Lewiston, UT Weather & Growing Conditions
Tonight
40°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. Low around 40, with temperatures rising to around 46 overnight. North northeast wind 0 to 3 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Chance Showers And Thunderstorms | 0 to 3 mph NNE | 34% |
| Saturday | 66°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph WSW | 54% |
| Saturday Night | 37°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph NNE | 23% |
| Sunday | 71°F | Sunny | 2 mph N | 0% |
| Sunday Night | 39°F | Mostly Clear | 2 mph ENE | 0% |
| Monday | 77°F | Sunny | 2 mph N | 0% |
| Monday Night | 43°F | Partly Cloudy | 2 mph ENE | 1% |
| Tuesday | 77°F | Mostly Sunny | 2 mph NNW | 5% |
| Tuesday Night | 44°F | Slight Chance Showers And Thunderstorms | 2 mph SE | 18% |
| Wednesday | 78°F | Sunny | 2 mph S | 7% |
| Wednesday Night | 43°F | Mostly Clear | 2 mph E | 4% |
| Thursday | 80°F | Sunny | 2 mph SSE | 3% |
| Thursday Night | 46°F | Partly Cloudy | 3 mph SE | 5% |
| Friday | 80°F | Mostly Sunny | 3 mph S | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lewiston, UT
Last spring frost
May 11
First fall frost
Oct 5
Growing season
143 days
Hardiness zone
6a
Explore more for Lewiston, UT: full frost dates · planting calendar · Utah frost dates
Climate data from the nearest NOAA station, Richmond, Ut (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.