January weather forecast
Sunol, CA

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Weather in January

January is a refreshing winter month in Sunol, California, with an average temperature varying between 57°F (13.9°C) and 41.5°F (5.3°C).

Temperature

The arrival of January sees an average high-temperature of a mild 57°F (13.9°C), hardly diverging from December's 55°F (12.8°C). During the month of January, the temperature in Sunol, California, falls to an average of 41.5°F (5.3°C).

Humidity

In January, the average relative humidity is 73%.

Rainfall

In January, in Sunol, the rain falls for 9.3 days. Throughout January, 1.93" (49mm) of precipitation is accumulated. Throughout the year, there are 70.2 rainfall days, and 10.98" (279mm) of precipitation is accumulated.

Daylight

In January, the average length of the day in Sunol is 9h and 55min.
On the first day of January, sunrise is at 7:22 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:29 pm PST.

Sunshine

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

UV index

The months with the lowest UV index in Sunol 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 health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 3 in January, converts into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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Frequently asked questions

What is the average January temperature in Sunol?

The high-temperature, in January, in Sunol, records 57°F (13.9°C), while the low-temperature is 41.5°F (5.3°C).

What is the average humidity in January in Sunol?

In January, the average relative humidity is 73%.

How many days does it rain in January in Sunol?

In Sunol, in January, during 9.3 rainfall days, 1.93" (49mm) of precipitation is typically accumulated.

What is the average length of the day in January in Sunol?

In January, the average day length in Sunol, California, is 9h and 55min.

When is the sunrise / sunset in January in Sunol?

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, in Sunol, California, sunrise is at 7:11 am and sunset at 5:29 pm PST.

How long on average sun shines in January in Sunol?

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

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

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

What is the UV index intensity in January in Sunol?

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

Average temperature in January
Sunol, CA

Average temperature in January - Sunol, 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
Sunol, CA

Average pressure in January - Sunol, 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
Sunol, CA

Average wind speed in January - Sunol, 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
Sunol, CA

Average humidity in January - Sunol, 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
Sunol, CA

Average rainfall in January - Sunol, 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
Sunol, CA

Average rainfall days in January - Sunol, 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
Sunol, CA

Average daylight in January / Average sunshine in January - Sunol, 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
Sunol, CA

Average sunshine days in January - Sunol, 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
Sunol, CA

Average UV index in January - Sunol, 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
Sunol, CA

Average cloud cover in January - Sunol, 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
Sunol, CA

Average visibility in January - Sunol, 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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Sunol, California, USA

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