With a population of around 11,800, Pontiac sits in Illinois, United States. The city operates in the Central Time Zone.
Recent weather here gives a sense of typical conditions: in 2025, Pontiac recorded a mean annual temperature of 53°F, ranging from -8°F lows in January to 92°F highs in July, with about 32 inches of precipitation across the year.
View historical weather for Pontiac · More cities in Illinois