Last frost date in Boerne, TX

Average last frost
March 15

In Boerne, the last spring frost comes around March 15 in an average year. Wait until April 8 if you want 90% odds of no more frost. The first fall frost usually arrives about November 13, which leaves 243 frost-free days. An early freeze before October 31 happens one year in ten.

Safe after (10% risk)
Apr 8
Average first frost
Nov 13
Frost-free season
243 days
Hard freeze (28°F) ends
Mar 2
Next 7 nights in Boerne

No frost in the next 7 nights

National Weather Service forecast, updated Oct 22, 12:57 UTC

  1. ThuOct 2255°
  2. FriOct 2357°
  3. SatOct 2459°
  4. SunOct 2556°
  5. MonOct 2659°
  6. TueOct 2755°
  7. WedOct 2856°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Mar 15First frost Nov 13243 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND243 frost-free days
Frost risk through the year at Boerne, 1.0 miles from Boerne.

Planting calendar for Boerne

Windows count forward or back from the average frost dates above. Click a crop for dates across Texas.

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesMar 22–Apr 5
PumpkinsMar 29–Apr 12
SunflowersMar 15–Apr 5
CucumbersMar 29–Apr 5
CornMar 22–Apr 5
Sweet potatoesApr 5–Apr 19
WatermelonMar 29–Apr 12
Green beansMar 22–Apr 12
ZucchiniMar 22–Apr 5
OkraApr 5–Apr 19
PeppersMar 29–Apr 12
BasilMar 22–Apr 5
Butternut squashMar 22–Apr 5
CantaloupeMar 29–Apr 12
EggplantMar 29–Apr 12
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesFeb 15–Mar 1
OnionsFeb 1–Feb 22
CarrotsFeb 22–Mar 29
LettuceMar 1–Mar 22
BroccoliFeb 15–Mar 1
BeetsFeb 15–Mar 29
PeasFeb 1–Feb 15
CabbageFeb 15–Mar 1
RadishesFeb 8–Mar 22
Brussels sproutsMar 1–Mar 15
SpinachFeb 1–Feb 22
CilantroMar 1–Mar 22
KaleFeb 15–Mar 1
Collard greensFeb 15–Mar 1
TurnipsFeb 15–Mar 1
DillMar 15–Mar 29
CeleryMar 22–Mar 29
CauliflowerMar 1–Mar 15
LeeksMar 1–Mar 15
Swiss chardMar 1–Mar 29
ParsleyMar 1–Mar 22
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 30–Dec 4
GarlicOct 23–Nov 27
Daffodil bulbsOct 16–Nov 27
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesFeb 15–Mar 1
AsparagusFeb 15–Mar 1

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FFeb 23Mar 15Apr 8Oct 31Nov 13Dec 4
Hard freeze, 28°FJan 31Mar 2Mar 23Nov 5Nov 27Dec 21

Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.

Where these numbers come from

NOAA station Boerne (USC00410902) sits 1.0 miles from the center of Boerne at 1,445 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.

Questions

When is the last frost in Boerne, TX?

The average last frost date in Boerne is March 15, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 8.

When is the first frost in Boerne?

The first frost in fall usually comes around November 13. One year in ten it arrives before October 31.

How long is the growing season in Boerne?

About 243 days between the average last and first frost.

When should I plant tomatoes in Boerne?

Plant tomato seedlings outside from March 22 to April 5. Start seeds indoors six to eight weeks earlier.

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