Last frost date in Forest Grove, Oregon
April 16
Average last frost in spring. In an early year (1 in 10) it's over by March 26; in a late year (1 in 10) it comes after May 5.
October 26
Average first frost in fall. 1 year in 10 it comes by October 6.
Source: NOAA U.S. Climate Normals 1991–2020, station Forest Grove (USC00352997), 0.4 miles from Forest Grove, elevation 180 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Cornelius, so its frost dates are the same as Forest Grove's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 26 | Apr 16 | May 5 |
| First frost in fall | Oct 6 | Oct 26 | Nov 14 |
Frost-free days in an average year: 192
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 4 | Oct 8 |
| Frost (32°F) | Every year | Apr 16 | Oct 26 |
| Hard freeze (28°F) | Every year | Mar 19 | Nov 11 |
Nights at 32°F or colder in an average year: 61
What to plant now in Forest Grove
- Corn saladSept 15 – Nov 1Now
- Upland cressSept 15 – Nov 1Now
- Rhubarb plantsNov 1 – Dec 1Soon
- Asparagus plantsNov 15 – Jan 1Soon
- Spring planting calendar for an average last frost around April 20 Forest Grove: April 16
- Fall planting calendar for an average first frost around October 30 Forest Grove: October 26
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Oregon
- Hillsboro 8 mi · last frost Apr 16
- Beaverton 15 mi · last frost Apr 1
- Newberg 17 mi · last frost Mar 21
- Lake Oswego 21 mi · last frost Mar 18
- McMinnville 22 mi · last frost Apr 5
Updated