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September Weather in Belmopan, Belize

Last updated: August 22, 2025

In September, the average temperature in Belmopan, Belize hovers around 28°C (82°F), making it a warm destination. Minimum temperatures can dip to 21°C (71°F), while maximum highs soar to 37°C (99°F). Expect 128 mm (5.0 in) of rainfall spread across about 24 days, contributing to an average humidity level of 82%. Get ready for a mix of warmth and moisture as you explore this vibrant locale!

September Temperature in Belmopan

In September in Belmopan, the average temperature is 28°C (82°F), with maximums reaching 37°C (99°F) and minimums dropping to as low as 21°C (71°F). This climate makes it an ideal destination for travelers seeking warm weather and plenty of sunshine.

September Weather in Belmopan: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Belmopan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belmopan, September typically has an average temperature of 28°C (82°F), with highs reaching up to 37°C (99°F) and lows dropping to around 21°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec747678818382828282807674
Data source: Temperature data for Belmopan generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Belmopan

In Belmopan in September, the total precipitation amount is 128 mm (5.0 in), which occurs over the course of 24 days.

September Precipitation Trends in Belmopan

The chart displays monthly precipitation patterns in Belmopan, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Belmopan, September typically receives around 128 mm (5.0 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec585041478717811813012819013964
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Belmopan

In Belmopan in September humidity is 82%. With an average temperature of 28°C (82°F), this humidity feels like walking through a warm, dense blanket, making outdoor activities a challenge and necessitating frequent breaks to stay hydrated.

September Average Humidity in Belmopan

This chart illustrates the average monthly humidity levels in Belmopan, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Belmopan is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%78%67%62%62%63%66%73%82%86%87%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Belmopan

In Belmopan in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Belmopan.

Maximum UV Index Levels in Belmopan for September

The chart shows the monthly maximum UV Index (UVI) for Belmopan in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Belmopan typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131413131314131298
Data source: Belmopan September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Belmopan Compares to Other Months

Weather in Belmopan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Belmopan, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Belmopan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)57 mm (2.3 inches)85%very high
February Weather25°C (77°F)50 mm (2.0 inches)78%extreme
March Weather25°C (78°F)41 mm (1.6 inches)67%extreme
April Weather27°C (82°F)47 mm (1.8 inches)62%extreme
May Weather28°C (83°F)87 mm (3.4 inches)62%extreme
June Weather28°C (82°F)178 mm (7.0 inches)63%extreme
July Weather28°C (82°F)118 mm (4.6 inches)66%extreme
August Weather28°C (82°F)130 mm (5.1 inches)73%extreme
September Weather28°C (82°F)128 mm (5.0 inches)82%extreme
October Weather27°C (80°F)190 mm (7.5 inches)86%extreme
November Weather25°C (76°F)139 mm (5.5 inches)87%very high
December Weather24°C (75°F)64 mm (2.5 inches)87%very high

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