Lamar, AR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lamar, a city in Johnson County, Arkansas.
Today
98°F
Sunny
Sunny, with a high near 98. Heat index values as high as 102. East southeast wind around 5 mph.
7-day forecast for Lamar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Sunny | 5 mph ESE | 0% |
| Tonight | 72°F | Mostly Clear | 5 mph E | 0% |
| Wednesday | 101°F | Mostly Sunny | 5 mph ESE | 2% |
| Wednesday Night | 74°F | Partly Cloudy | 0 to 5 mph SE | 3% |
| Thursday | 101°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph S | 15% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 0 to 5 mph ESE | 28% |
| Friday | 96°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 43% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph ESE | 43% |
| Saturday | 97°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SSE | 23% |
| Saturday Night | 72°F | Mostly Clear | 0 to 5 mph SE | 10% |
| Sunday | 98°F | Sunny | 0 to 5 mph SSE | 7% |
| Sunday Night | 73°F | Partly Cloudy | 0 to 5 mph SE | 7% |
| Monday | 98°F | Mostly Sunny | 0 to 5 mph SSE | 9% |
| Monday Night | 74°F | Partly Cloudy | 0 to 5 mph SE | 9% |
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 Aug 4, 2026.