Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's arrival signals a modest temperature shift, moving from a pleasant 69.4°F (20.8°C) in April to a moderately hot 76.5°F (24.7°C). Vacaville experiences a significant downturn from peak daytime temperatures throughout May, with the average low-temperature dipping to a cool 50.4°F (10.2°C).Humidity
In Vacaville, the average relative humidity in May is 60%.Rainfall
In May, the rain falls for 3.6 days. Throughout May, 0.24" (6mm) of precipitation is accumulated. Throughout the year, in Vacaville, there are 47.1 rainfall days, and 4.17" (106mm) of precipitation is accumulated.Daylight
In May, the average length of the day is 14h and 16min.On the first day of May in Vacaville, sunrise is at 6:09 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:25 pm PDT.
Sunshine
The average sunshine in May is 11h.UV index
In May, the average daily maximum UV index in Vacaville, California, is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Vacaville in May?
What is the average humidity in May in Vacaville?
How many days does it rain in May in Vacaville?
How many hours of daylight does Vacaville have in May?
When is the sunrise / sunset in May in Vacaville?
How many hours of sunshine does Vacaville have in May?
How high is the UV index in May in Vacaville?
Average temperature in May
Vacaville, CA
- Average high temperature in May: 76.5°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in May: 50.4°F
The month with the highest average low temperature is September (58.1°F).
The coldest months (with the lowest average low temperature) are January and December (41.4°F).
Average pressure in May
Vacaville, CA
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in May
Vacaville, CA
- Average wind speed in May: 6.8mph
The windiest months (with the highest average wind speed) are May and June (6.8mph).
The calmest months (with the lowest average wind speed) are January and November (4.7mph).
Average humidity in May
Vacaville, CA
- Average humidity in May: 60%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (48%).
Average rainfall in May
Vacaville, CA
- Average rainfall in May: 0.24"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are July, August and September (0.04").
Average rainfall days in May
Vacaville, CA
- Average rainfall days in May: 3.6 days
The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is August (1 days).
Average daylight in May /
Average sunshine in May
Vacaville, CA
- Average daylight in May: 14h and 2min
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 30min).
- Average sunshine in May: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in May
Vacaville, CA
- Average sunshine days in May: 26.5 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is February (21.5 days).
Average UV index in May
Vacaville, CA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in May
Vacaville, CA
- Average cloud cover in May: 21
The months with the most cloud cover are March and December (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in May
Vacaville, 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).
Vacaville, California, USA
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