Poston, AZ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Poston, a community in La Paz County, Arizona.
This Afternoon
99°F
Sunny
Sunny. High near 99, with temperatures falling to around 97 in the afternoon. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
7-day forecast for Poston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Sunny | 5 to 10 mph SSW | 0% |
| Tonight | 69°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Saturday | 99°F | Sunny | 0 to 5 mph WSW | 0% |
| Saturday Night | 68°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Sunday | 99°F | Mostly Sunny | 0 to 5 mph ESE | 0% |
| Sunday Night | 73°F | Mostly Cloudy | 5 mph SSE | 0% |
| Monday | 98°F | Mostly Sunny | 5 to 10 mph SE | 1% |
| Monday Night | 70°F | Mostly Clear | 5 to 10 mph SSE | 2% |
| Tuesday | 98°F | Sunny | 0 to 5 mph ESE | 3% |
| Tuesday Night | 71°F | Mostly Clear | 0 to 5 mph ENE | 1% |
| Wednesday | 101°F | Sunny | 0 to 5 mph E | 2% |
| Wednesday Night | 74°F | Mostly Clear | 0 to 5 mph E | 5% |
| Thursday | 102°F | Mostly Sunny | 5 to 10 mph E | 11% |
| Thursday Night | 76°F | Partly Cloudy | 5 mph ESE | 11% |
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 Sep 18, 2026.