Ottawa (IL) Climate by Month
Ottawa experiences great temperature shifts.
The city's weather can transition from warm days
to very cold weather.
It also has a notably wet climate with much precipitation.
Now, let’s break down all the climate details for a clearer picture.
Average day and night temperature
The climate in Ottawa is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures range from a comfortable 29°C in July, the warmest time of the year, to a very cold -1°C during cooler months like January. At night, temperatures typically average around -10°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Ottawa has a notably wet climate with abundant precipitation, recording 1008 mm of rain/snowfall per year. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, June receives high rainfall, averaging 129 mm of precipitation, recorded across 13 rainy days. In contrast, the drier season, January brings less snowfall, with 46 mm over 10 snowy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
The best time of year to visit Ottawa in the United States of America
During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
The coldest season / winter is in the following months: January, February and December.
July has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of -1°C.
June tops the wettest month list with 129 mm of rainfall.
January is the driest month with 46 mm of precipitation.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
