Climate and monthly weather forecastGalesburg, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Galesburg, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 17.4°F (-8.1°C) and 29.5°F (-1.4°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 29.5°F (-1.4°C) and a low of 17.4°F (-8.1°C). Weather in January »Weather in February
The last month of the winter, February, is an icy month in Galesburg, Illinois, with an average temperature varying between 21.2°F (-6°C) and 34.7°F (1.5°C). The average high-temperature during February registers at a cold 34.7°F (1.5°C), maintaining a close resemblance to the previous month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Galesburg, Illinois, with an average temperature varying between 48°F (8.9°C) and 32.9°F (0.5°C). Galesburg's March weather brings a rise in high-temperatures, moving from a cold 34.7°F (1.5°C) in February to a frosty 48°F (8.9°C). Weather in March »Weather in April
April in Galesburg, Illinois, is a mild spring month, with temperature in the range of an average low of 43.2°F (6.2°C) and an average high of 59.9°F (15.5°C). Galesburg's weather in April shows a rise in the average high-temperature, moving up from March's frosty 48°F (8.9°C) to a moderate 59.9°F (15.5°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Galesburg, Illinois, with an average temperature ranging between min 54°F (12.2°C) and max 70.7°F (21.5°C). May brings a temperature increase, with average high-temperatures moving from April's refreshing 59.9°F (15.5°C) to a pleasant 70.7°F (21.5°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Galesburg, Illinois, with temperature in the range of an average low of 62.4°F (16.9°C) and an average high of 79.2°F (26.2°C). The transition from May to June brings a subtle temperature rise, with average high-temperatures increasing from an agreeable 70.7°F (21.5°C) to a moderately hot 79.2°F (26.2°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Galesburg, Illinois, with an average temperature fluctuating between 81.1°F (27.3°C) and 64.9°F (18.3°C). Galesburg's warmest temperatures are experienced in July, with average high temperatures of 81.1°F (27.3°C) and lows of 64.9°F (18.3°C). For July, the heat index is estimated at a hot 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in Galesburg, is also a moderately hot month, with an average temperature fluctuating between 80.6°F (27°C) and 63.3°F (17.4°C). In August, Galesburg experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 81.1°F (27.3°C) in July to a still moderately hot 80.6°F (27°C). Weather in August »Weather in September
September, the first month of the autumn in Galesburg, is also a moderately hot month, with an average temperature varying between 75.6°F (24.2°C) and 56.3°F (13.5°C). With the onset of September, Galesburg's average high-temperature clocks in at a still warm 75.6°F (24.2°C), showing a minor fluctuation from the previous month. Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in Galesburg, Illinois, with temperature in the range of an average high of 61.5°F (16.4°C) and an average low of 45.7°F (7.6°C). Galesburg's progression into October involves a drop in the average high-temperature, receding from a moderately hot 75.6°F (24.2°C) in September to an enjoyable 61.5°F (16.4°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Galesburg, Illinois, with an average temperature varying between 47.5°F (8.6°C) and 33.8°F (1°C). A subtle decrease in the average high-temperature marks November, falling from October's comfortable 61.5°F (16.4°C) to a frosty 47.5°F (8.6°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Galesburg, Illinois, with an average temperature ranging between min 24.6°F (-4.1°C) and max 35.4°F (1.9°C). December's arrival coincides with a drop in the average high-temperature, decreasing from November's chilly 47.5°F (8.6°C) to a cold 35.4°F (1.9°C). Weather in December »Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the coldest month, with an average high-temperature of 29.5°F (-1.4°C) and an average low-temperature of 17.4°F (-8.1°C).
January and December are months with the least rain in Galesburg, Illinois, when the rain falls for 4 days and typically aggregates up to 0.47" (12mm) of rain.
In Galesburg, during the entire year, the rain falls for 109.9 days and collects up to 11.14" (283mm) of precipitation.
January through April, October through December are months with snowfall.
January is the month with the most snowfall. Snow falls for 8.8 days and accumulates 1.38" (35mm) of snow.
In Galesburg, during the entire year, snow falls for 28 days and aggregates up to 4.53" (115mm) of snow.
The month with the least sunshine is January, with an average of 4h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Galesburg, Illinois, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
The month with the most rainfall in Galesburg, Illinois, is May, when the rain falls for 15.2 days and typically aggregates up to 1.65" (42mm) of precipitation.
In Galesburg, Illinois, snow does not fall in May through September.
With an average of 15h and 6min of daylight, June has the longest days of the year in Galesburg, Illinois.
June has the most sunshine of the year, with an average of 10.1h of sunshine.
June and July, with an average maximum UV index of 6, are months with the highest UV index in Galesburg, Illinois.
With average high and low temperatures of 81.1°F (27.3°C) and 64.9°F (18.3°C) respectively, July is Galesburg's warmest month.
With an average relative humidity of 84%, July is the most humid month in Galesburg.
October is the least humid month in Galesburg, Illinois, with an average relative humidity of 72%.
With an average of 9h and 18min of daylight, December has the shortest days of the year in Galesburg, Illinois.
With an average maximum UV index of 1, December is the month with the lowest UV index in Galesburg, Illinois.
Average temperature
Galesburg, IL
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.5°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure
Galesburg, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Galesburg, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.9mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
Galesburg, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Galesburg, IL
- Average rainfall in January:
0.47" - Average rainfall in February:
0.59" - Average rainfall in March:
0.75" - Average rainfall in April:
1.3" - Average rainfall in May:
1.65" - Average rainfall in June:
1.34"
- Average rainfall in July:
1.14" - Average rainfall in August:
0.83" - Average rainfall in September:
1.02" - Average rainfall in October:
0.98" - Average rainfall in November:
0.59" - Average rainfall in December:
0.47"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").
Average rainfall days
Galesburg, IL
- Average rainfall days in January:
4 days - Average rainfall days in February:
3.9 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
11.8 days - Average rainfall days in May:
15.2 days - Average rainfall days in June:
14.5 days
- Average rainfall days in July:
12.8 days - Average rainfall days in August:
10.1 days - Average rainfall days in September:
8.7 days - Average rainfall days in October:
8.8 days - Average rainfall days in November:
6.3 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).
Average snowfall
Galesburg, IL
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Galesburg, IL
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
3.2 days - Average snowfall days in April:
0.9 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
2 days - Average snowfall days in December:
6 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Galesburg, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 12min - Average sunshine in March:
6h and 24min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 42min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 48min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Galesburg, IL
- Average sunshine days in January:
20 days - Average sunshine days in February:
18.9 days - Average sunshine days in March:
17.5 days - Average sunshine days in April:
16.3 days - Average sunshine days in May:
13.7 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
13.2 days - Average sunshine days in August:
16.8 days - Average sunshine days in September:
18.4 days - Average sunshine days in October:
19.9 days - Average sunshine days in November:
20.5 days - Average sunshine days in December:
21.6 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).
Average UV index
Galesburg, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Galesburg, IL
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility
Galesburg, IL
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
