Gilman (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Gilman.
Climate overview of Gilman
Temperatures in Gilman, Illinois, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while January is the coldest at 0°C (32°F).
Rain/snowfall is high, totalling around 1087 mm (43 in) per year. June is the wettest month and January the driest. The city also experiences warm summers and very cold winters.
Gilman Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Gilman - and find the best time to visit.
Monthly Temperature in Gilman
The climate in Gilman is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in July, the warmest time of the year, to a very cold 0°C (32°F) during cooler months like January.
At night, you can expect temperatures ranging from 17°C (63°F) in July to around -9°C (16°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Gilman
Gilman has a notably wet climate with abundant precipitation, recording 1087 mm (43 in) of rain/snowfall per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, June it receives high rainfall, averaging 144 mm (5.7 in) of precipitation, recorded across 14 rainy days. In contrast, the driest month January brings less snowfall, with 53 mm (2.1 in) over 10 snowy days. For more details, please visit our Gilman 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 Gilman
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: 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 Gilman
What is the best time to visit Gilman?
September typically offers the most optimal weather in Gilman. In contrast, January, February, March and December tend to have less optimal conditions. Gilman has warm summers and very cold winters.
What temperatures can I expect in Gilman?
Daytime highs range from 0°C (32°F) in January to 29°C (84°F) in July. Nighttime lows range from -9°C (16°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Gilman get?
Annual rainfall is around 1087 mm (43 in). June is the wettest month with 144 mm (5.7 in), while January is the driest with 53 mm (2.1 in).
Gilman 3-Day Forecast
Gilman on the map
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