Sinaloa weather in September
September is one of the least pleasant months in Sinaloa: highs of 31°C (88°F) and about 169 mm (6.7 in) of rain on average. Nights average 24°C (74°F) and cloud cover 57% (NASA POWER, 2001–2025 averages). It is the 3rd wettest month of the year and the 5th coolest. Compared with August, it is cooler and drier; October brings highs of 32°C (89°F) and 46 mm (1.8 in) of rain.
Figures are long-term averages for Culiacán, the largest city in Sinaloa. See below for other places.
Is September a good time to visit Sinaloa?
least pleasant month Weather score 60/100.
September is one of the least pleasant months for weather in Sinaloa. For better conditions, consider Oct–Apr.
Does it rain a lot in Sinaloa in September?
Yes, it is one of the rainy months: about 169 mm (6.7 in) falls in an average September. It is the 3rd wettest month of the year.
How warm is Sinaloa in September?
Days average 31°C (88°F) and nights 24°C (74°F).
Sinaloa weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 27°C (81°F) | 13°C (56°F) | 8 mm | 42% | best |
| February | 29°C (83°F) | 14°C (57°F) | 15 mm | 39% | best |
| March | 31°C (88°F) | 15°C (60°F) | 5 mm | 33% | best |
| April | 34°C (93°F) | 18°C (64°F) | 2 mm | 36% | best |
| May | 37°C (98°F) | 20°C (69°F) | 1 mm | 24% | fair |
| June | 37°C (99°F) | 24°C (74°F) | 33 mm | 35% | fair |
| July | 33°C (92°F) | 24°C (76°F) | 183 mm | 67% | least pleasant |
| August | 32°C (89°F) | 24°C (76°F) | 204 mm | 65% | least pleasant |
| September | 31°C (88°F) | 24°C (74°F) | 169 mm | 57% | least pleasant |
| October | 32°C (89°F) | 21°C (70°F) | 46 mm | 26% | best |
| November | 30°C (86°F) | 17°C (63°F) | 23 mm | 26% | best |
| December | 27°C (80°F) | 14°C (57°F) | 16 mm | 38% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Sinaloa in September
Weather can differ a lot within Sinaloa: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Culiacán | 31°C (88°F) | 24°C (74°F) | 169 mm | least pleasant |
| Mazatlán | 29°C (85°F) | 27°C (80°F) | 236 mm | least pleasant |
| Los Mochis | 33°C (91°F) | 24°C (76°F) | 128 mm | least pleasant |
| Guamúchil | 32°C (90°F) | 24°C (76°F) | 146 mm | least pleasant |
| Guasave | 32°C (89°F) | 26°C (80°F) | 140 mm | least pleasant |
| Escuinapa de Hidalgo | 28°C (82°F) | 22°C (71°F) | 241 mm | least pleasant |
| Navolato | 31°C (88°F) | 24°C (74°F) | 169 mm | least pleasant |
| Gabriel Leyva Solano | 32°C (89°F) | 26°C (80°F) | 140 mm | least pleasant |
| Costa Rica | 31°C (88°F) | 26°C (79°F) | 179 mm | least pleasant |
| Licenciado Benito Juárez | 31°C (88°F) | 26°C (79°F) | 179 mm | least pleasant |
| Juan José Ríos | 33°C (91°F) | 24°C (76°F) | 128 mm | least pleasant |
| El Rosario | 28°C (82°F) | 22°C (71°F) | 241 mm | least pleasant |