Samut Songkhram weather in September

In September, Samut Songkhram sees average daytime highs of 32°C and overnight lows near 26°C, with 217 mm of rain across 24.6 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 1st-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 3% 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 Samut Songkhram's 9th-clearest and 11th-windiest month. For the whole year in context, see Samut Songkhram's year-round climate.

Daytime high
32°
8th warmest
Overnight low
26°
7th coldest
Rainfall
217 mm
24.6 wet days
Daylight
12 h 06 min
6:12 AM – 6:17 PM
Cloud cover
86%
9th clearest
Wind
6 km/h
11th windiest
Solar energy
4.58 kWh/m²
Travel score
2.3
out of 10

Samut Songkhram is town in Samut Songkhram province, Thailand.

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 Samut Songkhram reaches about 32°C in the afternoon and slips back to 26°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13326
23326
33326
43326
53326
63326
73326
83326
93326
103326
113326
123326
133326
143326
153226
163226
173226
183226
193226
203226
213226
223226
233226
243226
253226
263226
273226
283226
293226
303226

How September really feels in Samut Songkhram

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.

Samut Songkhram weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°132.211.35.4
Feb33° / 24°112.411.64.6
Mar34° / 26°426.411.93.5
Apr35° / 27°7010.212.32.4
May35° / 27°13321.712.61.9
Jun34° / 27°12221.212.82.1
Jul33° / 27°13122.712.72.3
Aug33° / 26°14623.612.42.3
Sep32° / 26°21724.612.12.3
Oct32° / 25°20721.211.73.1
Nov32° / 24°496.911.44.5
Dec31° / 23°112.311.25.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 90%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1892
2892
3892
4793
5793
6892
7892
8892
9793
10892
11892
12892
13892
14892
15892
16892
17892
18991
191090
201090
211090
221288
231288
241288
251288
261387
271387
281387
291486
301486

Chance of precipitation in September

Any precipitation

Samut Songkhram gets around 217 mm of rain over 24.6 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 83% and peaks near 85% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
180
280
380
480
580
681
781
881
982
1082
1182
1283
1383
1484
1584
1684
1784
1884
1984
2084
2184
2284
2384
2484
2584
2685
2785
2885
2985
3085

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

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
13862
23862
33763
43664
53664
63565
73565
83466
93367
103367
113169
123070
132971
142872
152674
162575
172476
182278
192179
201981
211882
221684
231585
241486
251387
261288
271189
281090
291090
30991

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 6:12 AM to 6:12 AM, and sunset from 6:28 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:126:28
212.36:126:27
312.26:126:26
412.26:126:25
512.26:126:25
612.26:126:24
712.26:126:23
812.26:126:23
912.26:126:22
1012.26:126:21
1112.16:126:20
1212.16:126:20
1312.16:126:19
1412.16:126:18
1512.16:126:17
1612.16:126:17
1712.16:126:16
1812.06:126:15
1912.06:126:14
2012.06:126:14
2112.06:126:13
2212.06:126:12
2312.06:126:11
2412.06:126:11
2512.06:126:10
2611.96:126:09
2711.96:126:08
2811.96:126:08
2911.96:126:07
3011.96:126:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 4.48 kWh/m² to a high of 6.27 kWh/m² in April across the year — September's 4.58 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in September

Hazard calendar for Samut Songkhram

In seasonPeak

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

Samut Songkhram sits in the Pacific typhoon belt; the season peaks July–October.

Samut Songkhram's monsoon runs May–October, 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 Samut Songkhram?

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

2.3
Sightseeing
8th-best month of the year
3.9
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Samut Songkhram.

What to pack for Samut Songkhram in September

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

In September, Samut Songkhram sees daytime highs around 32°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Samut Songkhram 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 at the nearest coast (about 14 km away) is warmest in May at about 31°C and coldest in January 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
Feb28Warm
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Samut Songkhram 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 Samut Songkhram peaks around August 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 20 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 highAug 15UV 13Nov 20UV 8
UV index (midday)Level
Jan8Very high
Feb9Very high
Mar12Extreme
Apr11Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec9Very high

Air quality in Samut Songkhram 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 Samut Songkhram is worst in February — around 61 µg/m³ PM2.5 (unhealthy), about 2.6× the cleanest month (August, 24 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorFeb 1861 µg/m³Aug 1024 µg/m³
PM2.5 (µg/m³)Level
Jan58Unhealthy
Feb61Unhealthy
Mar60Unhealthy
Apr47Poor
May33Moderate
Jun24Moderate
Jul24Moderate
Aug24Moderate
Sep29Moderate
Oct46Poor
Nov48Poor
Dec48Poor
Location & terrain

Where is Samut Songkhram?

Samut Songkhram sits at 13.4°N, 100.0°E, 7 m above sea level, in Thailand. The nearest listed city is Damnoen Saduak, 13 km away.

Topography around Samut Songkhram

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

Within 3 km, the terrain around Samut Songkhram has only modest variations in elevation — a maximum elevation change of 15 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 21 m; within 80 km, large variations in elevation — a maximum elevation change of 1,189 m.

The land around Samut Songkhram is covered by trees (36%) and artificial surfaces (35%) within 3 km, water (41%) and trees (40%) within 16 km, and trees (35%), water (29%) and cropland (20%) within 80 km.

3 km
15 m
16 km
21 m
80 km
1,189 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Damnoen Saduak 13 km · Ban Phaeo 23 km · Ratchaburi 24 km · Khao Yoi 27 km · Bang Phae 32 km · Samut Sakhon 33 km · Phetchaburi 34 km · Ban I Chang 35 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 Samut Songkhram (13.4146°, 100.0026°, elevation 7 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).