Lamar, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lamar, a city in Johnson County, Arkansas.
Overnight
70°F
Mostly Clear
Mostly clear, with a low around 70. Wind around 0 mph.
7-day forecast for Lamar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Mostly Clear | 0 mph | 0% |
| Saturday | 98°F | Sunny | 0 to 10 mph SW | 0% |
| Saturday Night | 70°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Sunday | 98°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Sunday Night | 70°F | Mostly Cloudy then Chance Showers And Thunderstorms | 0 to 5 mph E | 31% |
| Monday | 94°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 31% |
| Monday Night | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph NNW | 29% |
| Tuesday | 89°F | Mostly Sunny | 5 to 10 mph NNE | 12% |
| Tuesday Night | 61°F | Partly Cloudy | 5 to 10 mph NE | 9% |
| Wednesday | 88°F | Sunny | 5 mph NE | 1% |
| Wednesday Night | 59°F | Mostly Clear | 5 mph ENE | 0% |
| Thursday | 88°F | Mostly Sunny | 5 mph ENE | 2% |
| Thursday Night | 61°F | Partly Cloudy | 5 mph ENE | 2% |
| Friday | 88°F | Mostly Sunny | 5 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov) for Lamar (35.444, -93.395). Updated through the day.
Growing snapshot for Lamar
Last spring frost
Mar 25
First fall frost
Nov 10
Growing season
232 days
Hardiness zone
8a
More local growing data for Lamar: nearby ZIP 72846 weather · frost dates · planting calendar · Arkansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Clarksville 6 Ne, Ar (5.5 mi from Lamar). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.