Galesburg, IL weather and climate in 2025
Day
23 °C
Night
11 °C
Sea
0 °C
Precipitation
105 mm
in month
Rainy days
12 days
in month
Daylight
14 hours
average
Sunshine
8 hours
average
Humidity
66 %
Day
23 °C
Night
11 °C
Sea
0 °C
Precipitation
105 mm
in month
Rainy days
12 days
in month
Daylight
14 hours
average
Sunshine
8 hours
average
Humidity
66 %
Overview: Galesburg, IL
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Weather overview for Galesburg, IL
Weather overview
Galesburg, IL experiences a range of weather patterns throughout the year, from cold and snowy winters to warm, humid summers. High temperatures in summer can reach an average of 30 °C (85 °F) in July, while in January daytime highs hover around 0 °C (32 °F). During winter, snowfall is common, with chilly nights that can dip below zero. The spring and autumn months bring a mixed bag of weather, with temperatures rising or falling respectively. Rainfall is fairly consistent year-round, with slight peaks in the warmer months, although the area doesn't have a distinct wet season.
January weather
January is characterized by frigid temperatures with daytime highs averaging around 0 °C (32 °F) and nighttime lows sinking to -9 °C (16 °F). With 8 of precipitation, snow is more common than rain. The wind can add a biting chill, averaging 4 m/s this month.
February weather
February continues the cold trend with slight improvements in temperatures - expect average highs of 2 °C (36 °F) and lows around -7 °C (20 °F). There's a tad less precipitation this month, with around 8 expected to be wet or snowy.
March weather
March heralds the start of spring, but temperatures remain cool with daily highs averaging 10 °C (49 °F). Nighttime lows are still brisk at -1 °C (30 °F). An average of 10 see precipitation, so keep an umbrella handy.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.April weather
April in Galesburg, IL brings a pleasant change with an average high temperature of 17 °C (63 °F). However, prepare for showers since accurate forecasts predict rain for 11 this month. Consistent winds averaging 5 m/s may make some days feel cooler.
May weather
May experiences a further increase in temperatures, with average highs of 23 °C (73 °F). Though warmer, Galesburg can see about 12 of rain. Humidity starts to become more noticeable with an average relative humidity of 66 %.
June weather
June marks the beginning of summer with an average high of 28 °C (82 °F). Expect summer storms, as indicated by an average of 11 of rain, although the total rainfall of 110 mm (4.31 in) suggests moderate precipitation.
July weather
July is the peak of summer with the highest temperatures, reaching an average high of 30 °C (85 °F). With 10 of rainfall, thunderstorms are not uncommon. Humidity remains high at 71 %.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.August weather
August slightly cools from July's peak but maintains warmth with average highs of 29 °C (83 °F). Rainfall is still expected on 9, while humidity can make the weather feel warmer than the actual temperatures.
September weather
September signals the start of fall with a noticeable decrease in temperatures, average highs at 25 °C (77 °F). The weather remains unpredictable with an average of 9 experiencing precipitation.
October weather
October's weather in Galesburg, IL sees further cooling with average daytime highs of 18 °C (64 °F). Rain falls on approximately 9, though the total amount of 77 mm (3.03 in) of precipitation suggests moderate rainfall.
November weather
As November arrives, Galesburg, IL braces for the onset of colder weather, with average highs decreasing to 10 °C (49 °F). Precipitation occurs over 9, and with dropping temperatures, snow can begin to appear.
December weather
December brings the start of winter, and with it, cold temperatures averaging highs of 2 °C (35 °F) and lows around -7 °C (20 °F). With 9 of precipitation expected, snow is likely, and holiday preparations should account for potentially slippery conditions.
FAQs
How cold can it get in Galesburg, IL during January at night?
January nights in Galesburg, IL can be quite cold, with an average low of -9 °C (16 °F). It's essential to have proper insulation and heating at home to stay comfortable.
What is the daytime temperature like in Galesburg, IL in February?
In February, Galesburg, IL starts to see a little rise in daytime temperatures with an average high of 2 °C (36 °F), but it's still quite chilly and winter attire is necessary.
Does Galesburg, IL warm up in March?
March sees Galesburg, IL starting to warm up with a respectable average high of 10 °C (49 °F), but nights remain cold. Transitional clothing, with the flexibility to layer, is recommended.
What type of clothing is suitable for the weather in Galesburg, IL during April?
Layered clothing is suitable for April's average high of 17 °C (63 °F) in Galesburg. As for the 11 of rain expected, it's wise to carry a waterproof jacket and keep an extra layer ready for cooler winds.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.How would you describe the weather in Galesburg, IL in May?
May in Galesburg, IL can be described as mild and increasingly warm, with temperatures that are quite pleasant during the day averaging 23 °C (73 °F). A light jacket may still be needed for cooler evenings.
Is June typically hot in Galesburg, IL?
June is typically hot in Galesburg, IL with daytime highs averaging around 28 °C (82 °F), so it's a good idea to dress in light, breathable clothing.
What is the warmest month in Galesburg, IL?
July is typically the warmest month in Galesburg, IL, with average high temperatures reaching 30 °C (85 °F). It's a month for enjoying outdoor summer activities with proper sun protection.
Is August much cooler than July in Galesburg, IL?
August in Galesburg, IL is not much cooler than July, with only a slight dip in average high temperatures to 29 °C (83 °F), meaning summer heat remains.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.What kind of weather should I expect in Galesburg, IL in September?
Expect a mix of warm days and cooler nights in Galesburg, IL during September, with average high temperatures around 25 °C (77 °F). It's a transitional month, so carrying a light jacket is a good idea.
Is October a good time to enjoy outdoor activities in Galesburg, IL?
October can be a great time for outdoor activities in Galesburg, IL, as the average high of 18 °C (64 °F) is quite comfortable, though layering is recommended for variability in temperatures.
How cool does it get in Galesburg, IL during November?
November sees a noticeable drop in temperatures in Galesburg, IL with daytime highs averaging 10 °C (49 °F), requiring heavier clothing and possibly a warm coat.
What are the typical day and night temperatures in Galesburg, IL during December?
Typical day temperatures in December in Galesburg, IL hover around 2 °C (35 °F), while night temperatures can drop to -7 °C (20 °F), so dressing in layers is essential for staying warm.
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.