Mercer, MO Weather & Growing Conditions
Today
88°F
Mostly Sunny
Mostly sunny, with a high near 88. South southwest wind 3 to 7 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny | 3 to 7 mph SSW | 13% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 8 mph NE | 54% |
| Wednesday | 77°F | Showers And Thunderstorms | 9 mph NE | 78% |
| Wednesday Night | 62°F | Showers And Thunderstorms Likely | 5 to 9 mph NE | 57% |
| Thursday | 81°F | Showers And Thunderstorms Likely then Mostly Sunny | 5 mph ENE | 55% |
| Thursday Night | 63°F | Mostly Clear | 2 mph E | 3% |
| Friday | 85°F | Mostly Sunny | 6 mph S | 6% |
| Friday Night | 67°F | Mostly Clear | 5 mph S | 11% |
| Saturday | 88°F | Sunny | 5 to 10 mph S | 7% |
| Saturday Night | 72°F | Mostly Clear | 12 mph S | 9% |
| Sunday | 90°F | Sunny | 10 to 15 mph SSW | 9% |
| Sunday Night | 72°F | Partly Cloudy | 10 to 14 mph S | 12% |
| Monday | 91°F | Mostly Sunny | 10 to 16 mph SSW | 12% |
| Monday Night | 73°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 to 15 mph SSW | 23% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mercer, MO
Last spring frost
Apr 25
First fall frost
Oct 15
Growing season
174 days
Hardiness zone
5b
Explore more for Mercer, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, Princeton, Mo (10.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.