Surin weather in May

In May, Surin sees average daytime highs of 35°C and overnight lows near 26°C, with 151 mm of rain across 20.5 wet days and about 12.7 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 8% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of May to 12 h 48 min by month's end. Set against the rest of the year, May is Surin's 8th-clearest and 10th-windiest month. For the whole year in context, see Surin's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
26°
12th coldest
Rainfall
151 mm
20.5 wet days
Daylight
12 h 42 min
5:42 AM – 6:23 PM
Cloud cover
79%
8th clearest
Wind
8 km/h
10th windiest
Solar energy
5.65 kWh/m²
Travel score
1.9
out of 10

Surin is town in Surin province, Thailand.

Density
4,098/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical May day in Surin reaches about 35°C in the afternoon and slips back to 26°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 38°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)
13626
23626
33626
43526
53526
63526
73526
83526
93526
103526
113526
123526
133526
143526
153526
163526
173526
183526
193426
203426
213426
223426
233426
243426
253426
263426
273426
283426
293426
303426
313426

How May really feels in Surin

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.

Surin weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 19°61.611.25.6
Feb33° / 21°112.311.54.2
Mar35° / 24°346.111.92.6
Apr36° / 26°7111.612.31.9
May35° / 26°15120.512.71.9
Jun34° / 26°13920.312.92.1
Jul33° / 26°17322.712.82.3
Aug32° / 25°21224.312.52.4
Sep32° / 25°2632512.12.6
Oct31° / 24°12915.311.73.8
Nov31° / 22°334.711.35.1
Dec30° / 19°71.811.16.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% 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 79%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34159
44060
53862
63565
73367
83268
93070
102872
112674
122476
132278
142080
151882
161783
171684
181585
191486
201387
211288
221288
231288
241189
251189
261189
271189
281090
291090
301090
311090

Chance of precipitation in May

Any precipitation

Surin gets around 151 mm of rain over 20.5 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 66% and peaks near 69% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
157
258
359
460
561
661
762
863
964
1065
1166
1266
1367
1468
1568
1669
1769
1869
1969
2069
2169
2269
2369
2468
2568
2668
2768
2867
2967
3067
3166

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1076429
2076231
3066133
4065935
5055837
6055639
7045640
8045442
9035344
10035245
11125146
12125048
13124949
14114949
15114850
16114751
17114751
18114652
19104653
20104554
21104554
22004456
23004456
24004456
25004456
26004357
27004357
28004357
29004357
30004357
31004357

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 30 min at the start of May to 12 h 48 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 5:47 AM to 5:39 AM, and sunset from 6:19 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:476:19
212.55:476:19
312.55:466:19
412.65:466:20
512.65:466:20
612.65:456:20
712.65:456:20
812.65:446:21
912.65:446:21
1012.65:446:21
1112.65:436:22
1212.65:436:22
1312.75:436:22
1412.75:426:22
1512.75:426:23
1612.75:426:23
1712.75:416:23
1812.75:416:24
1912.75:416:24
2012.75:416:24
2112.75:406:24
2212.75:406:25
2312.85:406:25
2412.85:406:25
2512.85:406:26
2612.85:406:26
2712.85:396:26
2812.85:396:27
2912.85:396:27
3012.85:396:27
3112.85:396:28

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.65 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.13 kWh/m² in April across the year — May's 5.65 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Hazard calendar for Surin

In seasonPeak

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

Surin'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 Surin?

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

1.9
Sightseeing
11th-best month of the year
4.1
Beach & pool
10th-best month of the year

May is a weaker month for outdoor sightseeing in Surin.

What to pack for Surin in May

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

In May, Surin sees daytime highs around 35°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Surin 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 Surin peaks around August 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 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 13UV 13Nov 21UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr11Extreme
May11Extreme
Jun12Extreme
Jul13Extreme
Aug14Extreme
Sep11Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Surin 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 Surin is worst in March — around 54 µg/m³ PM2.5 (poor), about 2.5× the cleanest month (June, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 1452 µg/m³Jun 2121 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb47Poor
Mar54Poor
Apr40Poor
May28Moderate
Jun21Moderate
Jul23Moderate
Aug23Moderate
Sep27Moderate
Oct30Moderate
Nov25Moderate
Dec22Moderate
Location & terrain

Where is Surin?

Surin sits at 14.9°N, 103.5°E, 150 m above sea level, in Thailand. The nearest listed city is Buri Ram, 44 km away.

Ban Huai ThalaengSi Sa KetAnlong Veaeng

Topography around Surin

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

Within 3 km, the terrain around Surin has only modest variations in elevation — a maximum elevation change of 31 m around an average of 148 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 53 m; within 80 km, significant variations in elevation — a maximum elevation change of 501 m.

The land around Surin is covered by trees (37%) and artificial surfaces (35%) within 3 km, cropland (68%) and trees (20%) within 16 km, and cropland (76%) within 80 km.

3 km
31 m
16 km
53 m
80 km
501 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Buri Ram 44 km · Prakhon Chai 50 km · Samraong 78 km · Nang Rong 80 km · Kaset Wisai 87 km · Ban Huai Thalaeng 91 km · Si Sa Ket 93 km · Anlong Veaeng 96 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 Surin (14.8818°, 103.4936°, elevation 150 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).