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 advent of May brings an average high-temperature of a still enjoyable 64.9°F (18.3°C), almost identical to the preceding month. An average low-temperature of 50.4°F (10.2°C) is common during the nights of May.Humidity
The average relative humidity in May is 75%.Rainfall
In San Rafael, California, in May, it is raining for 3.3 days, with typically 0.28" (7mm) of accumulated precipitation. In San Rafael, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.Daylight
In San Rafael, the average length of the day in May is 14h and 14min.On the first day of May, sunrise is at 6:12 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:26 pm PDT.
Sunshine
In San Rafael, the average sunshine in May is 10h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in May converts into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
How much does it rain in May?
How many hours of daylight does San Rafael have in May?
What time 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
San Rafael, CA
- Average high temperature in May: 64.9°F
The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in May: 50.4°F
The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).
Average pressure in May
San Rafael, 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
San Rafael, CA
- Average wind speed in May: 7.8mph
The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).
Average humidity in May
San Rafael, CA
- Average humidity in May: 75%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).
Average rainfall in May
San Rafael, CA
- Average rainfall in May: 0.28"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in May
San Rafael, CA
- Average rainfall days in May: 3.3 days
The month with the highest number of rainy days is March (8.8 days).
The months with the least rainy days are June and August (1.2 days).
Average daylight in May /
Average sunshine in May
San Rafael, CA
- Average daylight in May: 14h and 1min
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 0min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in May
San Rafael, CA
- Average sunshine days in May: 24.7 days
The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).
Average UV index in May
San Rafael, CA
- Average UV index in May: 4
The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in May
San Rafael, CA
- Average cloud cover in May: 31
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in May
San Rafael, 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).
San Rafael, California, USA
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