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 onset brings a minor rise in the average high-temperature, moving from an agreeable 68°F (20°C) in April to a warm 73.6°F (23.1°C). Yountville registers a marked temperature plunge to a frosty 48.2°F (9°C) during the cool May nights.Humidity
The average relative humidity in May in Yountville is 65%.Rainfall
In Yountville, in May, it is raining for 5.6 days, with typically 0.83" (21mm) of accumulated precipitation. In Yountville, during the entire year, the rain falls for 77.8 days and collects up to 16.02" (407mm) of precipitation.Daylight
The average length of the day in May in Yountville is 14h and 17min.On the first day of the month, sunrise is at 6:11 am and sunset at 8:01 pm. On the last day of May, sunrise is at 5:47 am and sunset at 8:27 pm PDT.
Sunshine
The average sunshine in May is 10.7h.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In May, the average maximum UV index of 5 translates into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What is the average May temperature in Yountville?
What is the average humidity in May in Yountville?
How much does it rain in Yountville in May?
What is the average length of the day in May in Yountville?
What time are sunrise and sunset in May in Yountville?
How long on average sun shines in May in Yountville?
What is the UV index reading in May in Yountville?
Average temperature in May
Yountville, CA
- Average high temperature in May: 73.6°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in May: 48.2°F
The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in May
Yountville, CA
- Average pressure in May: 29.97"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
Yountville, CA
- Average wind speed in May: 6mph
The windiest month (with the highest average wind speed) is May (6mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).
Average humidity in May
Yountville, CA
- Average humidity in May: 65%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (54%).
Average rainfall in May
Yountville, CA
- Average rainfall in May: 0.83"
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
Yountville, CA
- Average rainfall days in May: 5.6 days
The month with the highest number of rainy days is March (13.9 days).
The month with the least rainy days is August (0.9 days).
Average daylight in May /
Average sunshine in May
Yountville, 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: 10h and 4min
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
Yountville, CA
- Average sunshine days in May: 24.1 days
The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (15.8 days).
Average UV index in May
Yountville, 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
Yountville, CA
- Average cloud cover in May: 25
The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in May
Yountville, 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).
Yountville, California, USA
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