Poston, AZ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Poston, a community in La Paz County, Arizona.
Tonight
51°F
Mostly Clear
Mostly clear, with a low around 51. Northeast wind around 0 mph.
7-day forecast for Poston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Clear | 0 mph | 0% |
| Wednesday | 79°F | Sunny | 0 to 5 mph NNW | 0% |
| Wednesday Night | 50°F | Clear | 0 to 5 mph NNW | 0% |
| Thursday | 79°F | Sunny | 5 mph N | 0% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Friday | 82°F | Sunny | 0 to 10 mph N | 0% |
| Friday Night | 52°F | Clear | 5 to 10 mph N | 0% |
| Saturday | 83°F | Sunny | 5 to 10 mph N | 0% |
| Saturday Night | 52°F | Mostly Clear | 0 to 5 mph N | 0% |
| Sunday | 84°F | Sunny | 0 to 5 mph N | 1% |
| Sunday Night | 55°F | Partly Cloudy | 0 to 5 mph NNE | 1% |
| Monday | 83°F | Mostly Sunny | 0 to 5 mph NE | 1% |
| Monday Night | 55°F | Mostly Clear | 0 mph | 2% |
| Tuesday | 83°F | Sunny | 0 to 5 mph NNE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Poston (33.992, -114.404). Updated through the day.
Growing snapshot for Poston
Last spring frost
Jan 12
First fall frost
Dec 19
Growing season
338 days
Hardiness zone
9a
More local growing data for Poston: nearby ZIP 85371 weather · frost dates · planting calendar · Arizona frost dates
Nearby towns & communities
Alamo Lake
Bouse
Brenda
Cibola
Ehrenberg
La Paz Valley
Parker
Quartzsite
Salome
Utting
Vicksburg
Wenden
Climate data from the nearest NOAA station, Parker, Az (14.1 mi from Poston). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.