April weather forecastOakland, CA
April
Weather in April
April in Oakland marks the true onset of spring, characterized by longer daylight hours and increased temperatures. With a decrease in humidity, the spring air feels crisp and refreshing. Further elevating the tranquil ambiance is the mild sea temperature, fostering pleasant conditions for water enthusiasts. The most prominent distinction is the noticeable drop in rainfall to 0.16" (4mm), spread over roughly five days, indicating drier conditions when compared to March. The weather in May exhibits a consistent, yet more amplified spring pattern.Temperature
In April, the average high-temperature registers at an enjoyable 63.1°F (17.3°C), nearly identical to March's 60.4°F (15.8°C). Throughout the month of April, Oakland expects an average low of 48.6°F (9.2°C).Humidity
In April, the average relative humidity is 73%.Rainfall
In April, the rain falls for 5.1 days. Throughout April, 0.16" (4mm) 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: Swimming in 53.1°F (11.7°C) is deemed hazardous. Exposure to temperatures below 50°F (10°C) leads to immediate severe cold shock and hyperventilation.
Daylight
The average length of the day in April is 13h and 13min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:32 pm. On the last day of April, sunrise is at 6:13 am and sunset at 7:59 pm PDT.
Sunshine
In Oakland, the average sunshine in April is 10.4h.UV index
The months with the highest UV index are April through September, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 5 during April translates into these guidelines:
Be vigilant - Suggestions to stave off sun damage are provided. When the Sun is at its strongest around midday, find shade and limit exposure. 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 April
Oakland, CA
- Average high temperature in April: 63.1°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 April: 48.6°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 April
Oakland, CA
- Average pressure in April: 30.03"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 April
Oakland, CA
- Average wind speed in April: 7.3mph
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 April
Oakland, CA
- Average humidity in April: 73%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (67%).
Average rainfall in April
Oakland, CA
- Average rainfall in April: 0.16"
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 April
Oakland, CA
- Average rainfall days in April: 5.1 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 April
Oakland, CA
- Average sea temperature in April: 53°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 April /
Average sunshine in April
Oakland, CA
- Average daylight in April: 13h 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 April: 10h and 24min
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 April
Oakland, CA
- Average sunshine days in April: 23.9 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 April
Oakland, CA
- Average UV index in April: 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 April
Oakland, CA
- Average cloud cover in April: 27
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 April
Oakland, CA
- Average visibility in April: 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).
