January weather forecast and climate
Aliso Viejo, CA

Weather in January

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

Temperature

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

Humidity

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

Rainfall

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

Daylight

In Aliso Viejo, the average length of the day in January is 10.2h.

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 estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Aliso Viejo, in January, 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?

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

How much does it rain in Aliso Viejo in January?

In January, in Aliso Viejo, the rain falls for 5.4 days. Throughout January, 0.63" (16mm) of precipitation is accumulated.

How many hours of daylight does Aliso Viejo have in January?

In Aliso Viejo, the average length of the day in January is 10.2h.

How many hours of sunshine does Aliso Viejo have in January?

The average sunshine in January is 6.8h.

What are the months with the lowest UV index in Aliso Viejo?

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

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 estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.

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"

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

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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: 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
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

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
Aliso Viejo, CA

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

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

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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