Last frost date in Monroe, Washington
April 17
Average last frost in spring. In an early year (1 in 10) it's over by March 29; in a late year (1 in 10) it comes after May 7.
October 23
Average first frost in fall. 1 year in 10 it comes by October 7.
Source: NOAA U.S. Climate Normals 1991–2020, station Monroe (USC00455525), 1.1 miles from Monroe, elevation 120 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 29 | Apr 17 | May 7 |
| First frost in fall | Oct 7 | Oct 23 | Nov 9 |
Frost-free days in an average year: 188
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 5 | Oct 6 |
| Frost (32°F) | Every year | Apr 17 | Oct 23 |
| Hard freeze (28°F) | Every year | Mar 26 | Nov 8 |
Nights at 32°F or colder in an average year: 60
What to plant now in Monroe
- Spring planting calendar for an average last frost around April 20 Monroe: April 17
- Fall planting calendar for an average first frost around October 20 Monroe: October 23
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 Washington
- Everett 12 mi · last frost Mar 24
- Edmonds 17 mi · last frost Mar 9
- Sammamish 19 mi · last frost Mar 30
- Arlington 23 mi · last frost Apr 22
- Mercer Island 23 mi · last frost Mar 13
Updated