Mexico in September

September is Mexico's weakest month (rank 12 of 12): its 29 destinations average 70/100, led by San Miguel de Allende at 89 — 25°C and 13 rainy days — while La Paz, Baja California is warmer at 42°C and scores 47.

#12 of 12 months for Mexico · 29 destinations · updated September 2026 · climate normals from ERA5 reanalysis

🇲🇽 Mexico, month by month

70/100 in September

Where in Mexico in September

#	Place	Type	Feels-like high	Rain	Comfort	At its best
1	San Miguel de Allende	City	25°C	98 mm · 13 days	89 tier A	—
2	Guanajuato	City	26°C	130 mm · 15 days	87 tier A	—
3	Morelia	City	29°C	126 mm · 19 days	84 tier A	—
4	Querétaro	City	28°C	131 mm · 14 days	84 tier A	—
5	Los Cabos	Beach	39°C	120 mm · 11 days	82 tier A	—
6	Mexico City	City	26°C	178 mm · 21 days	81 tier A	—
7	Holbox	Island	37°C	157 mm · 23 days	80 tier A	—
8	Tulum	Beach	36°C	142 mm · 22 days	80 tier A	—
9	Cozumel	Island	38°C	132 mm · 20 days	79 tier B	—
10	Cancún	Beach	37°C	175 mm · 23 days	78 tier B	—
11	Isla Mujeres	Island	38°C	175 mm · 23 days	78 tier B	—
12	Playa del Carmen	Beach	39°C	167 mm · 24 days	78 tier B	—
13	Puebla	City	25°C	247 mm · 25 days	77 tier B	—
14	Mazatlán	Beach	41°C	170 mm · 19 days	74 tier B	—
15	Guadalajara	City	32°C	173 mm · 19 days	73 tier B	—
16	Monterrey	City	34°C	81 mm · 9 days	73 tier B	—
17	Oaxaca	City	31°C	202 mm · 19 days	73 tier B	—
18	San Cristóbal de las Casas	City	27°C	440 mm · 27 days	65 tier C	—
19	Sayulita	Beach	37°C	246 mm · 26 days	64 tier C	—
20	Mérida	City	41°C	118 mm · 19 days	61 tier C	—
21	Zihuatanejo	Beach	38°C	310 mm · 23 days	60 tier C	—
22	Bacalar	City	40°C	160 mm · 25 days	57 tier D	—
23	Huatulco	Beach	37°C	477 mm · 26 days	57 tier D	—
24	Acapulco	Beach	41°C	426 mm · 25 days	55 tier D	—
25	Puerto Escondido	Beach	37°C	501 mm · 24 days	55 tier D	—
26	Valladolid	City	41°C	113 mm · 20 days	55 tier D	—
27	Puerto Vallarta	Beach	41°C	348 mm · 29 days	54 tier D	—
28	La Paz, Baja California	City	42°C	92 mm · 9 days	47 tier F	—
29	Hermosillo	City	41°C	46 mm · 6 days	44 tier F	—

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
El Grito · Mexico City · 15–16 Sep
Whale shark season · Holbox and 1 more place · 15 May – 17 Sep
Sea turtle nesting · Tulum and 3 more places · 1 May – 31 Oct
Whale sharks off Isla Mujeres · Cancún · 15 Jun – 15 Sep
Independence Day · Oaxaca · 15–16 Sep

Seasons in force

Hurricane season · 18 places Monsoon · 17 places Sargassum season · 5 places Extreme heat · 2 places Flood season · 1 place Harvest · 1 place Surf season · 1 place Volcanic activity · 1 place

Peak crowds at 2 of Mexico's 18 well-known places this month.

Better months for Mexico

February · 91/100 January · 89/100 March · 89/100

← Mexico in August Mexico in October →Best time to visit Mexico, month by month Compare: San Miguel de Allende vs Guanajuato in September