January weather forecast
Pleasanton, CA

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Neon-lit buildings in the CBD of downtown Pleasanton, California
Neon-lit buildings in the CBD of downtown Pleasanton, California

Weather in January

January in Pleasanton, California, is a mild winter month, with temperature in the range of an average low of 41.5°F (5.3°C) and an average high of 57°F (13.9°C).

Temperature

January's climate shows a minor adjustment in average high-temperatures to a moderate 57°F (13.9°C) from December's 55°F (12.8°C). Throughout January nights, Pleasanton registers an average low-temperature of 41.5°F (5.3°C).

Humidity

In Pleasanton, the average relative humidity in January is 73%.

Rainfall

In Pleasanton, in January, during 9.3 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. Throughout the year, in Pleasanton, there are 70.2 rainfall days, and 10.98" (279mm) of precipitation is accumulated.

Daylight

In Pleasanton, the average length of the day in January is 9h and 55min.
On the first day of January in Pleasanton, California, sunrise is at 7:22 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:29 pm PST.

Sunshine

In Pleasanton, the average sunshine in January is 6.3h.

UV index

The months with the lowest UV index in Pleasanton are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: In January, a regular UV index of 3 translates into these guidelines:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Frequently asked questions

What is the average January temperature in Pleasanton?

An average high-temperature, in January, in Pleasanton, is 57°F (13.9°C) and the average low-temperature is 41.5°F (5.3°C).

What is the average humidity in January in Pleasanton?

In January, the average relative humidity in Pleasanton, California, is 73%.

How much does it rain in Pleasanton in January?

In Pleasanton, during January, the rain falls for 9.3 days and regularly aggregates up to 1.93" (49mm) of precipitation.

How many hours of daylight does Pleasanton have in January?

The average day length in January in Pleasanton, California, is 9h and 55min.

When are sunrise and sunset in January in Pleasanton?

In January, on the first day of the month, sunrise is at 7:22 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:29 pm PST.

How long on average sun shines in January in Pleasanton?

The average sunshine duration in January in Pleasanton is 6.3h.

What is the month with the lowest UV index in Pleasanton?

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

What is the UV index intensity in January in Pleasanton?

In Pleasanton, the average daily maximum UV index in January is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Pleasanton, CA

Average temperature in January - Pleasanton, CA
  • Average high temperature in January: 57°F

The warmest month (with the highest average high temperature) is July (85.3°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 August (56.7°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure in January
Pleasanton, CA

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in January
Pleasanton, CA

Average wind speed in January - Pleasanton, CA
  • Average wind speed in January: 4.3mph

The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).

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Average humidity in January
Pleasanton, CA

Average humidity in January - Pleasanton, CA
  • Average humidity in January: 73%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (56%).

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Average rainfall in January
Pleasanton, CA

Average rainfall in January - Pleasanton, CA
  • Average rainfall in January: 1.93"

The wettest month (with the highest rainfall) is February (2.05").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in January
Pleasanton, CA

Average rainfall days in January - Pleasanton, CA
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.9 days).

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

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

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in January: 6h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in January
Pleasanton, CA

Average sunshine days in January - Pleasanton, CA
  • Average sunshine days in January: 20.8 days

The month with the most sunshine days is August (29 days).
The month with the least sunshine days is March (17.6 days).

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Average UV index in January
Pleasanton, CA

Average UV index in January - Pleasanton, 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).

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Average cloud cover in January
Pleasanton, CA

Average cloud cover in January - Pleasanton, CA
  • Average cloud cover in January: 31

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

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Average visibility in January
Pleasanton, CA

Average visibility in January - Pleasanton, 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).

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Pleasanton, California, USA

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