Saco, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Saco, a town in Phillips County, Montana.
This Afternoon
51°F
Sunny
Sunny. High near 51, with temperatures falling to around 44 in the afternoon. East southeast wind around 6 mph.
7-day forecast for Saco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 51°F | Sunny | 6 mph ESE | 0% |
| Tonight | 29°F | Patchy Fog | 0 to 5 mph E | 0% |
| Wednesday | 48°F | Patchy Fog then Mostly Sunny | 2 mph NW | 0% |
| Wednesday Night | 30°F | Mostly Cloudy | 3 mph SSE | 0% |
| Thursday | 50°F | Mostly Sunny | 5 mph SSE | 0% |
| Thursday Night | 32°F | Partly Cloudy | 6 mph WSW | 0% |
| Friday | 54°F | Sunny | 3 to 10 mph SW | 4% |
| Friday Night | 35°F | Partly Cloudy | 10 mph WSW | 7% |
| Saturday | 56°F | Sunny | 5 to 12 mph WSW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph S | 0% |
| Sunday | 61°F | Mostly Sunny | 3 to 9 mph SSW | 0% |
| Sunday Night | 37°F | Partly Cloudy | 9 to 15 mph W | 0% |
| Monday | 54°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Monday Night | 34°F | Mostly Cloudy | 5 mph SSE | 0% |
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.