April weather forecastRedwood City, CA
April
Weather in April
April in Redwood City, California, is an enjoyable spring month, with an average temperature fluctuating between 48.2°F (9°C) and 62.8°F (17.1°C).Temperature
April ushers in an average high-temperature of a still refreshing 62.8°F (17.1°C), aligning closely with the preceding month. April witnesses an average low-temperature hovering around a frosty 48.2°F (9°C).Humidity
The average relative humidity in April in Redwood City is 73%.Rainfall
In Redwood City, California, in April, during 7.8 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Redwood City, during the entire year, the rain falls for 73.4 days and collects up to 11.89" (302mm) of precipitation.Ocean temperature
April is the month with the coldest seawater, with an average ocean temperature of 53.4°F (11.9°C).Note: In 53.4°F (11.9°C), even brief exposure to 55.4°F (13°C) feels biting, and anything less than 50°F (10°C) risks cold shock and impaired breathing, considering one's health.
Daylight
In April, the average length of the day is 13h and 11min.On the first day of April, sunrise is at 6:52 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 7:58 pm PDT.
Sunshine
The average sunshine in April is 10.3h.UV index
In Redwood City, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 4 in April transforms into this advice:
Guard yourself - Precautionary measures against sun damage are advocated. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Redwood City, CA
- Average high temperature in April: 62.8°F
The warmest months (with the highest average high temperature) are July and August (73°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in April: 48.2°F
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in April
Redwood City, CA
- Average pressure in April: 30.04"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in April
Redwood City, CA
- Average wind speed in April: 7.5mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.5mph).
Average humidity in April
Redwood City, 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 (68%).
Average rainfall in April
Redwood City, CA
- Average rainfall in April: 0.67"
The wettest month (with the highest rainfall) is February (2.36").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in April
Redwood City, CA
- Average rainfall days in April: 7.8 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (0.8 days).
Average sea temperature in April
Redwood City, CA
- Average sea temperature in April: 53.4°F
The best months for swimming (with the highest average sea temperature) are August and September (57.7°F).
The coldest month (with the lowest average sea temperature) is April (53.4°F).
Average daylight in April /
Average sunshine in April
Redwood City, 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 18min
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 48min).
Average sunshine days in April
Redwood City, CA
- Average sunshine days in April: 21.3 days
The month with the most sunshine days is August (27.6 days).
The month with the least sunshine days is March (17.5 days).
Average UV index in April
Redwood City, CA
- Average UV index in April: 4
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in April
Redwood City, 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 9).
Average visibility in April
Redwood City, 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).
