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Weather in Cancún for September 2026

Your guide to Cancún weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Cancún is slightly cooler than the historical average by 0.7 °C.

  • Expect cooler weather in the next days in Cancún with the forecast suggesting a temperature of 29.5 °C, lower than the historical average.

  • In general, the average temperature in Cancún at the beginning of September is 31.1 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 29 °C by the end of September.

    • Rain 🌧️

  • Cancún experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 277.7 mm.

Average dry days
1
Dry days
Average rainy days
29
Rainy days
Average snowy days
0
Snow days
Average temperatures
31°/26°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Cancún Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Partly cloudy
31°
2
Sunny
31°
3
Moderate rain at times
32°
4
Patchy rain possible
31°
5
Patchy rain possible
31°
6
Moderate or heavy rain shower
31°
7
Cloudy
31°
8
Light rain shower
31°
9
Moderate or heavy rain shower
31°
10
Moderate or heavy rain shower
30°
11
Patchy rain possible
32°
12
Cloudy
31°
13
Sunny
31°
14
Overcast
30°
15
Sunny
30°
16
Sunny
30°
17
Sunny
30°
18
Patchy rain possible
30°
19
Light rain shower
30°
20
Patchy rain possible
31°
21
Light rain shower
30°
22
Patchy rain possible
30°
23
Overcast
30°
24
Light rain shower
28°
25
Light rain shower
26°
26
Overcast
27°
27
Moderate rain at times
30°
28
Patchy rain possible
31°
29
Partly cloudy
31°
30
Moderate rain at times
30°

Temperatures trend during September in Cancún

See the weather trend as well as the moving average line

September weather in Cancún day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 31° /26° 4.3 mm 8
2 Sept. Sunny
Sunny
 31° /26° 2 mm 7
3 Sept. Moderate rain at times
Moderate rain at times
 32° /26° 3.7 mm 8
4 Sept. Patchy rain possible
Patchy rain possible
 31° /26° 4.8 mm 7
5 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 1.9 mm 8
6 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /26° 2.5 mm 7
7 Sept. Cloudy
Cloudy
 31° /26° 1.7 mm 7
8 Sept. Light rain shower
Light rain shower
 31° /26° 5.4 mm 6
9 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /26° 8.8 mm 7
10 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /26° 12.8 mm 8
11 Sept. Patchy rain possible
Patchy rain possible
 32° /26° 2.3 mm 7
12 Sept. Cloudy
Cloudy
 31° /26° 1.4 mm 7
13 Sept. Sunny
Sunny
 31° /28° 0.4 mm 10.3
14 Sept. Overcast
Overcast
 30° /28° 0 mm 10.8
15 Sept. Sunny
Sunny
 30° /28° 0.1 mm 10.7
16 Sept. Sunny
Sunny
 30° /28° 1.1 mm 10.8
17 Sept. Sunny
Sunny
 30° /27° 1.9 mm 8
18 Sept. Patchy rain possible
Patchy rain possible
 30° /27° 2.8 mm 6
19 Sept. Light rain shower
Light rain shower
 30° /26° 6.1 mm 8
20 Sept. Patchy rain possible
Patchy rain possible
 31° /27° 1.8 mm 7
21 Sept. Light rain shower
Light rain shower
 30° /27° 16.5 mm 7
22 Sept. Patchy rain possible
Patchy rain possible
 30° /28° 0.1 mm 7
23 Sept. Overcast
Overcast
 30° /28° 0 mm 6
24 Sept. Light rain shower
Light rain shower
 28° /24° 54 mm 6
25 Sept. Light rain shower
Light rain shower
 26° /25° 16.9 mm 6
26 Sept. Overcast
Overcast
 27° /26° 7.5 mm 6
27 Sept. Moderate rain at times
Moderate rain at times
 30° /25° 10.5 mm 7
28 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 1.7 mm 7
29 Sept. Partly cloudy
Partly cloudy
 31° /25° 2.5 mm 7
30 Sept. Moderate rain at times
Moderate rain at times
 30° /25° 8.5 mm 6
Next
Important Notice
Our weather forecast for Cancún in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cancún forecast closer to your planned date for the most up-to-date weather information.
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Cancún in September - FAQ

What are the expected maximum and minimum temperatures in Cancún during September?
During September, expect a variety of temperatures with highs around 31° and lows near 26°, suitable for diverse activities and preferences.

How much rainfall should be expected in Cancún during September?
Significant rainfall exceeding 277.7 mm is expected in Cancún during September, occurring over more than 29 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Cancún during September?
The average wind speed in Cancún during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

Cancún water temperatures in September

The average water temperature of the Caribbean Sea near Cancún in September is 27.4 °C. Temperatures remain fairly consistent throughout the month.

What is the water temperature in Cancún in September?
The average water temperature in Cancún in September is 27.4 °C.
Can you swim in Cancún in September?
Ideal conditions for families and casual swimmers. You can stay in for long swims or reef explorations with no thermal protection required.

September rainfall patterns in Cancún

Explore the daily rainfall trends and prepare for Cancúns September weather 💧
Typically, Cancún has 29 rainy days in September with a total of 277.7 mm of rainfall.

UV exposure in Cancún during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Cancún?

Get accurate weather forecasts for Cancún, located at latitude 21.174 and longitude -86.847. Stay updated with localized weather information tailored for Cancún.

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