Arco, ID Weather & Growing Conditions
Today
84°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 84. Southeast wind 6 to 16 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Areas Of Smoke | 6 to 16 mph SE | 0% |
| Tonight | 52°F | Areas Of Smoke | 7 to 20 mph NW | 0% |
| Wednesday | 89°F | Areas Of Smoke | 6 to 14 mph SSW | 0% |
| Wednesday Night | 55°F | Mostly Clear | 8 to 17 mph WNW | 0% |
| Thursday | 96°F | Sunny | 6 to 15 mph WNW | 0% |
| Thursday Night | 60°F | Clear | 7 to 20 mph WNW | 0% |
| Friday | 97°F | Sunny | 6 to 17 mph WNW | 0% |
| Friday Night | 61°F | Mostly Clear | 8 to 22 mph WNW | 0% |
| Saturday | 97°F | Sunny | 6 to 20 mph WNW | 0% |
| Saturday Night | 62°F | Mostly Clear | 7 to 22 mph WNW | 0% |
| Sunday | 95°F | Sunny | 7 to 23 mph SW | 0% |
| Sunday Night | 60°F | Mostly Clear | 7 to 25 mph W | 0% |
| Monday | 94°F | Sunny | 7 to 22 mph WSW | 0% |
| Monday Night | 59°F | Mostly Clear | 8 to 24 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Arco, ID
Last spring frost
May 24
First fall frost
Oct 1
Growing season
130 days
Hardiness zone
5a
Explore more for Arco, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Arco 17 Sw, Id (9.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.