Climate and monthly weather forecastGeneva, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Geneva, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 27.9°F (-2.3°C) and 16.2°F (-8.8°C). January, with its high-temperature average of 27.9°F (-2.3°C) and a low-temperature average of 16.2°F (-8.8°C), is the coldest month. Weather in January »Weather in February
February, the last month of the winter in Geneva, is also a subzero cold month, with temperature in the range of an average high of 31.8°F (-0.1°C) and an average low of 19°F (-7.2°C). The arrival of February marks a slight shift to an average high-temperature of a still subzero cold 31.8°F (-0.1°C) from January's 27.9°F (-2.3°C). Weather in February »Weather in March
March, the first month of the spring in Geneva, is a frosty month, with temperature in the range of an average high of 44.8°F (7.1°C) and an average low of 30.6°F (-0.8°C). March shows a rise in the average high-temperature, moving from February's freezing cold 31.8°F (-0.1°C) to a frosty 44.8°F (7.1°C). Weather in March »Weather in April
April is a moderate spring month in Geneva, Illinois, with temperature in the range of an average high of 56.1°F (13.4°C) and an average low of 40.1°F (4.5°C). The arrival of April signals an increase in the average high-temperature, moving from a frosty 44.8°F (7.1°C) in March to a moderate 56.1°F (13.4°C). Weather in April »Weather in May
May, the last month of the spring in Geneva, is an agreeable month, with an average temperature ranging between max 68.2°F (20.1°C) and min 51.4°F (10.8°C). With the onset of May, Geneva experiences a temperature shift, with the average high-temperature moving from a refreshing 56.1°F (13.4°C) in April to an agreeable 68.2°F (20.1°C). Weather in May »Weather in June
June, the first month of the summer in Geneva, is a moderately hot month, with an average temperature fluctuating between 77.5°F (25.3°C) and 60.1°F (15.6°C). An upsurge in temperatures occurs as May gives way to June, with average highs shifting from a pleasant 68.2°F (20.1°C) to a warm 77.5°F (25.3°C). Weather in June »Weather in July
July, like June, in Geneva, Illinois, is another warm summer month, with temperature in the range of an average low of 64.2°F (17.9°C) and an average high of 81°F (27.2°C). Geneva's warmest month, July, generally records average temperatures ranging from a high of 81°F (27.2°C) to a low of 64.2°F (17.9°C). The heat index value for July is estimated at a hot 86°F (30°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Geneva, Illinois, with an average temperature fluctuating between 79.5°F (26.4°C) and 62.8°F (17.1°C). Geneva's shift into August sets the average high-temperature at a still moderately hot 79.5°F (26.4°C), a figure that deviates only slightly from July's 81°F (27.2°C). Weather in August »Weather in September
September, the first month of the autumn in Geneva, is still a warm month, with an average temperature ranging between min 56.5°F (13.6°C) and max 73.4°F (23°C). A moderate decline in average high-temperatures is noted in September, moving from 79.5°F (26.4°C) in August to a still moderately hot 73.4°F (23°C). Weather in September »Weather in October
October, like September, is another mild autumn month in Geneva, Illinois, with an average temperature ranging between max 60.3°F (15.7°C) and min 44.8°F (7.1°C). As September transitions into October, Geneva sees a drop in the average high-temperature, transitioning from a moderately hot 73.4°F (23°C) to a mild 60.3°F (15.7°C). Weather in October »Weather in November
November, the last month of the autumn in Geneva, is also a frosty month, with an average temperature fluctuating between 45.5°F (7.5°C) and 32.7°F (0.4°C). Geneva's transition into November is marked by a clear temperature shift, receding from a moderate 60.3°F (15.7°C) in October to a frosty 45.5°F (7.5°C). Weather in November »Weather in December
December, the first month of the winter in Geneva, is still a cold month, with an average temperature fluctuating between 23.5°F (-4.7°C) and 34.2°F (1.2°C). December is characterized by a reduction in the average high-temperature, from a chilly 45.5°F (7.5°C) in November to a cold 34.2°F (1.2°C). Weather in December »Updated: Aug 3, 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
The coldest period is January, when temperatures fluctuate between an average high of 27.9°F (-2.3°C) and a low of 16.2°F (-8.8°C).
January and February, with an average relative humidity of 83%, are most humid months.
In Geneva, during the entire year, the rain falls for 101.9 days and collects up to 8.58" (218mm) of precipitation.
January through April, October through December are months with snowfall in Geneva.
The month with the most snowfall is January, when snow falls for 7.6 days and typically aggregates up to 1.14" (29mm) of snow.
In Geneva, during the entire year, snow falls for 28.3 days and aggregates up to 3.74" (95mm) of snow.
The month with the least sunshine is January, with an average of 3.7h of sunshine.
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Geneva.
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.
May is the month with the most rainfall. Rain falls for 12.4 days and accumulates 1.26" (32mm) of precipitation.
In Geneva, snow does not fall in May through September.
The month with the longest days is June, with an average of 15h and 12min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
The warmest time of the year is July, with temperatures averaging a high of 81°F (27.2°C) and a low of 64.2°F (17.9°C).
The month with the most sunshine is July, with an average of 9.9h of sunshine.
The least humid month is October, with an average relative humidity of 74%.
November and December are months with the least rain when the rain falls for 5.1 days and typically aggregates up to 0.39" (10mm) of rain.
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Geneva, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.9°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure
Geneva, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Geneva, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.1mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.7mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.2mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity
Geneva, IL
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Geneva, IL
- Average rainfall in January:
0.43" - Average rainfall in February:
0.43" - Average rainfall in March:
0.47" - Average rainfall in April:
0.98" - Average rainfall in May:
1.26" - Average rainfall in June:
1.06"
- Average rainfall in July:
0.98" - Average rainfall in August:
0.67" - Average rainfall in September:
0.71" - Average rainfall in October:
0.79" - Average rainfall in November:
0.39" - Average rainfall in December:
0.39"
The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are November and December (0.39").
Average rainfall days
Geneva, IL
- Average rainfall days in January:
3.4 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
8.2 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
12.4 days - Average rainfall days in June:
12.3 days
- Average rainfall days in July:
12.3 days - Average rainfall days in August:
10.6 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
5.1 days - Average rainfall days in December:
5 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (3.4 days).
Average snowfall
Geneva, IL
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Geneva, IL
- Average snowfall days in January:
7.6 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
4.3 days - Average snowfall days in April:
1.2 days - Average snowfall days in May:
0.1 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:
2.1 days - Average snowfall days in December:
5.6 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Geneva, IL
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - 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 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 42min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Geneva, IL
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
19.8 days - Average sunshine days in March:
19.5 days - Average sunshine days in April:
15.6 days - Average sunshine days in May:
14.9 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
16.4 days - Average sunshine days in September:
17.7 days - Average sunshine days in October:
20.8 days - Average sunshine days in November:
22.2 days - Average sunshine days in December:
22.4 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (13.3 days).
Average UV index
Geneva, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Geneva, IL
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
Geneva, 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).
