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
The beginning of May marks a minor shift in the average high-temperature, moving from April's agreeable 69.6°F (20.9°C) to a warm 76.6°F (24.8°C). Against the backdrop of high daytime temperatures, an average low-temperature of 51.1°F (10.6°C) is noted during May nights.Humidity
In May, the average relative humidity is 59%.Rainfall
In Rio Vista, California, in May, during 4.7 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. In Rio Vista, California, during the entire year, the rain falls for 68.7 days and collects up to 11.18" (284mm) of precipitation.Daylight
In Rio Vista, the average length of the day in May is 14h and 16min.On the first day of the month, sunrise is at 6:09 am and sunset at 7:58 pm. On the last day of May, sunrise is at 5:45 am and sunset at 8:23 pm PDT.
Sunshine
In Rio Vista, the average sunshine in May is 11.2h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: During May, 5 as the daily maximum UV index converts into the following advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rio Vista in May?
What is the average humidity in May?
How much does it rain in May?
What is the average length of the day in May?
When are sunrise and sunset in May?
How many hours of sunshine does Rio Vista have in May?
What is the UV index intensity in May?
Average temperature in May
Rio Vista, CA
- Average high temperature in May: 76.6°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in May: 51.1°F
The month with the highest average low temperature is September (58.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in May
Rio Vista, CA
- Average pressure in May: 29.96"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
Rio Vista, CA
- Average wind speed in May: 7.3mph
The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in May
Rio Vista, CA
- Average humidity in May: 59%
The months with the highest relative humidity are January and March (74%).
The month with the lowest relative humidity is September (49%).
Average rainfall in May
Rio Vista, CA
- Average rainfall in May: 0.51"
The wettest month (with the highest rainfall) is February (2.17").
The driest month (with the least rainfall) is August (0").
Average rainfall days in May
Rio Vista, CA
- Average rainfall days in May: 4.7 days
The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is August (0.7 days).
Average daylight in May /
Average sunshine in May
Rio Vista, 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: 11h and 1min
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 54min).
Average sunshine days in May
Rio Vista, CA
- Average sunshine days in May: 25.8 days
The month with the most sunshine days is August (29.9 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in May
Rio Vista, 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
Rio Vista, CA
- Average cloud cover in May: 19
The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in May
Rio Vista, 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).
Rio Vista, California, USA
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