SeasonMapMexico in September
September is Mexico's weakest month (rank 12 of 12): its 29 destinations average 73/100, led by San Miguel de Allende at 91 — 25°C and 9 rainy days — while Mérida is warmer at 39°C and scores 66.
#12 of 12 months for Mexico · 29 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Mexico in September
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | San Miguel de Allende | City | 25°C | 86 mm · 9 days | 91 tier S | — |
| 2 | Guanajuato | City | 25°C | 104 mm · 11 days | 90 tier S | — |
| 3 | Morelia | City | 23°C | 107 mm · 16 days | 89 tier A | — |
| 4 | Querétaro | City | 25°C | 116 mm · 10 days | 87 tier A | — |
| 5 | Cozumel | Island | 29°C | 104 mm · 18 days | 84 tier A | — |
| 6 | Los Cabos | Beach | 37°C | 92 mm · 9 days | 84 tier A | — |
| 7 | Holbox | Island | 31°C | 130 mm · 21 days | 83 tier A | — |
| 8 | Cancún | Beach | 36°C | 137 mm · 21 days | 82 tier A | — |
| 9 | Isla Mujeres | Island | 31°C | 137 mm · 21 days | 82 tier A | — |
| 10 | Mexico City | City | 22°C | 160 mm · 19 days | 82 tier A | — |
| 11 | Playa del Carmen | Beach | 30°C | 151 mm · 23 days | 81 tier A | — |
| 12 | Tulum | Beach | 36°C | 135 mm · 21 days | 81 tier A | — |
| 13 | Oaxaca | City | 27°C | 180 mm · 20 days | 79 tier B | — |
| 14 | Guadalajara | City | 29°C | 152 mm · 18 days | 78 tier B | — |
| 15 | Puebla | City | 22°C | 221 mm · 23 days | 78 tier B | — |
| 16 | Mazatlán | Beach | 31°C | 156 mm · 19 days | 77 tier B | — |
| 17 | Monterrey | City | 33°C | 84 mm · 6 days | 74 tier B | — |
| 18 | Mérida | City | 39°C | 92 mm · 17 days | 66 tier C | — |
| 19 | Sayulita | Beach | 30°C | 243 mm · 26 days | 66 tier C | — |
| 20 | Valladolid | City | 33°C | 100 mm · 18 days | 65 tier C | — |
| 21 | San Cristóbal de las Casas | City | 21°C | 428 mm · 26 days | 63 tier C | — |
| 22 | La Paz, Baja California | City | 34°C | 72 mm · 8 days | 62 tier C | — |
| 23 | Bacalar | City | 31°C | 167 mm · 25 days | 60 tier C | — |
| 24 | Zihuatanejo | Beach | 29°C | 333 mm · 23 days | 60 tier C | — |
| 25 | Huatulco | Beach | 27°C | 475 mm · 26 days | 58 tier D | — |
| 26 | Acapulco | Beach | 37°C | 370 mm · 25 days | 56 tier D | — |
| 27 | Puerto Escondido | Beach | 35°C | 461 mm · 25 days | 56 tier D | — |
| 28 | Puerto Vallarta | Beach | 39°C | 347 mm · 29 days | 55 tier D | — |
| 29 | Hermosillo | City | 37°C | 30 mm · 6 days | 54 tier D | — |
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means September is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Mexico in September
- Independence and Sanmiguelada · San Miguel de Allende · 15–18 Sep (usually)
- Alborada · San Miguel de Allende · 26 Sep – 1 Oct (usually)
- Independence days · Guanajuato · 13–17 Sep
- Sea turtle nesting · Cozumel and 3 more places · 15 May – 31 Oct
- Whale shark season · Holbox and 1 more place · 15 May – 17 Sep
- Whale sharks off Isla Mujeres · Cancún · 15 Jun – 15 Sep
- El Grito · Mexico City · 15–16 Sep
- Independence Day · Oaxaca · 15–16 Sep
Seasons in force
Peak crowds at 1 of Mexico's 18 well-known places this month.