The average annual temperature for Decatur, Illinois is 12°C/54°F.
The average annual temperature for Decatur, Illinois is 12°C/54°F.
July is the hottest or warmest month in Decatur, Illinois, with an average maximum temperature of 30°C/86°F.
January is the coolest or coldest month in Decatur, Illinois, with an average minimum temperature of -7°C/19°F.
-3°C/27°F is the average temperature for Decatur, Illinois in January.
-1°C/30°F is the average temperature for Decatur, Illinois in February.
6°C/43°F is the average temperature for Decatur, Illinois in March.
12°C/54°F is the average temperature for Decatur, Illinois in April.
18°C/64°F is the average temperature for Decatur, Illinois in May.
23°C/73°F is the average temperature for Decatur, Illinois in June.
25°C/77°F is the average temperature for Decatur, Illinois in July.
23°C/73°F is the average temperature for Decatur, Illinois in August.
21°C/70°F is the average temperature for Decatur, Illinois in September.
13°C/55°F is the average temperature for Decatur, Illinois in October.
6°C/43°F is the average temperature for Decatur, Illinois in November.
2°C/36°F is the average temperature for Decatur, Illinois in December.
Average annual rainfall for Decatur, Illinois is 1,012mm (40 inches).
May is the wettest or most rainy month in Decatur, Illinois, with an average rainfall of 132mm (5 inches).
February is the driest or least rainy month in Decatur, Illinois, with an average rainfall of 46mm (2 inches).
On average, there are 49mm/2 inches of rain in January in Decatur, Illinois.
On average, there are 46mm/2 inches of rain in February in Decatur, Illinois.
On average, there are 72mm/3 inches of rain in March in Decatur, Illinois.
On average, there are 115mm/5 inches of rain in April in Decatur, Illinois.
On average, there are 132mm/5 inches of rain in May in Decatur, Illinois.
On average, there are 127mm/5 inches of rain in June in Decatur, Illinois.
On average, there are 90mm/4 inches of rain in July in Decatur, Illinois.
On average, there are 75mm/3 inches of rain in August in Decatur, Illinois.
On average, there are 81mm/3 inches of rain in September in Decatur, Illinois.
On average, there are 93mm/4 inches of rain in October in Decatur, Illinois.
On average, there are 62mm/2 inches of rain in November in Decatur, Illinois.
On average, there are 70mm/3 inches of rain in December in Decatur, Illinois.
Yes, Decatur, Illinois is further west than the prime meridian (zero degrees longitude), which means it is in the Western Hemisphere. The midpoint of Decatur, Illinois is further west than the prime meridian (zero degrees longitude) by approximately 3,099 miles (4,987km).
No, Decatur, Illinois is not further east than the prime meridian (zero degrees longitude), which means it is not in the Eastern Hemisphere.
Yes, Decatur, Illinois is further north than the equator, which means it is in the Northern Hemisphere. The midpoint of Decatur, Illinois is approximately 2,753 miles (4,430km) north of the equator.
No, Decatur, Illinois is not further south than the equator, which means it is not in the Southern Hemisphere.