Nakhon Luang weather in September

In September, Nakhon Luang sees average daytime highs of 33°C and overnight lows near 26°C, with 262 mm of rain across 25.5 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 33°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 Nakhon Luang's 9th-clearest and 11th-windiest month. For the whole year in context, see Nakhon Luang's year-round climate.

Daytime high: 33°; 8th warmest
Overnight low: 26°; 7th coldest
Rainfall: 262 mm; 25.5 wet days
Daylight: 12 h 06 min; 6:09 AM – 6:14 PM
Cloud cover: 85%; 9th clearest
Wind: 7 km/h; 11th windiest
Solar energy: 4.56 kWh/m²
Travel score: 2.1; out of 10

← August Nakhon Luang year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical September day in Nakhon Luang reaches about 33°C in the afternoon and slips back to 26°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, September runs on par with August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	34	34	34	34	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33
Avg low (°C)	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26

	Avg high (°C)	Avg low (°C)
1	34	26
2	34	26
3	34	26
4	34	26
5	33	26
6	33	26
7	33	26
8	33	26
9	33	26
10	33	26
11	33	26
12	33	26
13	33	26
14	33	26
15	33	26
16	33	26
17	33	26
18	33	26
19	33	26
20	33	26
21	33	26
22	33	26
23	33	26
24	33	26
25	33	26
26	33	26
27	33	26
28	33	26
29	33	26
30	33	26

How September really feels in Nakhon Luang

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 feel dangerously hot (≥ 39°C)

Days feeling ≤ 0°C

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 Luang 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.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	33° / 22°	11	2.8	11.2	4.2
Feb	35° / 24°	14	3.1	11.5	3.3
Mar	36° / 26°	41	7.1	11.9	2.3
Apr	37° / 27°	77	12.8	12.3	1.5
May	36° / 27°	154	21.6	12.7	1.5
Jun	35° / 27°	142	22.8	12.8	1.7
Jul	34° / 26°	149	23.1	12.8	1.9
Aug	34° / 26°	178	24.5	12.5	1.9
Sep	33° / 26°	262	25.5	12.1	2.1
Oct	33° / 25°	151	18.7	11.7	2.9
Nov	33° / 24°	29	5	11.3	4.0
Dec	32° / 22°	8	1.4	11.2	4.7

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%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	6	6	6	5	6	6	6	6	6	8	8	8	8	8	8	9	10	10	11	13	13	13	13	13	14	14	15	15	16	17
Cloudier (%)	94	94	94	95	94	94	94	94	94	92	92	92	92	92	92	91	90	90	89	87	87	87	87	87	86	86	85	85	84	83

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	5	95
5	6	94
6	6	94
7	6	94
8	6	94
9	6	94
10	8	92
11	8	92
12	8	92
13	8	92
14	8	92
15	8	92
16	9	91
17	10	90
18	10	90
19	11	89
20	13	87
21	13	87
22	13	87
23	13	87
24	13	87
25	14	86
26	14	86
27	15	85
28	15	85
29	16	84
30	17	83

Chance of precipitation in September

Any precipitation

Nakhon Luang gets around 262 mm of rain over 25.5 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 86% and peaks near 87% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	87	87	87	87	87	87	87	87	87	87	87	86	86	86	86	86	86	85	85	85	85	84	84	84	84	84	84	83	83	83

	Rain chance (%)
1	87
2	87
3	87
4	87
5	87
6	87
7	87
8	87
9	87
10	87
11	87
12	86
13	86
14	86
15	86
16	86
17	86
18	85
19	85
20	85
21	85
22	84
23	84
24	84
25	84
26	84
27	84
28	83
29	83
30	83

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 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Oppressive (%)	28	27	27	26	25	25	24	24	23	23	22	22	21	20	19	18	17	16	15	14	14	13	12	12	12	11	11	11	12	12
Miserable (%)	72	73	73	74	75	75	76	76	77	77	78	78	79	80	81	82	83	84	85	86	86	87	88	88	88	89	89	89	88	88

	Oppressive (%)	Miserable (%)
1	28	72
2	27	73
3	27	73
4	26	74
5	25	75
6	25	75
7	24	76
8	24	76
9	23	77
10	23	77
11	22	78
12	22	78
13	21	79
14	20	80
15	19	81
16	18	82
17	17	83
18	16	84
19	15	85
20	14	86
21	14	86
22	13	87
23	12	88
24	12	88
25	12	88
26	11	89
27	11	89
28	11	89
29	12	88
30	12	88

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	9	9	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	7	7	7	7	7	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	9	calm
2	9	calm
3	8	calm
4	8	calm
5	8	calm
6	8	calm
7	8	calm
8	8	calm
9	8	calm
10	8	calm
11	8	calm
12	8	calm
13	8	calm
14	7	calm
15	7	calm
16	7	calm
17	7	calm
18	7	calm
19	7	calm
20	7	calm
21	7	calm
22	7	calm
23	7	calm
24	7	calm
25	7	calm
26	7	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm

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 6:09 AM to 6:10 AM, and sunset from 6:26 PM to 6:03 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.3	12.3	12.3	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9	11.9
Sunrise (AM)	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:10
Sunset (PM)	6:26	6:25	6:24	6:24	6:23	6:22	6:21	6:21	6:20	6:19	6:18	6:17	6:17	6:16	6:15	6:14	6:13	6:13	6:12	6:11	6:10	6:10	6:09	6:08	6:07	6:06	6:06	6:05	6:04	6:03

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.3	6:09	6:26
2	12.3	6:09	6:25
3	12.3	6:09	6:24
4	12.2	6:09	6:24
5	12.2	6:09	6:23
6	12.2	6:09	6:22
7	12.2	6:09	6:21
8	12.2	6:09	6:21
9	12.2	6:09	6:20
10	12.2	6:09	6:19
11	12.1	6:09	6:18
12	12.1	6:09	6:17
13	12.1	6:09	6:17
14	12.1	6:09	6:16
15	12.1	6:09	6:15
16	12.1	6:09	6:14
17	12.1	6:10	6:13
18	12.1	6:10	6:13
19	12.0	6:10	6:12
20	12.0	6:10	6:11
21	12.0	6:10	6:10
22	12.0	6:10	6:10
23	12.0	6:10	6:09
24	12.0	6:10	6:08
25	12.0	6:10	6:07
26	11.9	6:10	6:06
27	11.9	6:10	6:06
28	11.9	6:10	6:05
29	11.9	6:10	6:04
30	11.9	6:10	6:03

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 6.17 kWh/m² in April across the year — September's 4.56 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.6	Bright
2	4.6	Bright
3	4.6	Bright
4	4.6	Bright
5	4.6	Bright
6	4.6	Bright
7	4.6	Bright
8	4.6	Bright
9	4.6	Bright
10	4.6	Bright
11	4.6	Bright
12	4.6	Bright
13	4.5	Bright
14	4.5	Bright
15	4.5	Bright
16	4.5	Bright
17	4.5	Bright
18	4.5	Bright
19	4.5	Bright
20	4.5	Bright
21	4.5	Bright
22	4.5	Bright
23	4.5	Bright
24	4.5	Bright
25	4.5	Bright
26	4.5	Bright
27	4.5	Bright
28	4.5	Bright
29	4.5	Bright
30	4.5	Bright

Planning a trip in September

Hazard calendar for Nakhon Luang

In seasonPeak

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

Nakhon Luang'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 Nakhon Luang?

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

2.1

Sightseeing

7th-best month of the year

3.7

Beach & pool

10th-best month of the year

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

What to pack for Nakhon Luang in September

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

In September, Nakhon Luang sees daytime highs around 33°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Nakhon Luang 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 Nakhon Luang peaks around August 14 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	9	9	12	11	10	12	12	13	12	10	8	8
Level	Very high	Very high	Extreme	Extreme	Very high	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high

	UV index (midday)	Level
Jan	9	Very high
Feb	9	Very high
Mar	12	Extreme
Apr	11	Extreme
May	10	Very high
Jun	12	Extreme
Jul	12	Extreme
Aug	13	Extreme
Sep	12	Extreme
Oct	10	Very high
Nov	8	Very high
Dec	8	Very high

Air quality in Nakhon Luang 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 Luang is worst in January — around 83 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (July, 43 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	83	81	70	64	54	44	43	43	54	66	67	66
Level	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Poor	Poor	Poor	Poor	Poor	Unhealthy	Unhealthy	Unhealthy

	PM2.5 (µg/m³)	Level
Jan	83	Unhealthy
Feb	81	Unhealthy
Mar	70	Unhealthy
Apr	64	Unhealthy
May	54	Poor
Jun	44	Poor
Jul	43	Poor
Aug	43	Poor
Sep	54	Poor
Oct	66	Unhealthy
Nov	67	Unhealthy
Dec	66	Unhealthy

Location & terrain

Where is Nakhon Luang?

Nakhon Luang sits at 14.5°N, 100.6°E, 9 m above sea level, in Thailand. The nearest listed city is Ayutthaya, 13 km away.

Topography around Nakhon Luang

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

Within 3 km, the terrain around Nakhon Luang has only modest variations in elevation — a maximum elevation change of 19 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 43 m; within 80 km, large variations in elevation — a maximum elevation change of 1,116 m.

The land around Nakhon Luang is covered by cropland (45%) and trees (24%) within 3 km, cropland (58%) and trees (21%) within 16 km, and cropland (60%) and trees (24%) within 80 km.

3 km

19 m

cropland 45%

16 km

43 m

cropland 58%

80 km

1,116 m

cropland 60%

treesgrasslandcroplandartificial surfacesbare terrainwater

← August Nakhon Luang year-round climate October →Best places to visit in September

September weather nearby: Ayutthaya 13 km · Bang Ban 17 km · Tha Ruea 17 km · Ban Mo 21 km · Phak Hai 26 km · Bang Pa-in 26 km · Wang Noi 29 km · Nong Khae 31 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

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 Luang (14.4634°, 100.6088°, elevation 9 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).

	Avg high (°C)	Avg low (°C)
1	34	26
2	34	26
3	34	26
4	34	26
5	33	26
6	33	26
7	33	26
8	33	26
9	33	26
10	33	26
11	33	26
12	33	26
13	33	26
14	33	26
15	33	26
16	33	26
17	33	26
18	33	26
19	33	26
20	33	26
21	33	26
22	33	26
23	33	26
24	33	26
25	33	26
26	33	26
27	33	26
28	33	26
29	33	26
30	33	26

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	5	95
5	6	94
6	6	94
7	6	94
8	6	94
9	6	94
10	8	92
11	8	92
12	8	92
13	8	92
14	8	92
15	8	92
16	9	91
17	10	90
18	10	90
19	11	89
20	13	87
21	13	87
22	13	87
23	13	87
24	13	87
25	14	86
26	14	86
27	15	85
28	15	85
29	16	84
30	17	83

	Rain chance (%)
1	87
2	87
3	87
4	87
5	87
6	87
7	87
8	87
9	87
10	87
11	87
12	86
13	86
14	86
15	86
16	86
17	86
18	85
19	85
20	85
21	85
22	84
23	84
24	84
25	84
26	84
27	84
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	28	72
2	27	73
3	27	73
4	26	74
5	25	75
6	25	75
7	24	76
8	24	76
9	23	77
10	23	77
11	22	78
12	22	78
13	21	79
14	20	80
15	19	81
16	18	82
17	17	83
18	16	84
19	15	85
20	14	86
21	14	86
22	13	87
23	12	88
24	12	88
25	12	88
26	11	89
27	11	89
28	11	89
29	12	88
30	12	88

	Avg high (°C)	Avg low (°C)
1	34	26
2	34	26
3	34	26
4	34	26
5	33	26
6	33	26
7	33	26
8	33	26
9	33	26
10	33	26
11	33	26
12	33	26
13	33	26
14	33	26
15	33	26
16	33	26
17	33	26
18	33	26
19	33	26
20	33	26
21	33	26
22	33	26
23	33	26
24	33	26
25	33	26
26	33	26
27	33	26
28	33	26
29	33	26
30	33	26

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	5	95
5	6	94
6	6	94
7	6	94
8	6	94
9	6	94
10	8	92
11	8	92
12	8	92
13	8	92
14	8	92
15	8	92
16	9	91
17	10	90
18	10	90
19	11	89
20	13	87
21	13	87
22	13	87
23	13	87
24	13	87
25	14	86
26	14	86
27	15	85
28	15	85
29	16	84
30	17	83

	Rain chance (%)
1	87
2	87
3	87
4	87
5	87
6	87
7	87
8	87
9	87
10	87
11	87
12	86
13	86
14	86
15	86
16	86
17	86
18	85
19	85
20	85
21	85
22	84
23	84
24	84
25	84
26	84
27	84
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	28	72
2	27	73
3	27	73
4	26	74
5	25	75
6	25	75
7	24	76
8	24	76
9	23	77
10	23	77
11	22	78
12	22	78
13	21	79
14	20	80
15	19	81
16	18	82
17	17	83
18	16	84
19	15	85
20	14	86
21	14	86
22	13	87
23	12	88
24	12	88
25	12	88
26	11	89
27	11	89
28	11	89
29	12	88
30	12	88

	Avg high (°C)	Avg low (°C)
1	34	26
2	34	26
3	34	26
4	34	26
5	33	26
6	33	26
7	33	26
8	33	26
9	33	26
10	33	26
11	33	26
12	33	26
13	33	26
14	33	26
15	33	26
16	33	26
17	33	26
18	33	26
19	33	26
20	33	26
21	33	26
22	33	26
23	33	26
24	33	26
25	33	26
26	33	26
27	33	26
28	33	26
29	33	26
30	33	26

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	5	95
5	6	94
6	6	94
7	6	94
8	6	94
9	6	94
10	8	92
11	8	92
12	8	92
13	8	92
14	8	92
15	8	92
16	9	91
17	10	90
18	10	90
19	11	89
20	13	87
21	13	87
22	13	87
23	13	87
24	13	87
25	14	86
26	14	86
27	15	85
28	15	85
29	16	84
30	17	83

	Rain chance (%)
1	87
2	87
3	87
4	87
5	87
6	87
7	87
8	87
9	87
10	87
11	87
12	86
13	86
14	86
15	86
16	86
17	86
18	85
19	85
20	85
21	85
22	84
23	84
24	84
25	84
26	84
27	84
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	28	72
2	27	73
3	27	73
4	26	74
5	25	75
6	25	75
7	24	76
8	24	76
9	23	77
10	23	77
11	22	78
12	22	78
13	21	79
14	20	80
15	19	81
16	18	82
17	17	83
18	16	84
19	15	85
20	14	86
21	14	86
22	13	87
23	12	88
24	12	88
25	12	88
26	11	89
27	11	89
28	11	89
29	12	88
30	12	88