Belize weather in September

In September, Belize sees average daytime highs of 26°C and overnight lows near 20°C, with 20 mm of rain across 7.5 wet days and about 12 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 27°C by the end. The sky is clear or mostly clear about 0% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Belize's 12th-clearest and 1st-windiest month. For the whole year in context, see Belize's year-round climate.

Daytime high: 26°; 9th warmest
Overnight low: 20°; 4th coldest
Rainfall: 20 mm; 7.5 wet days
Daylight: 12 hours; 6:04 AM – 6:03 PM
Cloud cover: 89%; 12th clearest
Wind: 6 km/h; 1st windiest
Solar energy: 3.07 kWh/m²
Travel score: 6.3; out of 10

← August Belize year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 26°C in the first days to 27°C by the end.

A typical September day in Belize reaches about 26°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	27	27	27	27	27	27	27	27	27	27	27	27	27	28
Avg low (°C)	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	21	21	21	21	21	21

	Avg high (°C)	Avg low (°C)
1	26	19
2	26	19
3	26	19
4	26	19
5	26	19
6	26	19
7	26	19
8	26	19
9	26	20
10	26	20
11	26	20
12	26	20
13	26	20
14	26	20
15	26	20
16	26	20
17	27	20
18	27	20
19	27	20
20	27	20
21	27	20
22	27	20
23	27	20
24	27	20
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	28	21

How September really feels in Belize

Once humidity and wind are folded in, September averages 0 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Belize weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 22°	223	26.8	12.2	3.1
Feb	30° / 23°	179	22.6	12.2	3.2
Mar	30° / 23°	172	23.8	12	3.2
Apr	30° / 23°	187	24.1	11.9	3.2
May	29° / 22°	97	17.6	11.8	4.5
Jun	26° / 19°	9	2.4	11.7	7.3
Jul	25° / 18°	5	1.4	11.8	7.6
Aug	25° / 18°	9	3	11.8	7.2
Sep	26° / 20°	20	7.5	12	6.3
Oct	28° / 22°	105	21.7	12.1	4.0
Nov	29° / 22°	230	26.9	12.2	3.1
Dec	29° / 22°	264	28.3	12.3	3.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 1% of September, with mostly cloudy or overcast conditions the remaining 99%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2	2
Cloudier (%)	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	99	98	98	98	98	98	98	98	98	98	98	98

	Clearer (%)	Cloudier (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	1	99
7	1	99
8	1	99
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	2	98
26	2	98
27	2	98
28	2	98
29	2	98
30	2	98

Chance of precipitation in September

Any precipitation

Belize gets around 20 mm of rain over 7.5 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 26% and peaks near 42% on the wettest days. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	16	17	17	18	18	18	19	19	20	20	21	22	22	23	24	25	26	26	27	28	29	30	31	33	34	36	37	39	41	42

	Rain chance (%)
1	16
2	17
3	17
4	18
5	18
6	18
7	19
8	19
9	20
10	20
11	21
12	22
13	22
14	23
15	24
16	25
17	26
18	26
19	27
20	28
21	29
22	30
23	31
24	33
25	34
26	36
27	37
28	39
29	41
30	42

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 90% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Humid (%)	16	14	13	11	10	9	8	7	6	6	5	5	5	4	4	4	3	3	3	2	2	2	2	2	1	1	1	1	0	0
Muggy (%)	84	86	87	89	90	91	92	93	94	94	94	94	94	95	94	94	94	94	93	93	92	91	90	89	88	87	85	83	82	80
Oppressive (%)	0	0	0	0	0	0	0	0	0	0	1	1	1	1	2	2	3	3	4	5	6	7	8	9	11	12	14	16	18	20

	Humid (%)	Muggy (%)	Oppressive (%)
1	16	84	0
2	14	86	0
3	13	87	0
4	11	89	0
5	10	90	0
6	9	91	0
7	8	92	0
8	7	93	0
9	6	94	0
10	6	94	0
11	5	94	1
12	5	94	1
13	5	94	1
14	4	95	1
15	4	94	2
16	4	94	2
17	3	94	3
18	3	94	3
19	3	93	4
20	2	93	5
21	2	92	6
22	2	91	7
23	2	90	8
24	2	89	9
25	1	88	11
26	1	87	12
27	1	85	14
28	1	83	16
29	0	82	18
30	0	80	20

Wind in September

Winds average 6 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	7	7	7	7	7	7	7	7	7	7	7	7
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	6	calm
11	6	calm
12	6	calm
13	6	calm
14	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	7	calm
20	7	calm
21	7	calm
22	7	calm
23	7	calm
24	7	calm
25	7	calm
26	7	calm
27	7	calm
28	7	calm
29	7	calm
30	7	calm

Sunrise & sunset in September

DaylightNight

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

Days grow by about 6 minutes over September. Sunrise moves from 6:11 AM to 5:57 AM, and sunset from 6:06 PM to 5:59 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:11	6:11	6:10	6:10	6:09	6:09	6:08	6:08	6:08	6:07	6:07	6:06	6:06	6:05	6:05	6:04	6:04	6:03	6:03	6:02	6:02	6:01	6:01	6:00	6:00	5:59	5:59	5:58	5:58	5:57
Sunset (PM)	6:06	6:06	6:06	6:05	6:05	6:05	6:05	6:04	6:04	6:04	6:04	6:03	6:03	6:03	6:03	6:03	6:02	6:02	6:02	6:02	6:01	6:01	6:01	6:01	6:00	6:00	6:00	6:00	6:00	5:59

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	6:11	6:06
2	11.9	6:11	6:06
3	11.9	6:10	6:06
4	11.9	6:10	6:05
5	11.9	6:09	6:05
6	11.9	6:09	6:05
7	11.9	6:08	6:05
8	11.9	6:08	6:04
9	11.9	6:08	6:04
10	11.9	6:07	6:04
11	12.0	6:07	6:04
12	12.0	6:06	6:03
13	12.0	6:06	6:03
14	12.0	6:05	6:03
15	12.0	6:05	6:03
16	12.0	6:04	6:03
17	12.0	6:04	6:02
18	12.0	6:03	6:02
19	12.0	6:03	6:02
20	12.0	6:02	6:02
21	12.0	6:02	6:01
22	12.0	6:01	6:01
23	12.0	6:01	6:01
24	12.0	6:00	6:01
25	12.0	6:00	6:00
26	12.0	5:59	6:00
27	12.0	5:59	6:00
28	12.0	5:58	6:00
29	12.0	5:58	6:00
30	12.0	5:57	5:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.07 kWh/m².

For context, solar energy here swings from a low near 3.03 kWh/m² to a high of 4.72 kWh/m² in March across the year — September's 3.07 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.1	3.1	3.1	3.1	3.1	3.1	3.1	3.2	3.2	3.2	3.2	3.3	3.3	3.3	3.4
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	3.0	Moderate
2	3.0	Moderate
3	3.0	Moderate
4	3.0	Moderate
5	3.0	Moderate
6	3.0	Moderate
7	3.0	Moderate
8	3.0	Moderate
9	3.0	Moderate
10	3.0	Moderate
11	3.0	Moderate
12	3.0	Moderate
13	3.0	Moderate
14	3.0	Moderate
15	3.0	Moderate
16	3.1	Moderate
17	3.1	Moderate
18	3.1	Moderate
19	3.1	Moderate
20	3.1	Moderate
21	3.1	Moderate
22	3.1	Moderate
23	3.2	Moderate
24	3.2	Moderate
25	3.2	Moderate
26	3.2	Moderate
27	3.3	Moderate
28	3.3	Moderate
29	3.3	Moderate
30	3.4	Moderate

Planning a trip in September

Hazard calendar for Belize

In seasonPeak

None of Belize's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Belize?

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

6.3

Sightseeing

4th-best month of the year

6.2

Beach & pool

4th-best month of the year

September is a reasonable time to visit Belize for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Belize in September

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

In September, Belize sees daytime highs around 26°C and nights near 20°C. Worth packing: light clothes. About 8 days see rain.

light clothes

UV index in Belize in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (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 peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 7 (high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	13	15	13	9	7	7	7	10	13	10	10
Level	Extreme	Extreme	Extreme	Extreme	Very high	High	High	High	Very high	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	13	Extreme
Mar	15	Extreme
Apr	13	Extreme
May	9	Very high
Jun	7	High
Jul	7	High
Aug	7	High
Sep	10	Very high
Oct	13	Extreme
Nov	10	Extreme
Dec	10	Extreme

Air quality in Belize 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 is worst in July — around 48 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (October, 21 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	25	28	25	25	33	41	48	39	29	21	21	24
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Poor	Poor	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	25	Moderate
Feb	28	Moderate
Mar	25	Moderate
Apr	25	Moderate
May	33	Moderate
Jun	41	Poor
Jul	48	Poor
Aug	39	Poor
Sep	29	Moderate
Oct	21	Moderate
Nov	21	Moderate
Dec	24	Moderate

Location & terrain

Where is Belize?

Belize sits at 4.7°S, 12.8°E, 178 m above sea level, in Angola. The nearest listed city is Buco Zau, 27 km away.

Topography around Belize

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

Within 3 km, the terrain around Belize has only modest variations in elevation — a maximum elevation change of 143 m around an average of 194 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 695 m; within 80 km, large variations in elevation — a maximum elevation change of 878 m.

The land around Belize is covered by trees (96%) within 3 km, trees (100%) within 16 km, and trees (71%) and grassland (27%) within 80 km.

3 km

143 m

trees 96%

16 km

695 m

trees 100%

80 km

878 m

trees 71%

treesshrubsgrasslandartificial surfaces

← August Belize year-round climate October →Best places to visit in September

September weather nearby: Buco Zau 27 km · Tshela 44 km · Dolisie 51 km · Loudima 68 km · Kayes 76 km · Nkayi 77 km · Pointe-Noire 101 km · Loandjili 101 km

Angola travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F; 220 V · 50 Hz
Prices: ≈ 35% of US; price level, 2025
GDP per capita: $3,129; 2025
Happiness: 3.8 / 10; World Happiness, 2017
Homicide rate: 4.1; per 100k, 2016
Road deaths: 26.1; per 100k/yr, 2019
Income group: Lower middle; World Bank
English: Very low; EF EPI 413
Religion

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 (-4.65°, 12.7667°, elevation 178 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. 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).

	Avg high (°C)	Avg low (°C)
1	26	19
2	26	19
3	26	19
4	26	19
5	26	19
6	26	19
7	26	19
8	26	19
9	26	20
10	26	20
11	26	20
12	26	20
13	26	20
14	26	20
15	26	20
16	26	20
17	27	20
18	27	20
19	27	20
20	27	20
21	27	20
22	27	20
23	27	20
24	27	20
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	28	21

	Clearer (%)	Cloudier (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	1	99
7	1	99
8	1	99
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	2	98
26	2	98
27	2	98
28	2	98
29	2	98
30	2	98

	Rain chance (%)
1	16
2	17
3	17
4	18
5	18
6	18
7	19
8	19
9	20
10	20
11	21
12	22
13	22
14	23
15	24
16	25
17	26
18	26
19	27
20	28
21	29
22	30
23	31
24	33
25	34
26	36
27	37
28	39
29	41
30	42

	Humid (%)	Muggy (%)	Oppressive (%)
1	16	84	0
2	14	86	0
3	13	87	0
4	11	89	0
5	10	90	0
6	9	91	0
7	8	92	0
8	7	93	0
9	6	94	0
10	6	94	0
11	5	94	1
12	5	94	1
13	5	94	1
14	4	95	1
15	4	94	2
16	4	94	2
17	3	94	3
18	3	94	3
19	3	93	4
20	2	93	5
21	2	92	6
22	2	91	7
23	2	90	8
24	2	89	9
25	1	88	11
26	1	87	12
27	1	85	14
28	1	83	16
29	0	82	18
30	0	80	20

	Avg high (°C)	Avg low (°C)
1	26	19
2	26	19
3	26	19
4	26	19
5	26	19
6	26	19
7	26	19
8	26	19
9	26	20
10	26	20
11	26	20
12	26	20
13	26	20
14	26	20
15	26	20
16	26	20
17	27	20
18	27	20
19	27	20
20	27	20
21	27	20
22	27	20
23	27	20
24	27	20
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	28	21

	Clearer (%)	Cloudier (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	1	99
7	1	99
8	1	99
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	2	98
26	2	98
27	2	98
28	2	98
29	2	98
30	2	98

	Rain chance (%)
1	16
2	17
3	17
4	18
5	18
6	18
7	19
8	19
9	20
10	20
11	21
12	22
13	22
14	23
15	24
16	25
17	26
18	26
19	27
20	28
21	29
22	30
23	31
24	33
25	34
26	36
27	37
28	39
29	41
30	42

	Humid (%)	Muggy (%)	Oppressive (%)
1	16	84	0
2	14	86	0
3	13	87	0
4	11	89	0
5	10	90	0
6	9	91	0
7	8	92	0
8	7	93	0
9	6	94	0
10	6	94	0
11	5	94	1
12	5	94	1
13	5	94	1
14	4	95	1
15	4	94	2
16	4	94	2
17	3	94	3
18	3	94	3
19	3	93	4
20	2	93	5
21	2	92	6
22	2	91	7
23	2	90	8
24	2	89	9
25	1	88	11
26	1	87	12
27	1	85	14
28	1	83	16
29	0	82	18
30	0	80	20

	Avg high (°C)	Avg low (°C)
1	26	19
2	26	19
3	26	19
4	26	19
5	26	19
6	26	19
7	26	19
8	26	19
9	26	20
10	26	20
11	26	20
12	26	20
13	26	20
14	26	20
15	26	20
16	26	20
17	27	20
18	27	20
19	27	20
20	27	20
21	27	20
22	27	20
23	27	20
24	27	20
25	27	21
26	27	21
27	27	21
28	27	21
29	27	21
30	28	21

	Clearer (%)	Cloudier (%)
1	1	99
2	1	99
3	1	99
4	1	99
5	1	99
6	1	99
7	1	99
8	1	99
9	1	99
10	1	99
11	1	99
12	1	99
13	1	99
14	1	99
15	1	99
16	1	99
17	1	99
18	1	99
19	1	99
20	2	98
21	2	98
22	2	98
23	2	98
24	2	98
25	2	98
26	2	98
27	2	98
28	2	98
29	2	98
30	2	98

	Rain chance (%)
1	16
2	17
3	17
4	18
5	18
6	18
7	19
8	19
9	20
10	20
11	21
12	22
13	22
14	23
15	24
16	25
17	26
18	26
19	27
20	28
21	29
22	30
23	31
24	33
25	34
26	36
27	37
28	39
29	41
30	42

	Humid (%)	Muggy (%)	Oppressive (%)
1	16	84	0
2	14	86	0
3	13	87	0
4	11	89	0
5	10	90	0
6	9	91	0
7	8	92	0
8	7	93	0
9	6	94	0
10	6	94	0
11	5	94	1
12	5	94	1
13	5	94	1
14	4	95	1
15	4	94	2
16	4	94	2
17	3	94	3
18	3	94	3
19	3	93	4
20	2	93	5
21	2	92	6
22	2	91	7
23	2	90	8
24	2	89	9
25	1	88	11
26	1	87	12
27	1	85	14
28	1	83	16
29	0	82	18
30	0	80	20