Frost dates for Thompsons 3 WSW, Texas
Half of years have their last spring frost by February 15, but 1 year in 10 still frosts after March 15.
A frost date is really a percentile from 30 years of records at a nearby weather station: in about half of years a frost still comes after the median date. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
How often a frost still comes on or after each date.
- 1 year in 10
- March 15
- 1 year in 5
- March 6
- 3 years in 10
- March 1
- 2 years in 5
- February 23
- Half of years (the median)
- February 15
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- November 13
- 1 year in 5
- November 21
- 3 years in 10
- November 27
- 2 years in 5
- December 2
- Half of years (the median)
- December 6
- Growing season
- about 297 days
- Hardiness zones nearby
- 9a, 9b
- Summer days
- a usual high of about 33 °C92 °F
- Lettuce and spinach run to seed
- April to September, in hot, long days (how we know)
Summer and rain
A growing garden needs about 25 mm1 in of water a week, rain and watering together. Here is what a normal month brings.
- Hot-weather watering
- June to August: days run above 32 °C90 °F and nights stay above 21 °C70 °F, so expect to water daily or every other day (how we know)
Month by month
- January
- high ~17 °C63 °F · low ~6 °C43 °F · rain ~105 mm4.1 in
- February
- high ~19 °C67 °F · low ~8 °C47 °F · rain ~77 mm3 in
- March
- high ~22 °C72 °F · low ~12 °C53 °F · rain ~87 mm3.4 in
- April
- high ~26 °C79 °F · low ~15 °C58 °F · rain ~92 mm3.6 in
- May
- high ~30 °C85 °F · low ~19 °C66 °F · rain ~125 mm4.9 in
- June
- high ~32 °C90 °F · low ~22 °C72 °F · rain ~118 mm4.6 in
- July
- high ~33 °C92 °F · low ~23 °C74 °F · rain ~97 mm3.8 in
- August
- high ~34 °C93 °F · low ~23 °C74 °F · rain ~114 mm4.5 in
- September
- high ~32 °C89 °F · low ~21 °C70 °F · rain ~124 mm4.9 in
- October
- high ~28 °C82 °F · low ~16 °C61 °F · rain ~133 mm5.2 in
- November
- high ~22 °C72 °F · low ~11 °C52 °F · rain ~103 mm4.1 in
- December
- high ~18 °C65 °F · low ~8 °C46 °F · rain ~100 mm3.9 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Thompsons 3 WSW station (listed by NOAA as Thompsons 3 WSW, USC00418996), at 29.48, -95.63. These are that station’s own records, unshifted. The further your garden is from it, the less exactly they describe your ground. The planner finds the nearest station to your garden and lowers its confidence with distance, so no number is presented as if it were measured in your garden.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a few hundred feet away does not. No table can know that about your garden. A few seasons of your own logged frosts can.
ZIP codes nearest this station
77417, 77444, 77451, 77459, 77461, 77469, 77481, 77545, 77583.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Houston Sugarland Mem, TX, last frost by February 2
- Houston-Port, TX, last frost by February 2
- Conroe Montgomery County Airport, TX, last frost by March 11
Other stations in Texas.
- Austin 6 S, TX, last frost by March 10
- New Braunfels, TX, last frost by March 8
- Dallas Redbird Airport, TX, last frost by March 6
- Dallas Love Field, TX, last frost by March 2
- Fort Worth, TX, last frost by March 10
- Denton Municipal Airport, TX, last frost by March 24
When do I plant? · Where the dates come from
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