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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Geneseo, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 16°F (-8.9°C) and 28°F (-2.2°C). Geneseo's coldest weather arrives in January, when temperatures average a high of 28°F (-2.2°C) and a low of 16°F (-8.9°C). Weather in January »
Weather in February
February, the last month of the winter in Geneseo, is a wintry month, with an average temperature ranging between min 19.8°F (-6.8°C) and max 32.9°F (0.5°C). The beginning of February records an average high-temperature of an icy 32.9°F (0.5°C), almost echoing the conditions of the previous month. Weather in February »
Weather in March
March, the first month of the spring in Geneseo, is a chilly month, with temperature in the range of an average high of 46.9°F (8.3°C) and an average low of 32.4°F (0.2°C). With the onset of March, Geneseo sees a temperature rise, with the average high-temperature moving from February's cold 32.9°F (0.5°C) to a chilly 46.9°F (8.3°C). Weather in March »
Weather in April
April in Geneseo, Illinois, is a mild spring month, with temperature in the range of an average high of 59.2°F (15.1°C) and an average low of 42.4°F (5.8°C). The shift from March to April sees an increase in the average high-temperature, transitioning from a chilly 46.9°F (8.3°C) to a moderate 59.2°F (15.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Geneseo, Illinois, with an average temperature ranging between min 53.4°F (11.9°C) and max 70.7°F (21.5°C). Noticing a change, the average high-temperature during May moves from April's refreshing 59.2°F (15.1°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 warm month in Geneseo, Illinois, with temperature in the range of an average low of 61.9°F (16.6°C) and an average high of 78.8°F (26°C). The onset of June marks a slight increase in the average high-temperature, moving from an agreeable 70.7°F (21.5°C) in May to a warm 78.8°F (26°C). Weather in June »
Weather in July
July, like June, in Geneseo, Illinois, is a moderately hot summer month, with an average temperature ranging between min 64.9°F (18.3°C) and max 81.1°F (27.3°C). July is the warmest month, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 64.9°F (18.3°C). July's heat index is evaluated at a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Geneseo, Illinois, with temperature in the range of an average low of 62.6°F (17°C) and an average high of 80.2°F (26.8°C). In August, the average high-temperature registers at a still moderately hot 80.2°F (26.8°C), nearly identical to July's 81.1°F (27.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Geneseo, Illinois, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 75.4°F (24.1°C). The transition from August to September brings an average high-temperature of a still moderately hot 75.4°F (24.1°C), barely different from August's 80.2°F (26.8°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Geneseo, Illinois, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 45.5°F (7.5°C). In Geneseo, entering October brings a temperature decrement, reducing from September's moderately hot 75.4°F (24.1°C) to a refreshing 61.3°F (16.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Geneseo, Illinois, with an average temperature varying between 33.1°F (0.6°C) and 46.9°F (8.3°C). The drop of average high-temperatures is noticeable in November, with a decrease from a refreshing 61.3°F (16.3°C) in October to a chilly 46.9°F (8.3°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Geneseo, Illinois, with an average temperature fluctuating between 34.5°F (1.4°C) and 24.1°F (-4.4°C). Onset of December comes with a temperature decline, the average high falling from a frosty 46.9°F (8.3°C) in November to a cold 34.5°F (1.4°C). Weather in December »
Updated: Aug 21, 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
What is the coldest month?
During the coldest month in Geneseo, January, temperatures average a high of 28°F (-2.2°C) and a low of 16°F (-8.9°C).
What is the most humid month?
The months with the highest humidity are January and July, with an average relative humidity of 84%.
What is the driest month?
The months with the least rainfall are January and December Rain falls for 4.1 days and accumulates 0.63" (16mm) of rain.
How much does it rain?
In Geneseo, during the entire year, the rain falls for 118.8 days and collects up to 15.04" (382mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 9 days and accumulates 2.13" (54mm) of snow.
How many days does it snow?
Throughout the year, there are 29.3 snowfall days, and 6.54" (166mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4h of sunshine.
When is the lowest UV index in Geneseo?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 16.5 days and typically aggregates up to 2.48" (63mm) of precipitation.
When it does not snow?
In Geneseo, snow does not fall in May through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What is the warmest month?
In Geneseo, July is the warmest month, with temperatures averaging a high of 81.1°F (27.3°C) and a low of 64.9°F (18.3°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10h of sunshine.
When is the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 6.
What is the least humid month?
With an average relative humidity of 72%, October is the least humid month.
What is the month with the shortest days?
With an average of 9h and 12min of daylight, December has the shortest days of the year in Geneseo.
Average temperature
Geneseo, 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 (28°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 (16°F).
Average pressure
Geneseo, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"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:
30.03"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 (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Geneseo, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.2mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity
Geneseo, IL
The months with the highest relative humidity are January and July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Geneseo, IL
- Average rainfall in January:
0.63" - Average rainfall in February:
0.67" - Average rainfall in March:
1.02" - Average rainfall in April:
1.61" - Average rainfall in May:
2.48" - Average rainfall in June:
1.89"
The wettest month (with the highest rainfall) is May (2.48").
The driest months (with the least rainfall) are January and December (0.63").
Average rainfall days
Geneseo, IL
- Average rainfall days in January:
4.1 days - Average rainfall days in February:
3.9 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
13 days - Average rainfall days in August:
11.1 days - Average rainfall days in September:
9.7 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
6.5 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (3.9 days).
Average snowfall
Geneseo, IL
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Geneseo, IL
- Average snowfall days in January:
9 days - Average snowfall days in February:
7.9 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.7 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:
0.5 days - Average snowfall days in November:
1.7 days - Average snowfall days in December:
5.7 days
The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Geneseo, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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 12min).
- Average sunshine in January:
4h - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 3min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 4h).
Average sunshine days
Geneseo, IL
- Average sunshine days in January:
19.6 days - Average sunshine days in February:
17.7 days - Average sunshine days in March:
18.3 days - Average sunshine days in April:
14.7 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
15.5 days - Average sunshine days in August:
17.9 days - Average sunshine days in September:
19 days - Average sunshine days in October:
20 days - Average sunshine days in November:
20.7 days - Average sunshine days in December:
20.9 days
The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is June (12 days).
Average UV index
Geneseo, IL
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Geneseo, 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
Geneseo, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Geneseo, Illinois, USA
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