Mackay, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mackay, a city in Butte County, Idaho.
Tonight
32°F
Mostly Cloudy
Mostly cloudy. Low around 32, with temperatures rising to around 34 overnight. North wind 3 to 8 mph.
7-day forecast for Mackay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 32°F | Mostly Cloudy | 3 to 8 mph N | 0% |
| Wednesday | 50°F | Partly Sunny | 2 to 12 mph NW | 1% |
| Wednesday Night | 31°F | Mostly Clear | 3 mph WNW | 0% |
| Thursday | 45°F | Partly Sunny then Areas Of Fog | 5 mph SSW | 10% |
| Thursday Night | 28°F | Areas Of Fog | 3 to 8 mph W | 10% |
| Friday | 46°F | Mostly Sunny | 2 to 8 mph SW | 1% |
| Friday Night | 32°F | Partly Cloudy | 5 mph W | 1% |
| Saturday | 50°F | Mostly Sunny | 5 mph SW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 6 mph S | 0% |
| Sunday | 53°F | Mostly Sunny | 7 mph SSW | 0% |
| Sunday Night | 35°F | Partly Cloudy | 6 mph W | 0% |
| Monday | 53°F | Mostly Sunny | 5 mph SW | 1% |
| Monday Night | 35°F | Partly Cloudy | 2 to 6 mph W | 3% |
| Tuesday | 52°F | Mostly Sunny | 2 to 6 mph W | 8% |
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 Nov 4, 2026.