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Jefferson County, MO Weather Forecast
Jefferson County, MO Weather Forecast Dated: 510 AM Wed Sep 23 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Wednesday, September 23, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
75°F 24°C
Sunny
Early-Evening
68°F 20°C
Partly Cloudy
Pleasant near 75°F 24°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds turning from the NNE to the NE at 8 mph 13 km/h.
Thursday, September 24, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
71°F 22°C
Partly Cloudy
Comfortable with temperatures reaching 77°F 25°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure.
Friday, September 25, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
79°F 26°C
Cloudy
Early-Evening
74°F 24°C
Overcast
Enjoyable around 79°F 26°C, overcast throughout the day, with lower humidity and steady pressure.
Saturday, September 26, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
79°F 26°C
Overcast
Early-Evening
65°F 18°C
Overcast
Mild temperatures up to 79°F 26°C, overcast throughout the day, with increasing humidity and steady pressure. Winds blowing from the E at 6 mph 9 km/h.
Sunday, September 27, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
61°F 16°C
Light Showers
Early-Evening
62°F 17°C
Scattered Showers
Refreshing around 61°F 16°C, scattered downpours possible, with steady humidity and barometric pressure falling. Winds moving from the E to the NE at 7 mph 11 km/h.
Monday, September 28, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
69°F 20°C
Overcast
Early-Evening
64°F 18°C
Sunny
Pleasant near 69°F 20°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with increasing humidity and steady pressure. Winds swinging from the E to the ESE at 7 mph 11 km/h.
Tuesday, September 29, 2026
Mid-Morning
60°F 16°C
Light Fog
Mid-Afternoon
79°F 26°C
Overcast
Early-Evening
72°F 22°C
Scattered Showers
Comfortable with temperatures reaching 79°F 26°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure falling.
Wednesday, September 30, 2026
Mid-Morning
57°F 14°C
Scattered Showers
Mid-Afternoon
69°F 21°C
Sunny
Early-Evening
63°F 18°C
Sunny
Enjoyable around 69°F 21°C, scattered downpours possible, with lower humidity and steady pressure. Winds shifting from the WNW to the W at 10 mph 16 km/h. Gusts up to 26 mph 41 km/h.
Thursday, October 1, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
67°F 19°C
Sunny
Mild temperatures up to 73°F 23°C, sunny throughout the day, with steady humidity and steady pressure. Winds turning from the W to the SW at 4 mph 6 km/h.
Friday, October 2, 2026
Mid-Morning
68°F 20°C
Partly Cloudy
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
76°F 25°C
Sunny
Very warm with a high of 86°F 30°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the SW to the SSW at 8 mph 13 km/h. Gusts up to 23 mph 36 km/h.
Saturday, October 3, 2026
Mid-Morning
66°F 19°C
Overcast
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
70°F 21°C
Overcast
Pleasant near 73°F 23°C, overcast throughout the day, with increasing humidity and steady pressure.
Sunday, October 4, 2026
Mid-Morning
58°F 15°C
Sunny
Mid-Afternoon
72°F 22°C
Sunny
Early-Evening
63°F 18°C
Sunny
Comfortable with temperatures reaching 72°F 22°C, sunny throughout the day, with lower humidity and steady pressure.
Monday, October 5, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
82°F 28°C
Overcast
Early-Evening
74°F 23°C
Sunny
Quite warm around 82°F 28°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with increasing humidity and steady pressure.
Tuesday, October 6, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
72°F 22°C
Sunny
Warm temperatures up to 80°F 27°C, sunny throughout the day, with steady humidity and steady pressure.
Jefferson County, MO Weather Radar Map
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