Lewiston, UT Weather & Growing Conditions
Today
89°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 89. Northwest wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Patchy Smoke | 2 to 6 mph NW | 0% |
| Tonight | 46°F | Smoke | 1 to 7 mph NNW | 0% |
| Wednesday | 91°F | Areas Of Smoke | 1 to 5 mph NW | 0% |
| Wednesday Night | 52°F | Patchy Smoke | 5 mph E | 0% |
| Thursday | 97°F | Patchy Smoke then Sunny | 0 to 3 mph NW | 0% |
| Thursday Night | 57°F | Clear | 5 mph SSE | 0% |
| Friday | 99°F | Sunny | 1 to 5 mph WNW | 0% |
| Friday Night | 60°F | Mostly Clear | 1 to 7 mph ENE | 0% |
| Saturday | 100°F | Sunny | 0 to 3 mph NNW | 0% |
| Saturday Night | 61°F | Mostly Clear | 2 to 7 mph NE | 0% |
| Sunday | 99°F | Sunny | 1 to 7 mph WNW | 0% |
| Sunday Night | 63°F | Partly Cloudy | 2 to 7 mph ENE | 1% |
| Monday | 97°F | Mostly Sunny | 1 to 6 mph WSW | 2% |
| Monday Night | 61°F | Partly Cloudy | 2 to 7 mph SSE | 5% |
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 Aug 4, 2026.