Frost dates for Ada 2nne Mesonet, OK
At Ada 2nne Mesonet, the median last spring frost (32°F) is Mar 31 and the median first fall frost is Nov 3, for a typical growing season of 216 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zone 7b.
- Mar 31Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 3First 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 | Mar 25 | Apr 12 | Apr 29 |
| 32°F | Mar 10 | Mar 31 | Apr 18 |
| 28°F | Feb 26 | Mar 14 | Apr 3 |
| 24°F | Feb 11 | Mar 3 | Mar 20 |
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 10 | Oct 25 | Nov 8 |
| 32°F | Oct 19 | Nov 3 | Nov 19 |
| 28°F | Oct 25 | Nov 12 | Dec 2 |
| 24°F | Nov 3 | Nov 25 | Dec 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 | 173 days | 194 days | 217 days |
| 32°F | 192 days | 216 days | 242 days |
| 28°F | 212 days | 240 days | 267 days |
| 24°F | 237 days | 266 days | 293 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 |
|---|---|---|---|
| 74844 | 7b | 5 to 10°F | 11 km |
| 74849 | 7b | 5 to 10°F | 21 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 USC00340027, at 34.7986, -96.6692, elevation 295 m (967 ft).
- Data quality: Representative (10+ years), 12 years of freeze data.
- Average days per year at or below 32°F: 71.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ada (2 km)
- Fittstown 6sw Mesonet (28 km)
- Byars 3ese Mesonet (31 km)
- Sulphur 4nne Mesonet (36 km)
- Centrahoma 1e Mesonet (37 km)
- Holdenville 2sse (39 km)
- Centrahoma 2 ESE (39 km)
- Holdenville 3ese Mesonet (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.