September weather forecast
Missouri, USA

September in Missouri heralds the transition from summer to autumn, with temperatures beginning to moderate and the humidity starting to decrease. The minimum temperature ranges from 50°F (10°C) to 60°F (15.6°C), and the maximum temperature averages between 70°F (21.1°C) to 80°F (26.7°C). The drop in temperature from the hot summer months is noticeable, paving the way for the more comfortable conditions of the fall season.

Precipitation in September continues the pattern of occasional rain and thunderstorms, but the incidence of extreme weather events tends to decline. The rainfall is less intense compared to the summer months, and the overall weather begins to stabilize.

The decrease in humidity and the gentle cooling of temperatures create a pleasant climate across the state, allowing for an array of outdoor activities. September sees the leaves beginning to change colors, especially towards the end of the month, adding to the scenic beauty of Missouri's landscapes.

Sunshine is still plentiful in September, though the days continue to shorten as the state moves towards the fall equinox. The combination of sun, moderate temperatures, and decreasing humidity provides a refreshing contrast to the vigor and intensity of the summer.

The geographical variations within Missouri, including the humid continental climate in the north and the humid subtropical climate in the south, contribute to a nuanced transition into autumn. Regions like the Bootheel may still experience somewhat warmer conditions, reflecting the overall diversity of the state's climate.

September stands as a transitional month in Missouri, offering a blend of summer's warmth with autumn's growing mildness. The shift in weather creates a welcoming and invigorating atmosphere, encouraging exploration and appreciation of the state's natural beauty as it prepares for the coming fall.

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• Kansas City - September »
  In Kansas City during September, the rain falls for 8.1 days and regularly aggregates up to 4.17" (106mm) of precipitation. In Kansas City the average relative humidity in September is 70.4%.
• St. Louis - September »
  Louis in September, it is raining for 7.4 days, with typically 3.15" (80mm) of accumulated precipitation. Louis, during September, the rain falls for 7.4 days and regularly aggregates up to 3.15" (80mm) of precipitation.
• Springfield - September »
  In Springfield, in September, during 14.3 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Springfield, in September, it is raining for 14.3 days, with typically 2.44" (62mm) of accumulated precipitation.
• Columbia - September »
  In Columbia during September, the rain falls for 8.2 days and regularly aggregates up to 0.55" (14mm) of precipitation. In Columbia in September, during 8.2 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.
• Independence - September »
  In Independence in September, it is raining for 12.1 days, with typically 2.36" (60mm) of accumulated precipitation. In Independence, snow does not fall in June through September.
• Lee's Summit - September »
  In Lee's Summit, during September, the rain falls for 12.3 days and regularly aggregates up to 2.72" (69mm) of precipitation. In Lee's Summit in September, during 12.3 rainfall days, 2.72" (69mm) of precipitation is typically accumulated.
• O'Fallon - September »
  September's arrival in O'Fallon coincides with a soft drop in the average high-temperature, subtly decreasing from August's warm 85.5°F (29.7°C) to a still moderately hot 79.5°F (26.4°C). In O'Fallon, in September, during 11.3 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.
• Blue Springs - September »
  On the first day of September in Blue Springs sunrise is at 6:46 am and sunset at 7:47 pm. Transition into September in Blue Springs subtly marks a drop in the average high-temperature, moderately moving from a warm 84.6°F (29.2°C) in August to a still moderately hot 78.1°F (25.6°C).
• Florissant - September »
  In Florissant, in September, during 12.4 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the month of September, the nighttime temperature in Florissant dips to an average of 59.9°F (15.5°C).
• Joplin - September »
  In Joplin during September, the rain falls for 12.5 days and regularly aggregates up to 2.72" (69mm) of precipitation. Joplin's transition into September involves a gentle shift in temperature, receding from a hot 87.1°F (30.6°C) in August to a moderately hot 79.9°F (26.6°C).
• Chesterfield - September »
  On the first day of September in Chesterfield sunrise is at 6:32 am and sunset at 7:31 pm. On the first day of September in Chesterfield sunrise is at 6:32 am and sunset at 7:31 pm.
• Jefferson City - September »
  On the last day of September, in Jefferson City, sunrise is at 7:04 am and sunset at 6:52 pm CDT. The average relative humidity in September in Jefferson City, Missouri, is 73%.