Belize City weather in September

In September, Belize City sees average daytime highs of 30°C and overnight lows near 26°C, with 218 mm of rain across 27 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 18% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Belize City's 11th-clearest and 12th-windiest month. For the whole year in context, see Belize City's year-round climate.

Daytime high
30°
1st warmest
Overnight low
26°
8th coldest
Rainfall
218 mm
27 wet days
Daylight
12 h 06 min
5:44 AM – 5:50 PM
Cloud cover
70%
11th clearest
Wind
11 km/h
12th windiest
Solar energy
5.25 kWh/m²
Travel score
2.9
out of 10

Belize City is most populous city in Belize and capital of the district of Belize.

Density
1,829/km²
people per km²
Founded
1638

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Belize City reaches about 30°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13126
23126
33126
43126
53126
63126
73126
83126
93126
103126
113126
123026
133026
143026
153026
163026
173026
183026
193026
203026
213026
223026
233026
243026
253026
263026
273026
283026
293026
303026

How September really feels in Belize City

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Belize City weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 22°8415.811.15.9
Feb27° / 23°4011.211.46.4
Mar28° / 24°389.511.96.4
Apr30° / 25°398.812.45.6
May30° / 26°10616.312.84.2
Jun30° / 26°20823.9133.2
Jul30° / 26°1722512.93.3
Aug30° / 26°18626.112.63.1
Sep30° / 26°2182712.12.9
Oct29° / 25°24524.511.63.5
Nov28° / 23°16419.111.24.9
Dec27° / 23°9217.5115.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24357
34258
44159
54159
64060
73961
83961
93961
103862
113862
123763
133664
143664
153565
163565
173565
183565
193466
203466
213466
223367
233367
243268
253367
263169
273169
283169
293169
303268

Chance of precipitation in September

Any precipitation

Belize City gets around 218 mm of rain over 27 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 89% and peaks near 91% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
186
287
387
487
588
688
788
888
989
1089
1189
1289
1389
1489
1589
1689
1789
1890
1990
2090
2190
2291
2391
2491
2591
2691
2791
2891
2990
3090

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the miserable band about 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
10100
20100
30100
40100
50100
60100
70100
80100
90100
100100
11199
12199
13199
14199
15298
16298
17298
18397
19397
20397
21496
22496
23595
24694
25694
26793
27892
28892
29991
30991

Wind in September

Winds average 11 km/h in September, the calmest month.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:42 AM to 5:46 AM, and sunset from 6:03 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:426:03
212.35:426:02
312.35:426:01
412.35:436:00
512.35:436:00
612.35:435:59
712.25:435:58
812.25:435:57
912.25:435:56
1012.25:435:55
1112.25:445:54
1212.25:445:54
1312.15:445:53
1412.15:445:52
1512.15:445:51
1612.15:445:50
1712.15:445:49
1812.15:445:48
1912.05:455:47
2012.05:455:47
2112.05:455:46
2212.05:455:45
2312.05:455:44
2412.05:455:43
2511.95:455:42
2611.95:465:41
2711.95:465:40
2811.95:465:40
2911.95:465:39
3011.95:465:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.25 kWh/m².

For context, solar energy here swings from a low near 3.85 kWh/m² to a high of 6.34 kWh/m² in April across the year — September's 5.25 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.6Bright
55.6Bright
65.6Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.4Bright
125.4Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.9Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Belize City

In seasonPeak

In September, Belize City sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

Belize City sits in the Atlantic hurricane belt; the season peaks August–October.

Belize City's rainy season runs June–November, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Belize City?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.9
Sightseeing
12th-best month of the year
4.1
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Belize City.

What to pack for Belize City in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Belize City sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Belize City in September

The nearest coast averages about 30°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in September at about 30°C and coldest in January near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr28Warm
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep30Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Belize City in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Belize City peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 10UV 13Dec 16UV 7
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec7Very high

Air quality in Belize City in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Belize City is worst in July — around 30 µg/m³ PM2.5 (moderate), about 5.4× the cleanest month (December, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1030 µg/m³Dec 176 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar10Good
Apr22Moderate
May28Moderate
Jun29Moderate
Jul30Moderate
Aug20Moderate
Sep14Moderate
Oct10Good
Nov6Good
Dec6Good
Location & terrain

Where is Belize City?

Belize City sits at 17.5°N, 88.2°W, 6 m above sea level, in Belize. The nearest listed city is Caye Caulker, 32 km away.

Caye CaulkerCrooked TreeSan PedroDangrigaBelmopanHopkinsOrange WalkSan Ignacio

Topography around Belize City

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Belize City.

Within 3 km, the terrain around Belize City has only modest variations in elevation — a maximum elevation change of 16 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 23 m; within 80 km, large variations in elevation — a maximum elevation change of 974 m.

The land around Belize City is covered by water (52%) and artificial surfaces (30%) within 3 km, water (72%) within 16 km, and water (52%) and trees (31%) within 80 km.

3 km
16 m
16 km
23 m
80 km
974 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Caye Caulker 32 km · Crooked Tree 48 km · San Pedro 52 km · Dangriga 59 km · Belmopan 66 km · Hopkins 71 km · Orange Walk 75 km · San Ignacio 100 km

Belize travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / G
110 / 220 V · 60 Hz
Prices
≈ 53% of US
price level, 2025
GDP per capita
$7,865
2025
Happiness
6.7 / 10
World Happiness, 2025
Homicide rate
28.1
per 100k, 2022
Road deaths
22.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Roman Catholic 40%Protestant 32%none 16%other 11%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Belize City (17.4995°, -88.1976°, elevation 6 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).