Arco, ID Weather & Growing Conditions
Today
61°F
Chance Light Rain then Slight Chance Showers And Thunderstorms
A chance of rain before 3pm, then a slight chance of showers and thunderstorms between 3pm and 4pm. Partly sunny, with a high near 61. East southeast wind around 6 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 61°F | Chance Light Rain then Slight Chance Showers And Thunderstorms | 6 mph ESE | 46% |
| Tonight | 38°F | Partly Cloudy | 5 mph N | 6% |
| Sunday | 68°F | Mostly Sunny | 6 mph ESE | 1% |
| Sunday Night | 41°F | Mostly Clear | 3 to 7 mph ESE | 0% |
| Monday | 73°F | Sunny | 9 mph ENE | 0% |
| Monday Night | 44°F | Partly Cloudy | 3 to 7 mph ENE | 0% |
| Tuesday | 75°F | Mostly Sunny | 9 mph ENE | 0% |
| Tuesday Night | 44°F | Partly Cloudy | 7 mph NW | 11% |
| Wednesday | 76°F | Sunny | 6 to 9 mph ENE | 3% |
| Wednesday Night | 44°F | Mostly Clear | 5 to 9 mph NE | 4% |
| Thursday | 78°F | Sunny | 9 mph ENE | 2% |
| Thursday Night | 45°F | Partly Cloudy | 5 to 10 mph ENE | 2% |
| Friday | 79°F | Mostly Sunny | 8 to 12 mph ENE | 5% |
| Friday Night | 44°F | Partly Cloudy | 7 to 15 mph WSW | 13% |
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 Sep 19, 2026.