September weather forecast
Belmopan, Belize

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The sunlit parliament building in Belmopan City, Belize
The sunlit parliament building in Belmopan City, Belize

Weather in September

September ushers in the last phase of significant monsoon conditions in Belmopan, Belize. The temperature structure experiences a minor decline from August, indicating the impending arrival of cooler days. An intriguing attribute of September is the highest number of cloud cover percentages, hitting 55%. The frequency of rainy days remains constant. However, the decrease in the average wind speed establishes a calmer ambiance around town.

Temperature

September's arrival registers an average high-temperature of a still tropical 31.4°C (88.5°F), closely aligning with the temperature of the previous month. Throughout September, Belmopan anticipates an average low-temperature of 22.2°C (72°F).

Heat index

The heat index value for September is appraised at an extremely hot 44°C (111.2°F). Forewarned: Heat cramps and heat exhaustion are anticipated. Ongoing physical activity increases the likelihood of heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Belmopan, the average relative humidity in September is 85%.

Rainfall

In Belmopan, in September, during 27.3 rainfall days, 106mm (4.17") of precipitation is typically accumulated. In Belmopan, Belize, during the entire year, the rain falls for 254.6 days and collects up to 808mm (31.81") of precipitation.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of the month, sunrise is at 05:41 and sunset at 18:08. On the last day of September, sunrise is at 05:45 and sunset at 17:44 CST.

Sunshine

In Belmopan, the average sunshine in September is 7.4h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum daily UV index of 6 during September morphs into the following directions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.

Frequently asked questions

How hot is it in Belmopan in September?

The average high-temperature, in September, in Belmopan, is 31.4°C (88.5°F), while the average low-temperature is 22.2°C (72°F). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is appraised at 44°C (111.2°F).

What is the average humidity in September in Belmopan?

In Belmopan, the average relative humidity in September is 85%.

How much does it rain in Belmopan in September?

In Belmopan, Belize, in September, during 27.3 rainfall days, 106mm (4.17") of precipitation is typically accumulated.

What is the average length of the day in September in Belmopan?

In September, the average day length in Belmopan is 12h and 14min.

When are sunrise and sunset in September in Belmopan?

On the first day of September, sunrise is at 05:41 and sunset at 18:08. On the last day of the month, sunrise is at 05:45 and sunset at 17:44 CST.

How long on average sun shines in September in Belmopan?

The average sunshine duration in September in Belmopan, Belize, is 7.4h.

How high is the UV index in September in Belmopan?

The average daily maximum UV index in September in Belmopan is 6. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Belmopan, Belize

Average temperature in September - Belmopan, Belize
  • Average high temperature in September: 31.4°C

The warmest month (with the highest average high temperature) is April (32.6°C).
The month with the lowest average high temperature is January (26.4°C).

  • Average low temperature in September: 22.2°C

The month with the highest average low temperature is June (22.8°C).
The coldest month (with the lowest average low temperature) is January (17.8°C).

Average pressure in September
Belmopan, Belize

Average pressure in September - Belmopan, Belize
  • Average pressure in September: 1011mbar

The month with the highest atmospheric pressure is January (1016.6mbar).
The month with the lowest atmospheric pressure is September (1011mbar).

Average wind speed in September
Belmopan, Belize

Average wind speed in September - Belmopan, Belize
  • Average wind speed in September: 4.9km/h

The windiest month (with the highest average wind speed) is April (6.5km/h).
The calmest month (with the lowest average wind speed) is November (4.6km/h).

Average humidity in September
Belmopan, Belize

Average humidity in September - Belmopan, Belize
  • Average humidity in September: 85%

The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is April (77%).

Average rainfall in September
Belmopan, Belize

Average rainfall in September - Belmopan, Belize
  • Average rainfall in September: 106mm

The wettest month (with the highest rainfall) is June (127mm).
The driest month (with the least rainfall) is March (26mm).

Average rainfall days in September
Belmopan, Belize

Average rainfall days in September - Belmopan, Belize
  • Average rainfall days in September: 27.3 days

The month with the highest number of rainy days is September (27.3 days).
The month with the least rainy days is April (15.5 days).

Average daylight in September /
Average sunshine in September
Belmopan, Belize

Average daylight in September / Average sunshine in September - Belmopan, Belize
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • Average sunshine in September: 7h and 2min

The month with the most sunshine is April (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

Average sunshine days in September
Belmopan, Belize

Average sunshine days in September - Belmopan, Belize
  • Average sunshine days in September: 1.3 days

The month with the most sunshine days is April (9.9 days).
The month with the least sunshine days is September (1.3 days).

Average UV index in September
Belmopan, Belize

Average UV index in September - Belmopan, Belize
  • Average UV index in September: 6

The months with the highest UV index are April, June and July (UV index 7).
The month with the lowest UV index is January (UV index 5).

Average cloud cover in September
Belmopan, Belize

Average cloud cover in September - Belmopan, Belize
  • Average cloud cover in September: 55

The month with the most cloud cover is November (Cloud cover 63).
The month with the least cloud cover is April (Cloud cover 45).

Average visibility in September
Belmopan, Belize

Average visibility in September - Belmopan, Belize
  • Average visibility in September: 6km

The months with the highest visibility are March, April, May and June (7km).
The months with the lowest visibility are January, February, July, August, September, October, November and December (6km).

Belmopan, Belize

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