San Miguel de Allende weather in September

In September, San Miguel de Allende sees average daytime highs of 25°C and overnight lows near 14°C, with 100 mm of rain across 12.2 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is San Miguel de Allende's 12th-clearest and 5th-windiest month. For the whole year in context, see San Miguel de Allende's year-round climate.

Daytime high: 25°; 7th warmest
Overnight low: 14°; 9th coldest
Rainfall: 100 mm; 12.2 wet days
Daylight: 12 h 06 min; 6:34 AM – 6:41 PM
Cloud cover: 66%; 12th clearest
Wind: 9 km/h; 5th windiest
Solar energy: 5.41 kWh/m²
Travel score: 6.3; out of 10

San Miguel de Allende is municipal seat of Allende, State of Guanajuato, Mexico.

Air quality: Moderate; PM2.5 12 µg/m³ · 2018
Founded: 1542

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August San Miguel de Allende year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in San Miguel de Allende reaches about 25°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 28°C. Set against its neighbours, September runs about 1°C cooler than August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	26	26	26	26	26	26	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25
Avg low (°C)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	14	14	14	14	14	14	14	14	14	14	14	14	14	14	13	13

	Avg high (°C)	Avg low (°C)
1	26	15
2	26	15
3	26	15
4	26	15
5	26	15
6	26	15
7	25	15
8	25	15
9	25	15
10	25	15
11	25	15
12	25	15
13	25	15
14	25	15
15	25	14
16	25	14
17	25	14
18	25	14
19	25	14
20	25	14
21	25	14
22	25	14
23	25	14
24	25	14
25	25	14
26	25	14
27	25	14
28	25	14
29	25	13
30	25	13

San Miguel de Allende weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	22° / 7°	12	2.3	10.9	8.3
Feb	25° / 8°	13	2	11.3	8.6
Mar	27° / 10°	12	2.2	11.9	8.0
Apr	29° / 13°	15	3.7	12.5	6.3
May	30° / 14°	44	7.6	13	5.5
Jun	28° / 15°	103	12.1	13.2	5.6
Jul	26° / 15°	112	14.8	13.1	5.9
Aug	26° / 15°	101	12.6	12.7	6.2
Sep	25° / 14°	100	12.2	12.1	6.3
Oct	25° / 12°	37	6.4	11.5	7.5
Nov	24° / 10°	12	2.3	11	8.6
Dec	23° / 8°	4	1	10.8	8.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 60%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	40	40	39	40	39	39	39	39	39	39	39	38	38	38	39	40	40	40	40	39	39	40	40	42	42	43	43	44	45	45
Cloudier (%)	60	60	61	60	61	61	61	61	61	61	61	62	62	62	61	60	60	60	60	61	61	60	60	58	58	57	57	56	55	55

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	39	61
4	40	60
5	39	61
6	39	61
7	39	61
8	39	61
9	39	61
10	39	61
11	39	61
12	38	62
13	38	62
14	38	62
15	39	61
16	40	60
17	40	60
18	40	60
19	40	60
20	39	61
21	39	61
22	40	60
23	40	60
24	42	58
25	42	58
26	43	57
27	43	57
28	44	56
29	45	55
30	45	55

Chance of precipitation in September

Any precipitation

San Miguel de Allende gets around 100 mm of rain over 12.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 40% and peaks near 47% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	44	44	44	45	45	46	46	47	47	47	47	47	46	46	45	44	43	41	40	39	37	36	34	33	31	30	30	29	28	28

	Rain chance (%)
1	44
2	44
3	44
4	45
5	45
6	46
7	46
8	47
9	47
10	47
11	47
12	47
13	46
14	46
15	45
16	44
17	43
18	41
19	40
20	39
21	37
22	36
23	34
24	33
25	31
26	30
27	30
28	29
29	28
30	28

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 48% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	37	37	37	37	37	37	37	37	37	38	38	39	39	40	41	41	42	43	44	45	46	47	49	51	52	54	55	57	58	60
Comfortable (%)	55	55	55	54	54	54	53	53	53	52	52	51	51	50	49	49	49	48	48	47	47	46	45	43	42	41	40	39	38	37
Humid (%)	8	8	8	9	9	9	10	10	10	10	10	10	10	10	10	10	10	9	9	8	8	7	6	6	6	5	5	4	4	3

	Dry (%)	Comfortable (%)	Humid (%)
1	37	55	8
2	37	55	8
3	37	55	8
4	37	54	9
5	37	54	9
6	37	54	9
7	37	53	10
8	37	53	10
9	37	53	10
10	38	52	10
11	38	52	10
12	39	51	10
13	39	51	10
14	40	50	10
15	41	49	10
16	41	49	10
17	42	49	10
18	43	48	9
19	44	48	9
20	45	47	8
21	46	47	8
22	47	46	7
23	49	45	6
24	51	43	6
25	52	42	6
26	54	41	5
27	55	40	5
28	57	39	4
29	58	38	4
30	60	37	3

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	8	calm
2	8	calm
3	8	calm
4	8	calm
5	8	calm
6	8	calm
7	8	calm
8	8	calm
9	8	calm
10	8	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	9	calm
17	9	calm
18	9	calm
19	9	calm
20	9	calm
21	9	calm
22	9	calm
23	9	calm
24	9	calm
25	9	calm
26	9	calm
27	9	calm
28	9	calm
29	9	calm
30	9	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over September. Sunrise moves from 6:30 AM to 6:37 AM, and sunset from 6:55 PM to 6:27 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.4	12.4	12.4	12.4	12.3	12.3	12.3	12.3	12.3	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9	11.9	11.8
Sunrise (AM)	6:30	6:30	6:31	6:31	6:31	6:31	6:32	6:32	6:32	6:32	6:33	6:33	6:33	6:33	6:34	6:34	6:34	6:34	6:34	6:35	6:35	6:35	6:35	6:36	6:36	6:36	6:37	6:37	6:37	6:37
Sunset (PM)	6:55	6:54	6:53	6:53	6:52	6:51	6:50	6:49	6:48	6:47	6:46	6:45	6:44	6:43	6:42	6:41	6:40	6:39	6:38	6:37	6:36	6:35	6:34	6:33	6:32	6:31	6:30	6:29	6:28	6:27

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.4	6:30	6:55
2	12.4	6:30	6:54
3	12.4	6:31	6:53
4	12.4	6:31	6:53
5	12.3	6:31	6:52
6	12.3	6:31	6:51
7	12.3	6:32	6:50
8	12.3	6:32	6:49
9	12.3	6:32	6:48
10	12.2	6:32	6:47
11	12.2	6:33	6:46
12	12.2	6:33	6:45
13	12.2	6:33	6:44
14	12.2	6:33	6:43
15	12.1	6:34	6:42
16	12.1	6:34	6:41
17	12.1	6:34	6:40
18	12.1	6:34	6:39
19	12.1	6:34	6:38
20	12.0	6:35	6:37
21	12.0	6:35	6:36
22	12.0	6:35	6:35
23	12.0	6:35	6:34
24	12.0	6:36	6:33
25	11.9	6:36	6:32
26	11.9	6:36	6:31
27	11.9	6:37	6:30
28	11.9	6:37	6:29
29	11.9	6:37	6:28
30	11.8	6:37	6:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.41 kWh/m².

For context, solar energy here swings from a low near 4.75 kWh/m² to a high of 7.44 kWh/m² in April across the year — September's 5.41 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	5.7	5.7	5.7	5.7	5.6	5.6	5.6	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.4	5.4	5.4	5.4	5.4	5.4	5.4	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.3
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.7	Bright
2	5.7	Bright
3	5.7	Bright
4	5.7	Bright
5	5.6	Bright
6	5.6	Bright
7	5.6	Bright
8	5.5	Bright
9	5.5	Bright
10	5.5	Bright
11	5.5	Bright
12	5.5	Bright
13	5.5	Bright
14	5.5	Bright
15	5.4	Bright
16	5.4	Bright
17	5.4	Bright
18	5.4	Bright
19	5.4	Bright
20	5.4	Bright
21	5.4	Bright
22	5.3	Bright
23	5.3	Bright
24	5.3	Bright
25	5.3	Bright
26	5.3	Bright
27	5.3	Bright
28	5.3	Bright
29	5.3	Bright
30	5.3	Bright

Planning a trip in September

Hazard calendar for San Miguel de Allende

In seasonPeak

In September, San Miguel de Allende sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

San Miguel de Allende's rainy season runs June–September, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit San Miguel de Allende?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.3

Sightseeing

7th-best month of the year

5.8

Beach & pool

11th-best month of the year

September is a reasonable time to visit San Miguel de Allende for sightseeing.

What to pack for San Miguel de Allende in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, San Miguel de Allende sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in San Miguel de Allende in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Miguel de Allende peaks around June 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	8	10	13	13	13	14	12	13	11	11	8	7
Level	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	8	Very high
Feb	10	Extreme
Mar	13	Extreme
Apr	13	Extreme
May	13	Extreme
Jun	14	Extreme
Jul	12	Extreme
Aug	13	Extreme
Sep	11	Extreme
Oct	11	Extreme
Nov	8	Very high
Dec	7	Very high

Location & terrain

Where is San Miguel de Allende?

San Miguel de Allende sits at 20.9°N, 100.7°W, 1,917 m above sea level, in Mexico. The nearest listed city is Comonfort, 22 km away.

Topography around San Miguel de Allende

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Miguel de Allende.

Within 3 km, the terrain around San Miguel de Allende has significant variations in elevation — a maximum elevation change of 296 m around an average of 1,958 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 997 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,147 m.

The land around San Miguel de Allende is covered by artificial surfaces (42%) and shrubs (35%) within 3 km, shrubs (54%) and cropland (21%) within 16 km, and shrubs (47%) and cropland (28%) within 80 km.

3 km

296 m

artificial surfaces 42%

16 km

997 m

shrubs 54%

80 km

2,147 m

shrubs 47%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← August San Miguel de Allende year-round climate October →Best places to visit in September

September weather nearby: Comonfort 22 km · Dolores Hidalgo 33 km · Santa Rosa Jáuregui 36 km · San José Iturbide 38 km · Juventino Rosas 40 km · Apaseo el Grande 42 km · Celaya 44 km · San Luis de la Paz 49 km

Mexico travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B; 120 / 127 V · 60 Hz
Prices: ≈ 54% of US; price level, 2025
GDP per capita: $13,889; 2025
Happiness: 7.0 / 10; World Happiness, 2025
Safe drinking water: 43%; of population, 2024
Homicide rate: 24.9; per 100k, 2023
Road deaths: 12.8; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Very low; EF EPI 440
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Miguel de Allende (20.9153°, -100.7439°, elevation 1,917 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	26	15
2	26	15
3	26	15
4	26	15
5	26	15
6	26	15
7	25	15
8	25	15
9	25	15
10	25	15
11	25	15
12	25	15
13	25	15
14	25	15
15	25	14
16	25	14
17	25	14
18	25	14
19	25	14
20	25	14
21	25	14
22	25	14
23	25	14
24	25	14
25	25	14
26	25	14
27	25	14
28	25	14
29	25	13
30	25	13

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	39	61
4	40	60
5	39	61
6	39	61
7	39	61
8	39	61
9	39	61
10	39	61
11	39	61
12	38	62
13	38	62
14	38	62
15	39	61
16	40	60
17	40	60
18	40	60
19	40	60
20	39	61
21	39	61
22	40	60
23	40	60
24	42	58
25	42	58
26	43	57
27	43	57
28	44	56
29	45	55
30	45	55

	Rain chance (%)
1	44
2	44
3	44
4	45
5	45
6	46
7	46
8	47
9	47
10	47
11	47
12	47
13	46
14	46
15	45
16	44
17	43
18	41
19	40
20	39
21	37
22	36
23	34
24	33
25	31
26	30
27	30
28	29
29	28
30	28

	Dry (%)	Comfortable (%)	Humid (%)
1	37	55	8
2	37	55	8
3	37	55	8
4	37	54	9
5	37	54	9
6	37	54	9
7	37	53	10
8	37	53	10
9	37	53	10
10	38	52	10
11	38	52	10
12	39	51	10
13	39	51	10
14	40	50	10
15	41	49	10
16	41	49	10
17	42	49	10
18	43	48	9
19	44	48	9
20	45	47	8
21	46	47	8
22	47	46	7
23	49	45	6
24	51	43	6
25	52	42	6
26	54	41	5
27	55	40	5
28	57	39	4
29	58	38	4
30	60	37	3

	Avg high (°C)	Avg low (°C)
1	26	15
2	26	15
3	26	15
4	26	15
5	26	15
6	26	15
7	25	15
8	25	15
9	25	15
10	25	15
11	25	15
12	25	15
13	25	15
14	25	15
15	25	14
16	25	14
17	25	14
18	25	14
19	25	14
20	25	14
21	25	14
22	25	14
23	25	14
24	25	14
25	25	14
26	25	14
27	25	14
28	25	14
29	25	13
30	25	13

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	39	61
4	40	60
5	39	61
6	39	61
7	39	61
8	39	61
9	39	61
10	39	61
11	39	61
12	38	62
13	38	62
14	38	62
15	39	61
16	40	60
17	40	60
18	40	60
19	40	60
20	39	61
21	39	61
22	40	60
23	40	60
24	42	58
25	42	58
26	43	57
27	43	57
28	44	56
29	45	55
30	45	55

	Rain chance (%)
1	44
2	44
3	44
4	45
5	45
6	46
7	46
8	47
9	47
10	47
11	47
12	47
13	46
14	46
15	45
16	44
17	43
18	41
19	40
20	39
21	37
22	36
23	34
24	33
25	31
26	30
27	30
28	29
29	28
30	28

	Dry (%)	Comfortable (%)	Humid (%)
1	37	55	8
2	37	55	8
3	37	55	8
4	37	54	9
5	37	54	9
6	37	54	9
7	37	53	10
8	37	53	10
9	37	53	10
10	38	52	10
11	38	52	10
12	39	51	10
13	39	51	10
14	40	50	10
15	41	49	10
16	41	49	10
17	42	49	10
18	43	48	9
19	44	48	9
20	45	47	8
21	46	47	8
22	47	46	7
23	49	45	6
24	51	43	6
25	52	42	6
26	54	41	5
27	55	40	5
28	57	39	4
29	58	38	4
30	60	37	3

	Avg high (°C)	Avg low (°C)
1	26	15
2	26	15
3	26	15
4	26	15
5	26	15
6	26	15
7	25	15
8	25	15
9	25	15
10	25	15
11	25	15
12	25	15
13	25	15
14	25	15
15	25	14
16	25	14
17	25	14
18	25	14
19	25	14
20	25	14
21	25	14
22	25	14
23	25	14
24	25	14
25	25	14
26	25	14
27	25	14
28	25	14
29	25	13
30	25	13

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	39	61
4	40	60
5	39	61
6	39	61
7	39	61
8	39	61
9	39	61
10	39	61
11	39	61
12	38	62
13	38	62
14	38	62
15	39	61
16	40	60
17	40	60
18	40	60
19	40	60
20	39	61
21	39	61
22	40	60
23	40	60
24	42	58
25	42	58
26	43	57
27	43	57
28	44	56
29	45	55
30	45	55

	Rain chance (%)
1	44
2	44
3	44
4	45
5	45
6	46
7	46
8	47
9	47
10	47
11	47
12	47
13	46
14	46
15	45
16	44
17	43
18	41
19	40
20	39
21	37
22	36
23	34
24	33
25	31
26	30
27	30
28	29
29	28
30	28

	Dry (%)	Comfortable (%)	Humid (%)
1	37	55	8
2	37	55	8
3	37	55	8
4	37	54	9
5	37	54	9
6	37	54	9
7	37	53	10
8	37	53	10
9	37	53	10
10	38	52	10
11	38	52	10
12	39	51	10
13	39	51	10
14	40	50	10
15	41	49	10
16	41	49	10
17	42	49	10
18	43	48	9
19	44	48	9
20	45	47	8
21	46	47	8
22	47	46	7
23	49	45	6
24	51	43	6
25	52	42	6
26	54	41	5
27	55	40	5
28	57	39	4
29	58	38	4
30	60	37	3