Sawankhalok weather in September

In September, Sawankhalok sees average daytime highs of 33°C and overnight lows near 26°C, with 224 mm of rain across 22.7 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 2nd-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 6% 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 Sawankhalok's 9th-clearest and 9th-windiest month. For the whole year in context, see Sawankhalok's year-round climate.

Daytime high
33°
7th warmest
Overnight low
26°
7th coldest
Rainfall
224 mm
22.7 wet days
Daylight
12 h 06 min
6:12 AM – 6:18 PM
Cloud cover
83%
9th clearest
Wind
5 km/h
9th windiest
Solar energy
4.45 kWh/m²
Travel score
2.2
out of 10

Sawankhalok is town in Sukhothai province, Thailand.

Founded
1937

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 33°C through the month.

A typical September day in Sawankhalok 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.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13326
23326
33326
43326
53326
63326
73326
83326
93326
103326
113326
123326
133326
143326
153326
163326
173326
183326
193326
203326
213326
223326
233326
243326
253326
263326
273326
283326
293326
303326

How September really feels in Sawankhalok

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
30 feel dangerously hot (≥ 39°C)
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.

Sawankhalok weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 19°162.311.14.9
Feb35° / 21°101.111.43.3
Mar38° / 24°313.711.91.5
Apr39° / 27°638.912.40.7
May36° / 27°2011912.81.4
Jun35° / 27°18020.4131.9
Jul34° / 27°18421.312.92.2
Aug33° / 26°23122.812.62.3
Sep33° / 26°22422.712.12.2
Oct33° / 25°13114.811.63.1
Nov33° / 23°274.111.24.3
Dec32° / 20°132115.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 84%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1793
2793
3793
4793
5892
6892
7991
8991
9991
101090
111090
121090
131189
141189
151387
161486
171585
181684
191783
201882
212080
222179
232377
242377
252575
262773
272971
282971
293169
303367

Chance of precipitation in September

Any precipitation

Sawankhalok gets around 224 mm of rain over 22.7 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 76% and peaks near 79% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
176
277
377
478
578
678
779
879
979
1079
1179
1279
1379
1479
1579
1679
1778
1877
1977
2076
2175
2274
2374
2473
2572
2672
2771
2870
2969
3069

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 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
101288
201288
301288
401189
501189
601090
701090
80991
90991
100892
110892
120793
130793
140694
150694
160694
170694
180694
190595
200595
210595
220595
230595
240595
250694
260694
270694
281693
291792
301792

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 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 6:10 AM to 6:14 AM, and sunset from 6:31 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:106:31
212.36:106:30
312.36:106:29
412.36:116:28
512.36:116:27
612.36:116:27
712.26:116:26
812.26:116:25
912.26:116:24
1012.26:116:23
1112.26:116:22
1212.26:126:21
1312.16:126:21
1412.16:126:20
1512.16:126:19
1612.16:126:18
1712.16:126:17
1812.16:126:16
1912.06:126:15
2012.06:136:14
2112.06:136:14
2212.06:136:13
2312.06:136:12
2412.06:136:11
2511.96:136:10
2611.96:136:09
2711.96:146:08
2811.96:146:08
2911.96:146:07
3011.96:146:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.45 kWh/m².

For context, solar energy here swings from a low near 4.06 kWh/m² to a high of 6.39 kWh/m² in April across the year — September's 4.45 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Sawankhalok

In seasonPeak

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

Sawankhalok'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 Sawankhalok?

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

2.2
Sightseeing
7th-best month of the year
4.1
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Sawankhalok.

What to pack for Sawankhalok in September

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

In September, Sawankhalok sees daytime highs around 33°C and nights near 26°C. Pack light clothes and rain gear. About 23 days see rain.

light clothesrain gear

UV index in Sawankhalok in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks 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 Sawankhalok peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 12UV 13Dec 11UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar10Extreme
Apr10Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7Very high

Air quality in Sawankhalok 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 Sawankhalok is worst in March — around 58 µg/m³ PM2.5 (unhealthy), about 2.8× the cleanest month (June, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorPoorModeratePoorMar 1556 µg/m³Jun 2221 µg/m³
PM2.5 (µg/m³)Level
Jan43Poor
Feb50Poor
Mar58Unhealthy
Apr47Poor
May29Moderate
Jun21Moderate
Jul22Moderate
Aug23Moderate
Sep26Moderate
Oct31Moderate
Nov33Moderate
Dec37Poor
Location & terrain

Where is Sawankhalok?

Sawankhalok sits at 17.3°N, 99.8°E, 67 m above sea level, in Thailand. The nearest listed city is Si Satchanalai, 24 km away.

Topography around Sawankhalok

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

Within 3 km, the terrain around Sawankhalok has only modest variations in elevation — a maximum elevation change of 27 m around an average of 61 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 253 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,205 m.

The land around Sawankhalok is covered by cropland (51%) and trees (32%) within 3 km, cropland (74%) and trees (22%) within 16 km, and trees (53%) and cropland (44%) within 80 km.

3 km
27 m
16 km
253 m
80 km
1,205 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Si Satchanalai 24 km · Sukhothai 34 km · Ban Na 35 km · Uttaradit 44 km · Bang Rakam 69 km · Phitsanulok 71 km · Ban Aranyik 73 km · Thoen 73 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 Sawankhalok (17.316°, 99.8319°, elevation 67 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).