Island Park, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Island Park, a city in Fremont County, Idaho.
Today
58°F
Light Rain Likely then Chance Showers And Thunderstorms
Rain likely before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers and thunderstorms likely. Mostly cloudy. High near 58, with temperatures falling to around 56 in the afternoon. South southwest wind 1 to 5 mph. Chance of precipitation is 70%.
7-day forecast for Island Park
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 58°F | Light Rain Likely then Chance Showers And Thunderstorms | 1 to 5 mph SSW | 73% |
| Tonight | 37°F | Chance Showers And Thunderstorms then Mostly Cloudy | 3 mph NW | 32% |
| Sunday | 62°F | Partly Sunny | 3 mph W | 14% |
| Sunday Night | 36°F | Partly Cloudy | 2 mph S | 2% |
| Monday | 69°F | Sunny | 5 mph SSW | 0% |
| Monday Night | 38°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Tuesday | 71°F | Sunny | 5 mph S | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 3 mph ESE | 10% |
| Wednesday | 70°F | Mostly Sunny | 1 to 8 mph SE | 8% |
| Wednesday Night | 39°F | Mostly Clear | 1 to 6 mph SE | 3% |
| Thursday | 72°F | Sunny | 2 to 7 mph SE | 2% |
| Thursday Night | 41°F | Mostly Clear | 1 to 5 mph ESE | 1% |
| Friday | 72°F | Mostly Sunny | 3 to 9 mph SE | 3% |
| Friday Night | 41°F | Partly Cloudy | 2 to 6 mph SSE | 10% |
Forecast source: National Weather Service (api.weather.gov) for Island Park (44.534, -111.338). Updated through the day.
Growing snapshot for Island Park
Growing season
49 days
Hardiness zone
4a
More local growing data for Island Park: nearby ZIP 83433 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Island Park, Id (5.8 mi from Island Park). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.