New Plymouth, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Plymouth, a city in Payette County, Idaho.
Today
90°F
Smoke
Smoke. Sunny, with a high near 90. West wind around 3 mph.
7-day forecast for New Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Smoke | 3 mph W | 0% |
| Tonight | 55°F | Smoke | 2 mph WSW | 0% |
| Wednesday | 93°F | Smoke | 2 mph S | 0% |
| Wednesday Night | 58°F | Areas Of Smoke | 2 mph SSE | 0% |
| Thursday | 100°F | Areas Of Smoke | 1 mph SE | 0% |
| Thursday Night | 62°F | Areas Of Smoke | 0 to 3 mph SW | 0% |
| Friday | 101°F | Sunny | 2 mph WNW | 0% |
| Friday Night | 64°F | Mostly Clear | 2 to 7 mph NW | 0% |
| Saturday | 100°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 64°F | Mostly Clear | 3 to 7 mph NW | 0% |
| Sunday | 96°F | Sunny | 6 mph NW | 0% |
| Sunday Night | 61°F | Mostly Clear | 7 mph NNW | 0% |
| Monday | 94°F | Sunny | 6 mph NW | 0% |
| Monday Night | 60°F | Mostly Clear | 6 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for New Plymouth (43.970, -116.819). Updated through the day.
Growing snapshot for New Plymouth
Last spring frost
Apr 22
First fall frost
Oct 9
Growing season
168 days
Hardiness zone
7a
More local growing data for New Plymouth: nearby ZIP 83655 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ontario Ksrv, Or (11.1 mi from New Plymouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.