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Will it freeze in Brunswick in the next 7 nights?
No overnight lows at or below 32°F are forecast in Brunswick during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 57°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 57°F Above 36°F · Chance Rain Showers then Mostly Cloudy
- Fri, Nov 6 46°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 41°F Above 36°F · Slight Chance Light Rain then Partly Cloudy
- Sun, Nov 8 38°F Above 36°F · Mostly Clear
- Mon, Nov 9 36°F Frost possible · Mostly Clear
- Tue, Nov 10 38°F Above 36°F · Mostly Clear
- Wed, Nov 11 35°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 Brunswick
The median first fall hard-freeze date (28°F) is October 30, from NOAA’s 1991–2020 Climate Normals at Sharpsburg 5 S. 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 22 · May 7 · May 24 | Sep 26 · Oct 9 · Oct 22 | 153 days |
| 32°F freeze | Apr 11 · Apr 26 · May 15 | Oct 5 · Oct 18 · Nov 2 | 175 days |
| 28°F hard freeze | Mar 29 · Apr 11 · Apr 29 | Oct 14 · Oct 30 · Nov 13 | 201 days |
Average high temperature by month
1991–2020 normals at Sharpsburg 5 S
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 Brunswick, MD come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Sharpsburg 5 S (station USC00188207, elevation 400 ft), 7.5 mi from Brunswick. 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 Brunswick
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Middletown, MD | 9.9 mi | Apr 2 | Nov 6 |
| Purcellville, VA | 13 mi | Apr 16 | Oct 25 |
| Ranson, WV | 14 mi | Apr 20 | Oct 22 |
| Frederick, MD | 14 mi | Apr 2 | Nov 6 |
| Charles Town, WV | 14 mi | Apr 20 | Oct 22 |
| Leesburg, VA | 15 mi | Apr 16 | Oct 25 |
| Poolesville, MD | 17 mi | Apr 13 | Oct 26 |
| Walkersville, MD | 17 mi | Apr 2 | Nov 6 |
| Martinsburg, WV | 21 mi | Apr 17 | Oct 23 |
| Hagerstown, MD | 23 mi | Apr 11 | Oct 28 |
Frequently asked questions
When is the last frost in Brunswick?
On average, the last spring frost (32°F) in Brunswick is around April 26. In about 1 year in 10 it comes after May 15, and in 9 years in 10 it comes after April 11.
When is the first frost in Brunswick?
The first fall frost (32°F) usually arrives around October 18. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 2.
Can it frost in Brunswick 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 7.
What growing zone is Brunswick?
Brunswick 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 21716. See growing zones in Maryland.
More: all Maryland frost dates · Maryland growing zones · frost vs. freeze