April weather forecast and climate
Grass Valley, CA

Weather in April

April in Grass Valley, California, is a comfortable spring month, with average temperature ranging between min 43.3°F (6.3°C) and max 63.1°F (17.3°C).

Temperature

In Grass Valley, California, the average high-temperature marginally rises, from a mild 56.5°F (13.6°C) in March, to an enjoyable 63.1°F (17.3°C). In Grass Valley, California, the average low-temperature is 43.3°F (6.3°C).

Humidity

In April, the average relative humidity in Grass Valley is 68%.

Rainfall

In Grass Valley, in April, during 10.3 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Grass Valley, during the entire year, the rain falls for 82 days and collects up to 33.11" (841mm) of precipitation.

Snowfall

Months with snowfall are January through May, November and December. In Grass Valley, snow falls for 0.3 days, with typically accumulated 0.24" (6mm) of snow. In Grass Valley, during the entire year, snow falls for 6.8 days, and aggregates up to 14.41" (366mm) of snow.

Daylight

The average length of the day in Grass Valley, California, is 13.3h.

Sunshine

In April, the average sunshine in Grass Valley is 9.9h.

UV index

In April, the average daily maximum UV index in Grass Valley is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: In April, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in April in Grass Valley?

In April, the average high-temperature is 63.1°F (17.3°C), and the average low-temperature is 43.3°F (6.3°C).

What is the average humidity in April in Grass Valley?

The average relative humidity in April in Grass Valley is 68%.

How many days does it rain in April in Grass Valley?

In Grass Valley, California, in April, it is raining for 10.3 days, with typically 2.28" (58mm) of accumulated precipitation.

How much does it snow in Grass Valley in April?

In Grass Valley, during April, snow falls for 0.3 days and regularly aggregates up to 0.24" (6mm) of snow.

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

In Grass Valley, the average length of the day in April is 13.3h.

How long on average sun shines in April in Grass Valley?

In Grass Valley, California, the average sunshine in April is 9.9h.

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

In April, the average daily maximum UV index in Grass Valley is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in April
Grass Valley, CA

Average temperature in April - Grass Valley, CA
  • Average high temperature in April: 63.1°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 April: 43.3°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 April
Grass Valley, CA

Average pressure in April - Grass Valley, CA
  • Average pressure in April: 30.01"

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 April
Grass Valley, CA

Average wind speed in April - Grass Valley, CA
  • Average wind speed in April: 5.7mph

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 April
Grass Valley, CA

Average humidity in April - Grass Valley, CA
  • Average humidity in April: 68%

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 April
Grass Valley, CA

Average rainfall in April - Grass Valley, CA
  • Average rainfall in April: 2.28"

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 April
Grass Valley, CA

Average rainfall days in April - Grass Valley, CA
  • Average rainfall days in April: 10.3 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 April
Grass Valley, CA

Average snowfall in April - Grass Valley, CA
  • Average snowfall in April: 0.24"

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 April
Grass Valley, CA

Average snowfall days in April - Grass Valley, CA
  • Average snowfall days in April: 0.3 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 April /
Average sunshine in April
Grass Valley, CA

Average daylight in April / Average sunshine in April - Grass Valley, CA
  • Average daylight in April: 13.3h

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 April: 9.9h

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 April
Grass Valley, CA

Average sunshine days in April - Grass Valley, CA
  • Average sunshine days in April: 18.8 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 April
Grass Valley, CA

Average UV index in April - Grass Valley, CA
  • Average UV index in April: 4

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 April
Grass Valley, CA

Average cloud cover in April - Grass Valley, CA
  • Average cloud cover in April: 31

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 April
Grass Valley, CA

Average visibility in April - Grass Valley, CA
  • Average visibility in April: 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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