Weather World
Apex Lake, MO 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Apex Lake, MO Weather Forecast
Apex Lake, MO Weather Forecast Date: 302 PM CDT Tue Sep 01 2026
The area/counties/county of: Gasconade County Mo, including the cities of: Washington, Union, and Sullivan.or toggle through each period.
Tonight... Mostly clear. Lows in the mid 70s. South winds around 5 mph.
Wednesday... Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 103.
Wednesday Night... Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 100 early in the evening.
Thursday... Sunny, hot with highs in the mid 90s. South winds around 5 mph. Heat index values up to 103.
Thursday Night... Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early in the evening.
Friday... Mostly clear. Hot. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105.
Saturday... Mostly clear. Hot. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105.
Saturday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 70s. Heat index values up to 100 early in the evening.
Sunday... Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20%. Heat index values up to 100.
Sunday Night... Partly cloudy. Lows in the upper 60s. Highs around 90.
Monday... Partly cloudy. Lows in the upper 60s. Highs around 90.
POP = Probability of Precipitation
Apex Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...