Calhoun County, Illinois Weather by Month

By | January 3, 2024

Calhoun County, nestled in the southwestern part of Illinois, experiences a climate characterized by distinct seasons. From the chilly winters to the warm summers, each month brings unique weather patterns that influence the daily lives of residents and shape the activities of those exploring this picturesque region.

January: The year begins in Calhoun County with the peak of winter. January sees daytime highs ranging from 30°F to 40°F (-1°C to 4°C) and nighttime lows dropping to around 18°F to 28°F (-8°C to -2°C). This month is typically characterized by chilly temperatures, and occasional snowfall can create a serene winter landscape. It’s a time when residents and visitors alike embrace winter activities, such as sledding or enjoying the tranquility of snow-covered scenery. See for climate and weather in Joliet, Illinois.

February: As February unfolds, winter persists in Calhoun County. Daytime temperatures hover between 34°F and 45°F (1°C to 7°C), while nighttime lows can dip to 21°F to 31°F (-6°C to -1°C). Snowfall is still a possibility, and the landscape maintains its wintry charm. Residents might continue to engage in cold-weather activities, but there’s a sense of anticipation as the days gradually lengthen, hinting at the approaching spring.

March: March marks the transition from winter to spring in Calhoun County. Daytime highs range from 44°F to 56°F (7°C to 13°C), and nighttime lows improve slightly to 29°F to 39°F (-2°C to 4°C). While there might still be remnants of winter, signs of spring become more evident. Trees begin to bud, and early spring flowers make their appearance. Outdoor enthusiasts can start venturing out for activities like hiking or birdwatching.

April: As spring takes hold, April brings milder and more pleasant weather to Calhoun County. Daytime highs range from 54°F to 66°F (12°C to 19°C), and nighttime lows generally stay above freezing, averaging between 38°F and 48°F (3°C to 9°C). This is a delightful time when the landscape bursts into full bloom, with trees and flowers showcasing vibrant colors. It’s an ideal period for outdoor activities, from picnics to exploring nature trails.

May: May ushers in warmer temperatures and the full bloom of spring. Daytime highs range from 64°F to 76°F (18°C to 24°C), while nighttime lows comfortably stay in the 48°F to 58°F (9°C to 14°C) range. The increased warmth encourages outdoor pursuits such as fishing, boating, and hiking. May is also characterized by longer days, providing ample daylight for residents and visitors to enjoy the extended evenings.

June: Summer officially arrives in June, bringing warmer and more consistent temperatures. Daytime highs range from 74°F to 86°F (23°C to 30°C), with nighttime lows in the 58°F to 68°F (14°C to 20°C) range. The region experiences longer days, providing plenty of time for recreational activities. June is a popular month for outdoor events, family gatherings, and enjoying the natural beauty of the county.

July: July is characterized by warm summer temperatures in Calhoun County, with daytime highs ranging from 78°F to 90°F (26°C to 32°C). Nighttime lows generally stay between 62°F and 72°F (17°C to 22°C). This month is synonymous with the peak of summer, attracting residents and tourists to outdoor activities, festivals, and the scenic spots along the Mississippi and Illinois rivers.

August: August maintains the warmth of summer, with daytime highs ranging from 77°F to 88°F (25°C to 31°C) and nighttime lows in the 61°F to 71°F (16°C to 22°C) range. The region continues to bask in the summer sun, making it an ideal time for water-based activities, such as kayaking or enjoying a leisurely day by the river. August marks the final stretch of summer, and residents savor the warmth before the transition to fall.

September: As summer transitions to fall, September brings milder temperatures. Daytime highs range from 69°F to 80°F (21°C to 27°C), and nighttime lows dip to 53°F to 63°F (12°C to 17°C). The landscape begins to reflect the changing season, with leaves taking on hues of red, orange, and yellow. September is a pleasant month for outdoor activities, and the county’s natural beauty is on full display.

October: Fall takes center stage in October, with daytime highs ranging from 58°F to 69°F (14°C to 21°C) and nighttime lows dropping to 42°F to 52°F (6°C to 11°C). The fall foliage reaches its peak, creating a stunning backdrop for residents and visitors alike. Outdoor activities include hiking through trails adorned with vibrant leaves and enjoying the crisp autumn air.

November: November marks the transition from fall to winter in Calhoun County. Daytime highs range from 46°F to 57°F (8°C to 14°C), and nighttime lows dip to 32°F to 42°F (0°C to 6°C). The county experiences a gradual cooling, and occasional frost signals the approach of winter. Residents prepare for colder temperatures, and some outdoor activities may shift to those suited for the brisk weather.

December: Winter returns in full force in December, with daytime highs ranging from 33°F to 43°F (1°C to 6°C) and nighttime lows dropping to 19°F to 29°F (-7°C to -2°C). The region is often coated in a layer of snow, creating a festive atmosphere. December is a time for holiday celebrations, winter sports, and cozy gatherings as residents embrace the colder weather and the spirit of the season.

In summary, Calhoun County, Illinois, offers a diverse climate with distinct seasons, each contributing to the unique charm of this region. From the snowy winters that beckon winter enthusiasts to the warm summers ideal for outdoor activities, Calhoun County provides a rich tapestry of experiences for those exploring the area throughout the year.

Calhoun County, Illinois