Chaguanas weather in September

In September, Chaguanas sees average daytime highs of 29°C and overnight lows near 25°C, with 111 mm of rain across 21.7 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 6th-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 19% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Chaguanas's 7th-clearest and 11th-windiest month. For the whole year in context, see Chaguanas's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
25°
12th coldest
Rainfall
111 mm
21.7 wet days
Daylight
12 h 06 min
5:58 AM – 6:02 PM
Cloud cover
67%
7th clearest
Wind
12 km/h
11th windiest
Solar energy
5.82 kWh/m²
Travel score
3.7
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 Chaguanas reaches about 29°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12925
22925
32925
42925
52925
62925
72925
82925
92925
102925
112925
122925
132925
142925
152925
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282926
292926
302926

How September really feels in Chaguanas

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.

Chaguanas weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°369.511.56.3
Feb28° / 24°175.511.76.5
Mar29° / 24°225.211.96.1
Apr30° / 25°296.112.25.5
May30° / 25°5110.912.54.9
Jun29° / 25°1112012.64.1
Jul29° / 25°12625.412.63.7
Aug29° / 25°14426.312.33.5
Sep29° / 25°11121.712.13.7
Oct29° / 25°12122.411.83.8
Nov29° / 25°12923.411.53.9
Dec28° / 24°7816.611.45.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25248
35248
45149
55050
64951
74852
84753
94654
104456
114258
124258
134060
144060
153961
163862
173862
183763
193862
203763
213763
223862
233763
243763
253763
263664
273664
283565
293565
303466

Chance of precipitation in September

Any precipitation

Chaguanas gets around 111 mm of rain over 21.7 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 73% and peaks near 76% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
175
275
375
475
575
675
775
875
976
1076
1176
1276
1376
1476
1576
1676
1775
1874
1973
2072
2171
2271
2370
2469
2569
2669
2769
2869
2969
3069

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
15743
25743
35644
45545
55446
65446
75347
85248
95149
105149
115050
124951
134951
144951
154951
164852
174852
184852
194852
204951
214951
225050
235050
245149
255149
265248
275248
285248
295248
305248

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 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
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 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 18 minutes over September. Sunrise moves from 5:59 AM to 5:57 AM, and sunset from 6:12 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:596:12
212.25:596:11
312.25:596:10
412.25:596:10
512.25:596:09
612.25:596:08
712.15:596:08
812.15:596:07
912.15:596:06
1012.15:596:06
1112.15:596:05
1212.15:596:04
1312.15:586:04
1412.15:586:03
1512.15:586:02
1612.15:586:02
1712.05:586:01
1812.05:586:00
1912.05:586:00
2012.05:585:59
2112.05:585:58
2212.05:585:58
2312.05:585:57
2412.05:585:56
2512.05:585:56
2612.05:585:55
2711.95:585:54
2811.95:585:54
2911.95:575:53
3011.95:575:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.82 kWh/m².

For context, solar energy here swings from a low near 4.86 kWh/m² to a high of 6.42 kWh/m² in April across the year — September's 5.82 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Chaguanas

In seasonPeak

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

Chaguanas's rainy season runs June–December, 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 Chaguanas?

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

3.7
Sightseeing
10th-best month of the year
4.9
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Chaguanas.

What to pack for Chaguanas in September

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

In September, Chaguanas sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Chaguanas in September

The nearest coast averages about 29°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 26 km away) is warmest in September at about 29°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°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May28Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Chaguanas in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chaguanas peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 21UV 14Dec 12UV 9
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Chaguanas 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 Chaguanas is worst in June — around 31 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 14 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1530 µg/m³Nov 2314 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar19Moderate
Apr23Moderate
May26Moderate
Jun31Moderate
Jul24Moderate
Aug18Moderate
Sep15Moderate
Oct17Moderate
Nov14Moderate
Dec15Moderate
Location & terrain

Where is Chaguanas?

Chaguanas sits at 10.5°N, 61.4°W, 18 m above sea level, in Trinidad and Tobago. The nearest listed city is Tunapuna, 15 km away.

TunapunaParadiseLaventilleArimaPort of SpainMarabellaMon ReposSan Fernando

Topography around Chaguanas

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

Within 3 km, the terrain around Chaguanas has only modest variations in elevation — a maximum elevation change of 22 m around an average of 12 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 319 m; within 80 km, large variations in elevation — a maximum elevation change of 1,036 m.

The land around Chaguanas is covered by grassland (62%) and artificial surfaces (35%) within 3 km, grassland (32%), water (24%) and trees (23%) within 16 km, and water (73%) and trees (20%) within 80 km.

3 km
22 m
16 km
319 m
80 km
1,036 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Tunapuna 15 km · Paradise 16 km · Laventille 17 km · Arima 20 km · Port of Spain 20 km · Marabella 24 km · Mon Repos 27 km · San Fernando 27 km

Trinidad and Tobago travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
115 / 230 V · 60 Hz
Prices
≈ 51% of US
price level, 2025
GDP per capita
$18,967
2025
Happiness
5.9 / 10
World Happiness, 2025
Safe drinking water
69%
of population, 2024
Homicide rate
40.4
per 100k, 2022
Road deaths
9.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 32%Roman Catholic 22%Hindu 18%other 8%

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 Chaguanas (10.5167°, -61.4167°, elevation 18 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. 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).