San Luis Potosí weather in September
September is one of the least pleasant months in San Luis Potosí: highs of 23°C (73°F) and about 94 mm (3.7 in) of rain on average. Nights average 11°C (52°F) and cloud cover 58% (NASA POWER, 2001–2025 averages). It is the 2nd wettest month of the year and the 6th coolest. Compared with August, it is cooler and about as wet; October brings highs of 22°C (72°F) and 33 mm (1.3 in) of rain.
Figures are long-term averages for San Luis Potosí, the largest city in San Luis Potosí. See below for other places.
Is September a good time to visit San Luis Potosí?
least pleasant month Weather score 73/100.
September is one of the least pleasant months for weather in San Luis Potosí. For better conditions, consider Feb–May, Oct–Dec.
Does it rain a lot in San Luis Potosí in September?
Some rain is normal: about 94 mm (3.7 in) falls in an average September. It is the 2nd wettest month of the year.
How warm is San Luis Potosí in September?
Days average 23°C (73°F) and nights 11°C (52°F).
San Luis Potosí weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 19°C (65°F) | 3°C (38°F) | 11 mm | 51% | fair |
| February | 21°C (70°F) | 5°C (41°F) | 17 mm | 44% | best |
| March | 24°C (76°F) | 7°C (44°F) | 11 mm | 43% | best |
| April | 28°C (82°F) | 10°C (50°F) | 6 mm | 43% | best |
| May | 28°C (83°F) | 12°C (54°F) | 28 mm | 44% | best |
| June | 26°C (79°F) | 13°C (55°F) | 83 mm | 51% | least pleasant |
| July | 25°C (76°F) | 12°C (53°F) | 109 mm | 53% | least pleasant |
| August | 25°C (76°F) | 12°C (53°F) | 89 mm | 49% | least pleasant |
| September | 23°C (73°F) | 11°C (52°F) | 94 mm | 58% | least pleasant |
| October | 22°C (72°F) | 9°C (48°F) | 33 mm | 47% | best |
| November | 20°C (68°F) | 6°C (42°F) | 13 mm | 45% | best |
| December | 19°C (66°F) | 4°C (39°F) | 7 mm | 48% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across San Luis Potosí in September
Weather can differ a lot within San Luis Potosí: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| San Luis Potosí | 23°C (73°F) | 11°C (52°F) | 94 mm | least pleasant |
| Soledad de Graciano Sánchez | 23°C (73°F) | 11°C (52°F) | 94 mm | least pleasant |
| Ciudad Valles | 31°C (87°F) | 23°C (73°F) | 227 mm | least pleasant |
| Matehuala | 25°C (78°F) | 13°C (55°F) | 105 mm | least pleasant |
| Rioverde | 25°C (78°F) | 16°C (60°F) | 146 mm | least pleasant |
| Ciudad Fernández | 25°C (78°F) | 16°C (60°F) | 146 mm | least pleasant |
| Tamazunchale | 29°C (84°F) | 22°C (71°F) | 250 mm | least pleasant |
| Ébano | 30°C (86°F) | 23°C (74°F) | 251 mm | least pleasant |
| Salinas de Hidalgo | 24°C (75°F) | 11°C (53°F) | 89 mm | least pleasant |
| Tamuín | 31°C (87°F) | 23°C (73°F) | 227 mm | least pleasant |
| Cárdenas | 28°C (82°F) | 19°C (67°F) | 210 mm | least pleasant |