January weather forecastIrvine, CA
January
Weather in January
In contrast to much of the United States during this time, January in Irvine, California is strikingly mild. Temperatures are comfortable, and it is not uncommon to see residents walking around in light sweaters or jackets. The primary force at work during this month is rain, coming down at an average of 1.14" (29mm) as compared to a dryer February. Therefore, this is a period of hydration for the local flora, painting a green and lively picture of this city. A tip for those venturing outdoors: pack a raincoat for potential sudden showers.Temperature
A minimal variation is noted in Irvine's average high-temperature at the onset of January, reaching a still comfortable 64.9°F (18.3°C) from December's 63°F (17.2°C). The average nighttime temperature lowers to a cool 51.8°F (11°C) throughout January.Humidity
In Irvine, the average relative humidity in January is 58%.Rainfall
In Irvine, in January, it is raining for 5.4 days, with typically 1.14" (29mm) of accumulated precipitation. In Irvine, 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 January is 10h and 13min.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 6:48 am and sunset at 5:20 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 value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In January, the maximum UV index of 4 translates into these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
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: 10h and 12min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- 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).
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
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).
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
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).
