January weather forecastJamul, CA
January
Weather in January
January, the same as December, is another enjoyable winter month in Jamul, California, with an average temperature fluctuating between 64.6°F (18.1°C) and 47.8°F (8.8°C).Temperature
The introduction of January sees an average high-temperature of a still refreshing 64.6°F (18.1°C), hardly deviating from December. During the nights in January, Jamul experiences a consistent average temperature of 47.8°F (8.8°C).Humidity
In January, the average relative humidity is 54%.Rainfall
In January, in Jamul, the rain falls for 5.7 days. Throughout January, 1.1" (28mm) of precipitation is accumulated. Throughout the year, there are 60.6 rainfall days, and 8.66" (220mm) of precipitation is accumulated.Daylight
The average length of the day in January is 10h and 17min.On the first day of the month, sunrise is at 6:49 am and sunset at 4:52 pm. On the last day of January, sunrise is at 6:42 am and sunset at 5:18 pm PST.
Sunshine
In January, the average sunshine in Jamul, California, is 6.9h.UV index
In January, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 4 during January translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Jamul, CA
- Average high temperature in January: 64.6°F
The warmest month (with the highest average high temperature) is August (84.2°F).
The month with the lowest average high temperature is December (63°F).
- Average low temperature in January: 47.8°F
The month with the highest average low temperature is August (66.2°F).
The coldest months (with the lowest average low temperature) are February and December (47.3°F).
Average pressure in January
Jamul, CA
- Average pressure in January: 30.08"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are June and September (29.87"Hg).
Average wind speed in January
Jamul, CA
- Average wind speed in January: 5mph
The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest months (with the lowest average wind speed) are September and October (4.3mph).
Average humidity in January
Jamul, CA
- Average humidity in January: 54%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).
Average rainfall in January
Jamul, CA
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in January
Jamul, CA
- Average rainfall days in January: 5.7 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.3 days).
Average daylight in January /
Average sunshine in January
Jamul, CA
- Average daylight in January: 10h and 18min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January: 6h and 54min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in January
Jamul, CA
- Average sunshine days in January: 24.5 days
The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is July (20.3 days).
Average UV index in January
Jamul, CA
- Average UV index in January: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in January
Jamul, CA
- Average cloud cover in January: 20
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in January
Jamul, 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).
