Ban Mai weather in September

In September, Ban Mai sees average daytime highs of 31°C and overnight lows near 26°C, with 123 mm of rain across 21.7 wet days and about 12 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 4% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 06 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Ban Mai's 10th-clearest and 8th-windiest month. For the whole year in context, see Ban Mai's year-round climate.

Daytime high
31°
6th warmest
Overnight low
26°
7th coldest
Rainfall
123 mm
21.7 wet days
Daylight
12 hours
6:11 AM – 6:13 PM
Cloud cover
82%
10th clearest
Wind
9 km/h
8th windiest
Solar energy
5.47 kWh/m²
Travel score
3.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in Ban Mai reaches about 31°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

25°28°30°33°35°151015202530
Avg high (°C)Avg low (°C)
13126
23126
33126
43126
53126
63126
73126
83126
93126
103126
113126
123126
133126
143126
153126
163126
173126
183126
193126
203126
213126
223126
233126
243126
253126
263126
273126
283026
293026
303026

How September really feels in Ban Mai

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.

Ban Mai weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°1051411.65.2
Feb29° / 25°477.711.85.7
Mar30° / 25°8912.1124.8
Apr31° / 26°11217.212.23.7
May32° / 27°12021.712.33.0
Jun31° / 26°9517.812.43.3
Jul31° / 26°8617.212.43.4
Aug31° / 26°8617.312.23.4
Sep31° / 26°12321.7123.1
Oct30° / 26°27027.511.82.9
Nov29° / 25°4032711.73.2
Dec28° / 25°33822.411.64.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 87%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11387
21387
31387
41387
51486
61486
71486
81486
91486
101387
111387
121387
131387
141387
151486
161486
171486
181486
191387
201387
211387
221387
231387
241387
251288
261288
271288
281288
291189
301189

Chance of precipitation in September

Any precipitation

Ban Mai gets around 123 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 72% and peaks near 82% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
168
269
369
469
569
669
769
869
969
1069
1169
1269
1369
1469
1569
1670
1770
1871
1972
2072
2173
2274
2375
2476
2577
2678
2779
2880
2981
3082

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
14060
24159
34159
44159
54159
64258
74258
84357
94357
104456
114456
124456
134456
144357
154357
164258
174258
184159
194060
204060
213961
223862
233862
243763
253664
263664
273565
283565
293466
303466

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 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
1410calm
1510calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 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 12 minutes over September. Sunrise moves from 6:13 AM to 6:09 AM, and sunset from 6:22 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:136:22
212.16:136:21
312.16:136:21
412.16:136:20
512.16:136:20
612.16:136:19
712.16:126:18
812.16:126:18
912.16:126:17
1012.16:126:17
1112.16:126:16
1212.16:126:16
1312.16:116:15
1412.16:116:14
1512.06:116:14
1612.06:116:13
1712.06:116:13
1812.06:116:12
1912.06:106:12
2012.06:106:11
2112.06:106:10
2212.06:106:10
2312.06:106:09
2412.06:106:09
2512.06:106:08
2612.06:096:08
2712.06:096:07
2812.06:096:07
2912.06:096:06
3011.96:096:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.47 kWh/m².

For context, solar energy here swings from a low near 4.23 kWh/m² to a high of 6.36 kWh/m² in March across the year — September's 5.47 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for Ban Mai

In seasonPeak

In September, Ban Mai sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Ban Mai sits in the Pacific typhoon belt; the season peaks July–October.

Ban Mai's monsoon runs October–December, when most of the year's rain falls.

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

Is September a good time to visit Ban Mai?

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

3.1
Sightseeing
10th-best month of the year
4.6
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Ban Mai.

What to pack for Ban Mai in September

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

In September, Ban Mai sees daytime highs around 31°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Ban Mai 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 May at about 31°C and coldest in January near 28°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
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun31Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Ban Mai 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 Ban Mai peaks around February 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 21UV 13Dec 12UV 11
UV index (midday)Level
Jan11Extreme
Feb14Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Ban Mai 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 Ban Mai is worst in June — around 19 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (November, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJun 2119 µg/m³Nov 2212 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb13Moderate
Mar13Moderate
Apr16Moderate
May16Moderate
Jun19Moderate
Jul19Moderate
Aug16Moderate
Sep17Moderate
Oct16Moderate
Nov11Good
Dec12Good
Location & terrain

Where is Ban Mai?

Ban Mai sits at 7.2°N, 100.5°E, 6 m above sea level, in Thailand. The nearest listed city is Songkhla, 6.0 km away.

Topography around Ban Mai

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

Within 3 km, the terrain around Ban Mai has only modest variations in elevation — a maximum elevation change of 164 m around an average of 8 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 290 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,229 m.

The land around Ban Mai is covered by water (52%) and trees (33%) within 3 km, water (57%) and trees (26%) within 16 km, and trees (56%) and water (36%) within 80 km.

3 km
164 m
16 km
290 m
80 km
1,229 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Songkhla 6.0 km · Hat Yai 23 km · Sadao 64 km · Ranot 68 km · Phatthalung 69 km · Satun 83 km · Pattani 86 km · Changloon 87 km

Thailand travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$8,057
2025
Happiness
6.3 / 10
World Happiness, 2025
Homicide rate
4.8
per 100k, 2011
Road deaths
32.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 402
Religion
Buddhist 93%Muslim 5%Christian 1%other 1%

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 Ban Mai (7.2041°, 100.5451°, elevation 6 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).