January weather forecast
Oakley, CA

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Weather in January

January in Oakley, California, is a moderate winter month, with an average temperature fluctuating between 56.1°F (13.4°C) and 41.5°F (5.3°C).

Temperature

The arrival of January sees an average high-temperature of a mild 56.1°F (13.4°C), hardly diverging from December's 55°F (12.8°C). The average temperature in Oakley drops to a cold 41.5°F (5.3°C) during the night in the month of January.

Humidity

With an average relative humidity of 74%, January is the most humid month.

Rainfall

In Oakley, during January, the rain falls for 8.6 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, in Oakley, there are 62 rainfall days, and 10.16" (258mm) of precipitation is accumulated.

Snowfall

January through November are months without snowfall in Oakley.

Daylight

The average length of the day in January is 9h and 53min.
On the first day of the month, sunrise is at 7:22 am and sunset at 4:57 pm. On the last day of January, sunrise is at 7:12 am and sunset at 5:28 pm PST.

Sunshine

In Oakley, the average sunshine in January is 6h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 3 in January translates into these instructions:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.

Frequently asked questions

What is the temperature in January in Oakley?

In Oakley, 56.1°F (13.4°C) is the average high-temperature and 41.5°F (5.3°C) is the average low-temperature during January.

What is the most humid month in Oakley?

With an average relative humidity of 74%, January is the most humid month in Oakley.

What is the average humidity in January in Oakley?

The average relative humidity in January is 74%.

How much does it rain in Oakley in January?

In Oakley, in January, it is raining for 8.6 days, with typically 1.89" (48mm) of accumulated precipitation.

When it does not snow in Oakley?

January through November are months without snowfall in Oakley.

Does it snow in Oakley in January?

In January, in Oakley, it doesn't snow. December is the latest month when it typically snows.

How many hours of daylight does Oakley have in January?

The average day length in January in Oakley is 9h and 53min.

When is the sunrise / sunset in January in Oakley?

On the first day of January, sunrise is at 7:22 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:28 pm PST.

How long on average sun shines in January in Oakley?

In Oakley, the average sunshine duration in January is 6h.

What are the months with the lowest UV index in Oakley?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.

What is the UV index reading in January in Oakley?

In Oakley, the average daily maximum UV index in January is 3. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Oakley, CA

Average temperature in January - Oakley, CA
  • Average high temperature in January: 56.1°F

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in January: 41.5°F

The month with the highest average low temperature is September (57.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

Average pressure in January
Oakley, CA

Average pressure in January - Oakley, CA
  • Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in January
Oakley, CA

Average wind speed in January - Oakley, CA
  • Average wind speed in January: 4.5mph

The windiest month (with the highest average wind speed) is June (7.8mph).
The calmest months (with the lowest average wind speed) are January and November (4.5mph).

Average humidity in January
Oakley, CA

Average humidity in January - Oakley, CA
  • Average humidity in January: 74%

The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is September (52%).

Average rainfall in January
Oakley, CA

Average rainfall in January - Oakley, CA
  • Average rainfall in January: 1.89"

The wettest month (with the highest rainfall) is February (2.09").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in January
Oakley, CA

Average rainfall days in January - Oakley, CA
  • Average rainfall days in January: 8.6 days

The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (0.8 days).

Average snowfall days in January
Oakley, CA

Average snowfall days in January - Oakley, CA
  • Average snowfall days in January: 0 days

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

Average daylight in January /
Average sunshine in January
Oakley, CA

Average daylight in January / Average sunshine in January - Oakley, CA
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in January: 6h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

Average sunshine days in January
Oakley, CA

Average sunshine days in January - Oakley, CA
  • Average sunshine days in January: 21.8 days

The month with the most sunshine days is August (29.8 days).
The month with the least sunshine days is March (17.7 days).

Average UV index in January
Oakley, CA

Average UV index in January - Oakley, CA
  • Average UV index in January: 3

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in January
Oakley, CA

Average cloud cover in January - Oakley, CA
  • Average cloud cover in January: 34

The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).

Average visibility in January
Oakley, CA

Average visibility in January - Oakley, CA
  • Average visibility in January: 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).

Oakley, California, USA

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