Mexico
Mexico in September
Where it is warm, dry and good for swimming in Mexico in September — compared across the country’s main destinations.
Quick answers
- Where is it warmest in Mexico in September?
- Mexicali is the warmest of the 16 destinations compared, with highs of 39°C (102°F) in September; San Cristóbal de las Casas is the coolest at 23°C (73°F).
- Can you swim in the sea in Mexico in September?
- Yes, in places: the warmest water is at Campeche (30°C (86°F)), and 3 of the coastal destinations have a sea of 21 °C or more.
Warmest
39°
Mexicali
Coolest
23°
San Cristóbal de las Casas
Driest
5 mm
Tijuana
Warmest sea
30°
Campeche
Mexicali is the warm end of Mexico in September (39°C (102°F)); San Cristóbal de las Casas the cool end (23°C (73°F)). On average it is about as warm as August. Rain is frequent in most destinations. Best bets this month: Tijuana, Ensenada, and San Luis Potosí City.
Best places in Mexico in September
98 
Tijuana
Baja California · Mexico
28° / 17° 5 mm Sep
99
Ensenada
Baja California · Mexico
29° / 15° 5 mm Sep
87
San Luis Potosí City
San Luis Potosí City · Mexico
26° / 13° 60 mm Sep
98
Guerrero Negro
Baja California Sur · Mexico
30° / 19° 6 mm Sep
81
Guanajuato City
Guanajuato · Mexico
25° / 13° 122 mm Sep
82
San Miguel de Allende
Guanajuato · Mexico
25° / 12° 93 mm Sep
80
Querétaro City
Querétaro · Mexico
27° / 13° 93 mm Sep
82
Zacatecas City
Zacatecas · Mexico
23° / 10° 78 mm Sep
Weather in September by city
| Place | Day | Night | Rain | Sea | Score |
|---|---|---|---|---|---|
| Tijuana | 28° | 17° | 5 mm | — | 98 |
| San Luis Potosí City | 26° | 13° | 60 mm | — | 87 |
| Guanajuato City | 25° | 13° | 122 mm | — | 81 |
| Cabo San Lucas | 33° | 23° | 83 mm | 29° | 76 |
| Puebla City | 26° | 11° | 164 mm | — | 69 |
| Mexico City | 24° | 11° | 112 mm | — | 66 |
| Playa del Carmen | 32° | 23° | 205 mm | 29° | 63 |
| Cancún | 33° | 23° | 188 mm | — | 62 |
| San Cristóbal de las Casas | 23° | 11° | 208 mm | — | 62 |
| Campeche | 33° | 22° | 226 mm | 30° | 57 |
| Puerto Vallarta | 33° | 23° | 275 mm | — | 55 |
| Oaxaca City | 29° | 16° | 125 mm | — | 53 |
| Guadalajara | 30° | 16° | 162 mm | — | 51 |
| Monterrey | 33° | 20° | 167 mm | — | 47 |
| Mexicali | 39° | 23° | 8 mm | — | 40 |
| Mérida | 34° | 22° | 163 mm | — | 34 |
Festivals in Mexico in September
- Pantalla de Cristal Film Festival Film festival
Frequently asked questions
What is the weather like in Mexico in September?
Average daytime highs range from 23° in San Cristóbal de las Casas to 39° in Mexicali.
Can you swim in Mexico in September?
Yes — the sea is warmest around Campeche at about 30°.