Olney is a city of approximately 9,000 people in Illinois, United States. Located in the Central Time Zone at 38.7°N latitude.
Across a typical year Olney sees about 42 inches of precipitation, with May the wettest month and February the driest. Temperatures range from January lows near 23°F up to July highs around 88°F, averaging 56°F annually — characteristic of a humid continental climate.