Saco, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Saco, a town in Phillips County, Montana.
Today
76°F
Sunny
Sunny, with a high near 76. West northwest wind 5 to 10 mph, with gusts as high as 18 mph.
7-day forecast for Saco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Sunny | 5 to 10 mph WNW | 0% |
| Tonight | 49°F | Mostly Clear | 2 to 10 mph SW | 1% |
| Wednesday | 85°F | Partly Sunny | 3 to 14 mph WSW | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 13 mph NW | 0% |
| Thursday | 91°F | Sunny | 1 to 10 mph NW | 0% |
| Thursday Night | 54°F | Mostly Clear | 5 to 13 mph NNE | 0% |
| Friday | 90°F | Sunny | 7 mph ESE | 0% |
| Friday Night | 57°F | Mostly Clear | 8 to 12 mph ENE | 1% |
| Saturday | 90°F | Sunny | 10 mph ENE | 0% |
| Saturday Night | 58°F | Partly Cloudy | 7 to 13 mph NE | 3% |
| Sunday | 88°F | Mostly Sunny | 12 mph NE | 3% |
| Sunday Night | 56°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 13 mph NE | 16% |
| Monday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 10 mph ENE | 20% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 10 to 14 mph ENE | 26% |
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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Zortman
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 Aug 4, 2026.