January weather forecast and climate
Fountain Valley, CA

Weather in January

January, like December, in Fountain Valley, California, is another enjoyable winter month, with temperature in the range of an average low of 52.9°F (11.6°C) and an average high of 64.6°F (18.1°C).

Temperature

In January, the average high-temperature is essentially the same as in December - a still comfortable 64.6°F (18.1°C). In January, the average low-temperature is 52.9°F (11.6°C).

Humidity

In January, the average relative humidity is 59%.

Rainfall

In Fountain Valley, during 5.5 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 59.1 rainfall days, and 8.86" (225mm) of precipitation is accumulated.

Daylight

The average length of the day in January is 10.2h.

Sunshine

In Fountain Valley, the average sunshine is 6.8h.

UV index

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: In January, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in January in Fountain Valley?

In January, in Fountain Valley, California, the average high-temperature is 64.6°F (18.1°C), and the average low-temperature is 52.9°F (11.6°C).

What is the average humidity in January in Fountain Valley?

In Fountain Valley, California, the average relative humidity in January is 59%.

How many days does it rain in January in Fountain Valley?

In Fountain Valley, California, in January, it is raining for 5.5 days, with typically 1.54" (39mm) of accumulated precipitation.

What is the average length of the day in January in Fountain Valley?

In Fountain Valley, the average length of the day in January is 10.2h.

How many hours of sunshine does Fountain Valley have in January?

In January, the average sunshine in Fountain Valley is 6.8h.

What are the months with the lowest UV index in Fountain Valley?

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4.

What is the UV index intensity in January in Fountain Valley?

In Fountain Valley, California, the average daily maximum UV index in January is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in January
Fountain Valley, CA

Average temperature in January - Fountain Valley, CA
  • Average high temperature in January: 64.6°F

The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (62.6°F).

  • Average low temperature in January: 52.9°F

The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (51.8°F).

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Average pressure in January
Fountain Valley, CA

Average pressure in January - Fountain Valley, CA
  • Average pressure in January: 30.1"

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are June and September (29.89").

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Average wind speed in January
Fountain Valley, CA

Average wind speed in January - Fountain Valley, CA
  • Average wind speed in January: 5.4mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (5.2mph).

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Average humidity in January
Fountain Valley, CA

Average humidity in January - Fountain Valley, CA
  • Average humidity in January: 59%

The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (56%).

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Average rainfall in January
Fountain Valley, CA

Average rainfall in January - Fountain Valley, CA
  • Average rainfall in January: 1.54"

The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in January
Fountain Valley, CA

Average rainfall days in January - Fountain Valley, CA
  • Average rainfall days in January: 5.5 days

The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is August (2.1 days).

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Average daylight in January /
Average sunshine in January
Fountain Valley, CA

Average daylight in January / Average sunshine in January - Fountain Valley, CA
  • Average daylight in January: 10.2h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in January: 6.8h

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days in January
Fountain Valley, CA

Average sunshine days in January - Fountain Valley, CA
  • Average sunshine days in January: 23.9 days

The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is February (20 days).

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Average UV index in January
Fountain Valley, CA

Average UV index in January - Fountain Valley, CA
  • Average UV index in January: 4

Months with the highest UV index are July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in January
Fountain Valley, CA

Average cloud cover in January - Fountain Valley, CA
  • Average cloud cover in January: 21

Months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).

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Average visibility in January
Fountain Valley, CA

Average visibility in January - Fountain Valley, CA
  • Average visibility in January: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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