Gretna, MO Weather Forecast
Local 7-day forecast
Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Gretna, MO in one place.
A slight chance of showers and thunderstorms between 2pm and 5pm. Sunny. High near 98, with temperatures falling to around 95 in the afternoon. Heat index values as high as 104. South wind 1 to 6 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Gretna, 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: Sep 15, 2026 10:50 PM CDT.
The active forecast window currently covers Sep 16 to Sep 22, 2026 for Gretna, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 22, 2026
- Latest sync
- Sep 15, 2026 10:50 PM CDT
- Forecast office
- SGF
- Source
- NOAA / NWS
Daily Outlook
This Week in Gretna
Wednesday looks like the warmest upcoming period in Gretna at 98 degrees F.
Monday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Saturday at about 1 to 8 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 10:50 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- SGF
- Radar station
- KSGF
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 74. Heat index values as high as 97. South wind 0 to 6 mph.
Sunny, with a high near 98. Heat index values as high as 104. South wind around 2 mph.
Mostly clear, with a low around 73. Southeast wind around 2 mph.
Sunny, with a high near 97.
Mostly clear, with a low around 72.
Sunny, with a high near 97.
Mostly clear, with a low around 71.
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 94.
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 68.
A chance of showers and thunderstorms. Partly sunny, with a high near 85.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
A chance of rain showers. Mostly sunny, with a high near 83.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Sunny then Slight Chance Showers And Thunderstorms
|
98°F |
1 to 6 mph
S
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
74°F |
0 to 6 mph
S
|
|
Thursday
Sep 17
|
Sunny
|
98°F |
2 mph
S
|
|
Thursday Night
Sep 17
|
Mostly Clear
|
73°F |
2 mph
SE
|
|
Friday
Sep 18
|
Sunny
|
97°F |
0 to 5 mph
SW
|
|
Friday Night
Sep 18
|
Mostly Clear
|
72°F |
3 mph
S
|
|
Saturday
Sep 19
|
Sunny
|
97°F |
1 to 8 mph
SW
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
71°F |
1 to 5 mph
SW
|
|
Sunday
Sep 20
|
Sunny then Slight Chance Showers And Thunderstorms
|
94°F |
1 to 7 mph
SW
|
|
Sunday Night
Sep 20
|
Slight Chance Showers And Thunderstorms
|
68°F |
1 to 6 mph
NW
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
85°F |
1 to 6 mph
NW
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
63°F |
1 to 6 mph
N
|
|
Tuesday
Sep 22
|
Chance Rain Showers
|
83°F |
1 to 5 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Gretna.