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 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
At the start of January, La Mesa's average high-temperature reaches a still comfortable 66.2°F (19°C), subtly different from the preceding month. La Mesa in January experiences a low-temperature average of 49.6°F (9.8°C).Humidity
In January, the average relative humidity is 56%.Rainfall
In La Mesa, in January, it is raining for 5.3 days, with typically 0.71" (18mm) of accumulated precipitation. In La Mesa, California, during the entire year, the rain falls for 54.5 days and collects up to 6.57" (167mm) of precipitation.Daylight
In La Mesa, the average length of the day in January is 10h and 17min.On the first day of January, sunrise is at 6:50 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 5:19 pm PST.
Sunshine
The average sunshine in January is 6.8h.UV index
January, February, 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 UV radiation for the ordinary person.Note: The daily high UV index of 4 in January translates into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in January?
What is the average humidity in January?
How much does it rain in January?
How many hours of daylight does La Mesa have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does La Mesa have in January?
What are the months with the lowest UV index in La Mesa?
What is the UV index intensity in January?
Average temperature in January
La Mesa, CA
- Average high temperature in January: 66.2°F
The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is December (64.2°F).
- Average low temperature in January: 49.6°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure in January
La Mesa, CA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in January
La Mesa, CA
- Average wind speed in January: 5mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is October (4.5mph).
Average humidity in January
La Mesa, CA
- Average humidity in January: 56%
The month with the highest relative humidity is May (68%).
The month with the lowest relative humidity is November (55%).
Average rainfall in January
La Mesa, CA
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in January
La Mesa, CA
- Average rainfall days in January: 5.3 days
The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.4 days).
Average daylight in January /
Average sunshine in January
La Mesa, CA
- Average daylight in January: 10h and 2min
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 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in January
La Mesa, CA
- Average sunshine days in January: 24.7 days
The month with the most sunshine days is June (28.1 days).
The month with the least sunshine days is February (21 days).
Average UV index in January
La Mesa, 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, November and December (UV index 4).
Average cloud cover in January
La Mesa, CA
- Average cloud cover in January: 21
The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in January
La Mesa, 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).
La Mesa, California, USA
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