Roatan weather in September

In September, Roatan sees average daytime highs of 29°C and overnight lows near 27°C, with 121 mm of rain across 17.8 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 28% 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 Roatan's 10th-clearest and 12th-windiest month. For the whole year in context, see Roatan's year-round climate.

Daytime high
29°
1st warmest
Overnight low
27°
12th coldest
Rainfall
121 mm
17.8 wet days
Daylight
12 h 06 min
5:38 AM – 5:43 PM
Cloud cover
61%
10th clearest
Wind
18 km/h
12th windiest
Solar energy
6.06 kWh/m²
Travel score
4.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Roatan reaches about 29°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 28°C and 29°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12927
22927
32927
42927
52927
62927
72927
82927
92927
102927
112927
122927
132927
142927
152927
162927
172927
182927
192927
202927
212927
222927
232827
242827
252827
262827
272827
282827
292827
302827

How September really feels in Roatan

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.

Roatan weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 24°16417.311.16.0
Feb26° / 25°6410.511.56.9
Mar26° / 25°549.511.97.4
Apr27° / 26°274.912.47.8
May28° / 27°447.612.86.8
Jun28° / 27°569.9135.8
Jul28° / 27°6113.612.95.8
Aug28° / 27°8215.412.55.2
Sep29° / 27°12117.812.14.6
Oct28° / 26°3092311.64.4
Nov27° / 25°31022.511.24.7
Dec26° / 25°17419.8115.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25149
35050
45050
55050
64951
74951
84852
94852
104753
114654
124654
134654
144456
154357
164357
174357
184357
194258
204258
214159
224159
234159
244060
253961
263961
273763
283763
293862
303763

Chance of precipitation in September

Any precipitation

Roatan gets around 121 mm of rain over 17.8 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 60% and peaks near 70% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
149
249
350
450
550
651
752
853
954
1055
1156
1257
1358
1459
1560
1661
1762
1863
1964
2065
2165
2266
2367
2468
2568
2669
2769
2870
2970
3070

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 79% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
11486
21486
31486
41486
51486
61486
71486
81585
91585
101684
111684
121783
131882
141882
151981
161981
172080
182179
192179
202278
212377
222476
232575
242674
252872
262971
273070
283268
293367
303466

Wind in September

Winds average 18 km/h in September, the calmest month.

Across September, daily wind ranges from about 17 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

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 5:36 AM to 5:39 AM, and sunset from 5:56 PM to 5:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:365:56
212.35:365:55
312.35:365:54
412.35:375:53
512.35:375:52
612.25:375:52
712.25:375:51
812.25:375:50
912.25:375:49
1012.25:375:48
1112.25:375:47
1212.25:375:47
1312.15:375:46
1412.15:385:45
1512.15:385:44
1612.15:385:43
1712.15:385:42
1812.15:385:42
1912.05:385:41
2012.05:385:40
2112.05:385:39
2212.05:385:38
2312.05:385:37
2412.05:395:36
2511.95:395:36
2611.95:395:35
2711.95:395:34
2811.95:395:33
2911.95:395:32
3011.95:395:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.06 kWh/m².

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 6.95 kWh/m² in April across the year — September's 6.06 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.2Intense
126.2Intense
136.2Intense
146.1Intense
156.1Intense
166.0Intense
176.0Intense
186.0Bright
195.9Bright
205.9Bright
215.8Bright
225.8Bright
235.8Bright
245.7Bright
255.7Bright
265.6Bright
275.6Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Roatan

In seasonPeak

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

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

Roatan's monsoon runs October–January, when most of the year's rain falls.

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

Is September a good time to visit Roatan?

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

4.6
Sightseeing
11th-best month of the year
5.6
Beach & pool
9th-best month of the year

September is a reasonable time to visit Roatan for sightseeing.

What to pack for Roatan in September

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

In September, Roatan sees daytime highs around 29°C and nights near 27°C. Pack light clothes, rain gear and sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Roatan 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 offshore is warmest in September at about 30°C and coldest in February 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
May28Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep30Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Roatan 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 Roatan peaks around March 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highMar 22UV 13Dec 16UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Roatan 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 Roatan is worst in July — around 33 µg/m³ PM2.5 (moderate), about 5.9× the cleanest month (December, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1232 µg/m³Dec 146 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar9Good
Apr18Moderate
May22Moderate
Jun30Moderate
Jul33Moderate
Aug22Moderate
Sep13Moderate
Oct10Good
Nov6Good
Dec6Good
Location & terrain

Where is Roatan?

Roatan sits at 16.3°N, 86.5°W, 0 m above sea level, in Honduras. The nearest listed city is La Ceiba, 67 km away.

La CeibaSonagueraTocoaOlanchitoSabáArizonaTelaYoro

Topography around Roatan

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

Within 3 km, the terrain around Roatan has only modest variations in elevation — a maximum elevation change of 224 m around an average of 36 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 224 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,182 m.

The land around Roatan is covered by trees (51%) and water (43%) within 3 km, water (91%) within 16 km, and water (85%) within 80 km.

3 km
224 m
16 km
224 m
80 km
2,182 m
treesgrasslandartificial surfaceswater
September weather nearby: La Ceiba 67 km · Sonaguera 79 km · Tocoa 91 km · Olanchito 93 km · Sabá 99 km · Arizona 112 km · Tela 116 km · Yoro 145 km

Honduras travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$3,598
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
66%
of population, 2024
Homicide rate
31.4
per 100k, 2023
Road deaths
16.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
High
EF EPI 553
Religion
Evangelical 55%Roman Catholic 33%none 10%

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 Roatan (16.3155°, -86.5397°, 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).