Frost Dates for San Antonio/Seaworld, TX

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. February 18
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. December 9
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.

Last Spring Frost February 28
First Fall Frost November 29

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze January 31
First Fall Hard Freeze December 29
29.45°N, -98.70°W © OpenStreetMap

Growing Season

295 Days February 18 to December 9

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 9a

Learn more

Temperature

40° 60° 80° 100°
54°
High: 65°
Avg: 54°
Low: 43°
Jan
58°
High: 70°
Avg: 58°
Low: 46°
Feb
64°
High: 76°
Avg: 64°
Low: 53°
Mar
71°
High: 83°
Avg: 71°
Low: 60°
Apr
78°
High: 89°
Avg: 78°
Low: 67°
May
84°
High: 95°
Avg: 84°
Low: 73°
Jun
86°
High: 97°
Avg: 86°
Low: 74°
Jul
86°
High: 99°
Avg: 86°
Low: 74°
Aug
81°
High: 93°
Avg: 81°
Low: 70°
Sep
73°
High: 85°
Avg: 73°
Low: 62°
Oct
63°
High: 74°
Avg: 63°
Low: 51°
Nov
55°
High: 66°
Avg: 55°
Low: 44°
Dec
Avg High Avg Temp Avg Low

Precipitation

0" 3" 6" 8.3"
2.5"
2.55"
Jan
2.3"
2.29"
Feb
2.9"
2.86"
Mar
3.6"
3.65"
Apr
6.2"
6.18"
May
8.3"
8.35"
Jun
7.7"
7.69"
Jul
5.6"
5.63"
Aug
5.5"
5.52"
Sep
6.4"
6.44"
Oct
3.3"
3.33"
Nov
2.1"
2.08"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec10h11h12h13h13h14h14h13h12h11h10h10h
Jan: 6:51 AM – 5:09 PM · 10h 18m
Feb: 6:31 AM – 5:29 PM · 10h 59m
Mar: 6:06 AM – 5:54 PM · 11h 47m
Apr: 5:39 AM – 6:21 PM · 12h 43m
May: 5:16 AM – 6:44 PM · 13h 29m
Jun: 5:04 AM – 6:56 PM · 13h 53m
Jul: 5:09 AM – 6:51 PM · 13h 43m
Aug: 5:28 AM – 6:32 PM · 13h 04m
Sep: 5:55 AM – 6:05 PM · 12h 10m
Oct: 6:22 AM – 5:38 PM · 11h 16m
Nov: 6:45 AM – 5:15 PM · 10h 30m
Dec: 6:56 AM – 5:04 PM · 10h 07m
Daylight Longest: 13h 53m · Shortest: 10h 07m

Nearby Stations

San Antonio Kelly Afb, TX February 22 - December 2 San Antonio Incarnate Word, TX February 25 - November 28 San Antonio Intl AP, TX February 26 - November 28 San Antonio Stinson AP, TX February 20 - December 3 Lytle 3w, TX February 24 - December 2 Boerne, TXMarch 15 - November 13

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