San Luis Potosí weather in September

In September, San Luis Potosí sees average daytime highs of 24°C and overnight lows near 14°C, with 82 mm of rain across 12.4 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 24% 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 Luis Potosí's 12th-clearest and 8th-windiest month. For the whole year in context, see San Luis Potosí's year-round climate.

Daytime high: 24°; 7th warmest
Overnight low: 14°; 9th coldest
Rainfall: 82 mm; 12.4 wet days
Daylight: 12 h 06 min; 6:34 AM – 6:42 PM
Cloud cover: 63%; 12th clearest
Wind: 10 km/h; 8th windiest
Solar energy: 5.28 kWh/m²
Travel score: 6.5; out of 10

San Luis Potosí is capital of the State of San Luis Potosí, Mexico.

Density: 501/km²; people per km²
Founded: 1592

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

← August San Luis Potosí 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 24°C through the month.

A typical September day in San Luis Potosí reaches about 24°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 27°C. Set against its neighbours, September runs about 1°C cooler than August and about 1°C warmer than 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)	25	25	25	25	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	23
Avg low (°C)	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	13

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

San Luis Potosí weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	20° / 6°	16	3	10.8	7.6
Feb	23° / 8°	14	2.5	11.2	8.3
Mar	25° / 10°	15	3.4	11.8	8.2
Apr	28° / 12°	22	4.5	12.5	7.3
May	28° / 14°	50	9.3	13	6.2
Jun	27° / 15°	73	11.3	13.3	6.4
Jul	25° / 15°	83	10.5	13.2	6.8
Aug	25° / 15°	62	9.8	12.8	6.9
Sep	24° / 14°	82	12.4	12.1	6.5
Oct	23° / 12°	42	7.1	11.5	7.5
Nov	22° / 9°	17	3.2	10.9	8.0
Dec	21° / 7°	10	1.9	10.7	7.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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 57%.

	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 (%)	49	47	46	45	44	43	42	42	42	42	41	41	42	41	41	42	41	41	41	42	42	43	43	44	44	45	46	46	47	47
Cloudier (%)	51	53	54	55	56	57	58	58	58	58	59	59	58	59	59	58	59	59	59	58	58	57	57	56	56	55	54	54	53	53

	Clearer (%)	Cloudier (%)
1	49	51
2	47	53
3	46	54
4	45	55
5	44	56
6	43	57
7	42	58
8	42	58
9	42	58
10	42	58
11	41	59
12	41	59
13	42	58
14	41	59
15	41	59
16	42	58
17	41	59
18	41	59
19	41	59
20	42	58
21	42	58
22	43	57
23	43	57
24	44	56
25	44	56
26	45	55
27	46	54
28	46	54
29	47	53
30	47	53

Chance of precipitation in September

Any precipitation

San Luis Potosí gets around 82 mm of rain over 12.4 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 41% and peaks near 45% 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 (%)	40	41	42	42	43	43	44	45	45	45	45	45	45	45	44	44	43	42	42	41	40	39	38	36	35	34	34	33	32	32

	Rain chance (%)
1	40
2	41
3	42
4	42
5	43
6	43
7	44
8	45
9	45
10	45
11	45
12	45
13	45
14	45
15	44
16	44
17	43
18	42
19	42
20	41
21	40
22	39
23	38
24	36
25	35
26	34
27	34
28	33
29	32
30	32

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 57% 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 (%)	33	33	32	32	31	31	30	30	30	30	30	30	30	31	31	31	32	33	34	35	37	38	40	42	44	46	48	49	51	52
Comfortable (%)	62	62	63	62	63	63	63	63	63	62	62	61	61	60	59	59	58	58	57	56	55	54	53	51	49	48	47	46	45	44
Humid (%)	5	5	5	6	6	6	7	7	7	8	8	9	9	9	10	10	10	9	9	9	8	8	7	7	6	6	5	5	4	4

	Dry (%)	Comfortable (%)	Humid (%)
1	33	62	5
2	33	62	5
3	32	63	5
4	32	62	6
5	31	63	6
6	31	63	6
7	30	63	7
8	30	63	7
9	30	63	7
10	30	62	8
11	30	62	8
12	30	61	9
13	30	61	9
14	31	60	9
15	31	59	10
16	31	59	10
17	32	58	10
18	33	58	9
19	34	57	9
20	35	56	9
21	37	55	8
22	38	54	8
23	40	53	7
24	42	51	7
25	44	49	6
26	46	48	6
27	48	47	5
28	49	46	5
29	51	45	4
30	52	44	4

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 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)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
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	10	calm
2	10	calm
3	10	calm
4	10	calm
5	10	calm
6	10	calm
7	10	calm
8	10	calm
9	10	calm
10	10	calm
11	10	calm
12	10	calm
13	10	calm
14	10	calm
15	10	calm
16	10	calm
17	10	calm
18	10	calm
19	10	calm
20	10	calm
21	10	calm
22	10	calm
23	10	calm
24	10	calm
25	10	calm
26	10	calm
27	10	calm
28	10	calm
29	10	calm
30	10	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 6:39 AM, and sunset from 6:57 PM to 6:28 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	12.4	12.3	12.3	12.3	12.3	12.3	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	11.8	11.8
Sunrise (AM)	6:30	6:30	6:31	6:31	6:31	6:32	6:32	6:32	6:32	6:33	6:33	6:33	6:34	6:34	6:34	6:34	6:35	6:35	6:35	6:36	6:36	6:36	6:36	6:37	6:37	6:37	6:38	6:38	6:38	6:39
Sunset (PM)	6:57	6:56	6:55	6:54	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

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.4	6:30	6:57
2	12.4	6:30	6:56
3	12.4	6:31	6:55
4	12.4	6:31	6:54
5	12.4	6:31	6:53
6	12.3	6:32	6:52
7	12.3	6:32	6:51
8	12.3	6:32	6:50
9	12.3	6:32	6:49
10	12.3	6:33	6:48
11	12.2	6:33	6:47
12	12.2	6:33	6:46
13	12.2	6:34	6:45
14	12.2	6:34	6:44
15	12.1	6:34	6:43
16	12.1	6:34	6:42
17	12.1	6:35	6:41
18	12.1	6:35	6:40
19	12.1	6:35	6:39
20	12.0	6:36	6:38
21	12.0	6:36	6:37
22	12.0	6:36	6:36
23	12.0	6:36	6:35
24	12.0	6:37	6:34
25	11.9	6:37	6:33
26	11.9	6:37	6:32
27	11.9	6:38	6:31
28	11.9	6:38	6:30
29	11.8	6:38	6:29
30	11.8	6:39	6:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.28 kWh/m².

For context, solar energy here swings from a low near 4.46 kWh/m² to a high of 7.32 kWh/m² in May across the year — September's 5.28 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	5.6	5.6	5.6	5.5	5.5	5.5	5.4	5.4	5.4	5.4	5.4	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.2
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	5.6	Bright
3	5.6	Bright
4	5.6	Bright
5	5.5	Bright
6	5.5	Bright
7	5.5	Bright
8	5.4	Bright
9	5.4	Bright
10	5.4	Bright
11	5.4	Bright
12	5.4	Bright
13	5.3	Bright
14	5.3	Bright
15	5.3	Bright
16	5.3	Bright
17	5.3	Bright
18	5.3	Bright
19	5.3	Bright
20	5.2	Bright
21	5.2	Bright
22	5.2	Bright
23	5.2	Bright
24	5.2	Bright
25	5.2	Bright
26	5.2	Bright
27	5.2	Bright
28	5.2	Bright
29	5.2	Bright
30	5.2	Bright

Planning a trip in September

Is September a good time to visit San Luis Potosí?

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

6.5

Sightseeing

10th-best month of the year

5.5

Beach & pool

9th-best month of the year

September is a reasonable time to visit San Luis Potosí for sightseeing.

What to pack for San Luis Potosí in September

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

In September, San Luis Potosí sees daytime highs around 24°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 Luis Potosí in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (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 Luis Potosí peaks around June 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 7 (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	12	13	14	14	12	14	12	10	8	7
Level	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	High

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

Location & terrain

Where is San Luis Potosí?

San Luis Potosí sits at 22.2°N, 101.0°W, 1,886 m above sea level, in Mexico. The nearest listed city is Soledad de Graciano Sánchez, 5.0 km away.

Topography around San Luis Potosí

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Luis Potosí.

Within 3 km, the terrain around San Luis Potosí has only modest variations in elevation — a maximum elevation change of 37 m around an average of 1,869 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 966 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,920 m.

The land around San Luis Potosí is covered by artificial surfaces (94%) within 3 km, shrubs (55%) and artificial surfaces (23%) within 16 km, and shrubs (69%) within 80 km.

3 km

37 m

artificial surfaces 94%

16 km

966 m

shrubs 55%

80 km

1,920 m

shrubs 69%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← August San Luis Potosí year-round climate October →Best places to visit in September

September weather nearby: Soledad de Graciano Sánchez 5.0 km · San Felipe 79 km · Salinas de Hidalgo 93 km · Ciudad Fernández 102 km · Rioverde 104 km · Loreto 105 km · San Luis de la Paz 106 km · Dolores Hidalgo 111 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 Luis Potosí (22.1523°, -100.9714°, elevation 1,886 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	25	15
2	25	15
3	25	15
4	25	15
5	24	15
6	24	15
7	24	15
8	24	15
9	24	15
10	24	15
11	24	15
12	24	15
13	24	15
14	24	14
15	24	14
16	24	14
17	24	14
18	24	14
19	24	14
20	24	14
21	24	14
22	24	14
23	24	14
24	24	14
25	24	14
26	24	14
27	24	14
28	24	13
29	24	13
30	23	13

	Clearer (%)	Cloudier (%)
1	49	51
2	47	53
3	46	54
4	45	55
5	44	56
6	43	57
7	42	58
8	42	58
9	42	58
10	42	58
11	41	59
12	41	59
13	42	58
14	41	59
15	41	59
16	42	58
17	41	59
18	41	59
19	41	59
20	42	58
21	42	58
22	43	57
23	43	57
24	44	56
25	44	56
26	45	55
27	46	54
28	46	54
29	47	53
30	47	53

	Rain chance (%)
1	40
2	41
3	42
4	42
5	43
6	43
7	44
8	45
9	45
10	45
11	45
12	45
13	45
14	45
15	44
16	44
17	43
18	42
19	42
20	41
21	40
22	39
23	38
24	36
25	35
26	34
27	34
28	33
29	32
30	32

	Dry (%)	Comfortable (%)	Humid (%)
1	33	62	5
2	33	62	5
3	32	63	5
4	32	62	6
5	31	63	6
6	31	63	6
7	30	63	7
8	30	63	7
9	30	63	7
10	30	62	8
11	30	62	8
12	30	61	9
13	30	61	9
14	31	60	9
15	31	59	10
16	31	59	10
17	32	58	10
18	33	58	9
19	34	57	9
20	35	56	9
21	37	55	8
22	38	54	8
23	40	53	7
24	42	51	7
25	44	49	6
26	46	48	6
27	48	47	5
28	49	46	5
29	51	45	4
30	52	44	4

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

	Clearer (%)	Cloudier (%)
1	49	51
2	47	53
3	46	54
4	45	55
5	44	56
6	43	57
7	42	58
8	42	58
9	42	58
10	42	58
11	41	59
12	41	59
13	42	58
14	41	59
15	41	59
16	42	58
17	41	59
18	41	59
19	41	59
20	42	58
21	42	58
22	43	57
23	43	57
24	44	56
25	44	56
26	45	55
27	46	54
28	46	54
29	47	53
30	47	53

	Rain chance (%)
1	40
2	41
3	42
4	42
5	43
6	43
7	44
8	45
9	45
10	45
11	45
12	45
13	45
14	45
15	44
16	44
17	43
18	42
19	42
20	41
21	40
22	39
23	38
24	36
25	35
26	34
27	34
28	33
29	32
30	32

	Dry (%)	Comfortable (%)	Humid (%)
1	33	62	5
2	33	62	5
3	32	63	5
4	32	62	6
5	31	63	6
6	31	63	6
7	30	63	7
8	30	63	7
9	30	63	7
10	30	62	8
11	30	62	8
12	30	61	9
13	30	61	9
14	31	60	9
15	31	59	10
16	31	59	10
17	32	58	10
18	33	58	9
19	34	57	9
20	35	56	9
21	37	55	8
22	38	54	8
23	40	53	7
24	42	51	7
25	44	49	6
26	46	48	6
27	48	47	5
28	49	46	5
29	51	45	4
30	52	44	4

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

	Clearer (%)	Cloudier (%)
1	49	51
2	47	53
3	46	54
4	45	55
5	44	56
6	43	57
7	42	58
8	42	58
9	42	58
10	42	58
11	41	59
12	41	59
13	42	58
14	41	59
15	41	59
16	42	58
17	41	59
18	41	59
19	41	59
20	42	58
21	42	58
22	43	57
23	43	57
24	44	56
25	44	56
26	45	55
27	46	54
28	46	54
29	47	53
30	47	53

	Rain chance (%)
1	40
2	41
3	42
4	42
5	43
6	43
7	44
8	45
9	45
10	45
11	45
12	45
13	45
14	45
15	44
16	44
17	43
18	42
19	42
20	41
21	40
22	39
23	38
24	36
25	35
26	34
27	34
28	33
29	32
30	32

	Dry (%)	Comfortable (%)	Humid (%)
1	33	62	5
2	33	62	5
3	32	63	5
4	32	62	6
5	31	63	6
6	31	63	6
7	30	63	7
8	30	63	7
9	30	63	7
10	30	62	8
11	30	62	8
12	30	61	9
13	30	61	9
14	31	60	9
15	31	59	10
16	31	59	10
17	32	58	10
18	33	58	9
19	34	57	9
20	35	56	9
21	37	55	8
22	38	54	8
23	40	53	7
24	42	51	7
25	44	49	6
26	46	48	6
27	48	47	5
28	49	46	5
29	51	45	4
30	52	44	4