Saco, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Saco, a town in Phillips County, Montana.
Today
70°F
Mostly Cloudy
Mostly cloudy, with a high near 70. Northeast wind 7 to 12 mph, with gusts as high as 18 mph.
7-day forecast for Saco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Mostly Cloudy | 7 to 12 mph NE | 0% |
| Tonight | 49°F | Mostly Cloudy | 9 mph ENE | 14% |
| Sunday | 66°F | Patchy Fog then Partly Sunny | 7 to 10 mph ESE | 14% |
| Sunday Night | 47°F | Partly Cloudy | 10 mph SE | 0% |
| Monday | 72°F | Mostly Sunny | 8 to 15 mph SE | 1% |
| Monday Night | 50°F | Mostly Clear | 13 mph SE | 0% |
| Tuesday | 78°F | Sunny | 8 mph SE | 0% |
| Tuesday Night | 51°F | Mostly Clear | 6 mph SE | 2% |
| Wednesday | 81°F | Sunny | 6 mph SE | 3% |
| Wednesday Night | 52°F | Mostly Clear | 6 mph SE | 3% |
| Thursday | 81°F | Sunny | 3 to 8 mph SSE | 2% |
| Thursday Night | 52°F | Mostly Clear | 8 mph SE | 4% |
| Friday | 80°F | Mostly Sunny | 8 to 15 mph SE | 3% |
| Friday Night | 50°F | Partly Cloudy then Slight Chance Rain Showers | 10 to 14 mph E | 15% |
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.