The climate of Guayaquil (or Santiago de Guayaquil), the second largest city in Ecuador, is
, with a rainy period from January to April and a dry period from June to November, while May and December are transitional months.
The city is located in the west of Ecuador, at 2 degrees south latitude, where the Guayas River receives the waters of the Daule River before widening into a delta. Across the river lies the city of Durán. To the southwest we find a marshy area called Estero Salado.
From January to April, the weather is typically tropical, in fact, both temperature and humidity are high, the rains are frequent and the wind is weak. The sky is often cloudy. Sometimes the rains are particularly abundant and can cause floods, especially during El Niño years.
Starting in May, the Humboldt Current gradually lowers the temperature of the sea and air, and inhibits the formation of rains. A moderate wind blows from the ocean. The sky remains often cloudy, even though the sun can come out in the central hours of the day.
. Here are the average temperatures.
January is generally a warm to hot, muggy month. The average temperature is of
27.3 °C, with a minimum of
23.6 °C and a maximum of
31 °C.

On the coldest nights of the month, the temperature usually drops to around
21.5 °C.

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

Precipitation amounts to
230 mm, distributed over 18 days.
The day lasts on average 12 hours and 10 minutes.

There are on average 3.5 hours of sunshine per day. So, the sun shines 27% 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
24.4 °C. Therefore, the sea is warm enough for swimming.
February is generally a warm to hot, muggy month. The average temperature is of
27.2 °C, with a minimum of
23.8 °C and a maximum of
30.6 °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
33.5 °C.

Precipitation amounts to
240 mm, distributed over 20 days.
The day lasts on average 12 hours and 10 minutes.

There are on average 3.5 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of
6.8 kph.

The average sea temperature is of
25.5 °C. Therefore, the sea is warm enough for swimming.
March is generally a very hot, muggy month. The average temperature is of
27.6 °C, with a minimum of
24.2 °C and a maximum of
31.1 °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
33.5 °C.

Precipitation amounts to
250 mm, distributed over 20 days.
The day lasts on average 12 hours and 5 minutes.

There are on average 4.5 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
7.1 kph.

The average sea temperature is of
25.3 °C. Therefore, the sea is warm enough for swimming.
April, the hottest month of the year, is generally a very hot, muggy month. The average temperature is of
27.6 °C, with a minimum of
24 °C and a maximum of
31.3 °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
33.5 °C.

Precipitation amounts to
150 mm, distributed over 14 days.
The day lasts on average 12 hours and 5 minutes.

There are on average 5 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
7.7 kph.

The average sea temperature is of
24.5 °C. Therefore, the sea is warm enough for swimming.
May is generally a warm to hot, muggy month. The average temperature is of
27.1 °C, with a minimum of
23.4 °C and a maximum of
30.8 °C.

On the coldest nights of the month, the temperature usually drops to around
21 °C.

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

Precipitation amounts to
60 mm, distributed over 6 days.
The day lasts on average 12 hours and 0 minutes.

There are on average 4 hours of sunshine per day. So, the sun shines 32% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
8.5 kph.

The average sea temperature is of
24.2 °C. Therefore, the sea is warm enough for swimming.
June is generally a warm to hot, muggy month. The average temperature is of
25.7 °C, with a minimum of
22 °C and a maximum of
29.5 °C.

On the coldest nights of the month, the temperature usually drops to around
20 °C.

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

Precipitation amounts to
35 mm, distributed over 2 days.
The day lasts on average 12 hours and 0 minutes.

There are on average 3 hours of sunshine per day. So, the sun shines 23% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
10.6 kph.

The average sea temperature is of
23.3 °C. Therefore, the sea can be considered barely acceptable for swimming.
July is generally a warm to hot, muggy month. The average temperature is of
25 °C, with a minimum of
21.3 °C and a maximum of
28.8 °C.

On the coldest nights of the month, the temperature usually drops to around
19.5 °C.

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

Precipitation amounts to
10 mm, and all occurs in one day.
The day lasts on average 12 hours and 0 minutes.

There are on average 2.5 hours of sunshine per day. So, the sun shines 22% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
11.6 kph.

The average sea temperature is of
22.5 °C. Therefore, the sea can be considered barely acceptable for swimming.
August, the coolest month of the year, is generally a warm to hot, muggy month. The average temperature is of
24.9 °C, with a minimum of
20.7 °C and a maximum of
29 °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
31.5 °C.

Precipitation amounts to only
1 mm, distributed over 0 days.
The day lasts on average 12 hours and 0 minutes.

There are on average 3 hours of sunshine per day. So, the sun shines 23% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
12.8 kph.

The average sea temperature is of
21.9 °C. Therefore, the sea is cool for swimming.
September is generally a warm to hot month. The average temperature is of
25.4 °C, with a minimum of
21 °C and a maximum of
29.7 °C.

On the coldest nights of the month, the temperature usually drops to around
19.5 °C.

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

Precipitation amounts to only
2 mm, distributed over 0 days.
The day lasts on average 12 hours and 5 minutes.

There are on average 3 hours of sunshine per day. So, the sun shines 24% of the time.
The average humidity is 70%.
The average wind speed is of
13.2 kph.

The average sea temperature is of
21.7 °C. Therefore, the sea is cool for swimming.
October is generally a warm to hot month. The average temperature is of
25.6 °C, with a minimum of
21.4 °C and a maximum of
29.7 °C.

On the coldest nights of the month, the temperature usually drops to around
19.5 °C.

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

Precipitation amounts to only
3 mm, and all occurs in one day.
The day lasts on average 12 hours and 10 minutes.

There are on average 2.5 hours of sunshine per day. So, the sun shines 21% of the time.
The average humidity is 70%.
The average wind speed is of
13 kph.

The average sea temperature is of
22.3 °C. Therefore, the sea can be considered barely acceptable for swimming.
November is generally a warm to hot month. The average temperature is of
25.9 °C, with a minimum of
21.7 °C and a maximum of
30 °C.

On the coldest nights of the month, the temperature usually drops to around
20 °C.

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

Precipitation amounts to only
6 mm, and all occurs in one day.
The day lasts on average 12 hours and 10 minutes.

There are on average 3 hours of sunshine per day. So, the sun shines 25% of the time.
The average humidity is 68%.
The average wind speed is of
12.3 kph.

The average sea temperature is of
22.4 °C. Therefore, the sea can be considered barely acceptable for swimming.
December is generally a warm to hot month. The average temperature is of
27.1 °C, with a minimum of
22.9 °C and a maximum of
31.2 °C.

On the coldest nights of the month, the temperature usually drops to around
21 °C.

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

Precipitation amounts to
35 mm, distributed over 4 days.
The day lasts on average 12 hours and 20 minutes.

There are on average 3.5 hours of sunshine per day. So, the sun shines 29% of the time.
The average humidity is 66%.
The average wind speed is of
10.6 kph.

The average sea temperature is of
23.2 °C. Therefore, the sea can be considered barely acceptable for swimming.