Checking current alerts… View NWS forecast and alerts.
Will it freeze in Hudson in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 31°F (Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST).
Tonight: forecast low 31°F. Freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
6 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 31°F Freeze · Mostly Cloudy
- Fri, Nov 6 26°F Hard freeze · Partly Cloudy then Patchy Fog
- Sat, Nov 7 35°F Frost possible · Mostly Clear
- Sun, Nov 8 36°F Frost possible · Mostly Clear
- Mon, Nov 9 38°F Above 36°F · Mostly Clear
- Tue, Nov 10 35°F Frost possible · Partly Cloudy
- Wed, Nov 11 36°F Frost possible · Partly Cloudy
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Hudson
The median first fall hard-freeze date (28°F) is October 30, from NOAA’s 1991–2020 Climate Normals at Stillwater 1 SE. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Apr 19 · May 2 · May 17 | Sep 25 · Oct 8 · Oct 23 | 158 days |
| 32°F freeze | Apr 7 · Apr 22 · May 6 | Oct 3 · Oct 19 · Nov 3 | 178 days |
| 28°F hard freeze | Mar 31 · Apr 12 · Apr 27 | Oct 15 · Oct 30 · Nov 11 | 199 days |
Average high temperature by month
1991–2020 normals at Stillwater 1 SE
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Hudson, WI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Stillwater 1 SE (station USC00218037, elevation 710 ft), 6.3 mi from Hudson. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Hudson
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Stillwater, MN | 8.1 mi | Apr 30 | Oct 11 |
| River Falls, WI | 8.7 mi | May 11 | Oct 1 |
| Lake Elmo, MN | 8.7 mi | Apr 30 | Oct 11 |
| Woodbury, MN | 11 mi | Apr 26 | Oct 12 |
| Oakdale, MN | 12 mi | Apr 26 | Oct 12 |
| Mahtomedi, MN | 14 mi | Apr 30 | Oct 11 |
| North St. Paul, MN | 14 mi | Apr 26 | Oct 12 |
| Cottage Grove, MN | 14 mi | Apr 23 | Oct 19 |
| New Richmond, WI | 14 mi | Apr 22 | Oct 19 |
| Newport, MN | 14 mi | Apr 24 | Oct 16 |
Frequently asked questions
When is the last frost in Hudson?
On average, the last spring frost (32°F) in Hudson is around April 22. In about 1 year in 10 it comes after May 6, and in 9 years in 10 it comes after April 7.
When is the first frost in Hudson?
The first fall frost (32°F) usually arrives around October 19. There’s a 10% chance of a freeze by October 3 and a 90% chance by November 3.
Can it frost in Hudson after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after May 2.
What growing zone is Hudson?
Hudson is in USDA Plant Hardiness Zone 4b (average annual extreme minimum temperature −25 to −20°F), based on the 2023 USDA map for ZIP code 54016. See growing zones in Wisconsin.
More: all Wisconsin frost dates · Wisconsin growing zones · frost vs. freeze