|Best time to travel / Season|
St. Louis' position in the middle latitudes allows the area to be affected by warm moist air that originates in the Gulf of Mexico, as well as cold air masses that originate in Canada. The alternate invasion of these air masses produces a wide variety of weather conditions, and allows the region to enjoy a true four-season climate Climate and Temperatures
During the summer months, air originating from the Gulf of Mexico tends to dominate the area, producing warm conditions, however, extremely hot temperatures (100 degrees or more) are expected on no more than five days per year.
Winters are brisk and stimulating, but prolonged periods of extremely cold weather are rare. Records show that temperatures drop to zero or below an average of only 2 or 3 days per year, and temperatures as cold as 32 degrees or lower occur less than 25 days in most years.
Snowfall of an inch or less is received on 5 to 10 days in most years.