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
As April turns into May, the average high-temperatures rest at a pleasant 71.1°F (21.7°C), showing a minor variation from the prior month. Throughout May, Vallejo experiences a low-temperature average of 49.8°F (9.9°C).Humidity
In Vallejo, the average relative humidity in May is 66%.Rainfall
In Vallejo, in May, during 3.6 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. Throughout the year, there are 56.9 rainfall days, and 4.88" (124mm) of precipitation is accumulated.Daylight
In May, the average length of the day is 14h and 15min.On the first day of the month, sunrise is at 6:11 am and sunset at 8:00 pm. On the last day of May, in Vallejo, California, sunrise is at 5:47 am and sunset at 8:25 pm PDT.
Sunshine
In Vallejo, the average sunshine in May is 10.8h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 5 in May leads to these recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How many days does it rain in May?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May in Vallejo?
What is the UV index intensity in May?
Average temperature in May
Vallejo, CA
- Average high temperature in May: 71.1°F
The warmest months (with the highest average high temperature) are July and September (80.1°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in May: 49.8°F
The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is January (43°F).
Average pressure in May
Vallejo, CA
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Vallejo, CA
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity in May
Vallejo, CA
- Average humidity in May: 66%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (60%).
Average rainfall in May
Vallejo, CA
- Average rainfall in May: 0.28"
The wettest month (with the highest rainfall) is February (1.14").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in May
Vallejo, CA
- Average rainfall days in May: 3.6 days
The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.9 days).
Average daylight in May /
Average sunshine in May
Vallejo, 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 36min).
- Average sunshine in May: 10h and 5min
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 42min).
Average sunshine days in May
Vallejo, CA
- Average sunshine days in May: 24.3 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (18.8 days).
Average UV index in May
Vallejo, CA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in May
Vallejo, CA
- Average cloud cover in May: 24
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in May
Vallejo, 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).
Vallejo, California, USA
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