San Antonio weather by month

Check out San Antonio weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in San Antonio (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
16°C maximum daytime temperature in January in San Antonio16
19°C maximum daytime temperature in February in San Antonio19
23°C maximum daytime temperature in March in San Antonio23
27°C maximum daytime temperature in April in San Antonio27
30°C maximum daytime temperature in May in San Antonio30
33°C maximum daytime temperature in June in San Antonio33
35°C maximum daytime temperature in July in San Antonio35
35°C maximum daytime temperature in August in San Antonio35
32°C maximum daytime temperature in September in San Antonio32
28°C maximum daytime temperature in October in San Antonio28
22°C maximum daytime temperature in November in San Antonio22
18°C maximum daytime temperature in December in San Antonio18
Min temperature (night-time)
3°C minimum night-time temperature in January in San Antonio3
5°C minimum night-time temperature in February in San Antonio5
10°C minimum night-time temperature in March in San Antonio10
15°C minimum night-time temperature in April in San Antonio15
19°C minimum night-time temperature in May in San Antonio19
22°C minimum night-time temperature in June in San Antonio22
23°C minimum night-time temperature in July in San Antonio23
23°C minimum night-time temperature in August in San Antonio23
21°C minimum night-time temperature in September in San Antonio21
15°C minimum night-time temperature in October in San Antonio15
9°C minimum night-time temperature in November in San Antonio9
5°C minimum night-time temperature in December in San Antonio5
Heat & Humidity
No heat & humidity in January in San Antonio0
No heat & humidity in February in San Antonio0
No heat & humidity in March in San Antonio0
Low heat & humidity in April in San AntonioL
High heat & humidity in May in San AntonioH
Very high heat & humidity in June in San AntonioVH
Very high heat & humidity in July in San AntonioVH
Very high heat & humidity in August in San AntonioVH
High heat & humidity in September in San AntonioH
Low heat & humidity in October in San AntonioL
No heat & humidity in November in San Antonio0
No heat & humidity in December in San Antonio0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in San Antonio

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
11 hours of daylight per day in January in San Antonio11
11 hours of daylight per day in February in San Antonio11
12 hours of daylight per day in March in San Antonio12
13 hours of daylight per day in April in San Antonio13
14 hours of daylight per day in May in San Antonio14
14 hours of daylight per day in June in San Antonio14
14 hours of daylight per day in July in San Antonio14
13 hours of daylight per day in August in San Antonio13
12 hours of daylight per day in September in San Antonio12
11 hours of daylight per day in October in San Antonio11
11 hours of daylight per day in November in San Antonio11
10 hours of daylight per day in December in San Antonio10
UV Index (Maximum)
UV (maximum) index 4 (Moderate) in January in San Antonio4
UV (maximum) index 6 (High) in February in San Antonio6
UV (maximum) index 8 (Very High) in March in San Antonio8
UV (maximum) index 10 (Very High) in April in San Antonio10
UV (maximum) index 11 (Extreme) in May in San Antonio11
UV (maximum) index 11 (Extreme) in June in San Antonio11
UV (maximum) index 11 (Extreme) in July in San Antonio11
UV (maximum) index 11 (Extreme) in August in San Antonio11
UV (maximum) index 10 (Very High) in September in San Antonio10
UV (maximum) index 7 (High) in October in San Antonio7
UV (maximum) index 5 (Moderate) in November in San Antonio5
UV (maximum) index 4 (Moderate) in December in San Antonio4

Rainfall in San Antonio

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
7 days with some rainfall in January in San Antonio7
7 days with some rainfall in February in San Antonio7
6 days with some rainfall in March in San Antonio6
7 days with some rainfall in April in San Antonio7
8 days with some rainfall in May in San Antonio8
6 days with some rainfall in June in San Antonio6
5 days with some rainfall in July in San Antonio5
5 days with some rainfall in August in San Antonio5
7 days with some rainfall in September in San Antonio7
6 days with some rainfall in October in San Antonio6
6 days with some rainfall in November in San Antonio6
7 days with some rainfall in December in San Antonio7
Average monthly rainfall (mm)
38 mm monthly rainfall in January in San Antonio38
53 mm monthly rainfall in February in San Antonio53
37 mm monthly rainfall in March in San Antonio37
59 mm monthly rainfall in April in San Antonio59
94 mm monthly rainfall in May in San Antonio94
73 mm monthly rainfall in June in San Antonio73
39 mm monthly rainfall in July in San Antonio39
55 mm monthly rainfall in August in San Antonio55
90 mm monthly rainfall in September in San Antonio90
73 mm monthly rainfall in October in San Antonio73
50 mm monthly rainfall in November in San Antonio50
38 mm monthly rainfall in December in San Antonio38

More about San Antonio

San Antonio by month

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

Recommended for San Antonio

Omega Breaks: Iceland 2026 solar eclipse cruises

  • Book Iceland 2026 solar eclipse cruises with Omega breaks
  • Incl FREE coach travel to Dundee & flight options available
  • Travel between 1st Mar 2026 & 31st Aug 2024 (inclusive)
Go to Omega Breaks deal >>

View all Omega Breaks offers

The climate guide for Texas (San Antonio) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in San Antonio?

San Antonio has a temperate climate with hot summers and some rainfall in all months.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Tropical storm risk: San Antonio, Texas hurricane season

% of month affected by tropical storms
0
0
0
0
0
1.2%
<1%
1.3%
2.1%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

Back to top

More about the USA

Compare San Antonio with the USA

Below the San Antonio chart shows average maximum daytime temperature for San Antonio, Texas, USA and the USA (Washington).

Maximum daytime temperature (°C)

San Antonio, Texas, USA
USA (Washington)
16
5
19
7
23
13
27
19
30
24
33
29
35
31
35
30
32
26
28
20
22
14
18
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more San Antonio weather >>

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^