April weather forecast and climate
Richmond, CA

Richmond and Golden Gate residential districts as split by the scenic natural park
Richmond and Golden Gate residential districts as split by the scenic natural park

Weather in April

April, like March, in Richmond, California, is another comfortable spring month, with temperature in the range of an average low of 47.8°F (8.8°C) and an average high of 64.9°F (18.3°C).

Temperature

In April, the average high-temperature is relatively the same as in March - a still enjoyable 64.9°F (18.3°C). In Richmond, in April, the average low-temperature is 47.8°F (8.8°C).

Humidity

In April, the average relative humidity is 71%.

Rainfall

In Richmond, during April, the rain falls for 6.4 days and regularly aggregates up to 0.28" (7mm) of precipitation. In Richmond, during the entire year, the rain falls for 64.5 days and collects up to 5.98" (152mm) 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: 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.

Daylight

In April, the average length of the day is 13.2h.

Sunshine

The average sunshine in Richmond is 10.3h.

UV index

April through September, with an average maximum UV index of 5, are months with the highest UV index in Richmond, California. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 5 in April transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in April in Richmond?

In Richmond, California, the average relative humidity in April is 71%.

How many days does it rain in April in Richmond?

In Richmond, during April, the rain falls for 6.4 days and regularly aggregates up to 0.28" (7mm) of precipitation.

What months are the ocean coldest in Richmond?

April through June, with an average ocean temperature of 53.1°F (11.7°C), are months with the coldest seawater in Richmond, California.

How cold is the water in April in Richmond?

In April, the average ocean temperature in Richmond, California, is 53.1°F (11.7°C). Swimming in 53.1°F (11.7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in April in Richmond?

The average length of the day in April in Richmond, California, is 13.2h.

How long on average sun shines in April in Richmond?

The average sunshine in April is 10.3h.

When is the highest UV index in Richmond?

Months with the highest UV index in Richmond are April through September, with an average maximum UV index of 5.

How high is the UV index in April in Richmond?

In April, the average daily maximum UV index in Richmond is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in April
Richmond, CA

Average temperature in April - Richmond, CA
  • Average high temperature in April: 64.9°F

The warmest month (with the highest average high temperature) is September (75.7°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in April: 47.8°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 (44.8°F).

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Average pressure in April
Richmond, CA

Average pressure in April - Richmond, CA
  • Average pressure in April: 30.03"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in April
Richmond, CA

Average wind speed in April - Richmond, CA
  • Average wind speed in April: 7.1mph

The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (5.1mph).

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Average humidity in April
Richmond, CA

Average humidity in April - Richmond, CA
  • Average humidity in April: 71%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (65%).

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Average rainfall in April
Richmond, CA

Average rainfall in April - Richmond, CA
  • Average rainfall in April: 0.28"

The wettest month (with the highest rainfall) is February (1.38").
The driest months (with the least rainfall) are June, July, August and September (0.08").

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Average rainfall days in April
Richmond, CA

Average rainfall days in April - Richmond, CA
  • Average rainfall days in April: 6.4 days

The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is June (2 days).

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Average sea temperature in April
Richmond, CA

Average sea temperature in April - Richmond, 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).

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Average daylight in April /
Average sunshine in April
Richmond, CA

Average daylight in April / Average sunshine in April - Richmond, CA
  • Average daylight in April: 13.2h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in April: 10.3h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in April
Richmond, CA

Average sunshine days in April - Richmond, CA
  • Average sunshine days in April: 22.4 days

The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (18.4 days).

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Average UV index in April
Richmond, CA

Average UV index in April - Richmond, CA
  • Average UV index in April: 5

Months with the highest UV index are April, May, June, July, August and September (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in April
Richmond, CA

Average cloud cover in April - Richmond, CA
  • Average cloud cover in April: 28

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 14).

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Average visibility in April
Richmond, CA

Average visibility in April - Richmond, CA
  • Average visibility in April: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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