September weather forecast
Belize City, Belize

September brings an escalation in rainfall, with Belize City recording 287mm (11.3"), the second-highest after June. Consequently, this month witnesses fewer sunny days, but the city remains buzzing with indoor activities and attractions. The UV index drops to 12, slightly lower than in the summer months, but still requiring necessary protective measures. Despite the irregular sunshine, life in Belize City runs at its usual pace, performing its daily hustle under gray skies. Tourists are often attracted to the city's cultural events and festivals during this period.

Temperature

The advent of September denotes an average high-temperature of a still tropical 31°C (87.8°F), subtly different from August's 31.3°C (88.3°F). An average low-temperature of 23.9°C (75°F) is common in Belize City during the nights of September.

Heat index

September's mean heat index is evaluated at a blistering 42°C (107.6°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The months with the highest humidity are August, September, November and December, with an average relative humidity of 84%.

Rainfall

The month with the most rainfall is September, when the rain falls for 15.9 days and typically aggregates up to 287mm (11.3") of precipitation.

Sea temperature

May through November, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
Note: Between the temperatures of 25°C (77°F) and 29°C (84.2°F), water is considered very warm, providing pleasure in water activities without discomfort over lengthy periods.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of September, sunrise is at 05:38 and sunset at 18:06. On the last day of the month, sunrise is at 05:42 and sunset at 17:42 CST.

Sunshine

With an average of 5.9h of sunshine, September has the least sunshine of the year in Belize City.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 12 in September interprets into the following recommendations:
Enforce all necessary precautions, unprotected skin might burn swiftly. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Despite the clouds, sunscreen with an SPF of at least 30 should be used liberally and reapplied frequently, especially after a swim or outdoor workout. Be on guard! The reflective nature of sand and water boosts UV exposure.