Saint Peters, MO Weather Tomorrow

Find tomorrow's weather forecast for Saint Peters with an accurate 5 day outlook showing daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details for the Saint Peters area and around St. Charles county, Missouri.
Updated: Tue Oct 20th 2026 1:45 AM CDT
Saint Peters, MO Weather – 10-20 – Sunny
73° / 49°
Sunny
In Saint Peters, it will be sunny with highs near 73°F and lows around 49°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 5mph and gusts of 13.6mph at 1 PM. Humidity levels should be comfortable, sitting around 48% on average, the maximum being 66% at 7 AM and 30% being its lowest at 3 PM. Barometric pressure is its highest of 30.35inHg at 9 AM, a lowest point of 30.25inHg at 4 PM with an avg 30.29inHg.
Saint Peters, MO Weather – 10-21 – Sunny
76° / 52°

Weather Tomorrow

Sunny
Highs will reach 76°F with lows near 52°F in Saint Peters, where sunshine is. There's a very small chance of rainfall, only about 3%. Winds will be light at 5mph and gusts of 15mph at 1 PM. Humidity levels should be comfortable, sitting around 44% on average, the maximum being 58% at 7 AM and 28% being its lowest at 2 PM. Barometric pressure is its highest of 30.29inHg at 9 AM, a lowest point of 30.19inHg at 4 PM with an avg 30.24inHg.
Saint Peters, MO Weather – 10-22 – Sunny
77° / 54°
Sunny
In Saint Peters, bright and sunny conditions with highs near 77°F and lows around 54°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 5mph and gusts of 15.9mph at 1 PM. Humidity levels should be comfortable, sitting around 44% on average, the maximum being 59% at 7 AM and 28% being its lowest at 4 PM. Barometric pressure is its highest of 30.27inHg at 9 AM, a lowest point of 30.17inHg at 4 PM with an avg 30.22inHg.
Saint Peters, MO Weather – 10-23 – Sunny
78° / 56°
Sunny
In Saint Peters, it will be sunny with highs near 78°F and lows around 56°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 9mph and gusts of 14.8mph at 9 PM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 53% at 7 AM and 27% being its lowest at 3 PM. Barometric pressure is its highest of 30.29inHg at 9 AM, a lowest point of 30.2inHg at 4 PM with an avg 30.24inHg.
Saint Peters, MO Weather – 10-24 – Overcast
80° / 57°
Overcast
Saint Peters may see overcast, with daytime highs of 80°F and overnight lows near 57°F. There's a very small chance of rainfall, only about 9%. Winds will be light at 10mph and gusts of 20.6mph at 11 PM. Humidity levels should be comfortable, sitting around 45% on average, the maximum being 57% at 5 AM and 27% being its lowest at 4 PM. Barometric pressure is its highest of 30.33inHg at 10 AM, a lowest point of 30.24inHg at 4 PM with an avg 30.28inHg.
Saint Peters, MO Weather – 10-25 – Overcast
79° / 60°
Overcast
It will be overcast in Saint Peters, with a high of 79°F and a low of 60°F. There's a very small chance of rainfall, only about 10%. Winds will be light at 10mph and gusts of 23.8mph at 4 AM. Humidity levels should be comfortable, sitting around 46% on average, the maximum being 56% at 7 AM and 31% being its lowest at 4 PM. Barometric pressure is its highest of 30.35inHg at 10 AM, a lowest point of 30.26inHg at 4 PM with an avg 30.3inHg.

5 Day Forecast Nearby

More Local Information

Bookmark and Share

Get the LocalConditions.com App on Google Play
Sign up for a membership to go Ad free