Cornwall, MO Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Cornwall, MO in one place.
Sunny, with a high near 94. Heat index values as high as 100. Southwest wind around 3 mph.
Local Weather Overview
This forecast page for Cornwall, MO is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 15, 2026 10:40 PM CDT.
The active forecast window currently covers Sep 17 to Sep 22, 2026 for Cornwall, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 22, 2026
- Latest sync
- Sep 15, 2026 10:40 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Cornwall
Thursday looks like the warmest upcoming period in Cornwall at 94 degrees F.
Monday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Saturday at about 2 to 6 mph SW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 10:40 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KPAH
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 72. South wind around 1 mph.
Sunny, with a high near 93.
Mostly clear, with a low around 71.
Sunny, with a high near 93.
Mostly clear, with a low around 70.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 90. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
A slight chance of rain showers after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Sunny
|
94°F |
3 mph
SW
|
|
Thursday Night
Sep 17
|
Mostly Clear
|
72°F |
1 mph
S
|
|
Friday
Sep 18
|
Sunny
|
93°F |
2 mph
SW
|
|
Friday Night
Sep 18
|
Mostly Clear
|
71°F |
2 mph
S
|
|
Saturday
Sep 19
|
Sunny
|
93°F |
2 to 6 mph
SW
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
70°F |
3 mph
SW
|
|
Sunday
Sep 20
|
Sunny then Slight Chance Showers And Thunderstorms
|
90°F |
5 mph
W
|
|
Sunday Night
Sep 20
|
Slight Chance Showers And Thunderstorms
|
67°F |
5 mph
W
|
|
Monday
Sep 21
|
Chance Rain Showers
|
82°F |
5 mph
NW
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
62°F |
5 mph
N
|
|
Tuesday
Sep 22
|
Partly Sunny then Slight Chance Rain Showers
|
80°F |
5 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cornwall.