Sai Mai weather in May

In May, Sai Mai sees average daytime highs of 34°C and overnight lows near 27°C, with 185 mm of rain across 24.2 wet days and about 12.6 hours of daylight. It is the 3rd-warmest and 4th-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 8% of the time in May, and the air most often feels miserable.

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 Sai Mai's 8th-clearest and 6th-windiest month. For the whole year in context, see Sai Mai's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
27°
12th coldest
Rainfall
185 mm
24.2 wet days
Daylight
12 h 36 min
5:54 AM – 6:33 PM
Cloud cover
80%
8th clearest
Wind
8 km/h
6th windiest
Solar energy
5.48 kWh/m²
Travel score
1.8
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 Sai Mai reaches about 34°C in the afternoon and slips back to 27°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 37°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°C warmer than June.

25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13527
23527
33527
43527
53527
63527
73527
83527
93527
103527
113527
123527
133427
143427
153427
163427
173427
183427
193427
203427
213427
223427
233427
243427
253427
263427
273427
283427
293427
303427
313427

How May really feels in Sai Mai

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.

Sai Mai 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
Jan32° / 21°153.511.34.9
Feb33° / 23°163.711.54.1
Mar34° / 25°568.511.93.0
Apr35° / 27°9114.712.32.1
May34° / 27°18524.212.61.8
Jun34° / 27°17924.812.82.0
Jul33° / 26°18525.912.72.1
Aug33° / 26°20426.212.52.1
Sep32° / 26°28426.912.12.2
Oct32° / 25°16719.611.73.0
Nov32° / 24°335.811.44.3
Dec32° / 22°9211.25.1

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 12% of May, with mostly cloudy or overcast conditions the remaining 80%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
23961
33664
43664
53565
63367
73070
82971
92773
102674
112377
122278
132179
142080
151981
161783
171783
181684
191585
201387
211288
221288
231189
241189
251189
261090
271090
281090
29991
30991
31991

Chance of precipitation in May

Any precipitation

Sai Mai gets around 185 mm of rain over 24.2 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 78% and peaks near 84% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
168
269
370
471
572
672
773
874
975
1076
1177
1278
1378
1479
1580
1680
1780
1881
1981
2081
2181
2281
2381
2482
2582
2682
2782
2883
2983
3083
3184

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1991
2991
3892
4892
5793
6793
7694
8694
9694
10694
11694
12595
13595
14595
15496
16496
17496
18496
19496
20496
21496
22496
23496
24496
25496
26496
27496
28595
29595
30595
31595

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 8 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
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 6:00 AM to 5:52 AM, and sunset from 6:29 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:006:29
212.55:596:30
312.55:596:30
412.55:596:30
512.55:586:30
612.55:586:30
712.65:576:31
812.65:576:31
912.65:576:31
1012.65:566:31
1112.65:566:32
1212.65:566:32
1312.65:556:32
1412.65:556:32
1512.65:556:33
1612.65:546:33
1712.75:546:33
1812.75:546:34
1912.75:546:34
2012.75:536:34
2112.75:536:34
2212.75:536:35
2312.75:536:35
2412.75:536:35
2512.75:536:36
2612.75:536:36
2712.75:526:36
2812.75:526:37
2912.75:526:37
3012.75:526:37
3112.85:526:37

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.48 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 6.09 kWh/m² in April across the year — May's 5.48 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.6Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in May

Hazard calendar for Sai Mai

In seasonPeak

In May, Sai Mai sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Sai Mai sits in the Pacific typhoon belt; the season peaks July–October.

Sai Mai's rainy season runs May–October, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Sai Mai?

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

1.8
Sightseeing
12th-best month of the year
3.8
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Sai Mai.

What to pack for Sai Mai in May

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

In May, Sai Mai sees daytime highs around 34°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

Sea temperature near Sai Mai in May

The nearest coast averages about 31°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 61 km away) is warmest in May at about 31°C and coldest in January near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Sai Mai in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sai Mai peaks around August 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeExtremeVery highAug 14UV 13Dec 12UV 9
UV index (midday)Level
Jan9Very high
Feb9Very high
Mar12Extreme
Apr11Extreme
May10Very high
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov9Very high
Dec9Very high

Air quality in Sai Mai 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 Sai Mai is worst in January — around 83 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (July, 43 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyJan 2382 µg/m³Jul 2443 µg/m³
PM2.5 (µg/m³)Level
Jan83Unhealthy
Feb81Unhealthy
Mar70Unhealthy
Apr64Unhealthy
May54Poor
Jun44Poor
Jul43Poor
Aug43Poor
Sep54Poor
Oct66Unhealthy
Nov67Unhealthy
Dec66Unhealthy
Location & terrain

Where is Sai Mai?

Sai Mai sits at 13.9°N, 100.6°E, 4 m above sea level, in Thailand. The nearest listed city is Anusawari, 4.0 km away.

Topography around Sai Mai

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

Within 3 km, the terrain around Sai Mai has only modest variations in elevation — a maximum elevation change of 18 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 56 m; within 80 km, large variations in elevation — a maximum elevation change of 1,011 m.

The land around Sai Mai is covered by artificial surfaces (65%) and trees (22%) within 3 km, artificial surfaces (52%) and trees (22%) within 16 km, and cropland (39%) and trees (20%) within 80 km.

3 km
18 m
16 km
56 m
80 km
1,011 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Anusawari 4.0 km · Tha Raeng 6.0 km · Lak Si 8.0 km · Chorakhe Bua 10 km · Khan Na Yao 11 km · Khlong Sam Wa 11 km · Sena Nikhom 12 km · Lat Yao 12 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 Sai Mai (13.9207°, 100.6455°, elevation 4 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).