St. Martins, MO enjoys a humid subtropical climate with hot and humid summers and mild winters. Average temperatures in the summer range from the mid-80s to low 90s during the day, cooling to temperatures in the mid-60s at night. Winters are much milder than other parts of Missouri, with average daytime highs in the mid-40s and overnight lows in the low 30s on average. Precipitation is plentiful throughout the year with an average annual rainfall of 39 inches, most of which occurs from April through October.
St. Martins, Missouri gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.
St. Martins averages 14 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 196 sunny days per year in St. Martins. The US average is 205 sunny days.
St. Martins gets some kind of precipitation, on average, 106 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 88 degrees
Winter Low: the January low is 21
Rain: averages 44 inches of rain a year
Snow: averages 14 inches of snow a year