Lamar, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lamar, a city in Barton County, Missouri.
Overnight
69°F
Clear
Clear. Low around 69, with temperatures rising to around 71 overnight. Southeast wind around 7 mph.
7-day forecast for Lamar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Clear | 7 mph SE | 0% |
| Tuesday | 95°F | Sunny | 3 to 8 mph S | 0% |
| Tuesday Night | 75°F | Mostly Clear | 3 to 7 mph SE | 3% |
| Wednesday | 96°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 7 to 10 mph S | 21% |
| Wednesday Night | 72°F | Chance Showers And Thunderstorms | 6 mph SE | 39% |
| Thursday | 93°F | Chance Showers And Thunderstorms | 6 mph S | 39% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 5 mph S | 58% |
| Friday | 91°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 7 mph S | 58% |
| Friday Night | 71°F | Slight Chance Showers And Thunderstorms | 6 mph S | 24% |
| Saturday | 94°F | Slight Chance Showers And Thunderstorms then Sunny | 6 to 9 mph S | 18% |
| Saturday Night | 73°F | Mostly Clear | 9 mph S | 5% |
| Sunday | 95°F | Sunny | 9 to 13 mph SW | 3% |
| Sunday Night | 74°F | Mostly Clear | 10 mph S | 3% |
| Monday | 95°F | Sunny | 10 to 14 mph SW | 1% |
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 Aug 4, 2026.