Ashton, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ashton, a city in Fremont County, Idaho.
Tonight
40°F
Scattered Showers And Thunderstorms
Scattered showers and thunderstorms before 2am. Mostly cloudy. Low around 40, with temperatures rising to around 44 overnight. East southeast wind 0 to 5 mph. Chance of precipitation is 40%.
7-day forecast for Ashton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Scattered Showers And Thunderstorms | 0 to 5 mph ESE | 36% |
| Sunday | 66°F | Mostly Sunny | 1 to 5 mph SW | 4% |
| Sunday Night | 39°F | Mostly Clear | 1 to 5 mph ENE | 1% |
| Monday | 72°F | Sunny | 1 to 6 mph SE | 0% |
| Monday Night | 40°F | Mostly Clear | 2 to 6 mph E | 0% |
| Tuesday | 75°F | Mostly Sunny | 2 to 7 mph S | 1% |
| Tuesday Night | 45°F | Slight Chance Showers And Thunderstorms then Slight Chance Light Rain | 5 mph ESE | 23% |
| Wednesday | 74°F | Mostly Sunny | 5 to 8 mph SSE | 8% |
| Wednesday Night | 44°F | Mostly Clear | 5 mph ESE | 3% |
| Thursday | 78°F | Sunny | 3 to 7 mph S | 2% |
| Thursday Night | 46°F | Mostly Clear | 2 to 7 mph E | 1% |
| Friday | 77°F | Sunny | 7 mph SE | 4% |
| Friday Night | 46°F | Partly Cloudy | 6 mph SE | 9% |
| Saturday | 73°F | Mostly Sunny | 5 to 8 mph SSE | 13% |
Forecast source: National Weather Service (api.weather.gov) for Ashton (44.073, -111.448). Updated through the day.
Growing snapshot for Ashton
Last spring frost
May 21
First fall frost
Sep 21
Growing season
121 days
Hardiness zone
5a
More local growing data for Ashton: nearby ZIP 83421 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ashton 1N, Id (6.6 mi from Ashton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.