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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
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Savanna, Illinois, with temperature in the range of an average high of 26.1°F (-3.3°C) and an average low of 13.5°F (-10.3°C). January is Savanna's coldest month, registering average high temperatures of 26.1°F (-3.3°C) and lows of 13.5°F (-10.3°C). Weather in January »
Weather in February
February, the last month of the winter in Savanna, is also a subzero cold month, with an average temperature varying between 16.9°F (-8.4°C) and 30.4°F (-0.9°C). February's arrival shows an average high-temperature of a still freezing cold 30.4°F (-0.9°C), hardly different from the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Savanna, Illinois, with an average temperature fluctuating between 44.6°F (7°C) and 29.8°F (-1.2°C). As February gives way to March, the average high-temperature displays an increase, moving from a freezing cold 30.4°F (-0.9°C) to a chilly 44.6°F (7°C). Weather in March »
Weather in April
April is a moderate spring month in Savanna, Illinois, with an average temperature varying between 40.6°F (4.8°C) and 56.7°F (13.7°C). An increase in the average high-temperature marks April, moving from March's chilly 44.6°F (7°C) to a refreshing 56.7°F (13.7°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Savanna, Illinois, with an average temperature ranging between max 68.5°F (20.3°C) and min 51.6°F (10.9°C). Savanna's May weather brings a rise in high-temperatures, moving from a moderate 56.7°F (13.7°C) in April to an agreeable 68.5°F (20.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Savanna, Illinois, with temperature in the range of an average low of 60.8°F (16°C) and an average high of 77.4°F (25.2°C). Savanna observes a slight ascent in average high-temperatures during June, adjusting from a pleasant 68.5°F (20.3°C) in May to a moderately hot 77.4°F (25.2°C). Weather in June »
Weather in July
July, like June, in Savanna, Illinois, is another warm summer month, with an average temperature fluctuating between 63.5°F (17.5°C) and 80.1°F (26.7°C). July is the warmest month of the year, registering average temperatures as high as 80.1°F (26.7°C) and as low as 63.5°F (17.5°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Savanna, Illinois, with an average temperature fluctuating between 61.2°F (16.2°C) and 79.2°F (26.2°C). The average high-temperature during August is a still warm 79.2°F (26.2°C), almost matching the conditions of the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Savanna, Illinois, with an average temperature fluctuating between 73.4°F (23°C) and 54.5°F (12.5°C). As September commences, the average high-temperature subtly reduces, transitioning from 79.2°F (26.2°C) in August to a still moderately hot 73.4°F (23°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Savanna, Illinois, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 43.5°F (6.4°C). As October begins, there is a decrease in the average high-temperature, falling from a moderately hot 73.4°F (23°C) in September to a moderate 59.7°F (15.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Savanna, Illinois, with an average temperature varying between 45.1°F (7.3°C) and 31.6°F (-0.2°C). November signals a considerable drop in Savanna's average high-temperature, reducing from a refreshing 59.7°F (15.4°C) in October to a chilly 45.1°F (7.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Savanna, Illinois, with an average temperature fluctuating between 32.7°F (0.4°C) and 22.5°F (-5.3°C). The shift to December brings a decrease in the average high-temperature, falling from a chilly 45.1°F (7.3°C) in November to a wintry 32.7°F (0.4°C). Weather in December »
Updated: Jun 23, 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 month is the coldest in Savanna?
Savanna's coldest weather arrives in January, when temperatures average a high of 26.1°F (-3.3°C) and a low of 13.5°F (-10.3°C).
What is the most humid month?
With an average relative humidity of 86%, January is the most humid month.
How much does it rain?
In Savanna, during the entire year, the rain falls for 149.3 days and collects up to 29.76" (756mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 11.7 days and accumulates 5.12" (130mm) of snow.
How many days does it snow?
In Savanna, during the entire year, snow falls for 41.2 days and aggregates up to 16.73" (425mm) of snow.
What is the month with the least sunshine in Savanna?
January has the least sunshine of the year, with an average of 3.7h of sunshine.
What are the months with the lowest UV index?
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 4.4 days and typically collects 1.38" (35mm) of precipitation.
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 rainiest month?
The month with the most rainfall is May, when the rain falls for 18.5 days and typically aggregates up to 4.09" (104mm) of precipitation.
When it does not snow?
In Savanna, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 12min of daylight.
What part of the year is the hottest?
July is the month that records the highest temperatures, with averages ranging from a high of 80.1°F (26.7°C) to a low of 63.5°F (17.5°C).
What month has the most sunshine?
With an average of 9.8h of sunshine, July has the most sunshine of the year.
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?
October is the least humid month, with an average relative humidity of 74%.
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.
Average temperature
Savanna, IL
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (26.1°F).
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure
Savanna, IL
- Average pressure in January:
30.12"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"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Savanna, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Savanna, IL
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Savanna, IL
- Average rainfall in January:
1.42" - Average rainfall in February:
1.38" - Average rainfall in March:
1.89" - Average rainfall in April:
3.27" - Average rainfall in May:
4.09" - Average rainfall in June:
3.82"
- Average rainfall in July:
3.23" - Average rainfall in August:
2.17" - Average rainfall in September:
2.48" - Average rainfall in October:
2.68" - Average rainfall in November:
1.81" - Average rainfall in December:
1.54"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days
Savanna, IL
- Average rainfall days in January:
5.2 days - Average rainfall days in February:
4.4 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
16 days - Average rainfall days in May:
18.5 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
12.6 days - Average rainfall days in November:
9.3 days - Average rainfall days in December:
8 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (4.4 days).
Average snowfall
Savanna, IL
- Average snowfall in January:
5.12" - Average snowfall in February:
4.06" - Average snowfall in March:
2.01" - Average snowfall in April:
0.91" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Savanna, IL
- Average snowfall days in January:
11.7 days - Average snowfall days in February:
9.4 days - Average snowfall days in March:
6.2 days - Average snowfall days in April:
1.4 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:
0.4 days - Average snowfall days in November:
3.3 days - Average snowfall days in December:
8.7 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Savanna, IL
- Average daylight in January:
9h and 3min - 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 4min - 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 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Savanna, IL
- Average sunshine days in January:
15.3 days - Average sunshine days in February:
14.4 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
10.9 days - Average sunshine days in June:
9.6 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
13.5 days - Average sunshine days in September:
16 days - Average sunshine days in October:
15.8 days - Average sunshine days in November:
17.8 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (9.6 days).
Average UV index
Savanna, 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
Savanna, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
Savanna, IL
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).