Kathu weather in September

In September, Kathu sees average daytime highs of 28°C and overnight lows near 26°C, with 286 mm of rain across 24.8 wet days and about 12 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels oppressive.

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 Kathu's 12th-clearest and 3rd-windiest month. For the whole year in context, see Kathu's year-round climate.

Daytime high
28°
10th warmest
Overnight low
26°
5th coldest
Rainfall
286 mm
24.8 wet days
Daylight
12 hours
6:20 AM – 6:22 PM
Cloud cover
86%
12th clearest
Wind
18 km/h
3rd windiest
Solar energy
5.03 kWh/m²
Travel score
3.9
out of 10

Kathu is town in Phuket province, Thailand.

Founded
1957

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 28°C through the month.

A typical September day in Kathu reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826

How September really feels in Kathu

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Kathu weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 26°528.111.66.3
Feb28° / 26°234.411.76.6
Mar29° / 27°8410.911.95.6
Apr29° / 27°12618.112.24.4
May29° / 27°24724.812.43.5
Jun29° / 27°22421.812.53.8
Jul28° / 27°21922.512.43.9
Aug28° / 27°24122.612.34.0
Sep28° / 26°28624.8123.9
Oct28° / 26°30327.411.83.7
Nov28° / 26°20021.611.64.4
Dec28° / 26°8912.111.55.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 6% of September, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1991
2991
31090
41090
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
161090
171090
181090
19991
20991
21991
22892
23892
24892
25892
26892
27892
28892
29892
30892

Chance of precipitation in September

Any precipitation

Kathu gets around 286 mm of rain over 24.8 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 82% and peaks near 88% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
179
280
380
480
580
681
781
881
981
1082
1182
1282
1381
1481
1581
1681
1781
1882
1982
2083
2183
2284
2384
2484
2585
2685
2786
2886
2987
3088

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
14951
25050
35149
45248
55347
65347
75446
85446
95446
105446
115446
125347
135347
145347
155446
165446
175446
185545
195545
205644
215743
225842
235941
246040
256139
266238
276337
286436
296535
306634

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

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 6:22 AM to 6:18 AM, and sunset from 6:31 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:226:31
212.16:226:30
312.16:226:30
412.16:216:29
512.16:216:29
612.16:216:28
712.16:216:28
812.16:216:27
912.16:216:26
1012.16:216:26
1112.16:206:25
1212.16:206:25
1312.16:206:24
1412.16:206:23
1512.16:206:23
1612.06:206:22
1712.06:206:22
1812.06:196:21
1912.06:196:20
2012.06:196:20
2112.06:196:19
2212.06:196:19
2312.06:196:18
2412.06:196:18
2512.06:186:17
2612.06:186:16
2712.06:186:16
2812.06:186:15
2911.96:186:15
3011.96:186:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m².

For context, solar energy here swings from a low near 4.76 kWh/m² to a high of 6.49 kWh/m² in March across the year — September's 5.03 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Kathu

In seasonPeak

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

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

Kathu's rainy season runs May–November, when most of the year's rain falls.

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

Is September a good time to visit Kathu?

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

3.9
Sightseeing
8th-best month of the year
4.2
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Kathu.

What to pack for Kathu in September

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

In September, Kathu sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Kathu 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 23 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
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Kathu 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 Kathu peaks around August 23 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeAug 23UV 13Nov 23UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in Kathu 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 Kathu is worst in March — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2216 µg/m³Nov 1211 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar16Moderate
Apr16Moderate
May12Moderate
Jun13Moderate
Jul13Moderate
Aug11Good
Sep12Good
Oct11Good
Nov11Good
Dec12Good
Location & terrain

Where is Kathu?

Kathu sits at 7.9°N, 98.3°E, 36 m above sea level, in Thailand. The nearest listed city is Wichit, 7.0 km away.

Topography around Kathu

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

Within 3 km, the terrain around Kathu has significant variations in elevation — a maximum elevation change of 521 m around an average of 135 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 536 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,369 m.

The land around Kathu is covered by trees (73%) within 3 km, water (52%) and trees (33%) within 16 km, and water (75%) and trees (21%) within 80 km.

3 km
521 m
16 km
536 m
80 km
1,369 m
treesgrasslandartificial surfaceswatermangroves
September weather nearby: Wichit 7.0 km · Ban Talat Nua 7.0 km · Ban Kamala 7.0 km · Ban Ratsada 8.0 km · Phuket 8.0 km · Ban Chalong 8.0 km · Ban Talat Yai 8.0 km · Ban Ko Sire 11 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 Kathu (7.9178°, 98.3332°, elevation 36 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).