Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
Lewiston experiences a minor change to a still cold 37.4°F (3°C) in average high-temperature during January, closely reflecting December. Lewiston's nighttime temperature in January falls to an average of 27°F (-2.8°C).Humidity
With an average relative humidity of 84%, January is the most humid month.Rainfall
In Lewiston, in January, it is raining for 14.5 days, with typically 1.69" (43mm) of accumulated precipitation. Throughout the year, there are 142.4 rainfall days, and 14.21" (361mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Lewiston, in January, during 4.8 snowfall days, 2.56" (65mm) of snow is typically accumulated. In Lewiston, during the entire year, snow falls for 24.2 days and aggregates up to 10.16" (258mm) of snow.Daylight
In Lewiston, the average length of the day in January is 9h and 5min.On the first day of January, sunrise is at 7:31 am and sunset at 4:11 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:50 pm PST.
Sunshine
With an average of 5.1h of sunshine, January has the least sunshine of the year.UV index
In January, the average daily maximum UV index in Lewiston is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold is it in Lewiston in January?
What is the most humid month in Lewiston?
What is the average humidity in January in Lewiston?
How many days does it rain in January in Lewiston?
How many days does it snow in January in Lewiston?
What is the average length of the day in January in Lewiston?
When are sunrise and sunset in January in Lewiston?
What is the month with the least sunshine in Lewiston?
How many hours of sunshine does Lewiston have in January?
How high is the UV index in January in Lewiston?
Average temperature in January
Lewiston, ID
- Average high temperature in January: 37.4°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 (36.1°F).
- Average low temperature in January: 27°F
The month with the highest average low temperature is August (59.2°F).
The coldest month (with the lowest average low temperature) is December (24.4°F).
Average pressure in January
Lewiston, ID
- Average pressure in January: 30.2"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in January
Lewiston, ID
- Average wind speed in January: 5.1mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest months (with the lowest average wind speed) are July, August and September (4.3mph).
Average humidity in January
Lewiston, ID
- Average humidity in January: 84%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (38%).
Average rainfall in January
Lewiston, ID
- Average rainfall in January: 1.69"
The wettest month (with the highest rainfall) is March (1.85").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in January
Lewiston, ID
- Average rainfall days in January: 14.5 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in January
Lewiston, ID
- Average snowfall in January: 2.56"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Lewiston, ID
- Average snowfall days in January: 4.8 days
The month with the highest number of snowfall days is December (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Lewiston, ID
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in January
Lewiston, ID
- Average sunshine days in January: 13.7 days
The month with the most sunshine days is July (24 days).
The months with the least sunshine days are February and March (10.8 days).
Average UV index in January
Lewiston, ID
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in January
Lewiston, ID
- Average cloud cover in January: 47
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in January
Lewiston, ID
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Lewiston, Idaho, USA
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