World > North America > United States > Missouri > Arch  

Arch, MO 7-Day Night Weather Forecast

Feedback E-mail the Weather

Quick Weather Clicks

Arch, MO 7-Day Night Weather Forecast

Current Conditions

Settings
Arch MO weather - Clear - 61°F
Clear
61°F
Updated 7:20 am
Feels Like 63°F
Humidity 89%
Wind N 0 mph
Barometer  30.1 in
Dew Point 58°F
Arch MO weather - Clear - 16°C
Clear
16°C
Updated 7:20 am
Feels Like 17°C
Humidity 89%
Wind N 0 km/h
Barometer  101.9 kPa
Dew Point 14°C
WX Settings

Weather Quote O' the Day

Add a Weather Quote―
Arch MO Weather - 8:20 am
Weather in ArchArch Weather

Arch, MO Weather Forecast

Weather ArchArch weather forecast

Arch, MO Weather Forecast Date: 422 AM CDT Tue Sep 08 2026

The area/counties/county of: Madison County Il, including the cities of: Alton, Edwardsville, Belleville, Cahokia, Saint Charles, and Saint Louis.
Expand All or toggle through each period.

Today... Mostly sunny. Highs in the mid 90s. Southeast winds around 5 mph.

Tonight... Mostly clear. Not as cool with lows in the lower 70s. South winds around 5 mph.

Wednesday... Partly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Southwest winds 5 to 10 mph, becoming west in the afternoon. Chance of rain 50%. Heat index values up to 106.

Wednesday Night... Showers and thunderstorms likely in the evening, then showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Humid with lows around 70. West winds around 5 mph. Chance of rain near 100%.

Thursday... A slight chance of thunderstorms. Showers, mainly in the morning. Much cooler with highs around 80. Northwest winds around 5 mph. Chance of rain near 100%.

Thursday Night... Partly cloudy. Lows in the lower 60s. Highs in the mid 80s.

Friday... Partly cloudy. Lows in the lower 60s. Highs in the mid 80s.

Friday Night... Mostly clear. A slight chance of showers after midnight. Lows in the upper 60s. Chance of rain 20%.

Saturday... Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50%.

Saturday Night... Partly cloudy with a 40% chance of showers. Lows in the upper 60s.

Sunday... Mostly sunny. A chance of showers in the morning. Highs in the upper 80s. Chance of rain 30%.

Sunday Night... Partly cloudy with a 20% chance of showers. Lows in the upper 60s.

POP = Probability of Precipitation

Trending Headlines

Trending Entertainment Headlines

Arch Radar Loop

Use the map search tool if you want to place a location marker on the radar map...

Arch Quick Facts

National Two Day Weather Forecast


E-mail the Arch Weather Forecast

Voice your opinion or tell us about page issues...