Frost dates for Orange Muni Airport, MA
At Orange Muni Airport, the median last spring frost (32°F) is May 4 and the median first fall frost is Oct 8, for a typical growing season of 157 days. For a 90% chance that the last frost has passed, wait until May 17. Nearby ZIP codes are in USDA hardiness zones 5b to 6a.
- May 4Last spring frost (median)50% chance of 32°F after this date
- May 17Safer planting date10% chance of 32°F after this date
- Oct 8First fall frost (median)50% chance of 32°F by this date
- 157 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | May 2 | May 16 | May 29 |
| 32°F | Apr 23 | May 4 | May 17 |
| 28°F | Apr 10 | Apr 23 | May 6 |
| 24°F | Mar 30 | Apr 9 | Apr 22 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Sep 16 | Sep 28 | Oct 9 |
| 32°F | Sep 27 | Oct 8 | Oct 23 |
| 28°F | Oct 5 | Oct 20 | Nov 4 |
| 24°F | Oct 16 | Nov 1 | Nov 15 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 117 days | 134 days | 153 days |
| 32°F | 139 days | 157 days | 175 days |
| 28°F | 160 days | 179 days | 200 days |
| 24°F | 184 days | 205 days | 224 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 01364 | 5b | -15 to -10°F | 4 km |
| 01380 | 5b | -15 to -10°F | 10 km |
| 01379 | 5b | -15 to -10°F | 10 km |
| 01344 | 6a | -10 to -5°F | 12 km |
| 01366 | 6a | -10 to -5°F | 13 km |
| 01355 | 5b | -15 to -10°F | 13 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00054756, at 42.5700, -72.2911, elevation 169 m (555 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 161.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tully Lake (9 km)
- Birch Hill Dam (15 km)
- Leverett #2 (24 km)
- Greenfield #3 (25 km)
- Barre Falls Dam (27 km)
- Amherst (29 km)
- Ashburnham N (31 km)
- Ashburnham (31 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.