Lamar, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lamar, a city in Barton County, Missouri.
This Afternoon
70°F
Slight Chance Drizzle
A slight chance of drizzle after 4pm. Mostly cloudy. High near 70, with temperatures falling to around 62 in the afternoon. Southwest wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
7-day forecast for Lamar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Slight Chance Drizzle | 14 to 17 mph SW | 24% |
| Tonight | 48°F | Slight Chance Drizzle | 8 to 13 mph W | 20% |
| Wednesday | 61°F | Mostly Sunny | 7 to 12 mph W | 5% |
| Wednesday Night | 41°F | Mostly Clear | 5 mph SW | 0% |
| Thursday | 63°F | Mostly Sunny then Chance Rain Showers | 2 to 7 mph W | 38% |
| Thursday Night | 40°F | Mostly Cloudy | 3 mph NW | 8% |
| Friday | 59°F | Partly Sunny | 3 to 8 mph N | 0% |
| Friday Night | 39°F | Partly Cloudy | 3 mph N | 0% |
| Saturday | 61°F | Partly Sunny | 3 mph NW | 0% |
| Saturday Night | 37°F | Mostly Clear | 2 mph W | 5% |
| Sunday | 65°F | Sunny | 2 to 6 mph W | 5% |
| Sunday Night | 38°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 69°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 43°F | Mostly Clear | 5 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 Nov 3, 2026.