April weather forecast and climate
O'Brien, CA

Weather in April

April in O'Brien, California, is a comfortable spring month, with average temperature fluctuating between 62.4°F (16.9°C) and 40.3°F (4.6°C).

Temperature

In O'Brien, the average high-temperature marginally rises, from a cool 54.1°F (12.3°C) in March, to a comfortable 62.4°F (16.9°C). The average low-temperature, in O'Brien, is 40.3°F (4.6°C).

Humidity

The average relative humidity is 67%.

Rainfall

In O'Brien, during April, the rain falls for 12.9 days and regularly aggregates up to 2.13" (54mm) of precipitation. In O'Brien, during the entire year, the rain falls for 102.3 days and collects up to 24.21" (615mm) of precipitation.

Snowfall

In O'Brien snow does not fall in April through October.

Daylight

In O'Brien, California, the average length of the day in April is 13.3h.

Sunshine

In O'Brien, the average sunshine is 10.2h.

UV index

In O'Brien, the average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 4 in April transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in April in O'Brien?

In O'Brien, California, in April, the average high-temperature is 62.4°F (16.9°C), and the average low-temperature is 40.3°F (4.6°C).

What is the average humidity in April in O'Brien?

In O'Brien, the average relative humidity in April is 67%.

How many days does it rain in April in O'Brien?

In April, in O'Brien, California, the rain falls for 12.9 days. Throughout April, 2.13" (54mm) of precipitation is accumulated.

Does it snow in O'Brien in April?

In April, in O'Brien, it doesn't snow. March is the latest month when it typically snows.

When it does not snow in O'Brien?

In O'Brien, California, snow does not fall in April through October.

How many hours of daylight does O'Brien have in April?

In April, the average length of the day is 13.3h.

How long on average sun shines in April in O'Brien?

In April, the average sunshine is 10.2h.

What is the UV index reading in April in O'Brien?

The average daily maximum UV index in April in O'Brien, California, is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in April
O'Brien, CA

Average temperature in April - O
  • Average high temperature in April: 62.4°F

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is December (47.8°F).

  • Average low temperature in April: 40.3°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).

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Average pressure in April
O'Brien, CA

Average pressure in April - O
  • Average pressure in April: 30.03"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is August (29.92").

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Average wind speed in April
O'Brien, CA

Average wind speed in April - O
  • Average wind speed in April: 5.2mph

The windiest months (with the highest average wind speed) are March and October (5.3mph).
The calmest months (with the lowest average wind speed) are August and November (4.5mph).

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Average humidity in April
O'Brien, CA

Average humidity in April - O
  • Average humidity in April: 67%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is August (37%).

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Average rainfall in April
O'Brien, CA

Average rainfall in April - O
  • Average rainfall in April: 2.13"

The wettest month (with the highest rainfall) is March (4.8").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in April
O'Brien, CA

Average rainfall days in April - O
  • Average rainfall days in April: 12.9 days

The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is August (1.7 days).

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Average snowfall in April
O'Brien, CA

Average snowfall in April - O
  • Average snowfall in April: 0"

The month with the highest snowfall is November (1.3").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in April
O'Brien, CA

Average snowfall days in April - O
  • Average snowfall days in April: 0 days

The month with the highest number of snowfall days is February (1.9 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in April /
Average sunshine in April
O'Brien, CA

Average daylight in April / Average sunshine in April - O
  • Average daylight in April: 13.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in April: 10.2h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in April
O'Brien, CA

Average sunshine days in April - O
  • Average sunshine days in April: 14.8 days

The month with the most sunshine days is August (27.1 days).
The month with the least sunshine days is March (11.8 days).

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Average UV index in April
O'Brien, CA

Average UV index in April - O
  • Average UV index in April: 4

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are February, November and December (UV index 2).

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Average cloud cover in April
O'Brien, CA

Average cloud cover in April - O
  • Average cloud cover in April: 31

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in April
O'Brien, CA

Average visibility in April - O
  • Average visibility in April: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).

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