Frost dates for Pittsfield Muni Airport, MA
At Pittsfield Muni Airport, the median last spring frost (32°F) is May 5 and the median first fall frost is Oct 5, for a typical growing season of 152 days. For a 90% chance that the last frost has passed, wait until May 21. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 5Last spring frost (median)50% chance of 32°F after this date
- May 21Safer planting date10% chance of 32°F after this date
- Oct 5First fall frost (median)50% chance of 32°F by this date
- 152 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 4 | May 19 | Jun 2 |
| 32°F | Apr 23 | May 5 | May 21 |
| 28°F | Apr 8 | Apr 23 | May 9 |
| 24°F | Mar 29 | Apr 9 | 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 12 | Sep 26 | Oct 7 |
| 32°F | Sep 23 | Oct 5 | Oct 22 |
| 28°F | Oct 2 | Oct 18 | Nov 4 |
| 24°F | Oct 15 | Nov 1 | 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 | 110 days | 129 days | 148 days |
| 32°F | 133 days | 152 days | 171 days |
| 28°F | 155 days | 177 days | 199 days |
| 24°F | 182 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 |
|---|---|---|---|
| 01201 | 5b | -15 to -10°F | 3 km |
| 01240 | 5b | -15 to -10°F | 5 km |
| 01254 | 5b | -15 to -10°F | 8 km |
| 12125 | 5b | -15 to -10°F | 11 km |
| 01224 | 5b | -15 to -10°F | 11 km |
| 12029 | 5b | -15 to -10°F | 11 km |
| 01226 | 5b | -15 to -10°F | 13 km |
| 01237 | 5b | -15 to -10°F | 14 km |
| 12195 | 5b | -15 to -10°F | 16 km |
| 12168 | 5b | -15 to -10°F | 18 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 USW00014763, at 42.4272, -73.2892, elevation 364 m (1,194 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 153.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lenox Dale (11 km)
- Worthington (31 km)
- North Adams Harriman Airport (31 km)
- E Hawley (38 km)
- Rowe 3ne (49 km)
- Westfield 3 SW (55 km)
- Westfield Barnes Muni Airport (56 km)
- Greenfield #3 (59 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.