Nakhon Phanom weather in September

In September, Nakhon Phanom sees average daytime highs of 30°C and overnight lows near 24°C, with 318 mm of rain across 24.7 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 30°C through the month. The sky is clear or mostly clear about 10% 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 Nakhon Phanom's 9th-clearest and 12th-windiest month. For the whole year in context, see Nakhon Phanom's year-round climate.

Daytime high
30°
6th warmest
Overnight low
24°
8th coldest
Rainfall
318 mm
24.7 wet days
Daylight
12 h 06 min
5:52 AM – 5:58 PM
Cloud cover
80%
9th clearest
Wind
5 km/h
12th windiest
Solar energy
4.19 kWh/m²
Travel score
3.0
out of 10

Nakhon Phanom is town in Nakhon Phanom 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 30°C through the month.

A typical September day in Nakhon Phanom reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°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)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
213124
223124
233124
243124
253124
263124
273124
283123
293123
303123

How September really feels in Nakhon Phanom

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.

Nakhon Phanom 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°61.511.17.4
Feb30° / 18°132.511.46.2
Mar32° / 21°345.611.94.6
Apr33° / 23°6911.512.43.4
May32° / 24°25323.712.82.7
Jun31° / 25°37827.6132.5
Jul30° / 24°49029.412.92.7
Aug30° / 24°49329.912.62.6
Sep30° / 24°31824.712.13.0
Oct31° / 22°11111.411.64.5
Nov30° / 19°202.611.26.0
Dec28° / 16°61.2117.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11090
21090
31090
41090
51090
61090
71387
81387
91387
101486
111585
121684
131783
141882
151981
162179
172377
182377
192575
202773
212872
223070
233268
243268
253466
263565
273565
283763
293862
303961

Chance of precipitation in September

Any precipitation

Nakhon Phanom gets around 318 mm of rain over 24.7 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 82% 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
295
394
494
593
692
792
891
990
1089
1188
1287
1386
1485
1584
1682
1781
1880
1979
2077
2176
2275
2373
2472
2570
2669
2767
2865
2964
3062

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 66% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
101288
201387
301486
401585
501684
611782
711881
812079
912178
1012277
1122375
1222573
1322672
1432770
1532968
1643066
1743165
1843264
1953461
2053560
2163658
2263856
2373954
2474152
2584250
2694448
2794545
28104643
29114841
30124939

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 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 5:50 AM to 5:54 AM, and sunset from 6:11 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:506:11
212.35:506:10
312.35:516:09
412.35:516:08
512.35:516:08
612.35:516:07
712.25:516:06
812.25:516:05
912.25:516:04
1012.25:526:03
1112.25:526:02
1212.25:526:02
1312.15:526:01
1412.15:526:00
1512.15:525:59
1612.15:525:58
1712.15:525:57
1812.15:535:56
1912.05:535:55
2012.05:535:55
2112.05:535:54
2212.05:535:53
2312.05:535:52
2412.05:535:51
2511.95:545:50
2611.95:545:49
2711.95:545:49
2811.95:545:48
2911.95:545:47
3011.95:545:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.19 kWh/m².

For context, solar energy here swings from a low near 3.85 kWh/m² to a high of 5.98 kWh/m² in April across the year — September's 4.19 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
104.0Moderate
114.0Bright
124.0Bright
134.1Bright
144.1Bright
154.1Bright
164.2Bright
174.2Bright
184.3Bright
194.3Bright
204.3Bright
214.4Bright
224.4Bright
234.4Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Nakhon Phanom

In seasonPeak

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

Nakhon Phanom sits in the Pacific typhoon belt; the season peaks July–October.

Nakhon Phanom's monsoon runs May–September, 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 Nakhon Phanom?

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

3.0
Sightseeing
8th-best month of the year
4.3
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Nakhon Phanom.

What to pack for Nakhon Phanom in September

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

In September, Nakhon Phanom sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. About 25 days see rain.

light clothesrain gear

UV index in Nakhon Phanom 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 Nakhon Phanom peaks around July 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 highExtremeExtremeVery highJul 18UV 13Dec 14UV 8
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar11Extreme
Apr10Very high
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Nakhon Phanom 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 Nakhon Phanom is worst in March — around 84 µg/m³ PM2.5 (unhealthy), about 5.6× the cleanest month (November, 15 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateMar 1879 µg/m³Nov 1715 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb39Poor
Mar84Unhealthy
Apr49Poor
May23Moderate
Jun19Moderate
Jul18Moderate
Aug19Moderate
Sep17Moderate
Oct18Moderate
Nov15Moderate
Dec17Moderate
Location & terrain

Where is Nakhon Phanom?

Nakhon Phanom sits at 17.4°N, 104.8°E, 154 m above sea level, in Thailand. The nearest listed city is Tha Khaek, 6.0 km away.

SavannakhetMukdahanSekaKhao WongBan Kèngkok

Topography around Nakhon Phanom

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

Within 3 km, the terrain around Nakhon Phanom has only modest variations in elevation — a maximum elevation change of 40 m around an average of 145 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 577 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,431 m.

The land around Nakhon Phanom is covered by trees (33%), artificial surfaces (22%) and cropland (20%) within 3 km, trees (55%) and cropland (29%) within 16 km, and trees (64%) and cropland (28%) within 80 km.

3 km
40 m
16 km
577 m
80 km
1,431 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Tha Khaek 6.0 km · Sakon Nakhon 73 km · Ban Xénô 85 km · Savannakhet 93 km · Mukdahan 96 km · Seka 105 km · Khao Wong 108 km · Ban Kèngkok 116 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 Nakhon Phanom (17.4108°, 104.7786°, elevation 154 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). 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).