If you’re seeking a sunny getaway, the ideal months to visit Rosemont - Il are July, August and September. During this time, the average temperature soars to 22.09 °C. Additionally, the sun shines brightest in June, July, and August, which are the top three sunniest months of the year, offering an impressive average of 90.58 hours of sunshine daily.
On the other hand, if you prefer cooler weather, consider planning your trip to Rosemont - Il during the months of January, February and March. During these months, the average temperature is -2.94 °C.
For travelers who are less concerned about temperature but want to stay dry, it's wise to steer clear of visiting during January, February and March. During these months, the average precipitation in Rosemont - Il reaches 6.75 mm. In contrast, the months of January, February and March, are much drier, averaging 0 mm of rainfall.