January weather forecastAtwater, CA
January
Weather in January
January, the same as December, in Atwater, California, is another refreshing winter month, with an average temperature fluctuating between 42.1°F (5.6°C) and 58.5°F (14.7°C).Temperature
The arrival of January denotes a barely perceptible change in the average high-temperatures to a still mild 58.5°F (14.7°C) from December's 56.1°F (13.4°C). Atwater observes an average nighttime low-temperature of 42.1°F (5.6°C) during the month of January.Humidity
The most humid month is January, with an average relative humidity of 71%.Rainfall
In Atwater, in January, it is raining for 4.2 days, with typically 0.39" (10mm) of accumulated precipitation. In Atwater, during the entire year, the rain falls for 36.8 days and collects up to 3.03" (77mm) of precipitation.Daylight
In Atwater, the average length of the day in January is 9h and 56min.On the first day of the month, sunrise is at 7:16 am and sunset at 4:55 pm. On the last day of January, sunrise is at 7:06 am and sunset at 5:25 pm PST.
Sunshine
In January, the average sunshine is 6.4h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 3 in January translates into this advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
Average daylight in January /
Average sunshine in January
Atwater, CA
- Average daylight in January: 9h and 54min
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 24min
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).
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).
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).
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).
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).
