Saint Peters, MO Weather Forecast
Local 7-day forecast
Mostly Clear
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Peters, MO in one place.
Mostly clear, with a low around 63. Northwest wind around 3 mph.
Local Weather Overview
This forecast page for Saint Peters, 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: Aug 23, 2026 3:51 AM CDT.
The active forecast window currently covers Aug 23 to Aug 29, 2026 for Saint Peters, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 23 to Aug 29, 2026
- Latest sync
- Aug 23, 2026 3:51 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Peters
Wednesday looks like the warmest upcoming period in Saint Peters at 88 degrees F.
Sunday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Sunday at about 2 to 8 mph NW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Aug 23, 2026 3:51 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly sunny, with a high near 82. Northwest wind 2 to 8 mph.
Mostly cloudy, with a low around 62. Northeast wind 2 to 6 mph.
Mostly sunny, with a high near 82. Southeast wind around 5 mph.
Partly cloudy, with a low around 64. East wind around 3 mph.
Mostly sunny, with a high near 85.
Partly cloudy, with a low around 68.
Mostly sunny, with a high near 88.
Mostly clear, with a low around 68.
Sunny, with a high near 86.
Mostly clear, with a low around 66.
Sunny, with a high near 84.
Partly cloudy, with a low around 66.
A slight chance of rain showers after 7am. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Aug 23
|
Mostly Clear
|
63°F |
3 mph
NW
|
|
Sunday
Aug 23
|
Mostly Sunny
|
82°F |
2 to 8 mph
NW
|
|
Sunday Night
Aug 23
|
Mostly Cloudy
|
62°F |
2 to 6 mph
NE
|
|
Monday
Aug 24
|
Mostly Sunny
|
82°F |
5 mph
SE
|
|
Monday Night
Aug 24
|
Partly Cloudy
|
64°F |
3 mph
E
|
|
Tuesday
Aug 25
|
Mostly Sunny
|
85°F |
5 mph
SE
|
|
Tuesday Night
Aug 25
|
Partly Cloudy
|
68°F |
2 mph
SE
|
|
Wednesday
Aug 26
|
Mostly Sunny
|
88°F |
3 mph
SW
|
|
Wednesday Night
Aug 26
|
Mostly Clear
|
68°F |
2 mph
W
|
|
Thursday
Aug 27
|
Sunny
|
86°F |
2 to 7 mph
NW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
66°F |
0 to 5 mph
N
|
|
Friday
Aug 28
|
Sunny
|
84°F |
0 to 3 mph
NW
|
|
Friday Night
Aug 28
|
Partly Cloudy
|
66°F |
2 mph
NE
|
|
Saturday
Aug 29
|
Slight Chance Rain Showers
|
85°F |
5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Peters.
