Annex, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Annex, a community in Washington County, Oregon.
Tonight
32°F
Mostly Cloudy
Mostly cloudy. Low around 32, with temperatures rising to around 36 overnight. Northwest wind around 2 mph.
7-day forecast for Annex
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 32°F | Mostly Cloudy | 2 mph NW | 11% |
| Wednesday | 59°F | Sunny | 2 mph NW | 1% |
| Wednesday Night | 32°F | Mostly Cloudy then Slight Chance Rain Showers | 1 mph ENE | 17% |
| Thursday | 56°F | Slight Chance Rain Showers then Partly Sunny | 1 mph N | 17% |
| Thursday Night | 28°F | Mostly Clear | 1 mph NNE | 2% |
| Friday | 54°F | Areas Of Fog then Partly Sunny | 1 mph ENE | 2% |
| Friday Night | 30°F | Partly Cloudy | 1 mph N | 1% |
| Saturday | 60°F | Mostly Sunny | 2 mph NNE | 1% |
| Saturday Night | 33°F | Partly Cloudy | 1 mph N | 0% |
| Sunday | 60°F | Partly Sunny | 1 mph N | 0% |
| Sunday Night | 33°F | Mostly Cloudy | 1 mph NNW | 2% |
| Monday | 59°F | Patchy Fog then Partly Sunny | 1 mph ENE | 4% |
| Monday Night | 33°F | Mostly Cloudy | 0 mph | 5% |
| Tuesday | 61°F | Areas Of Fog then Mostly Sunny | 1 mph ENE | 10% |
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 Nov 4, 2026.