Macomb (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Macomb.
Climate overview of Macomb
Macomb, Illinois, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 29°C (84°F) in July, while winters cool to 1°C (34°F) in January.
The city has a wet climate, receiving around 1042 mm (41 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and very cold winters. June is the wettest month.
Macomb Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Macomb - and find the best time to visit.
Monthly Temperature in Macomb
Depending on the time of the year, temperatures range from comfortable to very cold in Macomb. On average, daytime temperatures range from a comfortable 29°C (84°F) in July to a very cold 1°C (34°F) in January.
Nighttime temperatures range from 18°C (64°F) in July to -9°C (16°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Macomb
Macomb has a relatively rain/snowy climate with high precipitation levels, averaging 1042 mm (41 in) of rain/snowfall annually. The seasons in Macomb bring significant changes in precipitation. The wettest month, June, receives high rainfall, with an average of 152 mm (6 in) of precipitation. This rainfall is distributed across 13 rainy days.
In contrast, the driest month, January, experiences much less snowfall, totaling 41 mm (1.6 in) over 8 snowy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Macomb Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Macomb
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: August and September
- Warmest weather: June, July and August
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -9°C (16°F).
Frequently asked questions about the climate in Macomb
What is the best time to visit Macomb?
August and September typically offer the most optimal weather in Macomb. In contrast, January, February and December tend to have less optimal conditions. Macomb has warm summers and very cold winters.
What temperatures can I expect in Macomb?
Daytime highs range from 1°C (34°F) in January to 29°C (84°F) in July. Nighttime lows range from -9°C (16°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Macomb get?
Annual rainfall is around 1042 mm (41 in). June is the wettest month with 152 mm (6 in), while January is the driest with 41 mm (1.6 in).
Macomb 3-Day Forecast
Macomb (IL) 3-Day Forecast
Macomb on the map
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