Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
The commencement of January notes an average high-temperature of a still fresh 54.3°F (12.4°C), exhibiting little difference from the previous month. During January, Island Mountain consistently records a temperature low averaging a frosty 44.8°F (7.1°C).Humidity
In Island Mountain, the average relative humidity in January is 79%.Rainfall
In January, the rain falls for 13 days. Throughout January, 4.8" (122mm) of precipitation is accumulated. Throughout the year, there are 102.7 rainfall days, and 28.78" (731mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
In Island Mountain, the average length of the day in January is 9h and 43min.On the first day of January, sunrise is at 7:35 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:31 pm PST.
Sunshine
In Island Mountain, the average sunshine in January is 5.2h.UV index
January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: An average maximum UV index of 3 in January leads to these recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. When the Sun is at its strongest around midday, find shade and limit exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Island Mountain in January?
What is the average humidity in January?
How much does it rain in January?
When it does not snow?
Does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
How long on average sun shines in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Island Mountain, CA
- Average high temperature in January: 54.3°F
The warmest month (with the highest average high temperature) is September (69.8°F).
The month with the lowest average high temperature is December (53.4°F).
- Average low temperature in January: 44.8°F
The months with the highest average low temperature are July, August and September (54.3°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).
Average pressure in January
Island Mountain, CA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are August and September (29.95"Hg).
Average wind speed in January
Island Mountain, CA
- Average wind speed in January: 7.8mph
The windiest month (with the highest average wind speed) is June (10.6mph).
The calmest months (with the lowest average wind speed) are January and August (7.8mph).
Average humidity in January
Island Mountain, CA
- Average humidity in January: 79%
The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is September (72%).
Average rainfall in January
Island Mountain, CA
- Average rainfall in January: 4.8"
The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in January
Island Mountain, CA
- Average rainfall days in January: 13 days
The month with the highest number of rainy days is March (16.4 days).
The month with the least rainy days is August (1.8 days).
Average snowfall days in January
Island Mountain, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in January /
Average sunshine in January
Island Mountain, CA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 5h and 1min
The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in January
Island Mountain, CA
- Average sunshine days in January: 16.9 days
The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is March (13.1 days).
Average UV index in January
Island Mountain, CA
- Average UV index in January: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in January
Island Mountain, CA
- Average cloud cover in January: 43
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in January
Island Mountain, 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).
Island Mountain, California, USA
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