Swan Valley, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Swan Valley, a city in Bonneville County, Idaho.
This Afternoon
63°F
Scattered Showers And Thunderstorms
Scattered showers and thunderstorms. Partly sunny. High near 63, with temperatures falling to around 61 in the afternoon. West southwest wind around 5 mph. Chance of precipitation is 40%.
7-day forecast for Swan Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Scattered Showers And Thunderstorms | 5 mph WSW | 40% |
| Tonight | 37°F | Scattered Rain Showers | 0 to 5 mph ENE | 43% |
| Sunday | 66°F | Mostly Sunny | 0 to 5 mph WNW | 5% |
| Sunday Night | 37°F | Mostly Clear | 3 mph E | 0% |
| Monday | 74°F | Sunny | 0 to 7 mph E | 0% |
| Monday Night | 41°F | Mostly Clear | 2 to 6 mph E | 0% |
| Tuesday | 77°F | Mostly Sunny | 1 to 10 mph S | 2% |
| Tuesday Night | 45°F | Slight Chance Showers And Thunderstorms then Chance Light Rain | 2 to 6 mph SSW | 29% |
| Wednesday | 75°F | Mostly Sunny | 3 to 9 mph SSW | 14% |
| Wednesday Night | 44°F | Mostly Clear | 3 to 9 mph SSE | 3% |
| Thursday | 79°F | Sunny | 2 to 14 mph S | 3% |
| Thursday Night | 46°F | Mostly Clear | 0 to 10 mph SSE | 1% |
| Friday | 79°F | Mostly Sunny | 7 to 15 mph SSE | 5% |
| Friday Night | 46°F | Slight Chance Light Rain then Partly Cloudy | 3 to 9 mph S | 15% |
Forecast source: National Weather Service (api.weather.gov) for Swan Valley (43.443, -111.325). Updated through the day.
Growing snapshot for Swan Valley
Growing season
69 days
Hardiness zone
6a
More local growing data for Swan Valley: nearby ZIP 83449 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Swan Valley, Id (4 mi from Swan Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.