January weather forecast and climate
Diablo, CA

Weather in January

January, like December, is a moderate winter month in Diablo, California, with average temperature varying between 56.8°F (13.8°C) and 42.1°F (5.6°C).

Temperature

In Diablo, California, the average high-temperature is relatively the same as in December - a still mild 56.8°F (13.8°C). In Diablo, in January, the average low-temperature is 42.1°F (5.6°C).

Humidity

In January, the average relative humidity is 73%.

Rainfall

In Diablo, during January, the rain falls for 8.8 days and regularly aggregates up to 1.97" (50mm) of precipitation. In Diablo, during the entire year, the rain falls for 65.6 days and collects up to 11.22" (285mm) of precipitation.

Daylight

The average length of the day in Diablo is 9.9h.

Sunshine

In January, the average sunshine is 6.1h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 3 in January interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in January in Diablo?

The average high-temperature, in January, in Diablo, California, is 56.8°F (13.8°C), while the average low-temperature is 42.1°F (5.6°C).

What is the average humidity in January in Diablo?

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

How many days does it rain in January in Diablo?

In Diablo, in January, it is raining for 8.8 days, with typically 1.97" (50mm) of accumulated precipitation.

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

The average length of the day in January in Diablo is 9.9h.

How many hours of sunshine does Diablo have in January?

The average sunshine in January in Diablo, California, is 6.1h.

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

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

What is the UV index reading in January in Diablo?

The average daily maximum UV index in January is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in January
Diablo, CA

Average temperature in January - Diablo, CA
  • Average high temperature in January: 56.8°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (55.8°F).

  • Average low temperature in January: 42.1°F

Months with the highest average low temperature are August and September (56.7°F).
The coldest month (with the lowest average low temperature) is January (42.1°F).

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Average pressure in January
Diablo, CA

Average pressure in January - Diablo, CA
  • Average pressure in January: 30.14"

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

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Average wind speed in January
Diablo, CA

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

The windiest month (with the highest average wind speed) is May (6.9mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).

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Average humidity in January
Diablo, CA

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

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).

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Average rainfall in January
Diablo, CA

Average rainfall in January - Diablo, CA
  • Average rainfall in January: 1.97"

The wettest month (with the highest rainfall) is February (2.36").
The driest months (with the least rainfall) are July and August (0").

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Average rainfall days in January
Diablo, CA

Average rainfall days in January - Diablo, CA
  • Average rainfall days in January: 8.8 days

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.6 days).

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

Average daylight in January / Average sunshine in January - Diablo, CA
  • Average daylight in January: 9.9h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in January: 6.1h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in January
Diablo, CA

Average sunshine days in January - Diablo, CA
  • Average sunshine days in January: 21 days

The month with the most sunshine days is July (30.2 days).
The month with the least sunshine days is March (17.6 days).

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Average UV index in January
Diablo, CA

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

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

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Average cloud cover in January
Diablo, CA

Average cloud cover in January - Diablo, CA
  • Average cloud cover in January: 33

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in January
Diablo, CA

Average visibility in January - Diablo, CA
  • Average visibility in January: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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