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Will it freeze in Lake Geneva in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 28°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
Tonight: forecast low 35°F. Frost possible.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
5 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 35°F Frost possible · Mostly Cloudy
- Fri, Nov 6 28°F Hard freeze · Mostly Clear
- Sat, Nov 7 32°F Freeze · Partly Cloudy
- Sun, Nov 8 34°F Frost possible · Mostly Clear
- Mon, Nov 9 39°F Above 36°F · Mostly Clear
- Tue, Nov 10 37°F Above 36°F · 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 Lake Geneva
The median first fall hard-freeze date (28°F) is November 1, from NOAA’s 1991–2020 Climate Normals at Lake Geneva Wastewater Plant. 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 21 · May 5 · May 21 | Sep 24 · Oct 9 · Oct 23 | 156 days |
| 32°F freeze | Apr 10 · Apr 25 · May 10 | Oct 5 · Oct 21 · Nov 3 | 179 days |
| 28°F hard freeze | Mar 31 · Apr 12 · Apr 28 | Oct 16 · Nov 1 · Nov 15 | 203 days |
Average high temperature by month
1991–2020 normals at Lake Geneva Wastewater Plant
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 Lake Geneva, WI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Lake Geneva Wastewater Plant (station USC00474457, elevation 846 ft), 1.2 mi from Lake Geneva. 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 Lake Geneva
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Bloomfield, WI | 4.3 mi | Apr 30 | Oct 13 |
| Elkhorn, WI | 8.1 mi | Apr 28 | Oct 14 |
| Twin Lakes, WI | 9.9 mi | Apr 30 | Oct 13 |
| Burlington, WI | 9.9 mi | May 5 | Oct 9 |
| Delavan, WI | 11 mi | Apr 28 | Oct 14 |
| Spring Grove, IL | 13 mi | Apr 30 | Oct 13 |
| Harvard, IL | 14 mi | Apr 28 | Oct 12 |
| Wonder Lake, IL | 15 mi | May 1 | Oct 11 |
| Salem Lakes, WI | 16 mi | Apr 30 | Oct 15 |
| Fox Lake, IL | 16 mi | Apr 23 | Oct 21 |
Frequently asked questions
When is the last frost in Lake Geneva?
On average, the last spring frost (32°F) in Lake Geneva is around April 25. In about 1 year in 10 it comes after May 10, and in 9 years in 10 it comes after April 10.
When is the first frost in Lake Geneva?
The first fall frost (32°F) usually arrives around October 21. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 3.
Can it frost in Lake Geneva 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 5.
What growing zone is Lake Geneva?
Lake Geneva is in USDA Plant Hardiness Zone 5b (average annual extreme minimum temperature −15 to −10°F), based on the 2023 USDA map for ZIP code 53147. See growing zones in Wisconsin.
More: all Wisconsin frost dates · Wisconsin growing zones · frost vs. freeze