January weather forecast and climate
Lake Forest, CA

Weather in January

January, like December, in Lake Forest, California, is another comfortable winter month, with average temperature varying between 50°F (10°C) and 65.1°F (18.4°C).

Temperature

In January, the average high-temperature is relatively the same as in December - a still enjoyable 65.1°F (18.4°C). The average low-temperature, in January, is 50°F (10°C).

Humidity

In January, the average relative humidity is 57%.

Rainfall

In Lake Forest, it is raining for 5.6 days, with typically 1.3" (33mm) of accumulated precipitation. In Lake Forest, during the entire year, the rain falls for 65.4 days and collects up to 9.17" (233mm) of precipitation.

Daylight

In January, the average length of the day in Lake Forest is 10.2h.

Sunshine

In Lake Forest, California, the average sunshine in January is 6.8h.

UV index

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. 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 Lake Forest?

In Lake Forest, California, in January, the average high-temperature is 65.1°F (18.4°C), and the average low-temperature is 50°F (10°C).

What is the average humidity in January in Lake Forest?

In January, the average relative humidity in Lake Forest is 57%.

How much does it rain in Lake Forest in January?

In January, the rain falls for 5.6 days. Throughout January, 1.3" (33mm) of precipitation is accumulated.

How many hours of daylight does Lake Forest have in January?

In Lake Forest, California, the average length of the day in January is 10.2h.

How many hours of sunshine does Lake Forest have in January?

The average sunshine in January is 6.8h.

When is the lowest UV index in Lake Forest?

Months with the lowest UV index in Lake Forest, California, are January through March, November and December, with an average maximum UV index of 4.

How high is the UV index in January in Lake Forest?

The average daily maximum UV index in January in Lake Forest, California, is 4. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in January
Lake Forest, CA

Average temperature in January - Lake Forest, CA
  • Average high temperature in January: 65.1°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).

  • Average low temperature in January: 50°F

The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure in January
Lake Forest, CA

Average pressure in January - Lake Forest, CA
  • Average pressure in January: 30.1"

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are June and September (29.88").

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Average wind speed in January
Lake Forest, CA

Average wind speed in January - Lake Forest, CA
  • Average wind speed in January: 5mph

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest months (with the lowest average wind speed) are August and September (4.5mph).

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Average humidity in January
Lake Forest, CA

Average humidity in January - Lake Forest, CA
  • Average humidity in January: 57%

Months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).

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Average rainfall in January
Lake Forest, CA

Average rainfall in January - Lake Forest, CA
  • Average rainfall in January: 1.3"

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in January
Lake Forest, CA

Average rainfall days in January - Lake Forest, CA
  • Average rainfall days in January: 5.6 days

The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).

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Average daylight in January /
Average sunshine in January
Lake Forest, CA

Average daylight in January / Average sunshine in January - Lake Forest, CA
  • Average daylight in January: 10.2h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in January: 6.8h

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days in January
Lake Forest, CA

Average sunshine days in January - Lake Forest, CA
  • Average sunshine days in January: 24.2 days

Months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).

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Average UV index in January
Lake Forest, CA

Average UV index in January - Lake Forest, CA
  • Average UV index in January: 4

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in January
Lake Forest, CA

Average cloud cover in January - Lake Forest, CA
  • Average cloud cover in January: 22

Months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in January
Lake Forest, CA

Average visibility in January - Lake Forest, 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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