Lewiston, UT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewiston, a city in Cache County, Utah.
Tonight
40°F
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
A chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms. Mostly cloudy. Low around 40, with temperatures rising to around 45 overnight. North northeast wind 1 to 5 mph. Chance of precipitation is 70%.
7-day forecast for Lewiston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 1 to 5 mph NNE | 69% |
| Saturday | 66°F | Mostly Sunny then Showers And Thunderstorms Likely | 1 to 5 mph WNW | 55% |
| Saturday Night | 37°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph N | 21% |
| Sunday | 71°F | Sunny | 2 mph NW | 0% |
| Sunday Night | 38°F | Mostly Clear | 2 mph ENE | 0% |
| Monday | 77°F | Sunny | 2 mph N | 0% |
| Monday Night | 43°F | Partly Cloudy | 2 mph E | 1% |
| Tuesday | 77°F | Mostly Sunny | 3 mph NNW | 4% |
| Tuesday Night | 43°F | Slight Chance Showers And Thunderstorms | 2 mph SE | 16% |
| Wednesday | 78°F | Sunny | 3 mph SSE | 7% |
| Wednesday Night | 43°F | Mostly Clear | 2 mph E | 4% |
| Thursday | 80°F | Sunny | 2 mph SE | 3% |
| Thursday Night | 45°F | Partly Cloudy | 3 mph ESE | 5% |
| Friday | 80°F | Mostly Sunny | 3 mph SSE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Lewiston (41.968, -111.886). Updated through the day.
Growing snapshot for Lewiston
Last spring frost
May 11
First fall frost
Oct 5
Growing season
143 days
Hardiness zone
6a
More local growing data for Lewiston: nearby ZIP 84320 weather · frost dates · planting calendar · Utah frost dates
Nearby towns & communities
Amalga
Avon
Benson
Cache
Clarkston
Cornish
Hyde Park
Hyrum
Logan
Mendon
Millville
Newton
Nibley
North Logan
Paradise
Peter
Providence
Richmond
River Heights
Smithfield
Trenton
Wellsville
Climate data from the nearest NOAA station, Richmond, Ut (3.9 mi from Lewiston). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.