May weather forecast
Sonoma, CA

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

Weather in May

The last month of the spring, May, is an agreeable month in Sonoma, California, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 71.2°F (21.8°C).

Temperature

In May, the average high-temperature is almost the same as in April - a pleasant 71.2°F (21.8°C). In May, the average low-temperature is 48.4°F (9.1°C).

Humidity

In Sonoma, California, the average relative humidity in May is 67%.

Rainfall

In Sonoma, during May, the rain falls for 5.1 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Sonoma, during the entire year, the rain falls for 73.3 days and collects up to 15.47" (393mm) of precipitation.

Daylight

In May, the average length of the day is 14h and 16min.
On the first day of May in Sonoma, sunrise is at 6:12 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:26 pm PDT.

Sunshine

In May, the average sunshine is 10.6h.

UV index

In Sonoma, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 5 in May interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in May in Sonoma?

In May, the average relative humidity is 67%.

How many days does it rain in May in Sonoma?

In Sonoma, in May, during 5.1 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

How many hours of daylight does Sonoma have in May?

The average day length in May in Sonoma, California, is 14h and 16min.

What time are sunrise and sunset in May in Sonoma?

On the first day of May in Sonoma, sunrise is at 6:12 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:26 pm PDT.

How long on average sun shines in May in Sonoma?

In May, the average sunshine duration is 10.6h.

What is the UV index reading in May in Sonoma?

The average daily maximum UV index in May in Sonoma is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Sonoma, CA

Average temperature in May - Sonoma, CA
  • Average high temperature in May: 71.2°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 May: 48.4°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 May
Sonoma, CA

Average pressure in May - Sonoma, CA
  • Average pressure in May: 29.97"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 May
Sonoma, CA

Average wind speed in May - Sonoma, CA
  • Average wind speed in May: 6.2mph

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 May
Sonoma, CA

Average humidity in May - Sonoma, CA
  • Average humidity in May: 67%

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 May
Sonoma, CA

Average rainfall in May - Sonoma, CA
  • Average rainfall in May: 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 May
Sonoma, CA

Average rainfall days in May - Sonoma, CA
  • Average rainfall days in May: 5.1 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 May /
Average sunshine in May
Sonoma, CA

Average daylight in May / Average sunshine in May - Sonoma, CA
  • Average daylight in May: 14h and 16min

The month with the longest days is June (Average daylight: 14h and 47min).
The month with the shortest days is December (Average daylight: 9h and 33min).

  • Average sunshine in May: 10h and 36min

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 May
Sonoma, CA

Average sunshine days in May - Sonoma, CA
  • Average sunshine days in May: 24.1 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 May
Sonoma, CA

Average UV index in May - Sonoma, CA
  • Average UV index in May: 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 May
Sonoma, CA

Average cloud cover in May - Sonoma, CA
  • Average cloud cover in May: 26

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 May
Sonoma, CA

Average visibility in May - Sonoma, CA
  • Average visibility in May: 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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