Mercer, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mercer, a town in Mercer County, Missouri.
Tonight
71°F
Partly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 71. South wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Mercer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 8 mph S | 19% |
| Saturday | 83°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 21% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 6 mph N | 73% |
| Sunday | 71°F | Chance Showers And Thunderstorms | 6 to 10 mph N | 53% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 9 mph NE | 53% |
| Monday | 62°F | Chance Rain Showers | 10 mph NE | 53% |
| Monday Night | 54°F | Chance Rain Showers | 9 mph NE | 45% |
| Tuesday | 59°F | Mostly Cloudy | 9 mph NE | 11% |
| Tuesday Night | 49°F | Mostly Cloudy | 6 mph NE | 4% |
| Wednesday | 63°F | Mostly Sunny | 6 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) for Mercer (40.511, -93.530). Updated through the day.
Growing snapshot for Mercer
Last spring frost
Apr 25
First fall frost
Oct 15
Growing season
174 days
Hardiness zone
5b
More local growing data for Mercer: nearby ZIP 64661 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Princeton, Mo (10.1 mi from Mercer). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.