April weather forecast
Redwood City, CA

Share
The intricate design of the organized Redwood City in California, with a scenic view of the harbor and the rest of the city
The intricate design of the organized Redwood City in California, with a scenic view of the harbor and the rest of the city

Weather in April

April is an enjoyable spring month in Redwood City, California, with an average temperature fluctuating between 62.8°F (17.1°C) and 48.2°F (9°C).

Temperature

Redwood City signifies an average high-temperature of a still refreshing 62.8°F (17.1°C) in April, closely mirroring the 59.9°F (15.5°C) of March. An average temperature of 48.2°F (9°C) marks the nights in Redwood City in April.

Humidity

In April, the average relative humidity is 73%.

Rainfall

In Redwood City, in April, during 7.8 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Redwood City, California, during the entire year, the rain falls for 73.4 days and collects up to 11.89" (302mm) of precipitation.

Ocean temperature

The month with the coldest seawater is April, with an average ocean temperature of 53.4°F (11.9°C).
Note: Diving into 53.4°F (11.9°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

In April, the average length of the day is 13h and 11min.
On the first day of April in Redwood City, 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

In Redwood City, the average sunshine in April is 10.3h.

UV index

In April, the average daily maximum UV index in Redwood City is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 4 during April translates into the following guidance:
Undertake protective steps - Recommendations to avoid sunburn are issued. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
[Resources]

Frequently asked questions

What are April temperatures in Redwood City?

The high-temperature during April is 62.8°F (17.1°C) and the low-temperature is 48.2°F (9°C).

What is the average humidity in April in Redwood City?

In Redwood City, the average relative humidity in April is 73%.

How many days does it rain in April in Redwood City?

In Redwood City, California, in April, during 7.8 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

What is the month with the coldest ocean in Redwood City?

April is the month with the coldest seawater, with an average ocean temperature of 53.4°F (11.9°C).

What is the ocean temperature in April in Redwood City?

In April, the average ocean temperature in Redwood City, California, is 53.4°F (11.9°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the average length of the day in April in Redwood City?

The average day length in April in Redwood City, California, is 13h and 11min.

When are sunrise and sunset in April in Redwood City?

On the first day of April in Redwood City, California, 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.

How long on average sun shines in April in Redwood City?

In Redwood City, the average sunshine duration in April is 10.3h.

How high is the UV index in April in Redwood City?

In Redwood City, California, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Redwood City, CA

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).

[Resources]

Average pressure in April
Redwood City, CA

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).

[Resources]

Average wind speed in April
Redwood City, CA

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).

[Resources]

Average humidity in April
Redwood City, CA

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%).

[Resources]

Average rainfall in April
Redwood City, CA

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").

[Resources]

Average rainfall days in April
Redwood City, CA

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).

[Resources]

Average sea temperature in April
Redwood City, CA

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).

[Resources]

Average daylight in April /
Average sunshine in April
Redwood City, CA

Average daylight in April / Average sunshine in April - Redwood City, CA
  • Average daylight in April: 13h and 1min

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 2min

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).

[Resources]

Average sunshine days in April
Redwood City, CA

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).

[Resources]

Average UV index in April
Redwood City, CA

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).

[Resources]

Average cloud cover in April
Redwood City, CA

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).

[Resources]

Average visibility in April
Redwood City, CA

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).

[Resources]

Redwood City, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location