The average annual temperature for Illinois, United States is 11°C/52°F.
The average annual temperature for Illinois, United States is 11°C/52°F.
July is the hottest or warmest month in Illinois, United States, with an average maximum temperature of 30°C/86°F.
January is the coolest or coldest month in Illinois, United States, with an average minimum temperature of -8°C/18°F.
Springfield is the hottest or warmest place in Illinois, United States, with an average maximum temperature of 12°C/54°F.
Elgin is the coldest place in Illinois, United States, with an average maximum temperature of 9°C/48°F.
-4°C/25°F is the average temperature for Illinois, United States in January.
-3°C/27°F is the average temperature for Illinois, United States in February.
4°C/39°F is the average temperature for Illinois, United States in March.
10°C/50°F is the average temperature for Illinois, United States in April.
17°C/63°F is the average temperature for Illinois, United States in May.
22°C/72°F is the average temperature for Illinois, United States in June.
25°C/77°F is the average temperature for Illinois, United States in July.
24°C/75°F is the average temperature for Illinois, United States in August.
20°C/68°F is the average temperature for Illinois, United States in September.
13°C/55°F is the average temperature for Illinois, United States in October.
5°C/41°F is the average temperature for Illinois, United States in November.
1°C/34°F is the average temperature for Illinois, United States in December.
Average annual rainfall for Illinois, United States is 1,154mm (45 inches).
May is the wettest or most rainy month in Illinois, United States, with an average rainfall of 145mm (6 inches).
January is the driest or least rainy month in Illinois, United States, with an average rainfall of 56mm (2 inches).
South Lawndale is the most rainy or wettest place in Illinois, United States, with an average annual rainfall of 1,222mm (48 inches).
Wheaton is the least rainy or driest place in Illinois, United States, with an average annual rainfall of 928mm (37 inches).
| Location | Min Temp | Max Temp | Avg Temp | Rainfall |
|---|---|---|---|---|
| Albany Park | 7 | 16 | 12 | 1,012 |
| Arlington Heights | 4 | 14 | 9 | 1,133 |
| Aurora | 5 | 15 | 10 | 1,160 |
| Belmont Cragin | 7 | 16 | 12 | 1,012 |
| Berwyn | 7 | 16 | 11 | 1,222 |
| Bloomington | 5 | 17 | 11 | 1,101 |
| Champaign | 6 | 17 | 12 | 1,031 |
| Chicago | 7 | 16 | 11 | 1,222 |
| Chicago Lawn | 7 | 16 | 11 | 1,222 |
| Cicero | 7 | 16 | 11 | 1,222 |
| Decatur | 6 | 18 | 12 | 1,012 |
| Des Plaines | 6 | 15 | 11 | 1,132 |
| Edgewater | 7 | 16 | 12 | 1,012 |
| Elgin | 4 | 14 | 9 | 1,173 |
| Evanston | 6 | 15 | 11 | 1,132 |
| Hoffman Estates | 4 | 14 | 9 | 1,173 |
| Irving Park | 7 | 16 | 12 | 1,012 |
| Joliet | 6 | 16 | 11 | 1,185 |
| Lincoln Park | 7 | 16 | 11 | 1,222 |
| Logan Square | 7 | 16 | 11 | 1,222 |
| Mount Prospect | 4 | 14 | 9 | 1,173 |
| Naperville | 5 | 15 | 10 | 928 |
| Near North Side | 7 | 16 | 11 | 1,222 |
| Normal | 5 | 17 | 11 | 1,101 |
| North Peoria | 7 | 17 | 12 | 1,149 |
| Oak Lawn | 7 | 16 | 11 | 1,222 |
| Oak Park | 7 | 16 | 11 | 1,222 |
| Palatine | 4 | 14 | 9 | 1,133 |
| Peoria | 7 | 17 | 12 | 1,149 |
| Portage Park | 7 | 16 | 12 | 1,012 |
| Rockford | 3 | 15 | 9 | 1,097 |
| Rogers Park | 7 | 16 | 12 | 1,012 |
| Schaumburg | 4 | 14 | 9 | 1,173 |
| Skokie | 6 | 15 | 11 | 1,132 |
| South Lawndale | 7 | 16 | 11 | 1,222 |
| South Shore | 7 | 16 | 11 | 1,222 |
| Springfield | 7 | 18 | 12 | 1,129 |
| Tinley Park | 7 | 16 | 11 | 1,222 |
| Uptown | 7 | 16 | 12 | 1,012 |
| Waukegan | 4 | 14 | 9 | 1,133 |
| West Ridge | 7 | 16 | 12 | 1,012 |
| West Town | 7 | 16 | 11 | 1,222 |
| Wheaton | 5 | 15 | 10 | 928 |
On average, there are 56mm/2 inches of rain in January in Illinois, United States.
On average, there are 59mm/2 inches of rain in February in Illinois, United States.
On average, there are 73mm/3 inches of rain in March in Illinois, United States.
On average, there are 123mm/5 inches of rain in April in Illinois, United States.
On average, there are 145mm/6 inches of rain in May in Illinois, United States.
On average, there are 142mm/6 inches of rain in June in Illinois, United States.
On average, there are 112mm/4 inches of rain in July in Illinois, United States.
On average, there are 105mm/4 inches of rain in August in Illinois, United States.
On average, there are 92mm/4 inches of rain in September in Illinois, United States.
On average, there are 117mm/5 inches of rain in October in Illinois, United States.
On average, there are 67mm/3 inches of rain in November in Illinois, United States.
On average, there are 63mm/2 inches of rain in December in Illinois, United States.
Yes, Illinois, United States is further west than the prime meridian (zero degrees longitude), which means it is in the Western Hemisphere. The midpoint of Illinois, United States is further west than the prime meridian (zero degrees longitude) by approximately 3,003 miles (4,833km).
No, Illinois, United States is not further east than the prime meridian (zero degrees longitude), which means it is not in the Eastern Hemisphere.
Yes, Illinois, United States is further north than the equator, which means it is in the Northern Hemisphere. The midpoint of Illinois, United States is approximately 2,807 miles (4,518km) north of the equator.
No, Illinois, United States is not further south than the equator, which means it is not in the Southern Hemisphere.