Frost dates for 78550Harlingen, TX
Frost occurs in about 31% of years near Harlingen, based on NOAA 1991-2020 records for the Harlingen, TX station.
Frost occurs in about 31% of years. Frost-tender plants can usually grow year-round, but cover them if a rare cold snap is forecast.
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Dec 17 · Jan 21 · Feb 28 | Nov 29 · Dec 26 · Feb 2 | 340 days | 79% |
| Frost / freeze (32°F) | Dec 15 · Jan 9 · Feb 4 | Dec 9 · Jan 3 · Jan 29 | 365 days | 31% |
| Hard freeze (28°F) | — | — | 365 days | 5% |
Where these dates come from
ZIP code 78550 is matched to the NOAA station Harlingen, TX, 1.8 km away, at 38 ft elevation (1 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Harlingen, TX (used) | 38 ft | Jan 9 | Jan 3 |
| Harlingen Rio Grande Ap, TX | 34 ft | Jan 8 | Dec 29 |
| Santa Rosa 3 Wnw, TX | 50 ft | Jan 10 | Dec 27 |
| Weslaco, TX | 75 ft | Jan 8 | Dec 31 |
Frost dates near Harlingen
- Harlingen, TX 78553 · last Jan 9, first Jan 3
- Combes, TX 78535 · last Jan 9, first Jan 3
- San Benito, TX 78586 · last Jan 9, first Jan 3
- La Feria, TX 78559 · last Jan 10, first Dec 27
- Rio Hondo, TX 78583 · last Jan 8, first Dec 29
- Lozano, TX 78568 · last Jan 8, first Dec 29
- Santa Rosa, TX 78593 · last Jan 10, first Dec 27
- Los Indios, TX 78567 · last Jan 9, first Jan 3
Frequently asked questions
- When is the last frost in Harlingen, TX?
- Frost occurs in about 31% of years at the nearest NOAA station (Harlingen, TX), so there is no reliable average last frost date.
- When is the first frost in Harlingen, TX?
- Frost occurs in about 31% of years at the nearest NOAA station.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.