January weather forecastOttawa, IL
January
Weather in January
January, the same as December, in Ottawa, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 17.2°F (-8.2°C) and 29.1°F (-1.6°C).Temperature
In Ottawa, January is the coldest month, with temperatures averaging a high of 29.1°F (-1.6°C) and a low of 17.2°F (-8.2°C).Humidity
In Ottawa, the average relative humidity in January is 83%.Rainfall
In Ottawa, during January, the rain falls for 6.5 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, in Ottawa, there are 166.3 rainfall days, and 35.35" (898mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In January, it is snowing for 12.9 days. Throughout January, 4.65" (118mm) of snow is accumulated. In Ottawa, during the entire year, snow falls for 43.4 days and aggregates up to 17.76" (451mm) of snow.Daylight
In Ottawa, the average length of the day in January is 9h and 36min.On the first day of January, sunrise is at 7:21 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:09 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 3.9h of sunshine.UV index
The months with the lowest UV index in Ottawa are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 1 in January leads to these recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Ottawa, IL
- Average high temperature in January: 29.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in January: 17.2°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in January
Ottawa, IL
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Ottawa, IL
- Average wind speed in January: 10.1mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in January
Ottawa, IL
- Average humidity in January: 83%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Ottawa, IL
- Average rainfall in January: 1.85"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days in January
Ottawa, IL
- Average rainfall days in January: 6.5 days
The month with the highest number of rainy days is July (19.9 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in January
Ottawa, IL
- Average snowfall in January: 4.65"
The month with the highest snowfall is February (5.08").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Ottawa, IL
- Average snowfall days in January: 12.9 days
The month with the highest number of snowfall days is January (12.9 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
Ottawa, IL
- Average daylight in January: 9h and 36min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 3h and 54min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in January
Ottawa, IL
- Average sunshine days in January: 13.2 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (7.2 days).
Average UV index in January
Ottawa, IL
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Ottawa, IL
- Average cloud cover in January: 59
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in January
Ottawa, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
