Phak Hai weather in May

In May, Phak Hai sees average daytime highs of 36°C and overnight lows near 27°C, with 154 mm of rain across 21.1 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 36°C through the month. The sky is clear or mostly clear about 9% 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 Phak Hai's 8th-clearest and 8th-windiest month. For the whole year in context, see Phak Hai's year-round climate.

Daytime high
36°
3rd warmest
Overnight low
27°
12th coldest
Rainfall
154 mm
21.1 wet days
Daylight
12 h 42 min
5:55 AM – 6:35 PM
Cloud cover
78%
8th clearest
Wind
9 km/h
8th windiest
Solar energy
5.65 kWh/m²
Travel score
1.4
out of 10

Phak Hai is town in Phak Hai district, Phra Nakhon Si Ayutthaya province, Thailand.

Founded
1956

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 36°C through the month.

A typical May day in Phak Hai reaches about 36°C in the afternoon and slips back to 27°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 39°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°C warmer than June.

25°30°35°40°45°151015202531
Avg high (°C)Avg low (°C)
13727
23727
33727
43727
53727
63727
73727
83627
93627
103627
113627
123627
133627
143627
153627
163627
173627
183627
193627
203627
213627
223627
233627
243627
253627
263627
273627
283627
293627
303627
313627

How May really feels in Phak Hai

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.

Phak Hai 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
Jan33° / 22°132.811.24.2
Feb35° / 24°143.211.53.2
Mar36° / 26°437.511.92.1
Apr37° / 27°8413.712.31.3
May36° / 27°15421.112.71.4
Jun35° / 27°12921.612.81.6
Jul34° / 27°13422.612.81.9
Aug34° / 26°15722.912.51.9
Sep33° / 26°25325.212.12.0
Oct33° / 25°16819.311.72.8
Nov33° / 24°355.911.33.8
Dec32° / 22°101.711.24.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% 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 79%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34060
43862
53664
63466
73268
83169
92872
102674
112575
122377
132179
142080
151882
161783
171684
181585
191585
201486
211387
221387
231387
241288
251288
261288
271189
281189
291090
301090
311090

Chance of precipitation in May

Any precipitation

Phak Hai gets around 154 mm of rain over 21.1 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 69% 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 (%)
156
257
358
459
560
661
762
863
965
1066
1167
1269
1370
1471
1572
1672
1773
1873
1973
2073
2173
2273
2373
2473
2573
2673
2773
2873
2973
3074
3174

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 69% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
133562
233463
333364
433265
533265
633166
723167
823068
923068
1022969
1122969
1222969
1312970
1412970
1512970
1612970
1702971
1803070
1903070
2003070
2103070
2203070
2303070
2403070
2503070
2603070
2703070
2803070
2902971
3002971
3102971

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
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 6:00 AM to 5:52 AM, and sunset from 6:31 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:006:31
212.56:006:31
312.55:596:31
412.55:596:32
512.65:596:32
612.65:586:32
712.65:586:32
812.65:576:33
912.65:576:33
1012.65:576:33
1112.65:566:33
1212.65:566:34
1312.65:566:34
1412.65:556:34
1512.75:556:35
1612.75:556:35
1712.75:546:35
1812.75:546:35
1912.75:546:36
2012.75:546:36
2112.75:546:36
2212.75:536:37
2312.75:536:37
2412.75:536:37
2512.75:536:38
2612.85:536:38
2712.85:536:38
2812.85:536:39
2912.85:526:39
3012.85:526:39
3112.85:526:39

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 4.58 kWh/m² to a high of 6.23 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
26.0Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
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 Phak Hai

In seasonPeak

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

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

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

Is May a good time to visit Phak Hai?

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

1.4
Sightseeing
11th-best month of the year
3.4
Beach & pool
12th-best month of the year

May is a weaker month for outdoor sightseeing in Phak Hai.

What to pack for Phak Hai in May

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

In May, Phak Hai sees daytime highs around 36°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Phak Hai 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 Phak Hai peaks around August 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 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 15UV 13Nov 23UV 8
UV index (midday)Level
Jan9Very high
Feb9Very high
Mar12Extreme
Apr11Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec8Very high

Air quality in Phak Hai 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 Phak Hai 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 Phak Hai?

Phak Hai sits at 14.5°N, 100.4°E, 11 m above sea level, in Thailand. The nearest listed city is Bang Ban, 15 km away.

Topography around Phak Hai

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

Within 3 km, the terrain around Phak Hai has only modest variations in elevation — a maximum elevation change of 11 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 27 m; within 80 km, large variations in elevation — a maximum elevation change of 642 m.

The land around Phak Hai is covered by cropland (70%) within 3 km, cropland (69%) within 16 km, and cropland (66%) within 80 km.

3 km
11 m
16 km
27 m
80 km
642 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Bang Ban 15 km · Wiset Chaichan 16 km · Ayutthaya 25 km · Nakhon Luang 26 km · Suphan Buri 27 km · Bang Pa-in 34 km · Tha Ruea 40 km · Ban Mo 42 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 Phak Hai (14.4568°, 100.37°, elevation 11 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).