Annex, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Annex, a community in Washington County, Oregon.
This Afternoon
78°F
Mostly Sunny
Mostly sunny, with a high near 78. West wind around 5 mph.
7-day forecast for Annex
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Mostly Sunny | 5 mph W | 7% |
| Tonight | 52°F | Slight Chance Showers And Thunderstorms | 5 mph NW | 23% |
| Saturday | 82°F | Sunny | 3 mph NW | 4% |
| Saturday Night | 51°F | Mostly Clear | 3 mph N | 0% |
| Sunday | 84°F | Sunny | 2 mph ESE | 0% |
| Sunday Night | 52°F | Mostly Clear | 1 mph ENE | 0% |
| Monday | 85°F | Sunny | 1 mph S | 0% |
| Monday Night | 53°F | Mostly Clear | 1 mph N | 0% |
| Tuesday | 86°F | Sunny | 1 mph SSE | 0% |
| Tuesday Night | 52°F | Mostly Clear | 1 mph NE | 1% |
| Wednesday | 84°F | Sunny | 2 mph WNW | 1% |
| Wednesday Night | 52°F | Mostly Clear | 1 mph NNE | 1% |
| Thursday | 87°F | Sunny | 0 to 3 mph SE | 0% |
| Thursday Night | 54°F | Partly Cloudy | 2 mph NE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Annex (44.234, -116.992). Updated through the day.
Growing snapshot for Annex
Last spring frost
Apr 23
First fall frost
Oct 13
Growing season
174 days
Hardiness zone
7a
More local growing data for Annex: nearby ZIP 83672 weather · frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Weiser, Id (8.9 mi from Annex). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.