January weather forecast
O'Brien, CA

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Weather in January

January is a fresh winter month in O'Brien, California, with an average temperature ranging between max 50.4°F and min 35.2°F.

Temperature

O'Brien experiences an average high-temperature of a fresh 50.4°F in January, subtly different from December's 47.8°F. O'Brien, in January, observes a steady average low-temperature of 35.2°F.

Humidity

In January, the average relative humidity is 75%.

Rainfall

In O'Brien, California, in January, during 11.9 rainfall days, 4.13" of precipitation is typically accumulated. Throughout the year, there are 102.3 rainfall days, and 24.21" of precipitation is accumulated.

Snowfall

Months with snowfall are January through March, November and December. In January, it is snowing for 0.4 days. Throughout January, 0.31" of snow is accumulated. In O'Brien, during the entire year, snow falls for 4.6 days and aggregates up to 4.45" of snow.

Daylight

The average length of the day in January is 9h and 39min.
On the first day of the month, sunrise is at 7:33 am and sunset at 4:52 pm. On the last day of January, in O'Brien, sunrise is at 7:20 am and sunset at 5:25 pm PST.

Sunshine

The average sunshine in January is 5.5h.

UV index

In January, the average daily maximum UV index in O'Brien is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 3 in January translates into the following instructions:
Guard yourself - Avoiding sunburn is suggested. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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FAQ

What is the average January temperature in O'Brien?

O'Brien in January has an average high-temperature of 50.4°F and an average low-temperature of 35.2°F.

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

In January, the average relative humidity in O'Brien is 75%.

How much does it rain in O'Brien in January?

In January, in O'Brien, the rain falls for 11.9 days. Throughout January, 4.13" of precipitation is accumulated.

How many days does it snow in January in O'Brien?

In January, it is snowing for 0.4 days. Throughout January, 0.31" of snow is accumulated.

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

The average day length in January is 9h and 39min.

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

On the first day of January in O'Brien, California, sunrise is at 7:33 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:25 pm PST.

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

The average sunshine duration in January is 5.5h.

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

In O'Brien, the average daily maximum UV index in January is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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 January
O'Brien, CA

Average temperature in January - O
  • Average high temperature in January: 50.4°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 January: 35.2°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 January
O'Brien, CA

Average pressure in January - O
  • Average pressure in January: 30.16"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 January
O'Brien, CA

Average wind speed in January - O
  • Average wind speed in January: 4.7mph

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 January
O'Brien, CA

Average humidity in January - O
  • Average humidity in January: 75%

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 January
O'Brien, CA

Average rainfall in January - O
  • Average rainfall in January: 4.13"

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 January
O'Brien, CA

Average rainfall days in January - O
  • Average rainfall days in January: 11.9 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 January
O'Brien, CA

Average snowfall in January - O
  • Average snowfall in January: 0.31"

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 January
O'Brien, CA

Average snowfall days in January - O
  • Average snowfall days in January: 0.4 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 January /
Average sunshine in January
O'Brien, CA

Average daylight in January / Average sunshine in January - O
  • Average daylight in January: 9h and 4min

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 January: 5h and 3min

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 January
O'Brien, CA

Average sunshine days in January - O
  • Average sunshine days in January: 17.1 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 January
O'Brien, CA

Average UV index in January - O
  • Average UV index in January: 3

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 January
O'Brien, CA

Average cloud cover in January - O
  • Average cloud cover in January: 39

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 January
O'Brien, CA

Average visibility in January - O
  • Average visibility in January: 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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