Erawan weather in May

In May, Erawan sees average daytime highs of 34°C and overnight lows near 25°C, with 167 mm of rain across 21.3 wet days and about 12.8 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 11% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of May to 12 h 54 min by month's end. Set against the rest of the year, May is Erawan's 8th-clearest and 10th-windiest month. For the whole year in context, see Erawan's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
25°
11th coldest
Rainfall
167 mm
21.3 wet days
Daylight
12 h 48 min
5:44 AM – 6:33 PM
Cloud cover
78%
8th clearest
Wind
5 km/h
10th windiest
Solar energy
5.33 kWh/m²
Travel score
2.3
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical May day in Erawan reaches about 34°C in the afternoon and slips back to 25°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 37°C. Set against its neighbours, May runs about 1°C cooler than April and on par with June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13525
23525
33425
43425
53425
63425
73425
83425
93425
103425
113425
123425
133425
143425
153425
163425
173325
183325
193325
203325
213325
223325
233325
243325
253325
263325
273325
283325
293325
303325
313325

How May really feels in Erawan

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
31 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.

Erawan weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 17°81.611.17.0
Feb31° / 18°112.111.45.4
Mar34° / 22°366.711.93.5
Apr35° / 24°6611.412.42.5
May34° / 25°16721.312.82.3
Jun33° / 25°14519.1132.5
Jul32° / 25°16620.312.92.7
Aug31° / 25°23323.512.62.7
Sep31° / 24°24023.812.12.9
Oct30° / 23°11513.511.64.5
Nov29° / 20°223.211.26.4
Dec28° / 17°81.2117.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 76%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24456
34357
44357
54159
63961
73763
83664
93466
103268
113070
122872
132773
142575
152278
162179
172080
181882
191783
201684
211486
221387
231288
241288
251189
261189
271189
281090
29991
30991
31892

Chance of precipitation in May

Any precipitation

Erawan gets around 167 mm of rain over 21.3 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 68% and peaks near 74% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
158
259
360
461
562
662
763
864
965
1066
1167
1268
1368
1469
1569
1670
1770
1871
1971
2072
2172
2272
2373
2473
2573
2673
2773
2874
2974
3074
3174

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 68% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
111836
210837
39838
49829
588111
678112
777914
867915
957817
1057619
1147620
1247422
1347224
1437225
1537027
1636928
1726830
1826731
1926533
2026434
2116336
2216237
2316039
2415940
2515742
2615643
2705644
2805446
2905347
3005347
3105248

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 36 min at the start of May to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over May. Sunrise moves from 5:51 AM to 5:41 AM, and sunset from 6:28 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:516:28
212.65:506:28
312.65:506:28
412.75:496:29
512.75:496:29
612.75:486:29
712.75:486:30
812.75:476:30
912.75:476:30
1012.75:466:31
1112.75:466:31
1212.85:466:31
1312.85:456:32
1412.85:456:32
1512.85:456:32
1612.85:446:33
1712.85:446:33
1812.85:446:33
1912.85:436:34
2012.95:436:34
2112.95:436:34
2212.95:436:35
2312.95:426:35
2412.95:426:36
2512.95:426:36
2612.95:426:36
2712.95:426:37
2812.95:416:37
2912.95:416:37
3012.95:416:38
3112.95:416:38

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.33 kWh/m².

For context, solar energy here swings from a low near 4.23 kWh/m² to a high of 5.99 kWh/m² in April across the year — May's 5.33 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.7Bright
45.7Bright
55.7Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.0Bright
Planning a trip in May

Hazard calendar for Erawan

In seasonPeak

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

Erawan'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 Erawan?

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

2.3
Sightseeing
12th-best month of the year
4.4
Beach & pool
10th-best month of the year

May is a weaker month for outdoor sightseeing in Erawan.

What to pack for Erawan in May

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

In May, Erawan sees daytime highs around 34°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Erawan 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 Erawan peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 11UV 13Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr11Extreme
May11Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Erawan 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 Erawan is worst in March — around 63 µg/m³ PM2.5 (unhealthy), about 3.1× the cleanest month (July, 20 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModerateMar 1861 µg/m³Jul 1320 µg/m³
PM2.5 (µg/m³)Level
Jan31Moderate
Feb45Poor
Mar63Unhealthy
Apr50Poor
May28Moderate
Jun20Moderate
Jul20Moderate
Aug21Moderate
Sep23Moderate
Oct25Moderate
Nov24Moderate
Dec25Moderate
Location & terrain

Where is Erawan?

Erawan sits at 17.3°N, 102.0°E, 358 m above sea level, in Thailand. The nearest listed city is Wang Saphung, 20 km away.

Topography around Erawan

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

Within 3 km, the terrain around Erawan has only modest variations in elevation — a maximum elevation change of 147 m around an average of 358 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 410 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,433 m.

The land around Erawan is covered by trees (51%) and cropland (36%) within 3 km, cropland (52%) and trees (41%) within 16 km, and trees (59%) and cropland (35%) within 80 km.

3 km
147 m
16 km
410 m
80 km
1,433 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Wang Saphung 20 km · Na Klang 25 km · Loei 32 km · Phu Kradueng 47 km · Nong Bua Lamphu 53 km · Nam Som 58 km · Kut Chap 67 km · Chum Phae 86 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 Erawan (17.3018°, 101.9538°, elevation 358 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).