Khlong Yai in Fall

In fall (September, October and November), Khlong Yai sees average daytime highs around 30°C and overnight lows near 23°C, with 1001 mm of rain over about 72 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.

Over the season highs climb from about 29°C in early September to 31°C by late November. The sky is clear or mostly clear about 9% of the time across fall, and the air most often feels oppressive.

Fall is Khlong Yai's 2nd-best season to visit on our travel score. For the whole year in context, see Khlong Yai's year-round climate.

Avg daytime high
30°C
3rd-warmest season
Avg overnight low
23°C
Rainfall
1001 mm
72 wet days
Avg wind
5 km/h
Travel score
3.3
2nd-best season
Months
Sep · Oct · Nov

Temperature in Khlong Yai in Fall

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 29°C in early September to 31°C by late November.

A typical fall day in Khlong Yai reaches about 30°C and drops to 23°C overnight. The warmest of the three months is November, the coolest November.

20°25°30°35°SepOctNov

How fall really feels in Khlong Yai

Once humidity and wind are folded in, fall brings about 91 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C
91
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Khlong Yai weather by month

How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 21°569.511.44.6
Feb31° / 22°7813.311.64.2
Mar31° / 23°15921.911.93.4
Apr31° / 24°21526.312.32.7
May30° / 24°33729.612.52.6
Jun29° / 24°47129.112.72.8
Jul28° / 24°58230.412.62.9
Aug28° / 24°58330.612.42.9
Sep29° / 23°51229.612.12.8
Oct30° / 23°37527.311.73.0
Nov31° / 22°11514.711.54.0
Dec31° / 22°386.711.34.8

Cloud cover in Fall

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time across fall.

0%25%50%75%100%SepOctNov

Chance of precipitation in Fall

Any precipitation

Khlong Yai gets around 1001 mm of rain over 72 wet days across fall. The line is the day-by-day chance of measurable precipitation.

0%20%40%60%80%100%SepOctNov

Humidity in Fall

DryComfortableHumidMuggyOppressiveMiserable

Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

0%25%50%75%100%SepOctNov

Wind in Fall

Winds average 5 km/h across fall.

0246810SepOctNov

Sunrise & sunset in Fall

DaylightNight

Daylight runs from about 12 h 12 min in early September to 11 h 24 min by late November. The lit band spans sunrise to sunset each day.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMSepOctNov

Solar energy in Fall

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across fall, about 4.4 kWh/m².

024SepOctNov
Planning a trip in fall

Hazard calendar for Khlong Yai

In seasonPeak

In fall, Khlong Yai overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

Khlong Yai sits in the Pacific typhoon belt; the season peaks July–October.

Khlong Yai's monsoon runs May–October, when most of the year's rain falls.

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

Is fall a good time to visit Khlong Yai?

Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

3.3
Sightseeing
2nd-best month of the year
4.5
Beach & pool
2nd-best month of the year

fall is a weaker month for outdoor sightseeing in Khlong Yai.

What to pack for Khlong Yai in Fall

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

In fall, Khlong Yai sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 72 days see rain.

light clothesrain gearsun protection

Sea temperature near Khlong Yai in Fall

The nearest coast averages about 29°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 31°C and coldest in January near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Khlong Yai in Fall

LowModerateHighVery highExtreme

Clear-sky midday UV across fall averages 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 Khlong Yai peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 18UV 14Dec 13UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Khlong Yai in Fall

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.

Air quality in Khlong Yai is worst in February — around 40 µg/m³ PM2.5 (poor), about 3.8× the cleanest month (November, 11 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateGoodFeb 1539 µg/m³Nov 1411 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb40Poor
Mar27Moderate
Apr19Moderate
May13Moderate
Jun12Moderate
Jul13Moderate
Aug12Good
Sep11Good
Oct11Good
Nov11Good
Dec12Good
Location & terrain

Where is Khlong Yai?

Khlong Yai sits at 11.8°N, 102.9°E, 45 m above sea level, in Thailand. The nearest listed city is Koh Kong, 21 km away.

Laem SingPailin

Topography around Khlong Yai

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

Within 3 km, the terrain around Khlong Yai has significant variations in elevation — a maximum elevation change of 324 m around an average of 57 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 741 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,728 m.

The land around Khlong Yai is covered by trees (52%) and water (34%) within 3 km, trees (49%) and water (44%) within 16 km, and trees (52%) and water (42%) within 80 km.

3 km
324 m
16 km
741 m
80 km
1,728 m
treesgrasslandcroplandartificial surfaceswatermangroves
Fall weather nearby: Koh Kong 21 km · Smach Mean Chey 30 km · Trat 66 km · Laem Ngop 69 km · Ko Chang 71 km · Khao Saming 81 km · Laem Sing 118 km · Pailin 123 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 Khlong Yai (11.7765°, 102.8873°, elevation 45 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.