Harman US

Prospect, OR Weather & Growing Conditions

This Afternoon
75°F
Sunny
Sunny. High near 75, with temperatures falling to around 73 in the afternoon. Northwest wind around 6 mph.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 75°F Sunny 6 mph NW 0%
Tonight 43°F Clear 2 to 7 mph NW 0%
Saturday 80°F Sunny 1 to 7 mph ENE 0%
Saturday Night 46°F Mostly Clear 2 to 6 mph NNW 0%
Sunday 84°F Sunny 1 to 6 mph WNW 0%
Sunday Night 47°F Mostly Clear 2 to 6 mph NNE 0%
Monday 79°F Sunny 5 mph NNW 0%
Monday Night 45°F Mostly Clear 5 mph N 0%
Tuesday 75°F Sunny 5 mph NNW 0%
Tuesday Night 42°F Mostly Clear 5 mph NNE 0%
Wednesday 77°F Sunny 3 mph NW 0%
Wednesday Night 46°F Mostly Clear 3 mph NNE 0%
Thursday 80°F Sunny 3 mph WNW 1%
Thursday Night 44°F Partly Cloudy 3 mph NNE 4%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Prospect, OR

Last spring frost
May 19
First fall frost
Oct 3
Growing season
136 days
Hardiness zone
8a

Explore more for Prospect, OR: full frost dates · planting calendar · Oregon frost dates

Climate data from the nearest NOAA station, Prospect 2 Sw, Or (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.