San Marcos weather in September 2025

The temperatures in San Marcos in September are comfortable with low of 19°C and and high up to 28°C.

There shouldn't be any rainy days in in San Marcos during September. Having said that, the days are very hot in September so hanging out outside is more recomanded during the after noons and evening time.

Our weather forecast can give you a great sense of what weather to expect in San Marcos in September 2025.

If you’re planning to visit San Marcos in the near future, we highly recommend that you review the 14 day weather forecast for San Marcos before you arrive.

Temperatures

28° / 19°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

11.4

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 30° /20°	2 30° /20°	3 30° /19°	4 29° /20°	5 31° /20°	6 32° /20°
7 33° /21°	8 34° /23°	9 32° /23°	10 28° /21°	11 28° /19°	12 26° /18°	13 26° /17°
14 25° /16°	15 25° /16°	16 24° /16°	17 23° /16°	18 23° /16°	19 23° /15°	20 23° /15°
21 24° /15°	22 25° /15°	23 26° /17°	24 27° /17°	25 27° /17°	26 27° /17°	27 27° /18°
28 28° /17°	29 27° /17°	30 24° /16°

Explore the weather in San Marcos in other months

San Marcos annual weather

Month	Temperatures	Rainy Days	Dry Days	Rainfall	Weather	More details
January	19° / 10°	2	29	41 mm	Good	San Marcos in January
February	19° / 10°	2	26	46 mm	Good	San Marcos in February
March	19° / 10°	2	29	34 mm	Good	San Marcos in March
April	21° / 11°	0	30	15 mm	Good	San Marcos in April
May	22° / 13°	1	30	14 mm	Good	San Marcos in May
June	25° / 15°	0	30	3 mm	Perfect	San Marcos in June
July	28° / 18°	1	30	14 mm	Perfect	San Marcos in July
August	29° / 19°	1	30	10 mm	Good	San Marcos in August
September	28° / 19°	0	30	9 mm	Perfect	San Marcos in September
October	25° / 16°	0	31	11 mm	Perfect	San Marcos in October
November	22° / 13°	1	29	27 mm	Good	San Marcos in November
December	18° / 10°	3	28	49 mm	Good	San Marcos in December

Temperatures in San Marcos in September

Rain in San Marcos in September

Weather in San Marcos in September - FAQ

What is the average temperature in San Marcos in September?

The average temperature in San Marcos in September is 19/28° C.

What is the chance of rain in San Marcos in September?

On average, there are 0 rainy days in San Marcos during September.

Weather wise, is September a good time to visit San Marcos?

The weather in San Marcos in September is perfect.

Can it snow in San Marcos in September?

On average, there are 0 snowy days in San Marcos in September.

More about the weather in San Marcos