January weather forecast and climate
Placentia, CA

Weather in January

January, the same as December, is another comfortable winter month in Placentia, California, with temperature in the range of an average high of 66.6°F (19.2°C) and an average low of 50.5°F (10.3°C).

Temperature

In Placentia, California, the average high-temperature in January is essentially the same as in December - a still enjoyable 66.6°F (19.2°C). In January, the average low-temperature is 50.5°F (10.3°C).

Humidity

In January, the average relative humidity is 53%.

Rainfall

In Placentia, California, during 5.3 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. Throughout the year, in Placentia, there are 53.2 rainfall days, and 7.72" (196mm) of precipitation is accumulated.

Daylight

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

Sunshine

In January, the average sunshine in Placentia is 6.9h.

UV index

January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in January in Placentia?

In Placentia, in January, the average high-temperature is 66.6°F (19.2°C), and the average low-temperature is 50.5°F (10.3°C).

What is the average humidity in January in Placentia?

The average relative humidity in January is 53%.

How many days does it rain in January in Placentia?

In January, the rain falls for 5.3 days. Throughout January, 1.34" (34mm) of precipitation is accumulated.

How many hours of daylight does Placentia have in January?

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

How long on average sun shines in January in Placentia?

In Placentia, the average sunshine in January is 6.9h.

What are the months with the lowest UV index in Placentia?

January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index.

What is the UV index reading in January in Placentia?

The average daily maximum UV index in January in Placentia is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in January
Placentia, CA

Average temperature in January - Placentia, CA
  • Average high temperature in January: 66.6°F

The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is December (64.2°F).

  • Average low temperature in January: 50.5°F

The month with the highest average low temperature is August (65.7°F).
The coldest month (with the lowest average low temperature) is February (49.6°F).

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Average pressure in January
Placentia, CA

Average pressure in January - Placentia, 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 (29.88").

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Average wind speed in January
Placentia, CA

Average wind speed in January - Placentia, CA
  • Average wind speed in January: 5.1mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in January
Placentia, CA

Average humidity in January - Placentia, CA
  • Average humidity in January: 53%

The month with the highest relative humidity is June (63%).
The month with the lowest relative humidity is November (50%).

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Average rainfall in January
Placentia, CA

Average rainfall in January - Placentia, CA
  • Average rainfall in January: 1.34"

The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in January
Placentia, CA

Average rainfall days in January - Placentia, CA
  • Average rainfall days in January: 5.3 days

The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is June (1.4 days).

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

Average daylight in January / Average sunshine in January - Placentia, 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: 6.9h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.8).

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Average sunshine days in January
Placentia, CA

Average sunshine days in January - Placentia, CA
  • Average sunshine days in January: 24.8 days

The month with the most sunshine days is August (26.7 days).
The month with the least sunshine days is February (20.7 days).

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Average UV index in January
Placentia, CA

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

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

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Average cloud cover in January
Placentia, CA

Average cloud cover in January - Placentia, CA
  • Average cloud cover in January: 20

Months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in January
Placentia, CA

Average visibility in January - Placentia, 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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