April weather forecast
O'Brien, CA

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Weather in April

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

Temperature

With the onset of April, O'Brien's average high-temperature sees a modest rise, moving from March's fresh 54.1°F (12.3°C) to a refreshing 62.4°F (16.9°C). Despite drastic daytime highs, O'Brien logs an average low-temperature reading of 40.3°F (4.6°C) throughout April.

Humidity

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

Rainfall

In O'Brien, in April, it is raining for 12.9 days, with typically 2.13" (54mm) of accumulated 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

The average length of the day in April in O'Brien, California, is 13h and 20min.
On the first day of April in O'Brien, sunrise is at 6:51 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 8:05 pm PDT.

Sunshine

In April, 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 moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: A daily high UV index of 4 in April leads to these guidelines:
Take necessary precautions - Defending against sun damage is advocated. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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Frequently asked questions

What are the temperatures in O'Brien in April?

The average high-temperature and low-temperature in O'Brien during April are 62.4°F (16.9°C) and 40.3°F (4.6°C) respectively.

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

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

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

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

When it does not snow in O'Brien?

April through October are months without snowfall in O'Brien.

Does it snow in O'Brien in April?

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

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

In O'Brien, the average day length in April is 13h and 20min.

When is the sunrise / sunset in April in O'Brien?

In April, on the first day of the month, sunrise is at 6:51 am and sunset at 7:34 pm. On the last day of the month, in O'Brien, California, sunrise is at 6:07 am and sunset at 8:05 pm PDT.

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

In April, the average sunshine duration in O'Brien, California, is 10.2h.

How high is the UV index in April in O'Brien?

In April, the average daily maximum UV index in O'Brien is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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").
The 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).
The 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: 13h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in April: 10h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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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).
The 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

The 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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O'Brien, California, USA

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