Monarch, MT Weather & Growing Conditions
This Afternoon
54°F
Light Rain Likely
Rain likely. Cloudy, with a high near 54. East wind around 5 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 54°F | Light Rain Likely | 5 mph E | 60% |
| Tonight | 44°F | Slight Chance Light Rain then Mostly Cloudy | 5 mph S | 23% |
| Sunday | 63°F | Mostly Sunny | 1 to 5 mph ENE | 6% |
| Sunday Night | 45°F | Mostly Clear | 3 to 8 mph SSE | 1% |
| Monday | 69°F | Sunny | 7 mph SW | 2% |
| Monday Night | 49°F | Mostly Clear | 3 to 9 mph SW | 0% |
| Tuesday | 70°F | Sunny | 7 mph SW | 0% |
| Tuesday Night | 53°F | Partly Cloudy | 6 mph SSW | 1% |
| Wednesday | 70°F | Mostly Sunny | 5 to 8 mph SW | 3% |
| Wednesday Night | 52°F | Partly Cloudy | 7 mph SSW | 7% |
| Thursday | 70°F | Sunny | 9 mph SSW | 3% |
| Thursday Night | 54°F | Mostly Clear | 6 to 12 mph SSE | 5% |
| Friday | 69°F | Mostly Sunny | 10 mph SSW | 7% |
| Friday Night | 49°F | Slight Chance Light Rain then Mostly Cloudy | 5 to 8 mph SSW | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Monarch, MT
Last spring frost
Jun 6
First fall frost
Sep 12
Growing season
99 days
Hardiness zone
4b
Explore more for Monarch, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Neihart 8 Nnw, Mt (4.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.