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 snowfall in May
- Average snowfall 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
Rio Dell's average high-temperature in May sits at a still refreshing 63°F (17.2°C), showing little difference from the previous month. Throughout May, Rio Dell records an average temperature of 44.1°F (6.7°C) at night.Humidity
In Rio Dell, the average relative humidity in May is 79%.Rainfall
In Rio Dell, in May, during 8.1 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, there are 110.9 rainfall days, and 28.27" (718mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
In Rio Dell, the average length of the day in May is 14h and 27min.On the first day of May, sunrise is at 6:14 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:40 pm PDT.
Sunshine
The average sunshine in May is 9.9h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 4 in May interprets into the following advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rio Dell in May?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
How many hours of daylight does Rio Dell have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Rio Dell, CA
- Average high temperature in May: 63°F
The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in May: 44.1°F
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is February (39.7°F).
Average pressure in May
Rio Dell, CA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are August and September (29.96"Hg).
Average wind speed in May
Rio Dell, CA
- Average wind speed in May: 7.2mph
The windiest month (with the highest average wind speed) is June (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in May
Rio Dell, CA
- Average humidity in May: 79%
The month with the highest relative humidity is March (83%).
The month with the lowest relative humidity is September (73%).
Average rainfall in May
Rio Dell, CA
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is December (4.96").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in May
Rio Dell, CA
- Average rainfall days in May: 8.1 days
The month with the highest number of rainy days is March (17.3 days).
The months with the least rainy days are July and August (1.8 days).
Average snowfall in May
Rio Dell, CA
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in May
Rio Dell, CA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in May /
Average sunshine in May
Rio Dell, CA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 9h and 5min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in May
Rio Dell, CA
- Average sunshine days in May: 21.1 days
The month with the most sunshine days is July (28.5 days).
The month with the least sunshine days is March (11.9 days).
Average UV index in May
Rio Dell, CA
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in May
Rio Dell, CA
- Average cloud cover in May: 37
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in May
Rio Dell, CA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).
Rio Dell, California, USA
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