Lewisville, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewisville, a city in Jefferson County, Idaho.
Today
63°F
Slight Chance Light Rain then Slight Chance Showers And Thunderstorms
A slight chance of rain before noon, then a slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny, with a high near 63. South southwest wind around 6 mph. Chance of precipitation is 20%.
7-day forecast for Lewisville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 63°F | Slight Chance Light Rain then Slight Chance Showers And Thunderstorms | 6 mph SSW | 20% |
| Tonight | 39°F | Partly Cloudy | 3 mph S | 6% |
| Sunday | 68°F | Mostly Sunny | 2 mph SW | 2% |
| Sunday Night | 39°F | Mostly Clear | 2 to 6 mph ESE | 0% |
| Monday | 74°F | Sunny | 2 to 6 mph NNE | 0% |
| Monday Night | 41°F | Mostly Clear | 2 to 6 mph NE | 0% |
| Tuesday | 75°F | Mostly Sunny | 2 to 6 mph NNE | 0% |
| Tuesday Night | 44°F | Partly Cloudy | 5 mph E | 11% |
| Wednesday | 76°F | Mostly Sunny | 5 mph SSE | 7% |
| Wednesday Night | 44°F | Mostly Clear | 2 to 6 mph SE | 2% |
| Thursday | 79°F | Sunny | 2 to 6 mph SE | 2% |
| Thursday Night | 45°F | Mostly Clear | 2 to 6 mph ESE | 1% |
| Friday | 79°F | Mostly Sunny | 6 mph E | 1% |
| Friday Night | 46°F | Partly Cloudy | 7 mph S | 8% |
Forecast source: National Weather Service (api.weather.gov) for Lewisville (43.696, -112.014). Updated through the day.
Growing snapshot for Lewisville
Last spring frost
May 9
First fall frost
Oct 5
Growing season
148 days
Hardiness zone
5a
More local growing data for Lewisville: nearby ZIP 83431 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Rigby, Id (6.1 mi from Lewisville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.