Chon Daen weather in September

In September, Chon Daen sees average daytime highs of 31°C and overnight lows near 25°C, with 312 mm of rain across 27.4 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 1st-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 4% 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 Chon Daen's 9th-clearest and 11th-windiest month. For the whole year in context, see Chon Daen's year-round climate.

Daytime high: 31°; 10th warmest
Overnight low: 25°; 7th coldest
Rainfall: 312 mm; 27.4 wet days
Daylight: 12 h 06 min; 6:08 AM – 6:14 PM
Cloud cover: 85%; 9th clearest
Wind: 5 km/h; 11th windiest
Solar energy: 4.32 kWh/m²
Travel score: 2.4; out of 10

← August Chon Daen 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 31°C through the month.

A typical September day in Chon Daen reaches about 31°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 29°C and 33°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)	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	32	32	32	32	32	32
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25

	Avg high (°C)	Avg low (°C)
1	31	25
2	31	25
3	31	25
4	31	25
5	31	25
6	31	25
7	31	25
8	31	25
9	31	25
10	31	25
11	31	25
12	31	25
13	31	25
14	31	25
15	31	25
16	31	25
17	31	25
18	31	25
19	31	25
20	31	25
21	31	25
22	31	25
23	31	25
24	31	25
25	32	25
26	32	25
27	32	25
28	32	25
29	32	25
30	32	25

How September really feels in Chon Daen

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

28 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.

Chon Daen weather by month

How September compares with the rest of the year at a glance. September is the 10th-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	32° / 19°	10	1.8	11.1	5.3
Feb	33° / 21°	12	2.4	11.5	4.1
Mar	35° / 24°	31	5.6	11.9	2.8
Apr	36° / 26°	59	10.2	12.4	2.0
May	34° / 26°	183	21.7	12.7	2.0
Jun	33° / 26°	215	25.3	12.9	2.1
Jul	32° / 25°	249	26.7	12.9	2.4
Aug	31° / 25°	308	28.7	12.5	2.3
Sep	31° / 25°	312	27.4	12.1	2.4
Oct	32° / 24°	150	17.7	11.6	3.4
Nov	32° / 22°	29	4.2	11.2	4.7
Dec	31° / 19°	8	1.4	11.1	5.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 87%. Skies tend to open up as the month goes on.

	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 (%)	4	4	4	4	4	5	6	6	6	8	8	8	9	10	10	11	13	13	14	15	18	19	20	20	21	22	23	24	24	26
Cloudier (%)	96	96	96	96	96	95	94	94	94	92	92	92	91	90	90	89	87	87	86	85	82	81	80	80	79	78	77	76	76	74

	Clearer (%)	Cloudier (%)
1	4	96
2	4	96
3	4	96
4	4	96
5	4	96
6	5	95
7	6	94
8	6	94
9	6	94
10	8	92
11	8	92
12	8	92
13	9	91
14	10	90
15	10	90
16	11	89
17	13	87
18	13	87
19	14	86
20	15	85
21	18	82
22	19	81
23	20	80
24	20	80
25	21	79
26	22	78
27	23	77
28	24	76
29	24	76
30	26	74

Chance of precipitation in September

Any precipitation

Chon Daen gets around 312 mm of rain over 27.4 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 91% and peaks near 95% on the wettest days. The odds ease toward the end of the month.

	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 (%)	93	93	94	94	94	94	95	94	94	94	94	93	93	93	92	92	91	91	90	90	89	89	88	88	88	87	87	86	85	84

	Rain chance (%)
1	93
2	93
3	94
4	94
5	94
6	94
7	95
8	94
9	94
10	94
11	94
12	93
13	93
14	93
15	92
16	92
17	91
18	91
19	90
20	90
21	89
22	89
23	88
24	88
25	88
26	87
27	87
28	86
29	85
30	84

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 90% 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 (%)	6	6	6	6	7	7	7	7	7	7	7	8	8	8	9	9	10	10	11	11	12	12	13	14	14	15	16	17	19	20
Miserable (%)	94	94	94	94	93	93	93	93	93	93	93	92	92	92	91	91	90	90	89	89	88	88	87	86	86	85	84	83	81	80

	Oppressive (%)	Miserable (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	7	93
6	7	93
7	7	93
8	7	93
9	7	93
10	7	93
11	7	93
12	8	92
13	8	92
14	8	92
15	9	91
16	9	91
17	10	90
18	10	90
19	11	89
20	11	89
21	12	88
22	12	88
23	13	87
24	14	86
25	14	86
26	15	85
27	16	84
28	17	83
29	19	81
30	20	80

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 5 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)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	4	4	4	4	4	4	4	4	4	4	4	4
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	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	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 6:07 AM to 6:10 AM, and sunset from 6:26 PM to 6:02 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	12.3	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	12.0	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9	11.9	11.9
Sunrise (AM)	6:07	6:07	6:07	6:07	6:07	6:07	6:07	6:07	6:08	6:08	6:08	6:08	6:08	6:08	6:08	6:08	6:08	6:08	6:08	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:10	6:10
Sunset (PM)	6:26	6:25	6:24	6:23	6:23	6:22	6:21	6:20	6:19	6:19	6:18	6:17	6:16	6:15	6:14	6:14	6:13	6:12	6:11	6:10	6:09	6:09	6:08	6:07	6:06	6:05	6:04	6:04	6:03	6:02

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.3	6:07	6:26
2	12.3	6:07	6:25
3	12.3	6:07	6:24
4	12.3	6:07	6:23
5	12.3	6:07	6:23
6	12.2	6:07	6:22
7	12.2	6:07	6:21
8	12.2	6:07	6:20
9	12.2	6:08	6:19
10	12.2	6:08	6:19
11	12.2	6:08	6:18
12	12.2	6:08	6:17
13	12.1	6:08	6:16
14	12.1	6:08	6:15
15	12.1	6:08	6:14
16	12.1	6:08	6:14
17	12.1	6:08	6:13
18	12.1	6:08	6:12
19	12.0	6:08	6:11
20	12.0	6:09	6:10
21	12.0	6:09	6:09
22	12.0	6:09	6:09
23	12.0	6:09	6:08
24	12.0	6:09	6:07
25	11.9	6:09	6:06
26	11.9	6:09	6:05
27	11.9	6:09	6:04
28	11.9	6:09	6:04
29	11.9	6:10	6:03
30	11.9	6:10	6:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.32 kWh/m².

For context, solar energy here swings from a low near 4.18 kWh/m² to a high of 6.3 kWh/m² in April across the year — September's 4.32 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)	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.4	4.4	4.4	4.4	4.4	4.4	4.4
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	4.2	Bright
2	4.2	Bright
3	4.2	Bright
4	4.2	Bright
5	4.2	Bright
6	4.2	Bright
7	4.2	Bright
8	4.2	Bright
9	4.2	Bright
10	4.2	Bright
11	4.2	Bright
12	4.2	Bright
13	4.3	Bright
14	4.3	Bright
15	4.3	Bright
16	4.3	Bright
17	4.3	Bright
18	4.3	Bright
19	4.3	Bright
20	4.3	Bright
21	4.3	Bright
22	4.3	Bright
23	4.3	Bright
24	4.4	Bright
25	4.4	Bright
26	4.4	Bright
27	4.4	Bright
28	4.4	Bright
29	4.4	Bright
30	4.4	Bright

Planning a trip in September

Hazard calendar for Chon Daen

In seasonPeak

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

Chon Daen'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 Chon Daen?

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

2.4

Sightseeing

7th-best month of the year

3.7

Beach & pool

11th-best month of the year

September is a weaker month for outdoor sightseeing in Chon Daen.

What to pack for Chon Daen in September

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

In September, Chon Daen sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

UV index in Chon Daen 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 Chon Daen peaks around August 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 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	10	11	10	11	12	12	13	12	10	8	8
Level	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

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

Air quality in Chon Daen 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 Chon Daen is worst in March — around 56 µg/m³ PM2.5 (unhealthy), about 2.5× the cleanest month (June, 23 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)	47	52	56	46	32	23	24	24	28	34	38	42
Level	Poor	Poor	Unhealthy	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Poor

	PM2.5 (µg/m³)	Level
Jan	47	Poor
Feb	52	Poor
Mar	56	Unhealthy
Apr	46	Poor
May	32	Moderate
Jun	23	Moderate
Jul	24	Moderate
Aug	24	Moderate
Sep	28	Moderate
Oct	34	Moderate
Nov	38	Poor
Dec	42	Poor

Location & terrain

Where is Chon Daen?

Chon Daen sits at 16.2°N, 100.9°E, 106 m above sea level, in Thailand. The nearest listed city is Thap Khlo, 28 km away.

Topography around Chon Daen

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

Within 3 km, the terrain around Chon Daen has only modest variations in elevation — a maximum elevation change of 81 m around an average of 107 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,018 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,544 m.

The land around Chon Daen is covered by cropland (49%) and trees (35%) within 3 km, trees (54%) and cropland (37%) within 16 km, and cropland (55%) and trees (41%) within 80 km.

3 km

81 m

cropland 49%

16 km

1,018 m

trees 54%

80 km

1,544 m

cropland 55%

treesgrasslandcroplandartificial surfaces

← August Chon Daen year-round climate October →Best places to visit in September

September weather nearby: Thap Khlo 28 km · Nong Phai 31 km · Phetchabun 41 km · Taphan Hin 47 km · Bang Mun Nak 54 km · Phichit 61 km · Wichian Buri 65 km · Bang Krathum 74 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 Chon Daen (16.1895°, 100.8596°, elevation 106 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	31	25
2	31	25
3	31	25
4	31	25
5	31	25
6	31	25
7	31	25
8	31	25
9	31	25
10	31	25
11	31	25
12	31	25
13	31	25
14	31	25
15	31	25
16	31	25
17	31	25
18	31	25
19	31	25
20	31	25
21	31	25
22	31	25
23	31	25
24	31	25
25	32	25
26	32	25
27	32	25
28	32	25
29	32	25
30	32	25

	Clearer (%)	Cloudier (%)
1	4	96
2	4	96
3	4	96
4	4	96
5	4	96
6	5	95
7	6	94
8	6	94
9	6	94
10	8	92
11	8	92
12	8	92
13	9	91
14	10	90
15	10	90
16	11	89
17	13	87
18	13	87
19	14	86
20	15	85
21	18	82
22	19	81
23	20	80
24	20	80
25	21	79
26	22	78
27	23	77
28	24	76
29	24	76
30	26	74

	Rain chance (%)
1	93
2	93
3	94
4	94
5	94
6	94
7	95
8	94
9	94
10	94
11	94
12	93
13	93
14	93
15	92
16	92
17	91
18	91
19	90
20	90
21	89
22	89
23	88
24	88
25	88
26	87
27	87
28	86
29	85
30	84

	Oppressive (%)	Miserable (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	7	93
6	7	93
7	7	93
8	7	93
9	7	93
10	7	93
11	7	93
12	8	92
13	8	92
14	8	92
15	9	91
16	9	91
17	10	90
18	10	90
19	11	89
20	11	89
21	12	88
22	12	88
23	13	87
24	14	86
25	14	86
26	15	85
27	16	84
28	17	83
29	19	81
30	20	80

	Avg high (°C)	Avg low (°C)
1	31	25
2	31	25
3	31	25
4	31	25
5	31	25
6	31	25
7	31	25
8	31	25
9	31	25
10	31	25
11	31	25
12	31	25
13	31	25
14	31	25
15	31	25
16	31	25
17	31	25
18	31	25
19	31	25
20	31	25
21	31	25
22	31	25
23	31	25
24	31	25
25	32	25
26	32	25
27	32	25
28	32	25
29	32	25
30	32	25

	Clearer (%)	Cloudier (%)
1	4	96
2	4	96
3	4	96
4	4	96
5	4	96
6	5	95
7	6	94
8	6	94
9	6	94
10	8	92
11	8	92
12	8	92
13	9	91
14	10	90
15	10	90
16	11	89
17	13	87
18	13	87
19	14	86
20	15	85
21	18	82
22	19	81
23	20	80
24	20	80
25	21	79
26	22	78
27	23	77
28	24	76
29	24	76
30	26	74

	Rain chance (%)
1	93
2	93
3	94
4	94
5	94
6	94
7	95
8	94
9	94
10	94
11	94
12	93
13	93
14	93
15	92
16	92
17	91
18	91
19	90
20	90
21	89
22	89
23	88
24	88
25	88
26	87
27	87
28	86
29	85
30	84

	Oppressive (%)	Miserable (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	7	93
6	7	93
7	7	93
8	7	93
9	7	93
10	7	93
11	7	93
12	8	92
13	8	92
14	8	92
15	9	91
16	9	91
17	10	90
18	10	90
19	11	89
20	11	89
21	12	88
22	12	88
23	13	87
24	14	86
25	14	86
26	15	85
27	16	84
28	17	83
29	19	81
30	20	80

	Avg high (°C)	Avg low (°C)
1	31	25
2	31	25
3	31	25
4	31	25
5	31	25
6	31	25
7	31	25
8	31	25
9	31	25
10	31	25
11	31	25
12	31	25
13	31	25
14	31	25
15	31	25
16	31	25
17	31	25
18	31	25
19	31	25
20	31	25
21	31	25
22	31	25
23	31	25
24	31	25
25	32	25
26	32	25
27	32	25
28	32	25
29	32	25
30	32	25

	Clearer (%)	Cloudier (%)
1	4	96
2	4	96
3	4	96
4	4	96
5	4	96
6	5	95
7	6	94
8	6	94
9	6	94
10	8	92
11	8	92
12	8	92
13	9	91
14	10	90
15	10	90
16	11	89
17	13	87
18	13	87
19	14	86
20	15	85
21	18	82
22	19	81
23	20	80
24	20	80
25	21	79
26	22	78
27	23	77
28	24	76
29	24	76
30	26	74

	Rain chance (%)
1	93
2	93
3	94
4	94
5	94
6	94
7	95
8	94
9	94
10	94
11	94
12	93
13	93
14	93
15	92
16	92
17	91
18	91
19	90
20	90
21	89
22	89
23	88
24	88
25	88
26	87
27	87
28	86
29	85
30	84

	Oppressive (%)	Miserable (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	7	93
6	7	93
7	7	93
8	7	93
9	7	93
10	7	93
11	7	93
12	8	92
13	8	92
14	8	92
15	9	91
16	9	91
17	10	90
18	10	90
19	11	89
20	11	89
21	12	88
22	12	88
23	13	87
24	14	86
25	14	86
26	15	85
27	16	84
28	17	83
29	19	81
30	20	80