May weather forecastAlameda, CA
May
Weather in May
The last month of the spring, May, is another comfortable month in Alameda, California, with an average temperature varying between 50.2°F (10.1°C) and 67.6°F (19.8°C).Temperature
Alameda registers an average high-temperature of a still comfortable 67.6°F (19.8°C) with the arrival of May, showing minor deviation from the preceding month. During the nights in May, Alameda experiences a consistent average temperature of 50.2°F (10.1°C).Humidity
In May, the average relative humidity is 71%.Rainfall
In Alameda, in May, during 4.8 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Alameda, during the entire year, the rain falls for 67.2 days and collects up to 6.1" (155mm) of precipitation.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: Being in 53.1°F (11.7°C) waters at 55.4°F (13°C) is discomforting, but anything below 50°F (10°C) can jeopardize breathing and induce cold shock, factoring in physical endurance.
Daylight
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 7:59 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:24 pm PDT.
Sunshine
In Alameda, California, the average sunshine in May is 10.8h.UV index
April through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In May, the maximum UV index of 5 suggests this advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Alameda, CA
- Average high temperature in May: 67.6°F
The warmest month (with the highest average high temperature) is September (75.9°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in May: 50.2°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 (45°F).
Average pressure in May
Alameda, 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
Alameda, CA
- Average wind speed in May: 7.2mph
The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest months (with the lowest average wind speed) are October and November (5.2mph).
Average humidity in May
Alameda, 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
Alameda, CA
- Average rainfall in May: 0.31"
The wettest month (with the highest rainfall) is February (1.18").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in May
Alameda, CA
- Average rainfall days in May: 4.8 days
The month with the highest number of rainy days is March (11.4 days).
The month with the least rainy days is August (1.3 days).
Average sea temperature in May
Alameda, 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
Alameda, CA
- Average daylight in May: 14h and 12min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 10h and 48min
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 54min).
Average sunshine days in May
Alameda, CA
- Average sunshine days in May: 22.3 days
The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in May
Alameda, 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, November and December (UV index 3).
Average cloud cover in May
Alameda, CA
- Average cloud cover in May: 24
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in May
Alameda, 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).
