January weather forecast
Sun Valley, CA

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Weather in January

January, the same as December, is another refreshing winter month in Sun Valley, California, with an average temperature fluctuating between 47.5°F (8.6°C) and 63.5°F (17.5°C).

Temperature

The high-temperature average in January for Sun Valley is a still refreshing 63.5°F (17.5°C), staying closely aligned with December's conditions. Throughout January nights, Sun Valley experiences a consistent temperature average of 47.5°F (8.6°C).

Humidity

In January, the average relative humidity in Sun Valley is 52%.

Rainfall

In January, in Sun Valley, California, the rain falls for 4.1 days. Throughout January, 0.94" (24mm) of precipitation is accumulated. Throughout the year, there are 40.1 rainfall days, and 5.87" (149mm) of precipitation is accumulated.

Daylight

The average length of the day in January in Sun Valley, California, is 10h and 11min.
On the first day of January in Sun Valley, sunrise is at 6:59 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 5:22 pm PST.

Sunshine

The months with the least sunshine are January, February and December, with an average of 6.9h of sunshine.

UV index

The average daily maximum UV index in January is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 4 during January translates into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Around midday, solar radiation is most harmful; hence, exposure should be limited. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
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Frequently asked questions

What is the average January temperature in Sun Valley?

In January, in Sun Valley, the average high-temperature is 63.5°F (17.5°C), and the average low-temperature is 47.5°F (8.6°C).

What is the average humidity in January in Sun Valley?

In Sun Valley, California, the average relative humidity in January is 52%.

How much does it rain in Sun Valley in January?

In January, the rain falls for 4.1 days. Throughout January, 0.94" (24mm) of precipitation is accumulated.

What is the average length of the day in January in Sun Valley?

The average day length in January is 10h and 11min.

When is the sunrise / sunset in January in Sun Valley?

In January, on the first day of the month, sunrise is at 6:59 am and sunset at 4:54 pm. On the last day of the month, in Sun Valley, California, sunrise is at 6:51 am and sunset at 5:22 pm PST.

What are the months with the least sunshine in Sun Valley?

The months with the least sunshine are January, February and December, with an average of 6.9h of sunshine.

How many hours of sunshine does Sun Valley have in January?

In January, the average sunshine duration in Sun Valley, California, is 6.9h.

How high is the UV index in January in Sun Valley?

In January, the average daily maximum UV index in Sun Valley is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from 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
Sun Valley, CA

Average temperature in January - Sun Valley, CA
  • Average high temperature in January: 63.5°F

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in January: 47.5°F

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.2°F).

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Average pressure in January
Sun Valley, CA

Average pressure in January - Sun Valley, CA
  • Average pressure in January: 30.11"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in January
Sun Valley, CA

Average wind speed in January - Sun Valley, CA
  • Average wind speed in January: 5.7mph

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in January
Sun Valley, CA

Average humidity in January - Sun Valley, CA
  • Average humidity in January: 52%

The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (48%).

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Average rainfall in January
Sun Valley, CA

Average rainfall in January - Sun Valley, CA
  • Average rainfall in January: 0.94"

The wettest month (with the highest rainfall) is December (1.18").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in January
Sun Valley, CA

Average rainfall days in January - Sun Valley, CA
  • Average rainfall days in January: 4.1 days

The month with the highest number of rainy days is March (5.2 days).
The month with the least rainy days is June (1 days).

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Average daylight in January /
Average sunshine in January
Sun Valley, CA

Average daylight in January / Average sunshine in January - Sun Valley, CA
  • Average daylight in January: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in January: 6h and 5min

The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).

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Average sunshine days in January
Sun Valley, CA

Average sunshine days in January - Sun Valley, CA
  • Average sunshine days in January: 25.9 days

The month with the most sunshine days is October (27.1 days).
The month with the least sunshine days is February (22.9 days).

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Average UV index in January
Sun Valley, CA

Average UV index in January - Sun Valley, CA
  • Average UV index in January: 4

The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in January
Sun Valley, CA

Average cloud cover in January - Sun Valley, CA
  • Average cloud cover in January: 20

The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in January
Sun Valley, CA

Average visibility in January - Sun Valley, 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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Sun Valley, California, USA

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