January weather forecast
Atwater, CA

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Weather in January

January, the same as December, in Atwater, California, is another mild winter month, with an average temperature ranging between min 42.1°F (5.6°C) and max 58.5°F (14.7°C).

Temperature

As Atwater welcomes January, the average high-temperature stabilizes at a still moderate 58.5°F (14.7°C), showing little deviation from December's 56.1°F (13.4°C). In Atwater, the average nighttime temperature during January is an icy 42.1°F (5.6°C).

Humidity

January is the most humid month, with an average relative humidity of 71%.

Rainfall

In Atwater, California, during January, the rain falls for 4.2 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, there are 36.8 rainfall days, and 3.03" (77mm) of precipitation is accumulated.

Daylight

The average length of the day in January is 9h and 56min.
On the first day of January in Atwater, sunrise is at 7:16 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:25 pm PST.

Sunshine

The average sunshine in January is 6.4h.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Atwater. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 3 during January translates into the following directions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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Frequently asked questions

What is the average January temperature in Atwater?

January temperatures in Atwater vary between a high-temperature of 58.5°F (14.7°C) and a low-temperature of 42.1°F (5.6°C).

What is the most humid month in Atwater?

With an average relative humidity of 71%, January is the most humid month in Atwater.

What is the average humidity in January in Atwater?

In January, the average relative humidity is 71%.

How much does it rain in Atwater in January?

In January, the rain falls for 4.2 days. Throughout January, 0.39" (10mm) of precipitation is accumulated.

How many hours of daylight does Atwater have in January?

In Atwater, California, the average day length in January is 9h and 56min.

What time are sunrise and sunset in January in Atwater?

In January, on the first day of the month, sunrise is at 7:16 am and sunset at 4:55 pm. On the last day of the month, in Atwater, California, sunrise is at 7:06 am and sunset at 5:25 pm PST.

How many hours of sunshine does Atwater have in January?

In Atwater, the average sunshine duration in January is 6.4h.

When is the lowest UV index in Atwater?

The months with the lowest UV index in Atwater are January, February, November and December, with an average maximum UV index of 3.

How high is the UV index in January in Atwater?

The average daily maximum UV index in January in Atwater, California, is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Atwater, CA

Average temperature in January - Atwater, CA
  • Average high temperature in January: 58.5°F

The warmest month (with the highest average high temperature) is July (98.6°F).
The month with the lowest average high temperature is December (56.1°F).

  • Average low temperature in January: 42.1°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).

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Average pressure in January
Atwater, CA

Average pressure in January - Atwater, CA
  • Average pressure in January: 30.15"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in January
Atwater, CA

Average wind speed in January - Atwater, CA
  • Average wind speed in January: 5mph

The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).

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Average humidity in January
Atwater, CA

Average humidity in January - Atwater, CA
  • Average humidity in January: 71%

The month with the highest relative humidity is January (71%).
The month with the lowest relative humidity is July (34%).

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Average rainfall in January
Atwater, CA

Average rainfall in January - Atwater, CA
  • Average rainfall in January: 0.39"

The wettest months (with the highest rainfall) are March and December (0.55").
The driest months (with the least rainfall) are June, July, August and September (0.04").

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Average rainfall days in January
Atwater, CA

Average rainfall days in January - Atwater, CA
  • Average rainfall days in January: 4.2 days

The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (0.5 days).

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

Average daylight in January / Average sunshine in January - Atwater, CA
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in January: 6h and 2min

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

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Average sunshine days in January
Atwater, CA

Average sunshine days in January - Atwater, CA
  • Average sunshine days in January: 25.8 days

The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is February (23 days).

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Average UV index in January
Atwater, CA

Average UV index in January - Atwater, CA
  • Average UV index in January: 3

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in January
Atwater, CA

Average cloud cover in January - Atwater, CA
  • Average cloud cover in January: 29

The month with the most cloud cover is December (Cloud cover 31).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in January
Atwater, CA

Average visibility in January - Atwater, 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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Atwater, California, USA

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