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Will it freeze in West Haven in the next 7 nights?
No overnight lows at or below 32°F are forecast in West Haven during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 61°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
1 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 61°F Above 36°F · Light Rain Likely then Patchy Fog
- Fri, Nov 6 54°F Above 36°F · Light Rain
- Sat, Nov 7 45°F Above 36°F · Chance Light Rain
- Sun, Nov 8 41°F Above 36°F · Mostly Clear
- Mon, Nov 9 40°F Above 36°F · Mostly Clear
- Tue, Nov 10 41°F Above 36°F · Mostly Clear
- 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 West Haven
The median first fall hard-freeze date (28°F) is November 6, from NOAA’s 1991–2020 Climate Normals at New Haven Tweed Airport. 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 17 · Apr 30 · May 12 | Oct 4 · Oct 15 · Nov 1 | 170 days |
| 32°F freeze | Apr 2 · Apr 17 · May 1 | Oct 11 · Oct 27 · Nov 8 | 193 days |
| 28°F hard freeze | Mar 22 · Apr 4 · Apr 18 | Oct 22 · Nov 6 · Nov 21 | 215 days |
Average high temperature by month
1991–2020 normals at New Haven Tweed Airport
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 West Haven, CT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: New Haven Tweed Airport (station USW00014758, elevation 3 ft), 4.2 mi from West Haven. 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 West Haven
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| New Haven, CT | 3.7 mi | Apr 17 | Oct 27 |
| Milford, CT | 6.2 mi | Apr 5 | Nov 6 |
| Derby, CT | 6.8 mi | Apr 25 | Oct 17 |
| Ansonia, CT | 7.5 mi | Apr 25 | Oct 17 |
| Shelton, CT | 9.3 mi | Apr 25 | Oct 17 |
| Bridgeport, CT | 13 mi | Apr 5 | Nov 6 |
| Naugatuck, CT | 16 mi | Apr 18 | Oct 26 |
| Waterbury, CT | 20 mi | Apr 26 | Oct 16 |
| Meriden, CT | 21 mi | Apr 26 | Oct 16 |
| Port Jefferson, NY | 23 mi | Apr 4 | Nov 7 |
Frequently asked questions
When is the last frost in West Haven?
On average, the last spring frost (32°F) in West Haven is around April 17. In about 1 year in 10 it comes after May 1, and in 9 years in 10 it comes after April 2.
When is the first frost in West Haven?
The first fall frost (32°F) usually arrives around October 27. There’s a 10% chance of a freeze by October 11 and a 90% chance by November 8.
Can it frost in West Haven 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 April 30.
What growing zone is West Haven?
West Haven is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 06516. See growing zones in Connecticut.
More: all Connecticut frost dates · Connecticut growing zones · UV index today in West Haven · frost vs. freeze