April weather forecast and climate
Guerneville, CA

Weather in April

April in Guerneville, California, is an enjoyable spring month, with average temperature varying between 44.8°F (7.1°C) and 65.7°F (18.7°C).

Temperature

In April, the average high-temperature is relatively the same as in March - an enjoyable 65.7°F (18.7°C). In Guerneville, California, in April, the average low-temperature is 44.8°F (7.1°C).

Humidity

In Guerneville, the average relative humidity is 72%.

Rainfall

In April, in Guerneville, the rain falls for 5.6 days. Throughout April, 0.51" (13mm) of precipitation is accumulated. In Guerneville, during the entire year, the rain falls for 60.1 days and collects up to 12.87" (327mm) of precipitation.

Daylight

In Guerneville, the average length of the day is 13.2h.

Sunshine

In April, the average sunshine is 9.8h.

UV index

In Guerneville, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. 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.
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FAQ

What is the temperature in April in Guerneville?

The average high-temperature, in April, in Guerneville, California, is 65.7°F (18.7°C), while the average low-temperature is 44.8°F (7.1°C).

What is the average humidity in April in Guerneville?

In April, the average relative humidity in Guerneville, California, is 72%.

How much does it rain in Guerneville in April?

In Guerneville, California, in April, during 5.6 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

How many hours of daylight does Guerneville have in April?

The average length of the day in April in Guerneville is 13.2h.

How many hours of sunshine does Guerneville have in April?

In Guerneville, California, the average sunshine in April is 9.8h.

How high is the UV index in April in Guerneville?

In Guerneville, California, the average daily maximum UV index in April is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in April
Guerneville, CA

Average temperature in April - Guerneville, CA
  • Average high temperature in April: 65.7°F

The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in April: 44.8°F

Months with the highest average low temperature are August and September (53.4°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

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Average pressure in April
Guerneville, CA

Average pressure in April - Guerneville, CA
  • Average pressure in April: 30.03"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in April
Guerneville, CA

Average wind speed in April - Guerneville, CA
  • Average wind speed in April: 7.1mph

The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (5mph).

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Average humidity in April
Guerneville, CA

Average humidity in April - Guerneville, CA
  • Average humidity in April: 72%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (62%).

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Average rainfall in April
Guerneville, CA

Average rainfall in April - Guerneville, CA
  • Average rainfall in April: 0.51"

The wettest month (with the highest rainfall) is February (3.27").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in April
Guerneville, CA

Average rainfall days in April - Guerneville, CA
  • Average rainfall days in April: 5.6 days

The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).

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Average daylight in April /
Average sunshine in April
Guerneville, CA

Average daylight in April / Average sunshine in April - Guerneville, CA
  • Average daylight in April: 13.2h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in April: 9.8h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 5.4h).

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Average sunshine days in April
Guerneville, CA

Average sunshine days in April - Guerneville, CA
  • Average sunshine days in April: 23.3 days

The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is February (19.9 days).

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Average UV index in April
Guerneville, CA

Average UV index in April - Guerneville, CA
  • Average UV index in April: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in April
Guerneville, CA

Average cloud cover in April - Guerneville, CA
  • Average cloud cover in April: 32

The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in April
Guerneville, CA

Average visibility in April - Guerneville, 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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