Climate and monthly weather forecastSugar Island, IL
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Sugar Island, Illinois, with an average temperature ranging between min 18.5°F (-7.5°C) and max 30.2°F (-1°C). In Sugar Island, the lowest average temperatures are observed in January, with a high of 30.2°F (-1°C) and a low of 18.5°F (-7.5°C). Weather in January »Weather in February
The last month of the winter, February, is a cold month in Sugar Island, Illinois, with an average temperature fluctuating between 34.7°F (1.5°C) and 21.6°F (-5.8°C). February ushers in an average high-temperature of a cold 34.7°F (1.5°C), aligning closely with the preceding month. Weather in February »Weather in March
March, the first month of the spring in Sugar Island, is a frosty month, with an average temperature varying between 47.5°F (8.6°C) and 33.4°F (0.8°C). As Sugar Island, Illinois, transitions into March, a rise in the average high-temperature is observed, moving from an icy 34.7°F (1.5°C) in February to a chilly 47.5°F (8.6°C). Weather in March »Weather in April
April in Sugar Island, Illinois, is a mild spring month, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 43.5°F (6.4°C). As April begins, there is an increase in the average high-temperature, moving from a chilly 47.5°F (8.6°C) in March to a refreshing 59.5°F (15.3°C). Weather in April »Weather in May
May, the last month of the spring in Sugar Island, is a pleasant month, with an average temperature varying between 71.2°F (21.8°C) and 54.5°F (12.5°C). Entering May, Sugar Island sees a temperature rise, with the average high-temperature advancing from April's refreshing 59.5°F (15.3°C) to a pleasant 71.2°F (21.8°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Sugar Island, Illinois, with an average temperature varying between 62.6°F (17°C) and 79.3°F (26.3°C). In Sugar Island, the average high-temperature in June slightly rises, from a pleasant 71.2°F (21.8°C) in May, to a moderately hot 79.3°F (26.3°C). Weather in June »Weather in July
July, like June, in Sugar Island, Illinois, is a moderately hot summer month, with an average temperature varying between 64.4°F (18°C) and 81.1°F (27.3°C). The highest temperatures are recorded in July, with averages reaching a high of 81.1°F (27.3°C) and a low of 64.4°F (18°C). In July, the heat index is appraised at a hot 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in Sugar Island, is another warm month, with an average temperature fluctuating between 79.5°F (26.4°C) and 62.4°F (16.9°C). Sugar Island experiences an average high-temperature of a still moderately hot 79.5°F (26.4°C) with the onset of August, subtly varied from July's 81.1°F (27.3°C). Weather in August »Weather in September
September, the first month of the autumn in Sugar Island, is still a warm month, with an average temperature ranging between min 57.2°F (14°C) and max 75.2°F (24°C). Sugar Island experiences a subtle adjustment in high-temperatures to a still moderately hot 75.2°F (24°C) with the onset of September, maintaining near parity with August's 79.5°F (26.4°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Sugar Island, Illinois, with an average temperature varying between 46.8°F (8.2°C) and 62.1°F (16.7°C). Sugar Island's October weather features a mild decline in high-temperatures, reducing from a warm 75.2°F (24°C) in September to a refreshing 62.1°F (16.7°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Sugar Island, Illinois, with temperature in the range of an average high of 47.7°F (8.7°C) and an average low of 34.9°F (1.6°C). November witnesses a clear temperature decrease, falling from a comfortable 62.1°F (16.7°C) in October to a chilly 47.7°F (8.7°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Sugar Island, Illinois, with an average temperature fluctuating between 36.5°F (2.5°C) and 26.1°F (-3.3°C). Sugar Island in December demonstrates a small temperature transition, adjusting from an average high of a frosty 47.7°F (8.7°C) in November to an icy 36.5°F (2.5°C). Weather in December »Updated: Aug 14, 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, recording an average high temperature of 30.2°F (-1°C) and a low temperature of 18.5°F (-7.5°C), is Sugar Island's coldest month.
January, February and December are months with the least rain when the rain falls for 5.6 days and typically aggregates up to 1.06" (27mm) of rain.
In Sugar Island, during the entire year, the rain falls for 138.7 days and collects up to 21.77" (553mm) of precipitation.
Months with snowfall are January through April, October through December.
In Sugar Island, during the entire year, snow falls for 35.3 days and aggregates up to 9.37" (238mm) of snow.
January has the least sunshine of the year, with an average of 3.7h of sunshine.
February is the month with the most snowfall. Snow falls for 8 days and accumulates 2.48" (63mm) of snow.
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 in Sugar Island. Rain falls for 17.3 days and accumulates 3.19" (81mm) of precipitation.
In Sugar Island, snow does not fall in May through September.
June has the longest days of the year, with an average of 15h and 6min of daylight.
With an average of 9.7h of sunshine, June has the most sunshine of the year.
The months with the highest UV index are June and July, with an average maximum UV index of 6.
In Sugar Island, the peak average temperatures are observed in July, with a high of 81.1°F (27.3°C) and a low of 64.4°F (18°C).
The most humid month is July, with an average relative humidity of 85%.
With an average relative humidity of 71%, October is the least humid month.
With an average of 9h and 18min of daylight, December has the shortest days of the year.
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Sugar Island, 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 (30.2°F).
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure
Sugar Island, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.08"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:
30.01"Hg - Average pressure in November:
30.11"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 (29.92"Hg).
Average wind speed
Sugar Island, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.2mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.3mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.7mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Sugar Island, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Sugar Island, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
1.06" - Average rainfall in March:
1.61" - Average rainfall in April:
2.4" - Average rainfall in May:
3.19" - Average rainfall in June:
2.48"
- Average rainfall in July:
2.36" - Average rainfall in August:
2.13" - Average rainfall in September:
1.38" - Average rainfall in October:
1.81" - Average rainfall in November:
1.22" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is May (3.19").
The driest months (with the least rainfall) are January, February and December (1.06").
Average rainfall days
Sugar Island, IL
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
11.4 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
17.2 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
11.9 days - Average rainfall days in October:
10.3 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
6.8 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
Sugar Island, IL
The month with the highest snowfall is February (2.48").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Sugar Island, IL
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
8 days - Average snowfall days in March:
4.6 days - Average snowfall days in April:
1.3 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:
0.4 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
7.7 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Sugar Island, 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:
3h and 42min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 36min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
9h and 36min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 30min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 18min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Sugar Island, IL
- Average sunshine days in January:
16.6 days - Average sunshine days in February:
15.1 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
10 days - Average sunshine days in August:
12.1 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
17.3 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
17.7 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10 days).
Average UV index
Sugar Island, 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
Sugar Island, IL
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility
Sugar Island, 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).
