Seka weather in September

In September, Seka sees average daytime highs of 31°C and overnight lows near 25°C, with 313 mm of rain across 24.2 wet days and about 12.1 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 13% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Seka's 9th-clearest and 12th-windiest month. For the whole year in context, see Seka's year-round climate.

Daytime high
31°
6th warmest
Overnight low
25°
8th coldest
Rainfall
313 mm
24.2 wet days
Daylight
12 h 06 min
5:56 AM – 6:02 PM
Cloud cover
79%
9th clearest
Wind
5 km/h
12th windiest
Solar energy
4.31 kWh/m²
Travel score
2.9
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 Seka reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°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)
13125
23125
33125
43125
53125
63125
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233124
243124
253124
263124
273124
283124
293124
303124

How September really feels in Seka

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.

Seka 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° / 16°81.6117.3
Feb30° / 18°162.511.46.2
Mar32° / 21°396.111.94.5
Apr33° / 24°6911.812.43.2
May32° / 25°27924.612.82.5
Jun31° / 25°4052813.12.3
Jul31° / 25°51129.5132.5
Aug30° / 25°49930.112.62.5
Sep31° / 25°31324.212.12.9
Oct31° / 23°8610.511.64.3
Nov31° / 20°162.411.25.7
Dec29° / 17°61.110.97.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 76%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1991
21090
31090
41090
51189
61288
71387
81486
91486
101684
111684
121882
131981
142179
152278
162476
172575
182773
192872
203169
213268
223367
233565
243664
253763
263961
274060
284159
294258
304357

Chance of precipitation in September

Any precipitation

Seka gets around 313 mm of rain over 24.2 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 80% and peaks near 95% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
195
294
394
493
593
692
792
891
990
1089
1188
1287
1386
1484
1583
1682
1780
1879
1977
2076
2174
2272
2371
2469
2567
2666
2764
2863
2961
3059

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 78% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100694
200694
300793
400892
500892
601990
7011089
8011089
9011188
10011287
11011386
12021484
13021484
14031582
15031681
16031780
17041878
18041977
19052075
20052174
21062272
22062470
23072568
24072766
25082864
26082963
27093160
280103258
291113355
301113553

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 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 30 minutes over September. Sunrise moves from 5:53 AM to 5:58 AM, and sunset from 6:15 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:536:15
212.35:536:14
312.35:546:13
412.35:546:12
512.35:546:11
612.35:546:10
712.35:546:09
812.25:546:09
912.25:546:08
1012.25:556:07
1112.25:556:06
1212.25:556:05
1312.25:556:04
1412.15:556:03
1512.15:556:02
1612.15:566:02
1712.15:566:01
1812.15:566:00
1912.05:565:59
2012.05:565:58
2112.05:565:57
2212.05:565:56
2312.05:575:55
2412.05:575:54
2511.95:575:54
2611.95:575:53
2711.95:575:52
2811.95:575:51
2911.95:585:50
3011.95:585:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.31 kWh/m².

For context, solar energy here swings from a low near 3.87 kWh/m² to a high of 5.99 kWh/m² in April across the year — September's 4.31 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
54.0Moderate
64.0Moderate
74.0Moderate
84.0Bright
94.0Bright
104.1Bright
114.1Bright
124.1Bright
134.2Bright
144.2Bright
154.3Bright
164.3Bright
174.3Bright
184.4Bright
194.4Bright
204.5Bright
214.5Bright
224.5Bright
234.6Bright
244.6Bright
254.6Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.8Bright
Planning a trip in September

Hazard calendar for Seka

In seasonPeak

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

Seka's monsoon runs May–September, 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 Seka?

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

2.9
Sightseeing
8th-best month of the year
4.3
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Seka.

What to pack for Seka in September

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

In September, Seka sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. About 24 days see rain.

light clothesrain gear

UV index in Seka in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Seka peaks around July 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJul 17UV 13Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar11Extreme
Apr10Very high
May11Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov8Very high
Dec7Very high

Air quality in Seka 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 Seka is worst in April — around 86 µg/m³ PM2.5 (unhealthy), about 5.7× the cleanest month (September, 15 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateApr 1085 µg/m³Sep 1615 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb38Poor
Mar80Unhealthy
Apr86Unhealthy
May24Moderate
Jun17Moderate
Jul17Moderate
Aug17Moderate
Sep15Moderate
Oct17Moderate
Nov16Moderate
Dec19Moderate
Location & terrain

Where is Seka?

Seka sits at 17.9°N, 104.0°E, 158 m above sea level, in Thailand. The nearest listed city is Pakxan, 60 km away.

Nakhon Phanom

Topography around Seka

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

Within 3 km, the terrain around Seka has only modest variations in elevation — a maximum elevation change of 36 m around an average of 155 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 409 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,360 m.

The land around Seka is covered by trees (52%) and cropland (31%) within 3 km, trees (53%) and cropland (36%) within 16 km, and trees (60%) and cropland (34%) within 80 km.

3 km
36 m
16 km
409 m
80 km
1,360 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Pakxan 60 km · Sawang Daen Din 73 km · Borikhan 75 km · Ban Dung 78 km · Warichaphum 78 km · Phon Charoen 84 km · Sakon Nakhon 88 km · Nakhon Phanom 105 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 Seka (17.9285°, 103.9552°, elevation 158 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).