Joplin, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Joplin, a community in Hill County, Montana.
This Afternoon
48°F
Mostly Sunny
Mostly sunny. High near 48, with temperatures falling to around 42 in the afternoon. South wind 5 to 8 mph.
7-day forecast for Joplin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Mostly Sunny | 5 to 8 mph S | 0% |
| Tonight | 28°F | Mostly Cloudy | 3 mph WSW | 0% |
| Wednesday | 45°F | Patchy Fog | 3 mph WSW | 0% |
| Wednesday Night | 27°F | Patchy Fog | 5 mph SSW | 0% |
| Thursday | 50°F | Patchy Fog then Mostly Sunny | 5 to 13 mph SW | 0% |
| Thursday Night | 32°F | Partly Cloudy | 10 to 15 mph WSW | 0% |
| Friday | 52°F | Mostly Sunny | 10 to 18 mph WSW | 5% |
| Friday Night | 35°F | Partly Cloudy | 16 to 20 mph WSW | 5% |
| Saturday | 52°F | Mostly Sunny | 6 to 16 mph WSW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 6 to 9 mph SW | 0% |
| Sunday | 58°F | Partly Sunny | 9 to 16 mph SW | 1% |
| Sunday Night | 36°F | Mostly Cloudy | 9 to 16 mph WSW | 3% |
| Monday | 52°F | Partly Sunny | 9 mph SW | 3% |
| Monday Night | 35°F | Mostly Cloudy | 7 to 10 mph SSW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Joplin (48.559, -110.773). Updated through the day.
Growing snapshot for Joplin
Last spring frost
May 21
First fall frost
Sep 19
Growing season
119 days
Hardiness zone
4a
More local growing data for Joplin: nearby ZIP 59530 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Joplin, Mt (4.5 mi from Joplin). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.