Guanajuato weather in September
September is one of the least pleasant months in Guanajuato: highs of 25°C (78°F) and about 120 mm (4.7 in) of rain on average. Nights average 12°C (54°F) and cloud cover 61% (NASA POWER, 2001–2025 averages). It is the 3rd wettest month of the year and the 6th coolest. Compared with August, it is cooler and about as wet; October brings highs of 25°C (77°F) and 40 mm (1.6 in) of rain.
Figures are long-term averages for León de los Aldama, the largest city in Guanajuato. See below for other places.
Is September a good time to visit Guanajuato?
least pleasant month Weather score 68/100.
September is one of the least pleasant months for weather in Guanajuato. For better conditions, consider Oct–May.
Does it rain a lot in Guanajuato in September?
Some rain is normal: about 120 mm (4.7 in) falls in an average September. It is the 3rd wettest month of the year.
How warm is Guanajuato in September?
Days average 25°C (78°F) and nights 12°C (54°F).
Guanajuato weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 21°C (70°F) | 5°C (42°F) | 11 mm | 39% | best |
| February | 24°C (74°F) | 7°C (44°F) | 17 mm | 33% | best |
| March | 27°C (80°F) | 8°C (47°F) | 11 mm | 31% | best |
| April | 30°C (85°F) | 11°C (53°F) | 5 mm | 34% | best |
| May | 31°C (87°F) | 14°C (57°F) | 32 mm | 40% | best |
| June | 29°C (84°F) | 15°C (58°F) | 117 mm | 57% | fair |
| July | 26°C (80°F) | 14°C (56°F) | 174 mm | 63% | least pleasant |
| August | 26°C (80°F) | 13°C (55°F) | 138 mm | 57% | least pleasant |
| September | 25°C (78°F) | 12°C (54°F) | 120 mm | 61% | least pleasant |
| October | 25°C (77°F) | 10°C (51°F) | 40 mm | 42% | best |
| November | 23°C (73°F) | 7°C (45°F) | 13 mm | 33% | best |
| December | 21°C (70°F) | 6°C (43°F) | 6 mm | 37% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Guanajuato in September
Weather can differ a lot within Guanajuato: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| León de los Aldama | 25°C (78°F) | 12°C (54°F) | 120 mm | least pleasant |
| Irapuato | 25°C (76°F) | 13°C (55°F) | 128 mm | least pleasant |
| Celaya | 24°C (75°F) | 12°C (53°F) | 124 mm | least pleasant |
| San Miguel de Allende | 23°C (74°F) | 12°C (53°F) | 111 mm | least pleasant |
| Salamanca | 25°C (76°F) | 13°C (55°F) | 128 mm | least pleasant |
| Silao de la Victoria | 24°C (76°F) | 12°C (53°F) | 119 mm | least pleasant |
| Guanajuato | 24°C (76°F) | 12°C (53°F) | 119 mm | least pleasant |
| San Francisco del Rincón | 25°C (78°F) | 12°C (54°F) | 120 mm | least pleasant |
| Valle de Santiago | 25°C (76°F) | 13°C (55°F) | 128 mm | least pleasant |
| Dolores Hidalgo | 23°C (74°F) | 12°C (53°F) | 111 mm | least pleasant |
| Cortazar | 25°C (76°F) | 13°C (55°F) | 128 mm | least pleasant |
| Acámbaro | 23°C (73°F) | 11°C (52°F) | 139 mm | least pleasant |