Frost dates for Bellingham 3 SSW, WA
At Bellingham 3 SSW, the median last spring frost (32°F) is Apr 1 and the median first fall frost is Nov 2, for a typical growing season of 216 days. For a 90% chance that the last frost has passed, wait until Apr 24. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Apr 1Last spring frost (median)50% chance of 32°F after this date
- Apr 24Safer planting date10% chance of 32°F after this date
- Nov 2First fall frost (median)50% chance of 32°F by this date
- 216 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 | Apr 8 | Apr 27 | May 11 |
| 32°F | Mar 11 | Apr 1 | Apr 24 |
| 28°F | Feb 11 | Mar 6 | Mar 27 |
| 24°F | Jan 7 | Feb 15 | Mar 10 |
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 | Oct 2 | Oct 18 | Nov 5 |
| 32°F | Oct 15 | Nov 2 | Nov 23 |
| 28°F | Nov 1 | Nov 21 | Dec 16 |
| 24°F | Nov 14 | Dec 9 | Jan 14 |
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 | 153 days | 177 days | 200 days |
| 32°F | 188 days | 216 days | 243 days |
| 28°F | 229 days | 257 days | 291 days |
| 24°F | 264 days | 302 days | 343 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 98% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 98225 | 8b | 15 to 20°F | 5 km |
| 98229 | 8a | 10 to 15°F | 8 km |
| 98262 | 8b | 15 to 20°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 USC00450587, at 48.7178, -122.5114, elevation 5 m (15 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 43.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bellingham Intl Airport (9 km)
- Anacortes (24 km)
- Olga 2 SE (25 km)
- Clearbrook (31 km)
- Sedro-Woolley (32 km)
- Mount Vernon 3 WNW (32 km)
- Blaine (35 km)
- Whidbey Island NAS (42 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.