January weather forecast and climate
Fontana, CA

Weather in January

January, the same as December, is another enjoyable winter month in Fontana, California, with temperature in the range of an average low of 45.3°F (7.4°C) and an average high of 63.1°F (17.3°C).

Temperature

In January, the average high-temperature is essentially the same as in December - a still comfortable 63.1°F (17.3°C). In January, in Fontana, the average low-temperature is 45.3°F (7.4°C).

Humidity

In January, the average relative humidity is 48%.

Rainfall

In Fontana, in January, it is raining for 5.6 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, in Fontana, there are 48.1 rainfall days, and 6.89" (175mm) of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall.

Daylight

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

Sunshine

In Fontana, the average sunshine in January is 7h.

UV index

The average daily maximum UV index in January is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 4 transform into the following instructions:
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 Fontana?

The average high-temperature, in January, in Fontana, California, is 63.1°F (17.3°C), while the average low-temperature is 45.3°F (7.4°C).

What is the average humidity in January in Fontana?

The average relative humidity in January in Fontana, California, is 48%.

How many days does it rain in January in Fontana?

In January, in Fontana, the rain falls for 5.6 days. Throughout January, 1.02" (26mm) of precipitation is accumulated.

Does it snow in Fontana in January?

In Fontana, in January, it doesn't snow. In February, it regularly snows.

When it does not snow in Fontana?

In Fontana, California, snow does not fall in January, March through December.

How many hours of daylight does Fontana have in January?

In Fontana, California, the average length of the day in January is 10.2h.

How long on average sun shines in January in Fontana?

In January, the average sunshine in Fontana, California, is 7h.

How high is the UV index in January in Fontana?

In Fontana, the average daily maximum UV index in January is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in January
Fontana, CA

Average temperature in January - Fontana, CA
  • Average high temperature in January: 63.1°F

The warmest month (with the highest average high temperature) is August (92.1°F).
The month with the lowest average high temperature is December (60.8°F).

  • Average low temperature in January: 45.3°F

The month with the highest average low temperature is August (67.3°F).
The coldest months (with the lowest average low temperature) are February and December (44.2°F).

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Average pressure in January
Fontana, CA

Average pressure in January - Fontana, CA
  • Average pressure in January: 30.1"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in January
Fontana, CA

Average wind speed in January - Fontana, CA
  • Average wind speed in January: 5.5mph

The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in January
Fontana, CA

Average humidity in January - Fontana, CA
  • Average humidity in January: 48%

Months with the highest relative humidity are February, March and May (52%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in January
Fontana, CA

Average rainfall in January - Fontana, CA
  • Average rainfall in January: 1.02"

The wettest month (with the highest rainfall) is February (1.57").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in January
Fontana, CA

Average rainfall days in January - Fontana, CA
  • Average rainfall days in January: 5.6 days

The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days in January
Fontana, CA

Average snowfall days in January - Fontana, CA
  • Average snowfall days in January: 0 days

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in January / Average sunshine in January - Fontana, 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: 7h

Months with the most sunshine are June, July and August (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.9h).

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Average sunshine days in January
Fontana, CA

Average sunshine days in January - Fontana, CA
  • Average sunshine days in January: 24 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.1 days).

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Average UV index in January
Fontana, CA

Average UV index in January - Fontana, CA
  • Average UV index in January: 4

Months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in January
Fontana, CA

Average cloud cover in January - Fontana, CA
  • Average cloud cover in January: 19

Months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in January
Fontana, CA

Average visibility in January - Fontana, 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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