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Will it freeze in Havre de Grace in the next 7 nights?
No overnight lows at or below 32°F are forecast in Havre de Grace during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 60°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 60°F Above 36°F · Chance Showers And Thunderstorms
- Fri, Nov 6 49°F Above 36°F · Partly Cloudy
- Sat, Nov 7 44°F Above 36°F · Mostly Clear
- Sun, Nov 8 41°F Above 36°F · Mostly Clear
- Mon, Nov 9 41°F Above 36°F · Mostly Clear
- Tue, Nov 10 41°F Above 36°F · Mostly Clear
- Wed, Nov 11 38°F Above 36°F · 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 Havre de Grace
The median first fall hard-freeze date (28°F) is November 10, from NOAA’s 1991–2020 Climate Normals at Aberdeen Phillips Field. 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 9 · Apr 27 · May 12 | Oct 5 · Oct 19 · Nov 1 | 175 days |
| 32°F freeze | Mar 27 · Apr 10 · Apr 30 | Oct 14 · Oct 30 · Nov 12 | 201 days |
| 28°F hard freeze | Mar 13 · Mar 29 · Apr 12 | Oct 28 · Nov 10 · Nov 27 | 226 days |
Average high temperature by month
1991–2020 normals at Aberdeen Phillips Field
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 Havre de Grace, MD come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Aberdeen Phillips Field (station USW00013701, elevation 57 ft), 6.0 mi from Havre de Grace. 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 Havre de Grace
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Aberdeen, MD | 3.7 mi | Apr 10 | Oct 30 |
| Bel Air, MD | 12 mi | Apr 10 | Oct 30 |
| Elkton, MD | 16 mi | Apr 7 | Nov 2 |
| Oxford, PA | 18 mi | Apr 26 | Oct 22 |
| Newark, DE | 21 mi | Apr 7 | Nov 2 |
| Middletown, DE | 22 mi | Apr 7 | Nov 2 |
| Chestertown, MD | 23 mi | Apr 3 | Nov 5 |
| Kennett Square, PA | 30 mi | Apr 19 | Oct 26 |
| New Castle, DE | 30 mi | Apr 7 | Nov 1 |
| Elsmere, DE | 30 mi | Apr 7 | Nov 4 |
Frequently asked questions
When is the last frost in Havre de Grace?
On average, the last spring frost (32°F) in Havre de Grace is around April 10. In about 1 year in 10 it comes after April 30, and in 9 years in 10 it comes after March 27.
When is the first frost in Havre de Grace?
The first fall frost (32°F) usually arrives around October 30. There’s a 10% chance of a freeze by October 14 and a 90% chance by November 12.
Can it frost in Havre de Grace 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 27.
What growing zone is Havre de Grace?
Havre de Grace is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 21078. See growing zones in Maryland.
More: all Maryland frost dates · Maryland growing zones · frost vs. freeze