Spencer, MT Weather & Growing Conditions
Tonight
40°F
Showers And Thunderstorms
Showers and thunderstorms before 3am, then rain likely. Cloudy. Low around 40, with temperatures rising to around 43 overnight. East wind 2 to 6 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Showers And Thunderstorms | 2 to 6 mph E | 95% |
| Saturday | 54°F | Light Rain Likely then Showers And Thunderstorms Likely | 2 to 8 mph SSE | 70% |
| Saturday Night | 37°F | Chance Showers And Thunderstorms then Chance Light Rain | 1 to 5 mph WNW | 37% |
| Sunday | 63°F | Patchy Fog then Partly Sunny | 1 to 6 mph WNW | 6% |
| Sunday Night | 34°F | Partly Cloudy | 1 to 5 mph NE | 1% |
| Monday | 68°F | Sunny | 1 to 5 mph SSE | 1% |
| Monday Night | 38°F | Partly Cloudy | 1 to 6 mph ESE | 1% |
| Tuesday | 68°F | Mostly Sunny | 0 to 5 mph SE | 2% |
| Tuesday Night | 38°F | Partly Cloudy | 1 to 6 mph ESE | 7% |
| Wednesday | 69°F | Sunny | 1 to 9 mph SE | 3% |
| Wednesday Night | 38°F | Mostly Clear | 3 to 9 mph ESE | 1% |
| Thursday | 71°F | Sunny | 3 to 12 mph SE | 2% |
| Thursday Night | 39°F | Partly Cloudy | 5 to 9 mph SE | 3% |
| Friday | 70°F | Mostly Sunny | 5 to 15 mph SSE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Spencer, MT
Last spring frost
Jun 11
First fall frost
Sep 10
Growing season
89 days
Hardiness zone
5a
Explore more for Spencer, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Lima, Mt (19.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.