Lamar, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lamar, a city in Barton County, Missouri.
Overnight
73°F
Clear
Clear. Low around 73, with temperatures rising to around 75 overnight. South wind around 8 mph.
7-day forecast for Lamar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Clear | 8 mph S | 1% |
| Saturday | 98°F | Sunny | 8 to 14 mph SW | 1% |
| Saturday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 31% |
| Sunday | 90°F | Chance Showers And Thunderstorms | 7 mph SW | 32% |
| Sunday Night | 65°F | Showers And Thunderstorms | 5 mph N | 82% |
| Monday | 78°F | Showers And Thunderstorms | 5 to 9 mph N | 82% |
| Monday Night | 58°F | Mostly Cloudy | 6 to 10 mph N | 12% |
| Tuesday | 74°F | Partly Sunny | 9 mph NE | 4% |
| Tuesday Night | 53°F | Partly Cloudy | 5 to 9 mph NE | 3% |
| Wednesday | 76°F | Sunny | 7 mph NE | 2% |
| Wednesday Night | 54°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 79°F | Mostly Sunny | 5 mph E | 7% |
| Thursday Night | 58°F | Mostly Cloudy | 5 mph E | 10% |
| Friday | 79°F | Slight Chance Rain Showers | 6 mph E | 20% |
Forecast source: National Weather Service (api.weather.gov) for Lamar (37.494, -94.278). Updated through the day.
Growing snapshot for Lamar
Last spring frost
Apr 9
First fall frost
Oct 27
Growing season
199 days
Hardiness zone
7a
More local growing data for Lamar: nearby ZIP 64759 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lamar 7N, Mo (5.4 mi from Lamar). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.