May weather forecastRichmond, CA
May
Weather in May
The last month of the spring, May, is another comfortable month in Richmond, California, with an average temperature varying between 67.6°F (19.8°C) and 50.4°F (10.2°C).Temperature
In May, the average high-temperature registers at a still refreshing 67.6°F (19.8°C), nearly identical to April's 64.9°F (18.3°C). May brings an average low-temperature of 50.4°F (10.2°C) to Richmond.Humidity
In May, the average relative humidity in Richmond, California, is 71%.Rainfall
In Richmond, in May, during 4.6 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. Throughout the year, there are 64.5 rainfall days, and 5.98" (152mm) of precipitation is accumulated.Ocean temperature
The months with the coldest seawater are April through June, with an average ocean temperature of 53.1°F (11.7°C).Note: One needs to be cautious in 53.1°F (11.7°C) waters. 55.4°F (13°C) is already forbidding, but sub14°F (-10°C) can seriously disrupt your breathing and lead to a frigid shock, considering one's well-being.
Daylight
In May, the average length of the day in Richmond is 14h and 14min.On the first day of May, sunrise is at 6:12 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:25 pm PDT.
Sunshine
In May, the average sunshine is 10.5h.UV index
April through September, with an average maximum UV index of 5, are months with the highest UV index in Richmond. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 5 in May translates into the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Richmond, CA
- Average high temperature in May: 67.6°F
The warmest month (with the highest average high temperature) is September (75.7°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in May: 50.4°F
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is January (44.8°F).
Average pressure in May
Richmond, 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
Richmond, CA
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (5.1mph).
Average humidity in May
Richmond, CA
- Average humidity in May: 71%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (65%).
Average rainfall in May
Richmond, CA
- Average rainfall in May: 0.31"
The wettest month (with the highest rainfall) is February (1.38").
The driest months (with the least rainfall) are June, July, August and September (0.08").
Average rainfall days in May
Richmond, CA
- Average rainfall days in May: 4.6 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is June (2 days).
Average sea temperature in May
Richmond, CA
- Average sea temperature in May: 53.1°F
The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).
Average daylight in May /
Average sunshine in May
Richmond, CA
- Average daylight in May: 14h and 12min
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 30min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in May
Richmond, CA
- Average sunshine days in May: 22.5 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (18.4 days).
Average UV index in May
Richmond, CA
- Average UV index in May: 5
The months with the highest UV index are April, May, 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
Richmond, CA
- Average cloud cover in May: 27
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in May
Richmond, 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).
