Frost dates in Killeen, Texas
NOAA 1991–2020 normals for a 32 °F freeze. Low spots and the edge of town run colder than downtown.
Short answer
The average last spring frost in Killeen is March 14, and the average first fall frost is November 17, from NOAA's Killeen station, 3 miles from the middle of Killeen. 1 year in 10 the last frost comes after April 4, and the first one by November 1. That leaves about 248 frost-free days. Killeen is in USDA planting zone 8b.
Weather stations around Killeen
The first row is the date most people in Killeen go by. The others show how far the dates move across the area.
| Station | Last spring frost | First fall frost | Frost-free |
|---|---|---|---|
| Killeen 3 mi away, 815 ft | March 14 1 in 10 after April 4 | November 17 1 in 10 by November 1 | 248 days |
| Stillhouse Hollow Dam 12 mi away, 706 ft | March 14 1 in 10 after April 4 | November 20 1 in 10 by October 29 | 251 days |
| Gatesville 23 mi away, 826 ft | March 19 1 in 10 after April 7 | November 9 1 in 10 by October 25 | 235 days |
| Lampasas 27 mi away, 1,032 ft | March 22 1 in 10 after April 10 | November 12 1 in 10 by October 29 | 235 days |
| Georgetown Lake 28 mi away, 874 ft | March 6 1 in 10 after March 30 | November 24 1 in 10 by November 5 | 263 days |
Distances are from the middle of Killeen as the Census Bureau maps it. The average date is NOAA's 50% date: half of years have a later last frost, or an earlier first one. Plan by the 1-in-10 date if a freeze would cost you plants. The planting zone is the USDA 2023 zone for ZIP code 76541, at the middle of the city.
Your exact ZIP code
Killeen covers a lot of ground. For the station nearest your own street, and its planting zone, type your ZIP code.
How these dates work
Frost dates come from NOAA's 1991 to 2020 Climate Normals, which work out from each weather station's daily lows how likely the last spring freeze and the first fall freeze (32 °F) are by each date. We use the station nearest the middle of your ZIP code and show its height and distance, since a station on a hill or by a lake can differ from your yard.
The average date is the 50% date: half of years have a freeze after the spring date or before the fall one. The 1-in-10 dates are NOAA's 10% dates, the ones to plan by if a late freeze would cost you plants. Within one yard, cold air pools in low spots while walls and paving hold heat, so some corners freeze before others.
More frost dates
All of Texas, station by station.
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Where the numbers come from
- USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture
- PRISM Climate Group, Oregon State University (zone data)
- NOAA NCEI, U.S. Climate Normals 1991–2020, annual/seasonal
- NOAA, Normals calculation methodology (frost-freeze probability dates)
- US Census Bureau, 2025 ZCTA gazetteer (ZIP code centers)
- US Census Bureau, 2025 city population estimates and place gazetteer