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What is the weather like in Ottawa, IllinoisOttawa, Illinois monthly and yearly climate averages.

Ottawa, Illinois Climate Averages

Monthly and yearly weather averages for Ottawa, IllinoisWeather almanac for Ottawa, IL. Ottawa monthly weather averages.
Lat: 41.35N, Lon: 88.84W
Wx Zone: ILZ019Web Search

Helpful Tip: Abbreviated, 7 Day, 14 Day Forecasts. There is a weather forecast for every taste.

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Ottawa Monthly Averages

12 Month Weather Scroll   °F Click to change Ottawa weather to Imperial units.Click to change Ottawa weather to Metric units. °C
January
February
March
April
May
June
July
August
September
October
November
December
Hi 29°F Lo 18°F Hi 32°F Lo 20°F Hi 47°F Lo 33°F Hi 58°F Lo 42°F Hi 70°F Lo 53°F Hi 79°F Lo 61°F Hi 81°F Lo 64°F Hi 80°F Lo 62°F Hi 75°F Lo 56°F Hi 61°F Lo 46°F Hi 47°F Lo 34°F Hi 36°F Lo 25°F
10 mph 10 mph 10 mph 10 mph 9 mph 8 mph 6 mph 6 mph 7 mph 9 mph 10 mph 10 mph
3.4 in 3.5 in 4.9 in 6.8 in 9 in 8.1 in 6.7 in 5.6 in 4.6 in 5.8 in 3.7 in 3.5 in
83% 83% 75% 74% 76% 81% 85% 83% 77% 71% 74% 80%
59% 56% 47% 47% 40% 30% 28% 27% 29% 38% 40% 53%
30.6 in 30.6 in 30.6 in 30.4 in 30.4 in 30.4 in 30.4 in 30.4 in 30.5 in 30.5 in 30.6 in 30.6 in
11 10 12 8 7 7 6 8 12 14 15 13
9 9 16 19 21 21 21 19 14 15 12 11
15 12 5 2 0 0 0 0 0 0 4 10
2 2 1 1 1 3 5 6 4 1 1 2
1 2 3 3 5 5 6 5 4 3 1 1
205 197 263 253 292 322 339 341 314 285 269 239
January
February
March
April
May
June
July
August
September
October
November
December
Hi -2°C Lo -8°C Hi 0°C Lo -7°C Hi 8°C Lo 0°C Hi 15°C Lo 5°C Hi 21°C Lo 12°C Hi 26°C Lo 16°C Hi 27°C Lo 18°C Hi 27°C Lo 16°C Hi 24°C Lo 13°C Hi 16°C Lo 8°C Hi 9°C Lo 1°C Hi 2°C Lo -4°C
16 km/h 16 km/h 16 km/h 16 km/h 14 km/h 12 km/h 10 km/h 10 km/h 12 km/h 15 km/h 16 km/h 15 km/h
87 mm 89 mm 124 mm 173 mm 229 mm 205 mm 169 mm 142 mm 117 mm 147 mm 94 mm 88 mm
83% 83% 75% 74% 76% 81% 85% 83% 77% 71% 74% 80%
59% 56% 47% 47% 40% 30% 28% 27% 29% 38% 40% 53%
1020 mb 1020 mb 1019 mb 1014 mb 1015 mb 1013 mb 1015 mb 1015 mb 1017 mb 1016 mb 1019 mb 1019 mb
11 10 12 8 7 7 6 8 12 14 15 13
9 9 16 19 21 21 21 19 14 15 12 11
15 12 5 2 0 0 0 0 0 0 4 10
2 2 1 1 1 3 5 6 4 1 1 2
1 2 3 3 5 5 6 5 4 3 1 1
205 197 263 253 292 322 339 341 314 285 269 239
Month
Avg. Temperatures
Avg. Wind Speed
Avg. Precipitation
Average Humidity
Avg. Cloud Cover
Barometric Pressure
Average Dry Days
Avg. Precip. Days
Average Snow Days
Average Fog Days
Average UV Index
Avg. Hours of Sun
Averages are based on historical weather data from the past 10 years.

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