Mercer, MO Weather & Growing Conditions
Tonight
71°F
Partly Cloudy
Partly cloudy, with a low around 71. South wind around 8 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Partly Cloudy | 8 mph S | 12% |
| Saturday | 83°F | Chance Showers And Thunderstorms | 5 to 9 mph SW | 28% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 7 mph NNW | 70% |
| Sunday | 71°F | Chance Showers And Thunderstorms | 6 to 10 mph NNE | 53% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 10 mph NE | 53% |
| Monday | 62°F | Chance Showers And Thunderstorms | 10 mph NE | 54% |
| Monday Night | 54°F | Chance Rain Showers | 9 mph NE | 46% |
| Tuesday | 59°F | Mostly Cloudy | 9 mph NE | 11% |
| Tuesday Night | 49°F | Mostly Cloudy | 6 mph NE | 4% |
| Wednesday | 63°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph ENE | 4% |
| Thursday | 65°F | Partly Sunny | 3 mph E | 12% |
| Thursday Night | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 2 mph E | 15% |
| Friday | 67°F | Slight Chance Rain Showers | 5 mph E | 15% |
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 Sep 19, 2026.