May weather forecastOakland, CA
May
Weather in May
May is a delightful time of the year in Oakland. With the progress of spring, the weather continues its warming trend, and the city experiences noticeably longer hours of daylight. The frequency of rainfall reduces drastically, complementing the boosted temperatures. Additionally, May continues to uphold consistent sea temperatures. The most striking detail comes in the meager amount of precipitation, registering merely 0.2" (5mm) over close to three days, making it an ideal time to explore Oakland outdoors. The weather in June shows a continued rise in temperature and a notable drop in other weather extremes.Temperature
A minor adjustment in Oakland's average high-temperature is noted with the start of May, touching a still refreshing 65.8°F (18.8°C) from April's 63.1°F (17.3°C). In May, Oakland experiences a temperature dip to an average of 50.4°F (10.2°C) at night.Humidity
In Oakland, the average relative humidity in May is 73%.Rainfall
In May, the rain falls for 2.8 days. Throughout May, 0.2" (5mm) of precipitation is accumulated. In Oakland, during the entire year, the rain falls for 44 days and collects up to 3.03" (77mm) of precipitation.Ocean temperature
April through June, with an average ocean temperature of 53.1°F (11.7°C), are months with the coldest seawater.Note: Unprotected swimming in 53.1°F (11.7°C) is dangerous due to potential cold shock. Especially when temperatures go below 50°F (10°C), leading to hyperventilation.
Daylight
The average length of the day in May is 14h and 14min.On the first day of the month, sunrise is at 6:12 am and sunset at 8:00 pm. On the last day of May, sunrise is at 5:48 am and sunset at 8:25 pm PDT.
Sunshine
The average sunshine in May is 10.7h.UV index
The months with the highest UV index are April through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In May, the maximum UV index of 5 translates into these guidelines:
Undertake protective steps - Recommendations to avoid sunburn are issued. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Oakland, CA
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is September (73.9°F).
The month with the lowest average high temperature is December (55.8°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 (45.7°F).
Average pressure in May
Oakland, 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
Oakland, CA
- Average wind speed in May: 7.6mph
The windiest month (with the highest average wind speed) is May (7.6mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).
Average humidity in May
Oakland, CA
- Average humidity in May: 73%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (67%).
Average rainfall in May
Oakland, CA
- Average rainfall in May: 0.2"
The wettest month (with the highest rainfall) is February (0.67").
The driest month (with the least rainfall) is July (0").
Average rainfall days in May
Oakland, CA
- Average rainfall days in May: 2.8 days
The month with the highest number of rainy days is March (8.5 days).
The months with the least rainy days are June and August (0.8 days).
Average sea temperature in May
Oakland, 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
Oakland, 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 42min
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 54min).
Average sunshine days in May
Oakland, CA
- Average sunshine days in May: 26.7 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (20.8 days).
Average UV index in May
Oakland, 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
Oakland, CA
- Average cloud cover in May: 25
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in May
Oakland, 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).
