Compare Weather & Climate
London is 6573.4 kilometers (4084.5 miles) away and 6.0 hours ahead of Illinois, United States. London's climate is classified as Marine west coast, warm summer (Köppen climate classification: Cfb) while Illinois has a Humid continental, no dry season, hot summer climate (Dfa).
London generally has warmer weather than Illinois. The average mean temperature in London is 12.17°C (53.91°F) while Illinois’s temperature is 12.07°C (53.73°F) and the difference is 0.1°C (32.18°F). London is warmest on average in July, when the day time temperature may reach 19.93°C (67.87°F), while Illinois is hottest in July when the average high temperature is 24.9°C (76.82°F). London is coldest in January when the average low temperature is 2.34°C (36.21°F), while January is the coldest month in Illinois, when night time temperature often falls below -7.09°C (19.24°F).
Finally, London has about 1.33 times more rainfall than Illinois, (London’s 50.85mm vs Illinois’s average of 38.16mm).
Comparison summary
| Weather | London | Illinois | Difference |
|---|---|---|---|
| Hottest month | July: 19.93°C (67.87°F) | July: 24.9°C (76.82°F) | 4.97°C (40.95°F) |
| Coldest month | January: 2.34°C (36.21°F) | January: -7.09°C (19.24°F) | 9.43°C (48.97°F) |
| Wettest month | June: 67.82mm (2.67in) | May: 71.99mm (2.83in) | 4.17mm (0.16in) |
| Driest month | April: 38.88mm (1.53in) | December: 17.82mm (0.7in) | 21.06mm (0.83in) |