May weather forecastSouth Santa Rosa, CA
May
Weather in May
May, the last month of the spring in South Santa Rosa, is a pleasant month, with an average temperature fluctuating between 48.6°F (9.2°C) and 69.3°F (20.7°C).Temperature
With the onset of May, the average high-temperature registers at a pleasant 69.3°F (20.7°C), subtly different from April's 64.9°F (18.3°C). In May, South Santa Rosa experiences an average nighttime temperature of 48.6°F (9.2°C).Humidity
The average relative humidity in May is 70%.Rainfall
In May, the rain falls for 2.9 days. Throughout May, 0.24" (6mm) of precipitation is accumulated. Throughout the year, in South Santa Rosa, there are 44.3 rainfall days, and 3.78" (96mm) of precipitation is accumulated.Daylight
In South Santa Rosa, the average length of the day in May is 14h and 17min.On the first day of the month, sunrise is at 6:12 am and sunset at 8:03 pm. On the last day of May, sunrise is at 5:48 am and sunset at 8:28 pm PDT.
Sunshine
In May, the average sunshine is 10.6h.UV index
In South Santa Rosa, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In May, the maximum UV index of 5 suggests these recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
South Santa Rosa, CA
- Average high temperature in May: 69.3°F
The warmest months (with the highest average high temperature) are July and August (79.9°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in May: 48.6°F
The months with the highest average low temperature are August and September (55°F).
The coldest month (with the lowest average low temperature) is December (42.4°F).
Average pressure in May
South Santa Rosa, CA
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in May
South Santa Rosa, CA
- Average wind speed in May: 6.8mph
The windiest month (with the highest average wind speed) is May (6.8mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in May
South Santa Rosa, CA
- Average humidity in May: 70%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (62%).
Average rainfall in May
South Santa Rosa, CA
- Average rainfall in May: 0.24"
The wettest month (with the highest rainfall) is February (0.91").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in May
South Santa Rosa, CA
- Average rainfall days in May: 2.9 days
The month with the highest number of rainy days is March (8.7 days).
The month with the least rainy days is August (0.5 days).
Average daylight in May /
Average sunshine in May
South Santa Rosa, CA
- Average daylight in May: 14h and 18min
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 36min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in May
South Santa Rosa, CA
- Average sunshine days in May: 26.6 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is March (20.8 days).
Average UV index in May
South Santa Rosa, 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
South Santa Rosa, CA
- Average cloud cover in May: 26
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in May
South Santa Rosa, 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).
