Belize Weather in September

Belize in September sees very high temperatures, with highs around 32°C (90°F) and overnight lows of 26°C (79°F). With the rainy season in full effect, expect around 232 mm (9.1 in) of rainfall and regular showers throughout the month.

Rainfall in Belize in September

Belize is in the rainy season in September, with rain on around 18 days and an average of 232 mm (9.1 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.

Temperature in Belize in September

Daytime highs in Belize in September reach 32°C (90°F), with nights around 26°C (79°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. Nights are warm at 26°C (79°F). It's worth making sure your accommodation has decent ventilation or air conditioning.

Sunshine in Belize in September

With about 181 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.

Average water temperature in September

The water reaches 29°C (84°F) this month. It's on the warm side, which suits people who prefer that, but don't expect a cooling dip if the air temperature is also high.

September in Belize can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

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For a detailed overview over the year and the best time to visit Belize, check out our Belize's climate page.

Belize Temperature in September

Min Temperature 26°C (79°F)  

Max Temperature 32°C (90°F)  

Water Temperature 29°C (84°F)  

Chance of Rain 59%  

Precipitation 232 mm (9.1 in)  

Rainy days 18 days  

Humidity 84%  

Sunshine 181 hours  

Percentage Sunshine  

Daily Historical Temperatures

41-year average (1976-2025)

Based on our historical records, temperatures in Belize typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 25°C (77°F).

Average temperatures in September

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Daily Historical Precipitation

41-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Belize in September

Browse day-by-day weather records for Belize spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Belize historical weather extremes in September

Based on 21 years of weather observations (2004-2025), these are the most extreme conditions recorded in Belize.

• Belize recorded its highest September temperature of 38°C (100°F) on September 22, 2010.
• The lowest daytime temperature in September was 27°C (81°F), recorded on September 12, 2011.
• Nighttime temperatures dropped to 22°C (72°F) on September 30, 2022, marking the coldest September night on record.
• The wettest day in September Belize was on September 24, 2009 with 127 mm (5 in) of precipitation.

What to Wear in Belize in September

Warm but pleasant conditions in Belize in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Belize in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Belize, check out our Belize's climate page.

More climate data for Belize

Temperature Rainfall Sunshine Humidity Water Temp

See the full Belize climate overview or explore weather in Belize.