Saint John, MO Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Saint John, MO in one place.
Showers and thunderstorms likely before 4am. Mostly cloudy, with a low around 51. North wind around 9 mph. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Saint John, 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: Apr 29, 2026 2:54 AM CDT.
The active forecast window currently covers Apr 29 to May 5, 2026 for Saint John, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 29 to May 5, 2026
- Latest sync
- Apr 29, 2026 2:54 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint John
Tuesday looks like the warmest upcoming period in Saint John at 76 degrees F.
Friday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Sunday at about 6 to 13 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 29, 2026 2:54 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 66. Northwest wind around 12 mph, with gusts as high as 21 mph.
Partly cloudy, with a low around 45. Northwest wind 2 to 10 mph.
Mostly sunny, with a high near 67. West wind 2 to 7 mph.
Mostly cloudy, with a low around 47. North wind around 6 mph.
Mostly sunny, with a high near 62.
Mostly cloudy, with a low around 42.
Mostly sunny, with a high near 63.
Mostly clear, with a low around 45.
Sunny, with a high near 72.
A slight chance of rain showers after 1am. Mostly clear, with a low around 52. Chance of precipitation is 20%.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 74. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
A chance of rain showers before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 76. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 29
|
Showers And Thunderstorms Likely
|
51°F |
9 mph
N
|
|
Wednesday
Apr 29
|
Mostly Sunny
|
66°F |
12 mph
NW
|
|
Wednesday Night
Apr 29
|
Partly Cloudy
|
45°F |
2 to 10 mph
NW
|
|
Thursday
Apr 30
|
Mostly Sunny
|
67°F |
2 to 7 mph
W
|
|
Thursday Night
Apr 30
|
Mostly Cloudy
|
47°F |
6 mph
N
|
|
Friday
May 1
|
Mostly Sunny
|
62°F |
6 to 9 mph
N
|
|
Friday Night
May 1
|
Mostly Cloudy
|
42°F |
2 to 7 mph
N
|
|
Saturday
May 2
|
Mostly Sunny
|
63°F |
2 to 9 mph
NW
|
|
Saturday Night
May 2
|
Mostly Clear
|
45°F |
1 to 7 mph
NW
|
|
Sunday
May 3
|
Sunny
|
72°F |
6 to 13 mph
W
|
|
Sunday Night
May 3
|
Mostly Clear then Slight Chance Rain Showers
|
52°F |
9 mph
SW
|
|
Monday
May 4
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
74°F |
8 to 12 mph
W
|
|
Monday Night
May 4
|
Chance Showers And Thunderstorms
|
53°F |
5 to 9 mph
W
|
|
Tuesday
May 5
|
Chance Showers And Thunderstorms
|
76°F |
7 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint John.
