Trinidad weather in September

In September, Trinidad sees average daytime highs of 32°C and overnight lows near 22°C, with 106 mm of rain across 10.2 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Trinidad's 4th-clearest and 1st-windiest month. For the whole year in context, see Trinidad's year-round climate.

Daytime high
32°
1st warmest
Overnight low
22°
5th coldest
Rainfall
106 mm
10.2 wet days
Daylight
11 h 54 min
6:16 AM – 6:11 PM
Cloud cover
51%
4th clearest
Wind
9 km/h
1st windiest
Solar energy
5.56 kWh/m²
Travel score
4.0
out of 10

Trinidad is city in Bolivia.

Density
3,121/km²
people per km²
Founded
1686

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 32°C through the month.

A typical September day in Trinidad reaches about 32°C in the afternoon and slips back to 22°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 36°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13221
23221
33221
43221
53221
63221
73221
83221
93221
103221
113221
123221
133221
143222
153222
163222
173222
183222
193222
203222
213222
223222
233222
243222
253222
263222
273222
283222
293222
303222

How September really feels in Trinidad

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.

Trinidad weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°33026.912.82.9
Feb30° / 24°28423.412.53.0
Mar30° / 24°23423.612.13.2
Apr30° / 23°14216.611.74.1
May29° / 21°841111.35.5
Jun28° / 19°547.411.16.3
Jul29° / 18°415.111.26.5
Aug31° / 20°506.211.55.2
Sep32° / 22°10610.211.94.0
Oct32° / 23°16116.712.33.3
Nov31° / 23°23919.512.73.2
Dec30° / 24°29925.412.92.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17426
27327
37228
47129
57030
67030
76832
86733
96733
106634
116535
126535
136436
146238
156139
166040
175941
185941
195842
205743
215644
225545
235446
245446
255347
265248
275149
285149
295050
304951

Chance of precipitation in September

Any precipitation

Trinidad gets around 106 mm of rain over 10.2 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 35% and peaks near 43% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
126
227
328
429
529
630
731
831
931
1032
1132
1233
1333
1434
1534
1635
1735
1835
1936
2036
2137
2237
2338
2439
2540
2641
2742
2842
2943
3043

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11171331371
21171331381
31071230391
41071230401
51071229411
6981229421
7981229421
8881128431
9881128441
10781128441
11781128451
12781127462
13671127462
14671127472
15671126482
16671126482
17671126492
18571025512
19571025503
20571025503
21571024513
2256924533
2346923544
2446922554
2545822574
2645821584
2735720605
2834719625
2934719616
3034718626

Wind in September

Winds average 9 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 6:28 AM to 6:05 AM, and sunset from 6:11 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:286:11
211.76:276:11
311.76:276:11
411.76:266:11
511.86:256:11
611.86:246:11
711.86:246:11
811.86:236:11
911.86:226:11
1011.86:216:11
1111.86:206:11
1211.96:206:11
1311.96:196:11
1411.96:186:11
1511.96:176:11
1611.96:166:11
1711.96:166:12
1811.96:156:12
1912.06:146:12
2012.06:136:12
2112.06:126:12
2212.06:126:12
2312.06:116:12
2412.06:106:12
2512.06:096:12
2612.16:086:12
2712.16:086:12
2812.16:076:12
2912.16:066:12
3012.16:056:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.56 kWh/m².

For context, solar energy here swings from a low near 3.98 kWh/m² to a high of 5.64 kWh/m² in October across the year — September's 5.56 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Trinidad

In seasonPeak

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

Trinidad's rainy season runs October–March, 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 Trinidad?

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

4.0
Sightseeing
6th-best month of the year
6.4
Beach & pool
5th-best month of the year

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

What to pack for Trinidad in September

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

In September, Trinidad sees daytime highs around 32°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Trinidad in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Trinidad peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 22UV 15Sep 13UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug8Very high
Sep6High
Oct10Extreme
Nov13Extreme
Dec13Extreme

Air quality in Trinidad 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 Trinidad is worst in September — around 86 µg/m³ PM2.5 (unhealthy), about 12.3× the cleanest month (May, 7 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateUnhealthyModerateSep 1781 µg/m³May 207 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Moderate
Mar12Good
Apr9Good
May7Good
Jun8Good
Jul13Moderate
Aug35Poor
Sep86Unhealthy
Oct49Poor
Nov23Moderate
Dec11Good
Location & terrain

Where is Trinidad?

Trinidad sits at 14.8°S, 64.9°W, 155 m above sea level, in Bolivia. The nearest listed city is San Borja, 198 km away.

San BorjaAscención de GuarayosCaranaviVilla YapacaníSacabaTiquipayaCochabambaPunata

Topography around Trinidad

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

Within 3 km, the terrain around Trinidad has only modest variations in elevation — a maximum elevation change of 11 m around an average of 154 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 38 m; within 80 km, only modest variations in elevation — a maximum elevation change of 50 m.

The land around Trinidad is covered by artificial surfaces (40%), grassland (30%) and trees (26%) within 3 km, grassland (47%) and trees (44%) within 16 km, and grassland (46%) and trees (45%) within 80 km.

3 km
11 m
16 km
38 m
80 km
50 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: San Borja 198 km · Ascención de Guarayos 218 km · Caranavi 306 km · Villa Yapacaní 308 km · Sacaba 310 km · Tiquipaya 312 km · Cochabamba 314 km · Punata 317 km

Bolivia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 40% of US
price level, 2025
GDP per capita
$5,148
2025
Happiness
5.8 / 10
World Happiness, 2025
Homicide rate
4.4
per 100k, 2023
Road deaths
21.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Moderate
EF EPI 521
Religion
Roman Catholic 65%Protestant 20%none 6%other 5%

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 Trinidad (-14.8322°, -64.9034°, elevation 155 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).