Frost dates for Westfield Barnes Muni Airport, MA
At Westfield Barnes Muni Airport, the median last spring frost (32°F) is May 3 and the median first fall frost is Oct 8, for a typical growing season of 158 days. For a 90% chance that the last frost has passed, wait until May 17. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- May 3Last 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
- 158 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 6a (-10 to -5°F) · see all zone 6a frost dates
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 1 | May 14 | May 28 |
| 32°F | Apr 20 | May 3 | May 17 |
| 28°F | Apr 6 | Apr 21 | May 5 |
| 24°F | Mar 23 | Apr 5 | Apr 21 |
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 30 | Oct 11 |
| 32°F | Sep 26 | Oct 8 | Oct 25 |
| 28°F | Oct 6 | Oct 20 | Nov 5 |
| 24°F | Oct 17 | Nov 2 | Nov 17 |
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 | 121 days | 138 days | 156 days |
| 32°F | 139 days | 158 days | 179 days |
| 28°F | 163 days | 184 days | 205 days |
| 24°F | 188 days | 209 days | 230 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 |
|---|---|---|---|
| 01085 | 6a | -10 to -5°F | 5 km |
| 01089 | 6a | -10 to -5°F | 7 km |
| 01073 | 6a | -10 to -5°F | 8 km |
| 01040 | 6a | -10 to -5°F | 9 km |
| 01030 | 6b | -5 to 0°F | 10 km |
| 01107 | 6b | -5 to 0°F | 10 km |
| 01013 | 6a | -10 to -5°F | 10 km |
| 01103 | 6b | -5 to 0°F | 12 km |
| 01144 | 6b | -5 to 0°F | 12 km |
| 01104 | 6a | -10 to -5°F | 13 km |
| 01020 | 6a | -10 to -5°F | 13 km |
| 01001 | 6b | -5 to 0°F | 13 km |
| 01105 | 6b | -5 to 0°F | 13 km |
| 01109 | 6a | -10 to -5°F | 14 km |
| 01022 | 6a | -10 to -5°F | 15 km |
| 01108 | 6b | -5 to 0°F | 15 km |
| 01027 | 6a | -10 to -5°F | 16 km |
| 01151 | 6a | -10 to -5°F | 17 km |
| 01118 | 6b | -5 to 0°F | 17 km |
| 01119 | 6a | -10 to -5°F | 17 km |
| 01129 | 6a | -10 to -5°F | 19 km |
| 01128 | 6a | -10 to -5°F | 20 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 USW00014775, at 42.1578, -72.7161, elevation 83 m (271 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 144.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Westfield 3 SW (10 km)
- Amherst (29 km)
- Worthington (31 km)
- Belchertown (33 km)
- Leverett #2 (36 km)
- Greenfield #3 (47 km)
- E Hawley (48 km)
- Lenox Dale (48 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.