, with a quite warm winter from December to February, and a hot summer from May to November, within which there is a rainy and muggy period from July to mid-October.
The city is located on the coast, in the state of Sinaloa, at the Tropic of Cancer, more or less at the latitude of Cabo San Lucas (i.e. the southernmost part of Baja California).
, every now and then, a mass of cold air from the United States can bring some cold at night. In February 2011, the minimum temperature dropped to 2 °C (35.5 °F).
On the hottest days, from June to October, the temperature can reach 35 °C (95 °F).
of the Pacific Ocean from June to November, however, they generally pass further west, along the California Peninsula; moreover, historically they never occurred in November. As a result, the city was hit very rarely: by Hurricane Mazatlán in October 1943, by Hurricane Olivia in October 1975, and by Hurricane 12 in October 1957.
The sea is pleasantly warm from June to November, while from January to March, it is a bit cool but all in all acceptable for swimming.
Mazatlán can be visited from December to March, as it is the mildest season. During the day you can enjoy the sun, while in the evening you will need a sweatshirt and a light jacket.
. Here are the average temperatures.
January, the coldest month of the year, is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
19.8 °C, with a minimum of
12.6 °C and a maximum of
27 °C.

On the coldest nights of the month, the temperature usually drops to around
8.5 °C.

On the warmest days of the month, the temperature usually reaches around
30.5 °C.

Precipitation amounts to
10 mm, distributed over 2 days.
The day lasts on average 10 hours and 55 minutes.

There are on average 7 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 68%.
The average wind speed is of
8.5 kph.

The average sea temperature is of
22.9 °C. Therefore, the sea can be considered barely acceptable for swimming.
February is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
19.9 °C, with a minimum of
12.8 °C and a maximum of
27 °C.

On the coldest nights of the month, the temperature usually drops to around
8.5 °C.

On the warmest days of the month, the temperature usually reaches around
30.5 °C.

Precipitation amounts to
10 mm, and all occurs in one day.
The day lasts on average 11 hours and 25 minutes.

There are on average 8 hours of sunshine per day. So, the sun shines 70% of the time.
The average humidity is 66%.
The average wind speed is of
9.1 kph.

The average sea temperature is of
22.5 °C. Therefore, the sea can be considered barely acceptable for swimming.
March is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
20.3 °C, with a minimum of
13 °C and a maximum of
27.6 °C.

On the coldest nights of the month, the temperature usually drops to around
9 °C.

On the warmest days of the month, the temperature usually reaches around
31.5 °C.

Precipitation amounts to only
5 mm, and all occurs in one day.
The day lasts on average 12 hours and 5 minutes.

There are on average 8.5 hours of sunshine per day. So, the sun shines 69% of the time.
The average humidity is 63%.
The average wind speed is of
9.9 kph.

The average sea temperature is of
22.6 °C. Therefore, the sea can be considered barely acceptable for swimming.
April is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
21.8 °C, with a minimum of
14.8 °C and a maximum of
28.9 °C.

On the coldest nights of the month, the temperature usually drops to around
11 °C.

On the warmest days of the month, the temperature usually reaches around
32.5 °C.

Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 12 hours and 40 minutes.

There are on average 8.5 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 62%.
The average wind speed is of
10.2 kph.

The average sea temperature is of
23.9 °C. Therefore, the sea is warm enough for swimming.
May is generally a warm to hot month. The average temperature is of
24.5 °C, with a minimum of
18.4 °C and a maximum of
30.6 °C.

On the coldest nights of the month, the temperature usually drops to around
13.5 °C.

On the warmest days of the month, the temperature usually reaches around
33.5 °C.

Precipitation amounts to
10 mm, distributed over 0 days.
The day lasts on average 13 hours and 20 minutes.

There are on average 9.5 hours of sunshine per day. So, the sun shines 72% of the time.
The average humidity is 64%.
The average wind speed is of
10.6 kph.

The average sea temperature is of
26.2 °C. Therefore, the sea is warm enough for swimming.
June is generally a very hot month. The average temperature is of
27.9 °C, with a minimum of
23.9 °C and a maximum of
32 °C.

On the coldest nights of the month, the temperature usually drops to around
20.5 °C.

On the warmest days of the month, the temperature usually reaches around
34.5 °C.

Precipitation amounts to
35 mm, distributed over 2 days.
The day lasts on average 13 hours and 30 minutes. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.

There are on average 9 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 65%.
The average wind speed is of
10.9 kph.

The average sea temperature is of
28.3 °C. Therefore, the sea is pleasantly warm and allows long swims.
July, the hottest month of the year, is generally a very hot, muggy month. The average temperature is of
28.5 °C, with a minimum of
24.6 °C and a maximum of
32.3 °C.

On the coldest nights of the month, the temperature usually drops to around
22 °C.

On the warmest days of the month, the temperature usually reaches around
34.5 °C.

Precipitation amounts to
195 mm, distributed over 10 days.
The day lasts on average 13 hours and 25 minutes.

There are on average 7 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
9.9 kph.

The average sea temperature is of
29.6 °C. Therefore, the sea is pleasantly warm and allows long swims.
August is generally a very hot, muggy month. The average temperature is of
28.3 °C, with a minimum of
24.6 °C and a maximum of
32 °C.

On the coldest nights of the month, the temperature usually drops to around
22 °C.

On the warmest days of the month, the temperature usually reaches around
34 °C.

Precipitation amounts to
255 mm, distributed over 11 days.
The day lasts on average 12 hours and 55 minutes.

There are on average 7.5 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
8.7 kph.

The average sea temperature is of
30.1 °C. Therefore, the sea is pleasantly warm and allows long swims.
September is generally a very hot, muggy month. The average temperature is of
27.9 °C, with a minimum of
24.4 °C and a maximum of
31.4 °C.

On the coldest nights of the month, the temperature usually drops to around
22 °C.

On the warmest days of the month, the temperature usually reaches around
34 °C.

Precipitation amounts to
200 mm, distributed over 11 days.
The day lasts on average 12 hours and 10 minutes.

There are on average 7 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
7.9 kph.

The average sea temperature is of
29.9 °C. Therefore, the sea is pleasantly warm and allows long swims.
October is generally a warm to hot, muggy month. The average temperature is of
27 °C, with a minimum of
22.5 °C and a maximum of
31.6 °C.

On the coldest nights of the month, the temperature usually drops to around
18.5 °C.

On the warmest days of the month, the temperature usually reaches around
34 °C.

Precipitation amounts to
80 mm, distributed over 4 days.
The day lasts on average 11 hours and 35 minutes.

There are on average 8 hours of sunshine per day. So, the sun shines 69% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
7.7 kph.

The average sea temperature is of
29.5 °C. Therefore, the sea is pleasantly warm and allows long swims.
November is generally a warm to hot, muggy month. The average temperature is of
24 °C, with a minimum of
18 °C and a maximum of
30 °C.

On the coldest nights of the month, the temperature usually drops to around
13.5 °C.

On the warmest days of the month, the temperature usually reaches around
33 °C.

Precipitation amounts to
25 mm, distributed over 2 days.
The day lasts on average 11 hours and 0 minutes.

There are on average 8 hours of sunshine per day. So, the sun shines 73% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
8.1 kph.

The average sea temperature is of
27.3 °C. Therefore, the sea is pleasantly warm and allows long swims.
December is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of
20.8 °C, with a minimum of
14.1 °C and a maximum of
27.4 °C.

On the coldest nights of the month, the temperature usually drops to around
9 °C.

On the warmest days of the month, the temperature usually reaches around
31.5 °C.

Precipitation amounts to
20 mm, distributed over 2 days.
The day lasts on average 10 hours and 40 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.

There are on average 6.5 hours of sunshine per day. So, the sun shines 62% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
7.9 kph.

The average sea temperature is of
24.6 °C. Therefore, the sea is warm enough for swimming.