Mercer, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mercer, a town in Mercer County, Missouri.
Today
88°F
Mostly Sunny
Mostly sunny, with a high near 88. South wind 3 to 7 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Mercer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny | 3 to 7 mph S | 13% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 3 to 8 mph NE | 53% |
| Wednesday | 77°F | Showers And Thunderstorms | 8 mph NE | 77% |
| Wednesday Night | 62°F | Showers And Thunderstorms Likely | 5 to 8 mph NE | 58% |
| Thursday | 81°F | Showers And Thunderstorms Likely then Mostly Sunny | 5 mph ENE | 56% |
| Thursday Night | 63°F | Mostly Clear | 2 mph E | 3% |
| Friday | 85°F | Mostly Sunny | 2 to 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 14 mph SSW | 22% |
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 Aug 4, 2026.