January weather forecast
Aliso Viejo, CA

Weather in January

January, the same as December, is another enjoyable winter month in Aliso Viejo, California, with an average temperature varying between 50.5°F (10.3°C) and 64.9°F (18.3°C).

Temperature

In Aliso Viejo, the average high-temperature in January is relatively the same as in December - a still comfortable 64.9°F (18.3°C). In Aliso Viejo, the average low-temperature is 50.5°F (10.3°C).

Humidity

The average relative humidity in January in Aliso Viejo, California, is 59%.

Rainfall

In January, in Aliso Viejo, the rain falls for 5.4 days. Throughout January, 0.63" (16mm) of precipitation is accumulated. Throughout the year, in Aliso Viejo, California, there are 66.3 rainfall days, and 5.67" (144mm) of precipitation is accumulated.

Daylight

The average length of the day in January is 10h and 14min.
On the first day of the month, sunrise is at 6:55 am and sunset at 4:53 pm. On the last day of January, sunrise is at 6:47 am and sunset at 5:21 pm PST.

Sunshine

In January, the average sunshine is 6.8h.

UV index

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 4 in January transform into the following instructions:
Take precautions - Protection against sunburn is recommended. 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 Aliso Viejo?

In January, in Aliso Viejo, California, the average high-temperature is 64.9°F (18.3°C), and the average low-temperature is 50.5°F (10.3°C).

What is the average humidity in January in Aliso Viejo?

In January, the average relative humidity in Aliso Viejo, California, is 59%.

How many days does it rain in January in Aliso Viejo?

In Aliso Viejo, in January, during 5.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

What is the average length of the day in January in Aliso Viejo?

The average day length in January in Aliso Viejo is 10h and 14min.

When is the sunrise / sunset in January in Aliso Viejo?

On the first day of January, sunrise is at 6:55 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 5:21 pm PST.

How long on average sun shines in January in Aliso Viejo?

The average sunshine duration in January is 6.8h.

What is the month with the lowest UV index in Aliso Viejo?

The months with the lowest UV index in Aliso Viejo, California, are January through March, November and December, with an average maximum UV index of 4.

What is the UV index reading in January in Aliso Viejo?

The average daily maximum UV index in January in Aliso Viejo, California, is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Aliso Viejo, CA

Average temperature in January - Aliso Viejo, CA
  • Average high temperature in January: 64.9°F

The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (62.8°F).

  • Average low temperature in January: 50.5°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 (49.6°F).

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Average pressure in January
Aliso Viejo, CA

Average pressure in January - Aliso Viejo, CA
  • Average pressure in January: 30.09"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in January
Aliso Viejo, CA

Average wind speed in January - Aliso Viejo, CA
  • Average wind speed in January: 5mph

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.7mph).

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Average humidity in January
Aliso Viejo, CA

Average humidity in January - Aliso Viejo, CA
  • Average humidity in January: 59%

The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (56%).

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Average rainfall in January
Aliso Viejo, CA

Average rainfall in January - Aliso Viejo, CA
  • Average rainfall in January: 0.63"

The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in January
Aliso Viejo, CA

Average rainfall days in January - Aliso Viejo, CA
  • Average rainfall days in January: 5.4 days

The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is June (2.6 days).

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Average daylight in January /
Average sunshine in January
Aliso Viejo, CA

Average daylight in January / Average sunshine in January - Aliso Viejo, CA
  • Average daylight in January: 10h and 14min

The month with the longest days is June (Average daylight: 14h and 21min).
The month with the shortest days is December (Average daylight: 9h and 58min).

  • Average sunshine in January: 6h and 48min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in January
Aliso Viejo, CA

Average sunshine days in January - Aliso Viejo, CA
  • Average sunshine days in January: 24.1 days

The month with the most sunshine days is January (24.1 days).
The month with the least sunshine days is February (19.6 days).

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Average UV index in January
Aliso Viejo, CA

Average UV index in January - Aliso Viejo, CA
  • Average UV index in January: 4

The months with the highest UV index are June, July, August and September (UV index 6).
The 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
Aliso Viejo, CA

Average cloud cover in January - Aliso Viejo, CA
  • Average cloud cover in January: 22

The months with the most cloud cover are March and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 7).

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Average visibility in January
Aliso Viejo, CA

Average visibility in January - Aliso Viejo, 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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