Frost dates for 54817Birchwood, WI
Frost is possible in any month near Birchwood, based on NOAA 1991-2020 records for the Couderay 7 W, WI station.
Frost is possible in any month. Even summer nights can drop to freezing at this station, so protect tender plants whenever cold nights are forecast.
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | — | — | 79 days | 100% |
| Frost / freeze (32°F) | — | — | 100 days | 100% |
| Hard freeze (28°F) | Apr 30 · May 22 · Jun 12 | Sep 2 · Sep 24 · Oct 10 | 124 days | 100% |
Where these dates come from
ZIP code 54817 is matched to the NOAA station Couderay 7 W, WI, 20 km away, at 1,300 ft elevation (40 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Couderay 7 W, WI (used) | 1,300 ft | — | — |
| Weyerhaeuser 1N, WI | 1,195 ft | May 9 | Sep 29 |
| Rice Lake, WI | 1,103 ft | May 8 | Oct 2 |
| Spooner Ag Res Stn, WI | 1,100 ft | May 14 | Sep 28 |
Frost dates near Birchwood
- Mikana, WI 54857 · last May 8, first Oct 2
- Brill, WI 54818 · last May 8, first Oct 2
- Edgewater, WI 54834 · last —, first —
- Haugen, WI 54841 · last May 5, first Oct 4
- Sarona, WI 54870 · last May 14, first Sep 28
- Rice Lake, WI 54868 · last May 8, first Oct 2
- Stone Lake, WI 54876 · last —, first —
- Weyerhaeuser, WI 54895 · last May 9, first Sep 29
Frequently asked questions
- When is the last frost in Birchwood, WI?
- Frost is possible in any month at the nearest NOAA station (Couderay 7 W, WI), so there is no reliable average last frost date.
- When is the first frost in Birchwood, WI?
- Frost is possible in any month at the nearest NOAA station.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.