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
Fallbrook's weather, upon January's arrival, documents an average high-temperature of a still enjoyable 64.8°F (18.2°C), nearly identical to the prior month. January is noted for a mean low-temperature of 47.8°F (8.8°C).Humidity
In Fallbrook, the average relative humidity in January is 57%.Rainfall
In January, the rain falls for 6.2 days. Throughout January, 1.14" (29mm) of precipitation is accumulated. In Fallbrook, California, during the entire year, the rain falls for 63.6 days and collects up to 8.98" (228mm) of precipitation.Daylight
In January, the average length of the day is 10h and 14min.On the first day of the month, sunrise is at 6:52 am and sunset at 4:52 pm. On the last day of January, in Fallbrook, sunrise is at 6:45 am and sunset at 5:19 pm PST.
Sunshine
In Fallbrook, the average sunshine in January is 6.8h.UV index
The average daily maximum UV index in January is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In January, a regular UV index of 4 translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are January temperatures?
What is the average humidity in January?
How much does it rain in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Fallbrook have in January?
What is the UV index reading in January?
Average temperature in January
Fallbrook, CA
- Average high temperature in January: 64.8°F
The warmest month (with the highest average high temperature) is August (83.3°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 (63°F).
The coldest months (with the lowest average low temperature) are February and December (46.9°F).
Average pressure in January
Fallbrook, 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
Fallbrook, CA
- Average wind speed in January: 4.9mph
The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest month (with the lowest average wind speed) is October (4.3mph).
Average humidity in January
Fallbrook, CA
- Average humidity in January: 57%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is November (55%).
Average rainfall in January
Fallbrook, CA
- Average rainfall in January: 1.14"
The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Fallbrook, CA
- Average rainfall days in January: 6.2 days
The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is June (1.2 days).
Average daylight in January /
Average sunshine in January
Fallbrook, CA
- Average daylight in January: 10h and 1min
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 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
Fallbrook, CA
- Average sunshine days in January: 23.9 days
The month with the most sunshine days is June (25.8 days).
The month with the least sunshine days is February (20 days).
Average UV index in January
Fallbrook, 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
Fallbrook, CA
- Average cloud cover in January: 21
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in January
Fallbrook, 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).
Fallbrook, California, USA
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