Culiacán, where it's located

The climate of Culiacán is sub-tropical, with a fairly warm winter from December to February and a long, hot and muggy summer from April to October, within which there is a rainy period from July to September.
The city is located in western Mexico, in the state of Sinaloa, at the 24th parallel (therefore a bit to the north of the Tropic of Cancer), and 50 km (30 mi) away from the sea (the southern part of the Gulf of California).
From June to November, but with a higher probability from August to October, Culiacán can be affected by hurricanes of the Pacific Ocean. Typically, cyclones arrive weakened, but sometimes they can bring heavy rains, as happened with Hurricane Waldo in October 1985, and with Hurricane Manuel in September 2013. However, hurricanes are rare in June, the month in which they are most frequent is September, and historically they have never occurred in November.
The average temperature of the coldest month (January) is of 20.2 °C (68 °F), that of the warmest month (July) is of 30.3 °C (87 °F). In winter, especially in January, at night the temperature can drop to around 5 °C (41 °F). From May to October, it can instead reach, and sometimes exceed, 40 °C (104 °F). Here are the average temperatures.
Culiacán - Average temperatures
Min (°C)121213151924252424211613
Max (°C)283031343636363535353229
Min (°F)545455596675777575706155
Max (°F)828688939797979595959084

Precipitation amounts to 665 millimeters (26.2 inches) per year: so, it is at an intermediate level, but it is concentrated in a few months. It ranges from 0 mm (0 in) in the driest months (April, May) to 210 mm (8.3 in) in the wettest (August). Here is the average precipitation.
Culiacán - Average precipitation

On average, there are around 2,495 sunshine hours per year. The relatively less sunny period is the rainy one, from July to September. Here are the average sunshine hours per day.
Culiacán - Sunshine

The sea temperature ranges between 21 °C (70 °F) and 30 °C (86 °F). From January to March the sea is a bit cool, while in summer it gets very warm. Here are the average sea temperatures.
Culiacán - Sea temperature
Temp (°C)222122232628303030292724
Temp (°F)727072737982868686848175


Best Time

The best time to visit Culiacán is from December to February, since it is a dry and not too hot period.