Mae Chan weather in May

In May, Mae Chan sees average daytime highs of 32°C and overnight lows near 23°C, with 282 mm of rain across 22.2 wet days and about 12.9 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 21% 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 h 06 min by month's end. Set against the rest of the year, May is Mae Chan's 8th-clearest and 5th-windiest month. For the whole year in context, see Mae Chan's year-round climate.

Daytime high
32°
3rd warmest
Overnight low
23°
8th coldest
Rainfall
282 mm
22.2 wet days
Daylight
13 hours
5:48 AM – 6:45 PM
Cloud cover
69%
8th clearest
Wind
4 km/h
5th windiest
Solar energy
5.45 kWh/m²
Travel score
2.9
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical May day in Mae Chan reaches about 32°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 36°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13322
23322
33222
43222
53222
63222
73222
83222
93222
103222
113222
123222
133222
143222
153223
163223
173223
183223
193223
203223
213223
223223
233223
243223
253223
263223
273123
283123
293123
303123
313123

How May really feels in Mae Chan

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
heat index over the day's high
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.

Mae Chan 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
Jan27° / 13°232.910.98.0
Feb30° / 14°142.311.36.3
Mar33° / 17°395.111.94.5
Apr33° / 20°12211.712.43.3
May32° / 23°28222.212.92.9
Jun31° / 24°32426.713.22.5
Jul30° / 24°4222913.12.6
Aug30° / 23°39329.212.72.6
Sep30° / 23°28625.112.13.1
Oct29° / 21°13417.511.54.5
Nov28° / 18°486.3116.9
Dec26° / 14°273.710.88.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% 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 (%)
16436
26436
36238
46139
55941
65842
75545
85446
95149
105050
114654
124555
134357
144060
153862
163763
173466
183268
193070
203070
212872
222773
232575
242377
252278
262080
271981
281783
291585
301585
311387

Chance of precipitation in May

Any precipitation

Mae Chan gets around 282 mm of rain over 22.2 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 72% and peaks near 86% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
157
258
359
460
561
662
763
864
965
1066
1168
1269
1370
1471
1571
1672
1773
1874
1975
2076
2176
2277
2378
2479
2579
2680
2781
2882
2983
3084
3186

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 78% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1538570
2436600
3434620
4432640
5429670
6427681
7325711
8323731
9322741
10320761
11319771
12217801
13216811
14215812
15214822
16213832
17113833
18112843
19111853
20111844
21110854
22110854
2319855
2419855
2508866
2607867
2707858
2806859
29058510
30058411
31048313

Wind in May

Winds average 4 km/h in May.

Across May, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:56 AM to 5:44 AM, and sunset from 6:40 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:566:40
212.75:556:40
312.85:556:40
412.85:546:41
512.85:546:41
612.85:536:41
712.85:526:42
812.85:526:42
912.95:516:43
1012.95:516:43
1112.95:506:43
1212.95:506:44
1312.95:506:44
1412.95:496:45
1512.95:496:45
1613.05:486:45
1713.05:486:46
1813.05:486:46
1913.05:476:47
2013.05:476:47
2113.05:476:47
2213.05:466:48
2313.05:466:48
2413.15:466:49
2513.15:456:49
2613.15:456:50
2713.15:456:50
2813.15:456:50
2913.15:456:51
3013.15:456:51
3113.15:446:52

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.45 kWh/m².

For context, solar energy here swings from a low near 4.01 kWh/m² to a high of 6.31 kWh/m² in April across the year — May's 5.45 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Bright
26.0Bright
35.9Bright
45.9Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.5Bright
145.5Bright
155.5Bright
165.4Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.2Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for Mae Chan

In seasonPeak

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

Mae Chan's monsoon runs May–September, 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 Mae Chan?

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

2.9
Sightseeing
9th-best month of the year
4.6
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Mae Chan.

What to pack for Mae Chan in May

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

In May, Mae Chan sees daytime highs around 32°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Mae Chan in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Mae Chan peaks around July 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJul 17UV 13Dec 21UV 7
UV index (midday)Level
Jan7Very high
Feb9Very high
Mar9Very high
Apr10Very high
May11Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Mae Chan 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 Mae Chan is worst in April — around 156 µg/m³ PM2.5 (very unhealthy), about 12.0× the cleanest month (July, 13 µg/m³).

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

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateApr 11150 µg/m³Jul 2313 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb40Poor
Mar128Unhealthy
Apr156Very unhealthy
May37Poor
Jun15Moderate
Jul13Moderate
Aug13Moderate
Sep13Moderate
Oct14Moderate
Nov15Moderate
Dec19Moderate
Location & terrain

Where is Mae Chan?

Mae Chan sits at 20.1°N, 99.9°E, 416 m above sea level, in Thailand. The nearest listed city is Chiang Rai, 27 km away.

PhayaoDok Kham TaiMöng Yawng

Topography around Mae Chan

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

Within 3 km, the terrain around Mae Chan has significant variations in elevation — a maximum elevation change of 372 m around an average of 432 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 898 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,922 m.

The land around Mae Chan is covered by cropland (46%) and trees (34%) within 3 km, trees (65%) and cropland (24%) within 16 km, and trees (74%) within 80 km.

3 km
372 m
16 km
898 m
80 km
1,922 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Chiang Rai 27 km · Mae Sai 32 km · Ban Khoan 34 km · Tachilek 34 km · Ban Houakhoua 64 km · Phayao 106 km · Dok Kham Tai 110 km · Möng Yawng 126 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 Mae Chan (20.1468°, 99.8526°, elevation 416 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).