January weather forecast
Rancho Cucamonga, CA

Weather in January

January, the same as December, is another comfortable winter month in Rancho Cucamonga, California, with an average temperature fluctuating between 64°F (17.8°C) and 46.2°F (7.9°C).

Temperature

In January, the average high-temperature is essentially the same as in December - a still enjoyable 64°F (17.8°C). In January, in Rancho Cucamonga, the average low-temperature is 46.2°F (7.9°C).

Humidity

The average relative humidity in January is 49%.

Rainfall

In Rancho Cucamonga, it is raining for 4.6 days, with typically 0.51" (13mm) of accumulated precipitation. Throughout the year, there are 42.3 rainfall days, and 4.53" (115mm) of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall.

Daylight

In January, the average length of the day is 10h and 11min.
On the first day of January in Rancho Cucamonga, sunrise is at 6:56 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 5:19 pm PST.

Sunshine

The average sunshine in January in Rancho Cucamonga is 7h.

UV index

In January, the average daily maximum UV index in Rancho Cucamonga is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in January in Rancho Cucamonga?

The average relative humidity in January in Rancho Cucamonga is 49%.

How many days does it rain in January in Rancho Cucamonga?

In Rancho Cucamonga, in January, during 4.6 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

When it does not snow in Rancho Cucamonga?

January, March through December are months without snowfall.

Does it snow in Rancho Cucamonga in January?

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

How many hours of daylight does Rancho Cucamonga have in January?

In January, the average day length in Rancho Cucamonga is 10h and 11min.

When are sunrise and sunset in January in Rancho Cucamonga?

On the first day of January in Rancho Cucamonga, California, sunrise is at 6:56 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 5:19 pm PST.

How many hours of sunshine does Rancho Cucamonga have in January?

In Rancho Cucamonga, California, the average sunshine duration in January is 7h.

How high is the UV index in January in Rancho Cucamonga?

The average daily maximum UV index in January in Rancho Cucamonga is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Rancho Cucamonga, CA

Average temperature in January - Rancho Cucamonga, CA
  • Average high temperature in January: 64°F

The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in January: 46.2°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).

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Average pressure in January
Rancho Cucamonga, CA

Average pressure in January - Rancho Cucamonga, CA
  • Average pressure in January: 30.1"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in January
Rancho Cucamonga, CA

Average wind speed in January - Rancho Cucamonga, CA
  • Average wind speed in January: 5.3mph

The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in January
Rancho Cucamonga, CA

Average humidity in January - Rancho Cucamonga, CA
  • Average humidity in January: 49%

The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in January
Rancho Cucamonga, CA

Average rainfall in January - Rancho Cucamonga, CA
  • Average rainfall in January: 0.51"

The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in January
Rancho Cucamonga, CA

Average rainfall days in January - Rancho Cucamonga, CA
  • Average rainfall days in January: 4.6 days

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).

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Average snowfall days in January
Rancho Cucamonga, CA

Average snowfall days in January - Rancho Cucamonga, CA
  • Average snowfall days in January: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The 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
Rancho Cucamonga, CA

Average daylight in January / Average sunshine in January - Rancho Cucamonga, CA
  • Average daylight in January: 10h and 11min

The month with the longest days is June (Average daylight: 14h and 23min).
The month with the shortest days is December (Average daylight: 9h and 56min).

  • Average sunshine in January: 7h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

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Average sunshine days in January
Rancho Cucamonga, CA

Average sunshine days in January - Rancho Cucamonga, CA
  • Average sunshine days in January: 25.8 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).

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Average UV index in January
Rancho Cucamonga, CA

Average UV index in January - Rancho Cucamonga, CA
  • Average UV index in January: 4

The 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
Rancho Cucamonga, CA

Average cloud cover in January - Rancho Cucamonga, CA
  • Average cloud cover in January: 19

The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in January
Rancho Cucamonga, CA

Average visibility in January - Rancho Cucamonga, 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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