Krabi weather in September

In September, Krabi sees average daytime highs of 30°C and overnight lows near 25°C, with 320 mm of rain across 26.4 wet days and about 12 hours of daylight. It is the 12th-warmest and 2nd-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 2% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Krabi's 11th-clearest and 6th-windiest month. For the whole year in context, see Krabi's year-round climate.

Daytime high
30°
12th warmest
Overnight low
25°
7th coldest
Rainfall
320 mm
26.4 wet days
Daylight
12 hours
6:17 AM – 6:20 PM
Cloud cover
87%
11th clearest
Wind
9 km/h
6th windiest
Solar energy
4.63 kWh/m²
Travel score
3.0
out of 10

Krabi is town in Krabi 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 Krabi reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°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)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
213025
223025
233025
243025
253025
263025
273025
283025
293025
303025

How September really feels in Krabi

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.

Krabi weather by month

How September compares with the rest of the year at a glance. September is the 12th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°607.711.64.7
Feb32° / 24°456.511.74.4
Mar32° / 25°11313.211.93.7
Apr32° / 25°19022.912.22.8
May31° / 26°27827.212.42.6
Jun30° / 26°25724.712.53.0
Jul30° / 25°26725.512.43.1
Aug30° / 25°28326.112.33.1
Sep30° / 25°32026.4123.0
Oct30° / 25°35628.411.82.8
Nov30° / 24°24623.411.63.2
Dec30° / 24°1281411.54.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 6% of September, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1892
2892
3892
4892
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18892
19892
20892
21892
22892
23793
24793
25793
26694
27694
28595
29595
30595

Chance of precipitation in September

Any precipitation

Krabi gets around 320 mm of rain over 26.4 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 89% and peaks near 93% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
186
286
386
486
586
686
786
886
986
1087
1187
1287
1387
1488
1588
1688
1788
1889
1989
2090
2190
2291
2391
2491
2591
2692
2792
2892
2993
3093

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 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1496
2496
3496
4496
5496
6496
7496
8496
9496
10496
11397
12397
13397
14397
15397
16397
17397
18397
19397
20397
21397
22397
23397
24397
25397
26397
27397
28397
29397
30397

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
1210calm
1310calm
1410calm
1510calm
1610calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 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 18 minutes over September. Sunrise moves from 6:19 AM to 6:16 AM, and sunset from 6:29 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:196:29
212.16:196:28
312.16:196:28
412.16:196:27
512.16:196:27
612.16:196:26
712.16:196:25
812.16:196:25
912.16:186:24
1012.16:186:24
1112.16:186:23
1212.16:186:22
1312.16:186:22
1412.16:186:21
1512.16:186:21
1612.06:176:20
1712.06:176:19
1812.06:176:19
1912.06:176:18
2012.06:176:18
2112.06:176:17
2212.06:176:16
2312.06:166:16
2412.06:166:15
2512.06:166:15
2612.06:166:14
2712.06:166:13
2812.06:166:13
2911.96:166:12
3011.96:166:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.63 kWh/m².

For context, solar energy here swings from a low near 4.26 kWh/m² to a high of 6.06 kWh/m² in March across the year — September's 4.63 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in September

Hazard calendar for Krabi

In seasonPeak

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

Krabi sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

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

Is September a good time to visit Krabi?

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
4.0
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Krabi.

What to pack for Krabi in September

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

In September, Krabi sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

Sea temperature near Krabi in September

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

The sea at the nearest coast (about 22 km away) is warmest in May at about 30°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
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Krabi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Krabi peaks around April 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeApr 11UV 13Nov 23UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in Krabi 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 Krabi is worst in April — around 20 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1120 µg/m³Aug 1813 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb17Moderate
Mar19Moderate
Apr20Moderate
May16Moderate
Jun15Moderate
Jul16Moderate
Aug13Moderate
Sep15Moderate
Oct15Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Krabi?

Krabi sits at 8.1°N, 98.9°E, 14 m above sea level, in Thailand. The nearest listed city is Ao Nang, 11 km away.

Topography around Krabi

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

Within 3 km, the terrain around Krabi has only modest variations in elevation — a maximum elevation change of 58 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 534 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,369 m.

The land around Krabi is covered by mangroves (35%), trees (23%) and artificial surfaces (20%) within 3 km, trees (58%) and water (25%) within 16 km, and trees (58%) and water (37%) within 80 km.

3 km
58 m
16 km
534 m
80 km
1,369 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Ao Nang 11 km · Ko Phi Phi 40 km · Ban Ko Sire 57 km · Ban Ratsada 59 km · Phuket 60 km · Ban Talat Yai 60 km · Wichit 61 km · Ban Talat Nua 61 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 Krabi (8.0726°, 98.9105°, elevation 14 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). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).