Frost Dates for Katy, TX
In Katy, TX, the average last spring frost is around Feb 2 and the average first fall frost around Dec 11, for a growing season of about 318 days. For frost-tender plants, wait until Mar 7, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Houston Sugarland Mem, TX weather station, 16 miles away, elevation 82 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Mar 7 | Nov 20 |
| 20% | Feb 27 | Nov 27 |
| 30% | Feb 20 | Dec 3 |
| 40% | Feb 11 | Dec 6 |
| 50% | Feb 2 | Dec 11 |
| 60% | Jan 28 | Dec 19 |
| 70% | Jan 20 | Dec 27 |
| 80% | Jan 11 | Jan 5 |
| 90% | Dec 28 | Jan 16 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | Feb 26 | Nov 27 |
| Frost / freeze (32°F) | Feb 2 | Dec 11 |
| Hard freeze (28°F) | Jan 18 | Jan 1 |
Planting calendar for Katy
Transplant Feb 9 – Feb 23
Transplant Feb 16 – Mar 2
Transplant Feb 16 – Mar 2
Transplant Feb 9 – Feb 23
Sow or transplant Feb 9 – Feb 23
Sow or transplant Feb 9 – Feb 23
Sow or transplant Feb 16 – Mar 2
Sow or transplant Jan 5 – Jan 19
Fall sowing Oct 16 – Nov 13
Fall sowing Oct 16 – Nov 6
Fall sowing Oct 2 – Oct 16
Sow or transplant Jan 5 – Jan 19
Fall sowing Oct 2 – Oct 30
Transplant Jan 19 – Feb 2
Fall sowing Sep 18 – Oct 2
Transplant Jan 12 – Jan 26
Fall sowing Sep 18 – Oct 2
Fall sowing Sep 18 – Oct 2
Fall sowing Oct 30 – Nov 20
Fall sowing Oct 2 – Oct 16
Plant Jan 5 – Jan 19
Based on the average last frost (Feb 2) and first frost (Dec 11). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.