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Will it freeze in Nashua in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Mon, Nov 9: 32°F (Mon, Nov 9, 6:00 PM EST to Tue, Nov 10, 6:00 AM EST).
Tonight: forecast low 59°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 59°F Above 36°F · Patchy Fog
- Fri, Nov 6 53°F Above 36°F · Light Rain Likely
- Sat, Nov 7 41°F Above 36°F · Light Rain Likely
- Sun, Nov 8 35°F Frost possible · Mostly Clear
- Mon, Nov 9 32°F Freeze · Mostly Clear
- Tue, Nov 10 34°F Frost possible · Mostly Clear
- Wed, Nov 11 26°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 Nashua
The median first fall hard-freeze date (28°F) is October 20, from NOAA’s 1991–2020 Climate Normals at Nashua Cwsu. 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 29 · May 10 · May 23 | Sep 21 · Oct 1 · Oct 12 | 143 days |
| 32°F freeze | Apr 16 · Apr 29 · May 11 | Sep 28 · Oct 8 · Oct 25 | 162 days |
| 28°F hard freeze | Apr 3 · Apr 16 · Apr 28 | Oct 6 · Oct 20 · Nov 5 | 185 days |
Average high temperature by month
1991–2020 normals at Nashua Cwsu
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 Nashua, NH come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Nashua Cwsu (station USC00275703, elevation 180 ft), 1.1 mi from Nashua. 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 Nashua
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Lowell, MA | 11 mi | Apr 30 | Oct 10 |
| Methuen, MA | 16 mi | Apr 13 | Oct 28 |
| Manchester, NH | 16 mi | Apr 30 | Oct 11 |
| Lawrence, MA | 17 mi | Apr 13 | Oct 28 |
| Fitchburg, MA | 19 mi | May 1 | Oct 9 |
| Haverhill, MA | 21 mi | May 1 | Oct 12 |
| Leominster, MA | 21 mi | Apr 29 | Oct 11 |
| Woburn, MA | 25 mi | Apr 25 | Oct 17 |
| Marlborough, MA | 28 mi | May 2 | Oct 6 |
| Gardner, MA | 28 mi | May 2 | Oct 13 |
Frequently asked questions
When is the last frost in Nashua?
On average, the last spring frost (32°F) in Nashua is around April 29. In about 1 year in 10 it comes after May 11, and in 9 years in 10 it comes after April 16.
When is the first frost in Nashua?
The first fall frost (32°F) usually arrives around October 8. There’s a 10% chance of a freeze by September 28 and a 90% chance by October 25.
Can it frost in Nashua 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 10.
What growing zone is Nashua?
Nashua is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 03060. See growing zones in New Hampshire.
More: all New Hampshire frost dates · New Hampshire growing zones · UV index today in Nashua · frost vs. freeze