Saco, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Saco, a town in Phillips County, Montana.
Today
47°F
Sunny
Sunny. High near 47, with temperatures falling to around 41 in the afternoon. Northwest wind around 2 mph.
7-day forecast for Saco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 47°F | Sunny | 2 mph NW | 0% |
| Tonight | 29°F | Partly Cloudy | 3 mph E | 0% |
| Thursday | 49°F | Partly Sunny | 5 mph SSE | 0% |
| Thursday Night | 33°F | Partly Cloudy | 6 mph SW | 0% |
| Friday | 53°F | Sunny | 3 to 8 mph SW | 0% |
| Friday Night | 36°F | Partly Cloudy | 8 mph SW | 0% |
| Saturday | 56°F | Sunny | 3 to 9 mph W | 0% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph SSE | 0% |
| Sunday | 61°F | Partly Sunny | 3 to 8 mph SSW | 0% |
| Sunday Night | 37°F | Partly Cloudy | 8 to 13 mph W | 0% |
| Monday | 55°F | Mostly Sunny | 5 to 8 mph W | 0% |
| Monday Night | 34°F | Partly Cloudy | 5 mph S | 1% |
| Tuesday | 57°F | Mostly Sunny | 2 to 7 mph S | 1% |
| Tuesday Night | 36°F | Partly Cloudy | 6 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Saco (48.457, -107.341). Updated through the day.
Growing snapshot for Saco
Last spring frost
May 15
First fall frost
Sep 23
Growing season
130 days
Hardiness zone
3b
More local growing data for Saco: nearby ZIP 59261 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Saco 1 Nnw, Mt (5.4 mi from Saco). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.