Saco, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Saco, a town in Phillips County, Montana.
Overnight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. North northeast wind around 8 mph.
7-day forecast for Saco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Cloudy | 8 mph NNE | 1% |
| Saturday | 70°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 12 mph NE | 20% |
| Saturday Night | 50°F | Slight Chance Rain Showers | 8 mph E | 23% |
| Sunday | 66°F | Mostly Cloudy | 7 to 10 mph ESE | 13% |
| Sunday Night | 49°F | Partly Cloudy | 10 mph ESE | 4% |
| Monday | 72°F | Partly Sunny | 8 to 15 mph SE | 2% |
| Monday Night | 51°F | Partly Cloudy | 13 mph SE | 0% |
| Tuesday | 78°F | Sunny | 8 mph SSE | 0% |
| Tuesday Night | 52°F | Mostly Clear | 6 mph SE | 1% |
| Wednesday | 79°F | Mostly Sunny | 2 to 7 mph SSE | 2% |
| Wednesday Night | 51°F | Mostly Clear | 5 mph SE | 4% |
| Thursday | 80°F | Sunny | 3 to 8 mph SE | 2% |
| Thursday Night | 53°F | Mostly Clear | 8 mph SE | 2% |
| Friday | 79°F | Mostly Sunny | 7 to 10 mph SE | 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 Sep 19, 2026.