Galesburg (IL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Galesburg.
Climate overview of Galesburg
Galesburg, Illinois, United States of America, sees big temperature differences between seasons, with July peaking at 29°C (84°F) and January dropping to -1°C (30°F).
The city receives considerable rain/snowfall, with around 1069 mm (42 in) annually. June is the wettest month. The sunniest month is July, with 10.1 hours of sunshine per day on average.
Galesburg Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Galesburg — and find the best time to visit.
Monthly Temperature in Galesburg
Visitors to Galesburg can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in July to a very cold -1°C (30°F) in the coolest month, January.
Nights vary from 18°C (64°F) in July to around -10°C (14°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Galesburg
Galesburg is known for its substantial rain/snowfall, with annual precipitation reaching 1069 mm (42 in). The climate in Galesburg shows significant variation throughout the year. Expect high rainfall in June, the wettest month, with an average of 150 mm (5.9 in) of precipitation over 13 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 40 mm (1.6 in) of snowfall over 8 snowy days. For more details, please visit our Galesburg Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Galesburg
For those who appreciate different seasons, Galesburg serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.1 hours of sunshine daily, and embrace the darker days in December, offering only 3.8 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Galesburg by Month
The relative humidity is high throughout the year in Galesburg.
The city experiences its highest humidity in December, reaching 73%. In April, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Galesburg
The weather does bring rainfall during this period, between 96 mm (3.8 in) and 150 mm (5.9 in). Planning your next adventure but unsure where to go? Our climate tool suggests perfect locations tailored to your preferred weather conditions. Discover your ideal travel destination with our weather planner.
Frequently asked questions about the climate in Galesburg
What is the best time to visit Galesburg?
September typically offers the most optimal weather in Galesburg. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Galesburg?
Daytime highs range from -1°C (30°F) in January to 29°C (84°F) in July. Nighttime lows range from -10°C (14°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Galesburg get?
Annual rainfall is around 1069 mm (42 in). June is the wettest month with 150 mm (5.9 in), while January is the driest with 40 mm (1.6 in).
How sunny is Galesburg?
Galesburg receives around 2,466 hours of sunshine per year. July is the sunniest month with 303 hours, while December is the cloudiest with just 115 hours. Overall, Galesburg enjoys abundant sunshine.
Galesburg 3-Day Forecast
Galesburg (IL) 3-Day Forecast
Galesburg on the map
Galesburg is highlighted — select any city to see its climate.
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