San Antonio Climate & Weather Guide

Average temperatures, rainfall and conditions through the year, based on 20 years of historical data.

Climate Overview

San Antonio experiences its warmest weather in August, with average highs reaching 35.7°C (96.3°F). The coolest month is typically January, averaging 17.1°C (62.8°F). Rainfall is heaviest in May (around 136.5mm), while December tends to be the driest month of the year with approximately 48.7mm of precipitation.

35.7°C (96.3°F)

Hottest month avg high

17.1°C (62.8°F)

Coolest month avg high

137mm

Wettest month avg

49mm

Driest month avg

Temperature by Month

Rainfall by Month

Sunshine Hours

Monthly Averages

Month	Avg High	Avg Low	Rainfall	Rainy Days	Sunshine
Jan	17.1°C (62.8°F)	6.5°C (43.7°F)	57.5mm	7	7.3h
Feb	19.6°C (67.3°F)	8.4°C (47.1°F)	50mm	7	7.3h
Mar	24.1°C (75.4°F)	12.8°C (55°F)	68.8mm	9	8.2h
Apr	27.4°C (81.3°F)	16.3°C (61.3°F)	83.5mm	10	9.4h
May	30.5°C (86.9°F)	20.1°C (68.2°F)	136.5mm	13	10.2h
Jun	33.9°C (93°F)	23.4°C (74.1°F)	65.8mm	9	11.8h
Jul	34.8°C (94.6°F)	24.3°C (75.7°F)	71.3mm	8	11.9h
Aug	35.7°C (96.3°F)	25.1°C (77.2°F)	54.5mm	6	11.9h
Sep	32.2°C (90°F)	22.5°C (72.5°F)	86.9mm	9	10.4h
Oct	28.2°C (82.8°F)	17.7°C (63.9°F)	75.3mm	7	9.4h
Nov	22.1°C (71.8°F)	12.2°C (54°F)	55.9mm	7	7.6h
Dec	18.5°C (65.3°F)	8.5°C (47.3°F)	48.7mm	8	6.7h

What to Pack

Suggested packing for San Antonio's climate.

Versatile Layers

Light layers that work for both mild afternoons and cooler evenings.

Rain Protection

A compact umbrella and a light rain jacket for the wettest months.

Sun Protection

Sunscreen, a wide-brimmed hat and sunglasses for hot, sunny days.

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See San Antonio weather month by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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