January weather forecast and climate
Irvine, CA

The neon-lit city of Irvine in California, with highway lights and the distant hill ranges and skyscape
The neon-lit city of Irvine in California, with highway lights and the distant hill ranges and skyscape
January, like December, in Irvine, California, is another comfortable winter month, with temperature in the range of an average high of 64.9°F (18.3°C) and an average low of 51.8°F (11°C).

Temperature

In January, the average high-temperature is relatively the same as in December - a still enjoyable 64.9°F (18.3°C). In January, in Irvine, the average low-temperature is 51.8°F (11°C).

Humidity

In January, the average relative humidity is 58%.

Rainfall

In Irvine, in January, it is raining for 5.4 days, with typically 1.14" (29mm) of accumulated precipitation. In Irvine, California, during the entire year, the rain falls for 63.7 days and collects up to 7.91" (201mm) of precipitation.

Daylight

The average length of the day in Irvine, California, is 10.2h.

Sunshine

The average sunshine in Irvine, California, 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 in Irvine, California. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In January, the average maximum UV index of 4 translate into the following recommendations:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in January in Irvine?

In Irvine, in January, the average high-temperature is 64.9°F (18.3°C), and the average low-temperature is 51.8°F (11°C).

What is the average humidity in January in Irvine?

The average relative humidity in January is 58%.

How many days does it rain in January in Irvine?

In January, in Irvine, California, the rain falls for 5.4 days. Throughout January, 1.14" (29mm) of precipitation is accumulated.

How many hours of daylight does Irvine have in January?

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

How many hours of sunshine does Irvine have in January?

The average sunshine in January is 6.8h.

What is the month with the lowest UV index in Irvine?

Months with the lowest UV index in Irvine, 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 Irvine?

The average daily maximum UV index in January in Irvine, California, is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in January - Irvine, CA
  • Average high temperature in January: 64.9°F

The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (63°F).

  • Average low temperature in January: 51.8°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).

Average pressure in January - Irvine, CA
  • Average pressure in January: 30.1"

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

Average wind speed in January - Irvine, CA
  • Average wind speed in January: 5.2mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (4.8mph).

Average humidity in January - Irvine, CA
  • Average humidity in January: 58%

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

Average rainfall in January - Irvine, CA
  • Average rainfall in January: 1.14"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.08").

Average rainfall days in January - Irvine, CA
  • Average rainfall days in January: 5.4 days

The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is June (2.2 days).

Average daylight in January / Average sunshine in January - Irvine, 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: 9.9h).

  • 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).

Average sunshine days in January - Irvine, CA
  • Average sunshine days in January: 24.5 days

The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is May (19.7 days).

Average UV index in January - Irvine, 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).

Average cloud cover in January - Irvine, CA
  • Average cloud cover in January: 21

The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).

Average visibility in January - Irvine, 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).