Caye Caulker weather in May

In May, Caye Caulker sees average daytime highs of 28°C and overnight lows near 27°C, with 100 mm of rain across 13.2 wet days and about 12.8 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 48% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 36 min at the start of May to 13 hours by month's end. Set against the rest of the year, May is Caye Caulker's 6th-clearest and 5th-windiest month. For the whole year in context, see Caye Caulker's year-round climate.

Daytime high
28°
5th warmest
Overnight low
27°
9th coldest
Rainfall
100 mm
13.2 wet days
Daylight
12 h 48 min
5:23 AM – 6:13 PM
Cloud cover
47%
6th clearest
Wind
22 km/h
5th windiest
Solar energy
6.4 kWh/m²
Travel score
6.1
out of 10

Caye Caulker is island.

Density
693/km²
people per km²

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical May day in Caye Caulker reaches about 28°C in the afternoon and slips back to 27°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, May runs about 1°C warmer than April and on par with June.

24°26°28°30°32°151015202531
Avg high (°C)Avg low (°C)
12827
22827
32827
42827
52827
62827
72827
82827
92827
102827
112827
122827
132827
142827
152827
162827
172827
182827
192827
202827
212827
222827
232827
242827
252827
262827
272827
282827
292827
302827
312827

How May really feels in Caye Caulker

Once humidity and wind are folded in, May averages 11 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
11
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Caye Caulker weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 24°10216.211.16.2
Feb26° / 24°439.611.47.1
Mar26° / 25°387.911.97.6
Apr27° / 26°295.712.47.6
May28° / 27°10013.212.86.1
Jun28° / 27°19120.4134.4
Jul28° / 27°14220.7134.6
Aug29° / 27°18022.512.64.2
Sep29° / 27°20624.312.13.8
Oct28° / 26°30023.111.64.4
Nov27° / 25°20319.311.25.3
Dec26° / 24°11018115.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27525
37426
47426
57426
67327
77228
87129
97228
107129
117030
126931
136733
146634
156535
166436
176337
186238
196139
206040
215941
225842
235644
245545
255347
265248
275050
284852
294654
304456
314357

Chance of precipitation in May

Any precipitation

Caye Caulker gets around 100 mm of rain over 13.2 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 63% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
126
226
327
428
529
630
731
833
934
1035
1137
1238
1339
1440
1542
1643
1744
1845
1947
2048
2150
2251
2352
2454
2555
2657
2758
2859
2961
3062
3163

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1144650
2044551
3034552
4034453
5034453
6034453
7034453
8034453
9034453
10034552
11024553
12024553
13024454
14024454
15024454
16024355
17024256
18024256
19024157
20024058
21013861
22013762
23013564
24013465
25013267
26013168
27012970
28012772
29012673
30012574
31002377

Wind in May

Winds average 22 km/h in May.

Across May, daily wind ranges from about 22 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
123breezy
223breezy
323breezy
423breezy
523breezy
623breezy
723breezy
823breezy
923breezy
1023breezy
1123breezy
1222breezy
1322breezy
1422breezy
1522breezy
1622breezy
1722breezy
1822breezy
1922breezy
2022breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2622breezy
2722breezy
2822breezy
2922breezy
3022breezy
3122breezy

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 36 min at the start of May to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:30 AM to 5:20 AM, and sunset from 6:08 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:306:08
212.65:306:09
312.75:296:09
412.75:296:09
512.75:286:10
612.75:286:10
712.75:276:10
812.75:276:10
912.75:266:11
1012.85:266:11
1112.85:256:11
1212.85:256:12
1312.85:256:12
1412.85:246:13
1512.85:246:13
1612.85:236:13
1712.85:236:14
1812.95:236:14
1912.95:236:14
2012.95:226:15
2112.95:226:15
2212.95:226:15
2312.95:216:16
2412.95:216:16
2512.95:216:17
2612.95:216:17
2712.95:216:17
2813.05:216:18
2913.05:206:18
3013.05:206:18
3113.05:206:19

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.4 kWh/m².

For context, solar energy here swings from a low near 4.09 kWh/m² to a high of 6.63 kWh/m² in April across the year — May's 6.4 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.6Intense
56.6Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.2Intense
246.2Intense
256.2Intense
266.1Intense
276.1Intense
286.0Intense
296.0Intense
306.0Bright
316.0Bright
Planning a trip in May

Hazard calendar for Caye Caulker

In seasonPeak

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

Caye Caulker sits in the Atlantic hurricane belt; the season peaks August–October.

Caye Caulker'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 May a good time to visit Caye Caulker?

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

6.1
Sightseeing
5th-best month of the year
6.5
Beach & pool
4th-best month of the year

May is a reasonable time to visit Caye Caulker for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Caye Caulker in May

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

In May, Caye Caulker sees daytime highs around 28°C and nights near 27°C. Pack light clothes and sun protection. Worth having: rain gear and a windbreaker. About 13 days see rain.

light clothessun protectionrain geara windbreaker

Sea temperature near Caye Caulker in May

The nearest coast averages about 29°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 km away) is warmest in September at about 30°C and coldest in January near 26°C.

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

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar27Warm
Apr28Warm
May29Tropical
Jun29Tropical
Jul29Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov28Warm
Dec27Warm

UV index in Caye Caulker in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caye Caulker 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 Caye Caulker in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Caye Caulker is worst in July — around 31 µg/m³ PM2.5 (moderate), about 5.0× the cleanest month (December, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1131 µg/m³Dec 116 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar9Good
Apr14Moderate
May19Moderate
Jun30Moderate
Jul31Moderate
Aug22Moderate
Sep14Moderate
Oct9Good
Nov6Good
Dec6Good
Location & terrain

Where is Caye Caulker?

Caye Caulker sits at 17.7°N, 88.0°W, 0 m above sea level, in Belize. The nearest listed city is San Pedro, 21 km away.

San PedroBelize CityCrooked TreeOrange WalkDangrigaChetumalBelmopanHopkins

Topography around Caye Caulker

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

Within 3 km, the terrain around Caye Caulker has only modest variations in elevation — a maximum elevation change of 6 m around an average of 0 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 8 m; within 80 km, significant variations in elevation — a maximum elevation change of 394 m.

The land around Caye Caulker is covered by water (93%) within 3 km, water (97%) within 16 km, and water (63%) and trees (21%) within 80 km.

3 km
6 m
16 km
8 m
80 km
394 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
May weather nearby: San Pedro 21 km · Belize City 32 km · Crooked Tree 55 km · Orange Walk 68 km · Dangriga 88 km · Chetumal 92 km · Belmopan 95 km · Hopkins 101 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 Caye Caulker (17.7366°, -88.0276°, elevation 0 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).