Pa Sang weather in May

In May, Pa Sang sees average daytime highs of 35°C and overnight lows near 25°C, with 130 mm of rain across 15.5 wet days and about 12.9 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 36°C in the first days to 34°C by the end. The sky is clear or mostly clear about 23% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of May to 13 hours by month's end. Set against the rest of the year, May is Pa Sang's 8th-clearest and 4th-windiest month. For the whole year in context, see Pa Sang's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
25°
11th coldest
Rainfall
130 mm
15.5 wet days
Daylight
12 h 54 min
5:54 AM – 6:47 PM
Cloud cover
69%
8th clearest
Wind
5 km/h
4th windiest
Solar energy
5.34 kWh/m²
Travel score
2.2
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 36°C in the first days to 34°C by the end.

A typical May day in Pa Sang reaches about 35°C in the afternoon and slips back to 25°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 39°C. Set against its neighbours, May runs about 2°C cooler than April and about 1°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13625
23625
33625
43625
53625
63625
73625
83525
93525
103525
113525
123525
133525
143525
153525
163525
173525
183525
193425
203425
213425
223425
233425
243425
253425
263425
273425
283425
293425
303425
313425

How May really feels in Pa Sang

Once humidity and wind are folded in, May averages 31 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
31
28 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

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

Pa Sang weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 16°81.6116.5
Feb33° / 17°40.911.44.7
Mar35° / 20°172.611.92.9
Apr37° / 24°457.112.41.8
May35° / 25°13015.512.92.2
Jun33° / 25°12818.113.12.4
Jul33° / 25°15420.4132.6
Aug32° / 25°21423.412.62.7
Sep32° / 24°22622.912.12.7
Oct31° / 23°13117.711.63.7
Nov30° / 20°295.411.15.6
Dec29° / 17°111.710.97.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 62%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26238
36040
45842
55743
65446
75347
85149
94951
104753
114456
124357
134159
143961
153763
163565
173367
183268
193169
202971
212872
222773
232575
242476
252278
262278
272278
282080
292080
301882
311783

Chance of precipitation in May

Any precipitation

Pa Sang gets around 130 mm of rain over 15.5 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 51% and peaks near 59% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
139
240
340
441
541
642
743
844
945
1046
1148
1249
1350
1452
1553
1653
1754
1854
1955
2055
2155
2256
2356
2456
2556
2657
2757
2857
2958
3058
3159

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 66% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
111040490
211038510
31937530
41836541
51835551
61734571
70633601
80632602
90531622
100430642
110429643
120327673
130326674
140325684
150224695
160222715
170121726
180120727
190119737
200118738
210117739
2200167410
2300157411
2400147412
2500137413
2600137314
2700127315
2800127216
2900117217
3000117217
3100117118

Wind in May

Winds average 5 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over May. Sunrise moves from 6:02 AM to 5:51 AM, and sunset from 6:41 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:026:41
212.76:016:42
312.76:006:42
412.76:006:42
512.75:596:43
612.75:596:43
712.85:586:43
812.85:586:44
912.85:576:44
1012.85:576:44
1112.85:566:45
1212.85:566:45
1312.85:566:45
1412.85:556:46
1512.95:556:46
1612.95:546:47
1712.95:546:47
1812.95:546:47
1912.95:536:48
2012.95:536:48
2112.95:536:48
2212.95:536:49
2312.95:526:49
2413.05:526:50
2513.05:526:50
2613.05:526:50
2713.05:526:51
2813.05:516:51
2913.05:516:52
3013.05:516:52
3113.05:516:52

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.34 kWh/m².

For context, solar energy here swings from a low near 4 kWh/m² to a high of 6.29 kWh/m² in March across the year — May's 5.34 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in May

Hazard calendar for Pa Sang

In seasonPeak

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

Pa Sang'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 May a good time to visit Pa Sang?

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

2.2
Sightseeing
11th-best month of the year
4.7
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Pa Sang.

What to pack for Pa Sang in May

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

In May, Pa Sang sees daytime highs around 35°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

UV index in Pa Sang in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Pa Sang peaks around August 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 13UV 13Dec 22UV 7
UV index (midday)Level
Jan7Very high
Feb10Very high
Mar9Very high
Apr10Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Pa Sang in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Pa Sang is worst in March — around 69 µg/m³ PM2.5 (unhealthy), about 4.3× the cleanest month (July, 16 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyModerateMar 2067 µg/m³Jul 1216 µg/m³
PM2.5 (µg/m³)Level
Jan37Poor
Feb46Poor
Mar69Unhealthy
Apr61Unhealthy
May28Moderate
Jun16Moderate
Jul16Moderate
Aug17Moderate
Sep21Moderate
Oct25Moderate
Nov28Moderate
Dec32Moderate
Location & terrain

Where is Pa Sang?

Pa Sang sits at 18.5°N, 98.9°E, 295 m above sea level, in Thailand. The nearest listed city is Lamphun, 9.0 km away.

ThoenPai

Topography around Pa Sang

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

Within 3 km, the terrain around Pa Sang has only modest variations in elevation — a maximum elevation change of 20 m around an average of 292 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 363 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,375 m.

The land around Pa Sang is covered by trees (46%) and cropland (34%) within 3 km, trees (51%) and cropland (29%) within 16 km, and trees (81%) within 80 km.

3 km
20 m
16 km
363 m
80 km
2,375 m
treesshrubsgrasslandcroplandartificial surfaceswater
May weather nearby: Lamphun 9.0 km · San Pa Tong 12 km · Hang Dong 18 km · Chiang Mai 30 km · San Kamphaeng 31 km · Lampang 64 km · Thoen 106 km · Pai 107 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 Pa Sang (18.5262°, 98.9394°, elevation 295 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).