Cayo Guillermo Weather: September
 |
Average Day Temperature: | 90.0°F |
|
Average Night Temperature: | 84.5°F |
|
Sea Water Temperature: | 90.0°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 11.9 - 12.6 hours | |
|
Number of Rainy Days: | 5 days |
| Precipitation Totals: | 4.1 in | |
| detailed information | ||
forecast
| Cayo Guillermo |
Temperature
| Cayo Guillermo |
Air Temperature in September, °F
The highest day temperature in September 2025 was 91°F. The lowest night temperature was 82°F. The average values for day and night temperatures during September were 87.9°F и 86.2°F respectivly.
Cayo Guillermo Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Cayo Guillermo was 91.4°F. The maximum and minimum values were 90.6°F and 92.6°F respectively.
Most of the days in September are cloudy but you can also expect sunny or gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Cayo Guillermo is 4.1 in. It makes september one of the most rainy months of the year.
The average wind speed in September is 10.5 mph. It makes September the most windless month of the year for Cayo Guillermo.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Cayo Guillermo in September is 7.4 hours.
Cayo Guillermo on the Weather Map
| Cayo Coco |  |
+78 |
| Cayo Guillermo |  |
+82 |
| Cayo Largo |  |
+76 |
| Cayo Santa Maria | |
+80 |
| Havana | |
+76 |
| Holguin | |
+78 |
| Manzanillo | |
+80 |
| Niquero | |
+78 |
| Pinar del Rio | |
+72 |
| Playa Esmeralda |  |
+82 |
| Playa Santa Lucia | |
+80 |
| Santa Maria | |
+80 |
| Santiago de Cuba | |
+78 |
| Trinidad | |
+72 |
| Varadero | |
+74 |
| 0300 |  |
82°F | W 16 mph |
| 0600 | |
80°F | W 15 mph |
| 0900 |  |
80°F | W 16 mph |
| 1200 |  |
80°F | W 14 mph |
| 1500 | |
80°F | W 13 mph |
| 1800 | |
78°F | W 14 mph |
| 2100 | |
78°F | W 12 mph |
| 0000 | |
78°F | W 12 mph |