Mackay, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mackay, a city in Butte County, Idaho.
Tonight
43°F
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before midnight, then showers and thunderstorms likely. Mostly cloudy. Low around 43, with temperatures rising to around 45 overnight. North northwest wind around 6 mph. Chance of precipitation is 60%.
7-day forecast for Mackay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph NNW | 58% |
| Saturday | 60°F | Showers And Thunderstorms Likely | 2 to 6 mph NNW | 65% |
| Saturday Night | 42°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 6 mph NNE | 27% |
| Sunday | 66°F | Mostly Sunny | 1 to 8 mph WSW | 5% |
| Sunday Night | 45°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 70°F | Sunny | 5 mph WSW | 1% |
| Monday Night | 47°F | Partly Cloudy | 5 mph SW | 1% |
| Tuesday | 71°F | Mostly Sunny | 6 mph WSW | 8% |
| Tuesday Night | 47°F | Partly Cloudy | 5 mph WSW | 6% |
| Wednesday | 72°F | Sunny | 6 mph SW | 2% |
| Wednesday Night | 47°F | Mostly Clear | 6 mph SW | 3% |
| Thursday | 73°F | Sunny | 3 to 8 mph S | 2% |
| Thursday Night | 49°F | Partly Cloudy | 5 to 8 mph SW | 2% |
| Friday | 73°F | Mostly Sunny | 5 to 9 mph S | 5% |
Forecast source: National Weather Service (api.weather.gov) for Mackay (43.912, -113.613). Updated through the day.
Growing snapshot for Mackay
Last spring frost
May 22
First fall frost
Sep 22
Growing season
119 days
Hardiness zone
5a
More local growing data for Mackay: nearby ZIP 83255 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Arco, Id (9.6 mi from Mackay). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.