Tailândia weather in September

In September, Tailândia sees average daytime highs of 35°C and overnight lows near 24°C, with 22 mm of rain across 4.7 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 46% of the time in September, and the air most often feels oppressive.

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 Tailândia's 3rd-clearest and 1st-windiest month. For the whole year in context, see Tailândia's year-round climate.

Daytime high
35°
1st warmest
Overnight low
24°
10th coldest
Rainfall
22 mm
4.7 wet days
Daylight
12 hours
6:11 AM – 6:10 PM
Cloud cover
46%
3rd clearest
Wind
8 km/h
1st windiest
Solar energy
6.18 kWh/m²
Travel score
2.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical September day in Tailândia reaches about 35°C in the afternoon and slips back to 24°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 37°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13523
23523
33524
43524
53524
63524
73524
83524
93524
103524
113524
123524
133524
143524
153524
163524
173524
183524
193524
203524
213524
223524
233524
243524
253524
263524
273524
283524
293524
303524

How September really feels in Tailândia

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
30 feel dangerously hot (≥ 39°C)
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.

Tailândia weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°28226.512.22.5
Feb31° / 23°32625.812.12.4
Mar31° / 23°39629.6122.4
Apr31° / 23°32628.111.92.5
May31° / 23°19423.811.92.9
Jun32° / 23°6513.711.83.7
Jul33° / 22°378.711.83.7
Aug35° / 23°194.511.93.1
Sep35° / 24°224.7122.8
Oct35° / 24°337.512.12.7
Nov34° / 24°7710.312.12.7
Dec33° / 24°14918.112.22.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 33% of September, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28416
38317
48317
58317
68317
78317
88218
98218
108218
118218
128218
138119
148119
158020
168020
178020
187921
197921
207723
217723
227723
237624
247624
257525
267525
277426
287327
297228
307129

Chance of precipitation in September

Any precipitation

Tailândia gets around 22 mm of rain over 4.7 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 16% and peaks near 20% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
115
216
316
416
516
615
715
815
915
1015
1115
1215
1315
1415
1515
1615
1715
1815
1915
2016
2116
2217
2317
2417
2518
2618
2719
2819
2919
3020

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 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1123760
2123751
3123751
4124741
5124741
6125731
7125731
8125731
9125731
10125740
11125740
12125740
13125740
14125740
15025750
16025750
17025750
18024760
19024760
20024760
21024760
22023770
23023770
24023770
25023770
26023770
27022780
28022780
29022780
30022771

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:17 AM to 6:04 AM, and sunset from 6:14 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:176:14
211.96:176:14
311.96:166:13
412.06:166:13
512.06:166:13
612.06:156:13
712.06:156:12
812.06:146:12
912.06:146:12
1012.06:136:11
1112.06:136:11
1212.06:126:11
1312.06:126:11
1412.06:126:10
1512.06:116:10
1612.06:116:10
1712.06:106:09
1812.06:106:09
1912.06:096:09
2012.06:096:09
2112.06:086:08
2212.06:086:08
2312.06:076:08
2412.06:076:07
2512.06:076:07
2612.06:066:07
2712.06:066:07
2812.06:056:06
2912.06:056:06
3012.06:046:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.18 kWh/m².

For context, solar energy here swings from a low near 4.11 kWh/m² to a high of 6.29 kWh/m² in October across the year — September's 6.18 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Intense
46.0Intense
56.0Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Tailândia

In seasonPeak

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

Tailândia's monsoon runs January–May, when most of the year's rain falls.

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

Is September a good time to visit Tailândia?

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

2.8
Sightseeing
5th-best month of the year
6.2
Beach & pool
3rd-best month of the year

September is a weaker month for outdoor sightseeing in Tailândia. The water and warmth also suit a beach or pool day.

What to pack for Tailândia in September

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

In September, Tailândia sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Tailândia 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 Tailândia peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 15Nov 23UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun11Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Very high
Dec10Very high

Air quality in Tailândia 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 Tailândia is worst in November — around 38 µg/m³ PM2.5 (poor), about 3.7× the cleanest month (June, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateModerateNov 1536 µg/m³Jun 1010 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun10Good
Jul12Moderate
Aug15Moderate
Sep18Moderate
Oct26Moderate
Nov38Poor
Dec22Moderate
Location & terrain

Where is Tailândia?

Tailândia sits at 2.9°S, 49.0°W, 47 m above sea level, in Brazil. The nearest listed city is Mocajuba, 74 km away.

Topography around Tailândia

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

Within 3 km, the terrain around Tailândia has only modest variations in elevation — a maximum elevation change of 29 m around an average of 48 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 75 m; within 80 km, only modest variations in elevation — a maximum elevation change of 153 m.

The land around Tailândia is covered by grassland (60%) and artificial surfaces (23%) within 3 km, grassland (56%) and trees (42%) within 16 km, and trees (77%) and grassland (22%) within 80 km.

3 km
29 m
16 km
75 m
80 km
153 m
treesgrasslandartificial surfacesbare terrainwater
September weather nearby: Mocajuba 74 km · Baião 82 km · Cametá 99 km · Goianésia do Pará 101 km · Tomé-Açu 107 km · Igarapé Miri 108 km · Moju 120 km · Tucuruí 122 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Tailândia (-2.9472°, -48.9531°, elevation 47 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).