April weather forecast
Sonoma, CA

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Neat rows of vines in a vineyard farm in Sonoma, California
Neat rows of vines in a vineyard farm in Sonoma, California

Weather in April

April treats Sonoma to more congenial weather, representing a milestone in the transition from spring to the blooming season. Temperatures tend to rise steadily, with the daily lows and highs gradually becoming more comfortable for outdoor activities. Rainfall levels plummet, making way for a rise in sunshine duration, spanning up to 13.2 hours daily. The city's weather in April sets the stage for the upcoming months, revealing a retreat of the heavier rain and the commencement of extended daylight hours.

Temperature

With the onset of April, Sonoma's weather sees a minor temperature rise, transitioning from a comfortable 61.3°F (16.3°C) in March to a still enjoyable 66.7°F (19.3°C). In April, the temperature in Sonoma registers a significant dip to an average of 45°F (7.2°C) at night.

Humidity

The average relative humidity in April in Sonoma is 71%.

Rainfall

In Sonoma, in April, it is raining for 7.8 days, with typically 0.75" (19mm) of accumulated precipitation. In Sonoma, California, during the entire year, the rain falls for 73.3 days and collects up to 15.47" (393mm) of precipitation.

Daylight

In April, the average length of the day in Sonoma is 13h and 14min.
On the first day of the month, sunrise is at 6:53 am and sunset at 7:33 pm. On the last day of April, sunrise is at 6:13 am and sunset at 8:00 pm PDT.

Sunshine

The average sunshine in April is 10h.

UV index

The average daily maximum UV index in April in Sonoma is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A typical high UV index of 5 in April suggests the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Stay sun-safe with clothing that is both closely woven and worn loosely.
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Frequently asked questions

What are April temperatures in Sonoma?

In Sonoma, 66.7°F (19.3°C) is the average high-temperature and 45°F (7.2°C) is the average low-temperature during April.

What is the average humidity in April in Sonoma?

In April, the average relative humidity is 71%.

How much does it rain in Sonoma in April?

In April, the rain falls for 7.8 days. Throughout April, 0.75" (19mm) of precipitation is accumulated.

What is the average length of the day in April in Sonoma?

In April, the average day length in Sonoma, California, is 13h and 14min.

When are sunrise and sunset in April in Sonoma?

In April, on the first day of the month, sunrise is at 6:53 am and sunset at 7:33 pm. On the last day of the month, in Sonoma, California, sunrise is at 6:13 am and sunset at 8:00 pm PDT.

How long on average sun shines in April in Sonoma?

In April, the average sunshine duration is 10h.

How high is the UV index in April in Sonoma?

In April, the average daily maximum UV index in Sonoma is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Sonoma, CA

Average temperature in April - Sonoma, CA
  • Average high temperature in April: 66.7°F

The warmest month (with the highest average high temperature) is August (82.9°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in April: 45°F

The month with the highest average low temperature is August (54.9°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

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Average pressure in April
Sonoma, CA

Average pressure in April - Sonoma, CA
  • Average pressure in April: 30.03"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in April
Sonoma, CA

Average wind speed in April - Sonoma, CA
  • Average wind speed in April: 6mph

The windiest month (with the highest average wind speed) is May (6.2mph).
The calmest month (with the lowest average wind speed) is November (4.4mph).

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Average humidity in April
Sonoma, CA

Average humidity in April - Sonoma, CA
  • Average humidity in April: 71%

The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (59%).

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Average rainfall in April
Sonoma, CA

Average rainfall in April - Sonoma, CA
  • Average rainfall in April: 0.75"

The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in April
Sonoma, CA

Average rainfall days in April - Sonoma, CA
  • Average rainfall days in April: 7.8 days

The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (0.8 days).

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

Average daylight in April / Average sunshine in April - Sonoma, CA
  • Average daylight in April: 13h and 1min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in April: 10h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

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Average sunshine days in April
Sonoma, CA

Average sunshine days in April - Sonoma, CA
  • Average sunshine days in April: 21.3 days

The month with the most sunshine days is July (28.7 days).
The month with the least sunshine days is March (16.1 days).

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Average UV index in April
Sonoma, CA

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

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

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Average cloud cover in April
Sonoma, CA

Average cloud cover in April - Sonoma, CA
  • Average cloud cover in April: 30

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 8).

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Average visibility in April
Sonoma, CA

Average visibility in April - Sonoma, CA
  • Average visibility in April: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Sonoma, California, USA

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