Frost dates for Monroe Airport, NC
At Monroe Airport, the median last spring frost (32°F) is Mar 31 and the median first fall frost is Nov 5, for a typical growing season of 220 days. For a 90% chance that the last frost has passed, wait until Apr 16. Nearby ZIP codes are in USDA hardiness zone 8a.
- Mar 31Last spring frost (median)50% chance of 32°F after this date
- Apr 16Safer planting date10% chance of 32°F after this date
- Nov 5First fall frost (median)50% chance of 32°F by this date
- 220 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 | Mar 26 | Apr 12 | Apr 26 |
| 32°F | Mar 11 | Mar 31 | Apr 16 |
| 28°F | Feb 24 | Mar 16 | Apr 5 |
| 24°F | Feb 3 | Mar 1 | Mar 23 |
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 14 | Oct 27 | Nov 7 |
| 32°F | Oct 23 | Nov 5 | Nov 19 |
| 28°F | Nov 2 | Nov 16 | Dec 5 |
| 24°F | Nov 12 | Dec 2 | Jan 1 |
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 | 178 days | 197 days | 217 days |
| 32°F | 199 days | 220 days | 244 days |
| 28°F | 220 days | 246 days | 273 days |
| 24°F | 248 days | 276 days | 314 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 |
|---|---|---|---|
| 28104 | 8a | 10 to 15°F | 8 km |
| 28108 | 8a | 10 to 15°F | 11 km |
| 28079 | 8a | 10 to 15°F | 11 km |
| 28105 | 8a | 10 to 15°F | 14 km |
| 28173 | 8a | 10 to 15°F | 15 km |
| 28270 | 8a | 10 to 15°F | 17 km |
| 28277 | 8a | 10 to 15°F | 18 km |
| 28227 | 8a | 10 to 15°F | 19 km |
| 29720 | 8a | 10 to 15°F | 32 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 USW00053872, at 35.0169, -80.6206, elevation 207 m (679 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 57.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Monroe 2 SE (10 km)
- Charlotte Douglas Airport (38 km)
- Concord (44 km)
- Wadesboro (50 km)
- Gastonia Muni Airport (53 km)
- Gastonia (55 km)
- Albemarle (57 km)
- Salisbury (75 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.
All North Carolina stations · How frost dates are calculated