January weather forecast
Fallbrook, CA

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Weather in January

January, like December, in Fallbrook, California, is another comfortable winter month, with an average temperature fluctuating between 47.8°F (8.8°C) and 64.8°F (18.2°C).

Temperature

January's weather records an average high-temperature of a still enjoyable 64.8°F (18.2°C), showing little deviation from December. Fallbrook temperatures generally rest at a low of 47.8°F (8.8°C) during the January nights.

Humidity

The average relative humidity in January is 57%.

Rainfall

In Fallbrook, during January, the rain falls for 6.2 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, there are 63.6 rainfall days, and 8.98" (228mm) of precipitation is accumulated.

Daylight

The average length of the day in January in Fallbrook 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 January, the average sunshine 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 health risk from exposure to the Sun's UV radiation for average individuals.
Note: During January, 4 as the daily maximum UV index converts into the following advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Frequently asked questions

What is the average January temperature in Fallbrook?

Fallbrook in January has an average high-temperature of 64.8°F (18.2°C) and an average low-temperature of 47.8°F (8.8°C).

What is the average humidity in January in Fallbrook?

In January, the average relative humidity in Fallbrook, California, is 57%.

How many days does it rain in January in Fallbrook?

In Fallbrook, during January, the rain falls for 6.2 days and regularly aggregates up to 1.14" (29mm) of precipitation.

What is the average length of the day in January in Fallbrook?

In January, the average day length in Fallbrook, California, is 10h and 14min.

When is the sunrise / sunset in January in Fallbrook?

On the first day of January, sunrise is at 6:52 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 5:19 pm PST.

How long on average sun shines in January in Fallbrook?

The average sunshine duration in January in Fallbrook, California, is 6.8h.

What is the UV index intensity in January in Fallbrook?

In January, the average daily maximum UV index in Fallbrook is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Fallbrook, CA

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).

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Average pressure in January
Fallbrook, CA

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).

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Average wind speed in January
Fallbrook, CA

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).

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Average humidity in January
Fallbrook, CA

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%).

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Average rainfall in January
Fallbrook, CA

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").

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Average rainfall days in January
Fallbrook, CA

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).

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Average daylight in January /
Average sunshine in January
Fallbrook, CA

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).

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Average sunshine days in January
Fallbrook, CA

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).

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Average UV index in January
Fallbrook, CA

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).

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Average cloud cover in January
Fallbrook, CA

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).

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Average visibility in January
Fallbrook, CA

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).

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Fallbrook, California, USA

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