Bua Yai weather in September

In September, Bua Yai sees average daytime highs of 32°C and overnight lows near 25°C, with 234 mm of rain across 24.4 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 5% 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 Bua Yai's 9th-clearest and 12th-windiest month. For the whole year in context, see Bua Yai's year-round climate.

Daytime high
32°
8th warmest
Overnight low
25°
7th coldest
Rainfall
234 mm
24.4 wet days
Daylight
12 h 06 min
6:02 AM – 6:07 PM
Cloud cover
84%
9th clearest
Wind
7 km/h
12th windiest
Solar energy
4.56 kWh/m²
Travel score
2.5
out of 10

Bua Yai is town in Nakhon Ratchasima province, Thailand.

Founded
1955

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 Bua Yai reaches about 32°C in the afternoon and slips back to 25°C overnight — a 7°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 on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143225
153225
163225
173225
183225
193225
203225
213225
223225
233225
243225
253225
263225
273225
283225
293225
303225

How September really feels in Bua Yai

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.

Bua Yai 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° / 19°71.611.25.6
Feb34° / 21°102.311.54.0
Mar36° / 24°396.811.92.4
Apr36° / 26°7012.712.31.8
May35° / 26°15520.812.71.8
Jun34° / 26°13119.912.92.0
Jul33° / 26°14921.312.82.3
Aug33° / 26°18922.412.52.4
Sep32° / 25°23424.412.12.5
Oct32° / 24°1281511.63.7
Nov31° / 22°28411.35.1
Dec30° / 19°61.611.16.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% 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 86%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1595
2595
3694
4694
5694
6793
7793
8892
9892
10991
111090
121090
131288
141288
151486
161486
171684
181684
191684
201882
211882
221981
232080
242080
252179
262278
272278
282278
292476
302476

Chance of precipitation in September

Any precipitation

Bua Yai gets around 234 mm of rain over 24.4 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 81% and peaks near 83% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
182
282
382
482
583
683
783
883
983
1083
1183
1283
1383
1483
1583
1683
1782
1882
1982
2081
2181
2280
2380
2479
2579
2678
2778
2877
2976
3075

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
104456
204456
304456
404456
504456
604357
704357
804258
904258
1004159
1104159
1214059
1314059
1414059
1514059
1613960
1713960
1813960
1913960
2013861
2113861
2223860
2323959
2423959
2524058
2624058
2734156
2834255
2934354
3044452

Wind in September

Winds average 7 km/h in September, the calmest month.

Across September, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:01 AM to 6:03 AM, and sunset from 6:19 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:016:19
212.36:016:18
312.36:016:18
412.36:016:17
512.26:016:16
612.26:016:15
712.26:016:15
812.26:016:14
912.26:016:13
1012.26:026:12
1112.26:026:11
1212.16:026:10
1312.16:026:10
1412.16:026:09
1512.16:026:08
1612.16:026:07
1712.16:026:06
1812.16:026:06
1912.06:026:05
2012.06:026:04
2112.06:026:03
2212.06:036:02
2312.06:036:01
2412.06:036:01
2512.06:036:00
2611.96:035:59
2711.96:035:58
2811.96:035:57
2911.96:035:57
3011.96:035:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.56 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.56 kWh/m² to a high of 6.13 kWh/m² in April across the year — September's 4.56 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
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
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Bua Yai

In seasonPeak

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

Bua Yai's monsoon runs May–October, 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 Bua Yai?

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

2.5
Sightseeing
6th-best month of the year
4.1
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Bua Yai.

What to pack for Bua Yai in September

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

In September, Bua Yai sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

UV index in Bua Yai 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 Bua Yai peaks around August 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 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 13UV 13Nov 23UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar12Extreme
Apr10Extreme
May10Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Bua Yai 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 Bua Yai is worst in March — around 50 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (June, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 1549 µg/m³Jun 2221 µg/m³
PM2.5 (µg/m³)Level
Jan32Moderate
Feb43Poor
Mar50Poor
Apr39Poor
May29Moderate
Jun21Moderate
Jul22Moderate
Aug23Moderate
Sep27Moderate
Oct30Moderate
Nov26Moderate
Dec24Moderate
Location & terrain

Where is Bua Yai?

Bua Yai sits at 15.6°N, 102.4°E, 177 m above sea level, in Thailand. The nearest listed city is Non Sung, 49 km away.

Kaset Sombun

Topography around Bua Yai

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

Within 3 km, the terrain around Bua Yai has only modest variations in elevation — a maximum elevation change of 30 m around an average of 171 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 83 m; within 80 km, large variations in elevation — a maximum elevation change of 793 m.

The land around Bua Yai is covered by cropland (50%) and trees (24%) within 3 km, cropland (83%) within 16 km, and cropland (82%) within 80 km.

3 km
30 m
16 km
83 m
80 km
793 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Non Sung 49 km · Chaiyaphum 49 km · Kaeng Khro 61 km · Ban Phai 62 km · Ban Huai Thalaeng 71 km · Nakhon Ratchasima 77 km · Dan Khun Thot 82 km · Kaset Sombun 92 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 Bua Yai (15.5855°, 102.4259°, elevation 177 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).