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Will it freeze in Concord in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Mon, Nov 9: 30°F (Mon, Nov 9, 6:00 PM EST to Tue, Nov 10, 6:00 AM EST).
Tonight: forecast low 58°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 58°F Above 36°F · Slight Chance Light Rain then Patchy Fog
- Fri, Nov 6 51°F Above 36°F · Light Rain Likely
- Sat, Nov 7 41°F Above 36°F · Light Rain
- Sun, Nov 8 34°F Frost possible · Partly Cloudy
- Mon, Nov 9 30°F Freeze · Partly Cloudy
- Tue, Nov 10 31°F Freeze · Mostly Clear
- Wed, Nov 11 24°F Hard freeze · 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 Concord
The median first fall hard-freeze date (28°F) is October 13, from NOAA’s 1991–2020 Climate Normals at Concord Municipal 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 | May 7 · May 20 · Jun 3 | Sep 9 · Sep 23 · Oct 5 | 124 days |
| 32°F freeze | Apr 27 · May 8 · May 22 | Sep 21 · Oct 3 · Oct 16 | 146 days |
| 28°F hard freeze | Apr 15 · Apr 27 · May 9 | Oct 1 · Oct 13 · Oct 30 | 169 days |
Average high temperature by month
1991–2020 normals at Concord Municipal 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 Concord, NH come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Concord Municipal Airport (station USW00014745, elevation 346 ft), 4.0 mi from Concord. 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 Concord
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Franklin, NH | 16 mi | May 7 | Oct 3 |
| Manchester, NH | 18 mi | Apr 30 | Oct 11 |
| Laconia, NH | 24 mi | Apr 30 | Oct 18 |
| Rochester, NH | 30 mi | Apr 30 | Oct 9 |
| Nashua, NH | 34 mi | Apr 29 | Oct 8 |
| Somersworth, NH | 34 mi | Apr 30 | Oct 9 |
| Dover, NH | 34 mi | May 3 | Oct 10 |
| Methuen, MA | 39 mi | Apr 13 | Oct 28 |
| Haverhill, MA | 39 mi | May 1 | Oct 12 |
| Claremont, NH | 40 mi | May 14 | Oct 1 |
Frequently asked questions
When is the last frost in Concord?
On average, the last spring frost (32°F) in Concord is around May 8. In about 1 year in 10 it comes after May 22, and in 9 years in 10 it comes after April 27.
When is the first frost in Concord?
The first fall frost (32°F) usually arrives around October 3. There’s a 10% chance of a freeze by September 21 and a 90% chance by October 16.
Can it frost in Concord 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 20.
What growing zone is Concord?
Concord 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 03301. See growing zones in New Hampshire.
More: all New Hampshire frost dates · New Hampshire growing zones · UV index today in Concord · frost vs. freeze