May weather forecastSonoma, CA
May
Weather in May
May signals the onset of a period marked by sunnier, drier conditions in Sonoma. The weather in May greets locals and visitors with consistent warmth, minimal cloud coverage, and a significant decline in rainfall. The month witnesses a transition from balmy spring to the beginnings of a sweltering summer. Extended daylight hours and longer sunshine durations underline May as an entry point to the summertime outdoor activity season. With peak relative humidity of 67%, the weather retains an undeniably fresh aura, perfect for outdoor exploration.Temperature
The average high-temperature during May registers at a pleasant 71.2°F (21.8°C), closely corresponding to the preceding month. Against the backdrop of high daytime temperatures, an average low-temperature of 48.4°F (9.1°C) is noted during May nights.Humidity
In May, the average relative humidity is 67%.Rainfall
In Sonoma, California, 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 in Sonoma is 14h and 16min.On the first day of May, sunrise is at 6:11 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:27 pm PDT.
Sunshine
In Sonoma, the average sunshine in May is 10.6h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: In May, the maximum UV index of 5 suggests these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
Average daylight in May /
Average sunshine in May
Sonoma, CA
- Average daylight in May: 14h and 18min
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 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).
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).
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).
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).
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).
