4 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in July /
Average sunshine in July
Grass Valley, CA

Average daylight in July / Average sunshine in July - Grass Valley, CA
  • Average daylight in July: 14.6h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in July: 12.2h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is January (Average sunshine: 5.7h).

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Average sunshine days in July
Grass Valley, CA

Average sunshine days in July - Grass Valley, CA
  • Average sunshine days in July: 29.8 days

The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (14.8 days).

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Average UV index in July
Grass Valley, CA

Average UV index in July - Grass Valley, CA
  • Average UV index in July: 7

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).

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Average cloud cover in July
Grass Valley, CA

Average cloud cover in July - Grass Valley, CA
  • Average cloud cover in July: 4

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in July
Grass Valley, CA

Average visibility in July - Grass Valley, 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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