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
59°F
Sunny
Sunny, with a high near 59. West wind around 5 mph.
7-day forecast for New Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Sunny | 5 mph W | 1% |
| Tonight | 36°F | Mostly Cloudy | 2 mph SSE | 9% |
| Thursday | 56°F | Partly Sunny | 0 to 6 mph WNW | 8% |
| Thursday Night | 30°F | Mostly Clear then Patchy Fog | 3 mph SW | 0% |
| Friday | 54°F | Patchy Fog then Mostly Sunny | 1 mph ENE | 0% |
| Friday Night | 30°F | Partly Cloudy | 1 mph W | 0% |
| Saturday | 58°F | Mostly Sunny | 0 to 3 mph E | 0% |
| Saturday Night | 35°F | Partly Cloudy | 3 mph ESE | 0% |
| Sunday | 60°F | Mostly Sunny | 0 to 3 mph SW | 0% |
| Sunday Night | 34°F | Mostly Cloudy then Areas Of Fog | 0 mph | 0% |
| Monday | 59°F | Areas Of Fog then Partly Sunny | 1 mph N | 0% |
| Monday Night | 34°F | Mostly Cloudy then Areas Of Fog | 0 mph | 2% |
| Tuesday | 61°F | Areas Of Fog then Mostly Sunny | 1 mph NNW | 9% |
| Tuesday Night | 36°F | Partly Cloudy | 2 mph E | 10% |
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 Nov 4, 2026.