Pai weather in April

In April, Pai sees average daytime highs of 33°C and overnight lows near 20°C, with 60 mm of rain across 7.7 wet days and about 12.4 hours of daylight. It is the 1st-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 59% of the time in April, and the air most often feels humid.

Daylight stretches from about 12 h 12 min at the start of April to 12 h 42 min by month's end. Set against the rest of the year, April is Pai's 5th-clearest and 2nd-windiest month. For the whole year in context, see Pai's year-round climate.

Daytime high
33°
1st warmest
Overnight low
20°
7th coldest
Rainfall
60 mm
7.7 wet days
Daylight
12 h 24 min
6:13 AM – 6:40 PM
Cloud cover
40%
5th clearest
Wind
5 km/h
2nd windiest
Solar energy
6.38 kWh/m²
Travel score
3.7
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical April day in Pai reaches about 33°C in the afternoon and slips back to 20°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, April runs about 1°C warmer than March and about 2°C warmer than May.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13318
23318
33318
43319
53319
63319
73319
83319
93319
103319
113319
123420
133420
143420
153320
163320
173320
183320
193320
203320
213320
223320
233320
243321
253321
263321
273321
283321
293221
303221

How April really feels in Pai

Once humidity and wind are folded in, April averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Pai weather by month

How April compares with the rest of the year at a glance. April is the 1st-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 12°162.4118.2
Feb30° / 13°71.411.36.6
Mar32° / 16°213.311.94.8
Apr33° / 20°607.712.43.7
May31° / 21°19320.712.93.3
Jun29° / 22°22125.413.13.1
Jul29° / 22°28727.713.13.2
Aug28° / 21°3212912.73.1
Sep29° / 21°24825.612.13.4
Oct28° / 20°11617.611.64.9
Nov27° / 17°376.611.17.2
Dec26° / 14°163.210.98.2

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 25%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28317
38317
48218
58218
68218
78020
88020
97921
107822
117822
127723
137723
147624
157624
167525
177525
187426
197426
207426
217327
227327
237129
247129
257030
266931
276832
286634
296535
306337

Chance of precipitation in April

Any precipitation

Pai gets around 60 mm of rain over 7.7 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 26% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
114
214
314
415
515
615
716
817
918
1019
1120
1220
1321
1422
1523
1624
1726
1827
1928
2030
2131
2233
2335
2436
2538
2640
2742
2844
2945
3047

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the humid band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 38% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1133935120
2123936130
3113837140
4103738150
593638160
683539180
783439191
873240211
963140221
1062941241
1152741251
1242642271
1342442291
1432242312
1522142322
1621942342
1721842362
1811741382
1911640403
2011539423
2111438444
2211337464
2311235485
2401134505
2501032526
260930556
270928567
280827578
290725599
3006236110

Wind in April

Winds average 5 km/h in April.

Across April, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in April

DaylightNight

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

Days grow by about 30 minutes over April. Sunrise moves from 6:26 AM to 6:03 AM, and sunset from 6:36 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:266:36
212.26:256:36
312.26:246:36
412.26:236:37
512.26:226:37
612.36:226:37
712.36:216:37
812.36:206:38
912.36:196:38
1012.36:186:38
1112.46:176:38
1212.46:166:39
1312.46:166:39
1412.46:156:39
1512.46:146:39
1612.46:136:40
1712.56:126:40
1812.56:126:40
1912.56:116:41
2012.56:106:41
2112.56:096:41
2212.56:096:41
2312.66:086:42
2412.66:076:42
2512.66:076:42
2612.66:066:43
2712.66:056:43
2812.66:046:43
2912.76:046:44
3012.76:036:44

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.38 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.74 kWh/m² to a high of 6.38 kWh/m² in April across the year — April's 6.38 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.2Intense
236.2Intense
246.2Intense
256.1Intense
266.1Intense
276.1Intense
286.0Intense
296.0Bright
305.9Bright
Planning a trip in April

Hazard calendar for Pai

In seasonPeak

None of Pai's seasonal hazards are active in April. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Pai'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 April a good time to visit Pai?

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

3.7
Sightseeing
7th-best month of the year
6.7
Beach & pool
6th-best month of the year

April is a weaker month for outdoor sightseeing in Pai. The water and warmth also suit a beach or pool day.

What to pack for Pai in April

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

In April, Pai sees daytime highs around 33°C and nights near 20°C. Pack light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Pai in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Pai peaks around August 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 12UV 14Dec 22UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar10Very high
Apr10Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec7Very high

Air quality in Pai in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Pai is worst in March — around 90 µg/m³ PM2.5 (unhealthy), about 9.6× the cleanest month (October, 9 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateGoodMar 1985 µg/m³Oct 249 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb35Moderate
Mar90Unhealthy
Apr57Unhealthy
May20Moderate
Jun11Good
Jul10Good
Aug10Good
Sep10Good
Oct9Good
Nov9Good
Dec11Good
Location & terrain

Where is Pai?

Pai sits at 19.4°N, 98.4°E, 0 m above sea level, in Thailand. The nearest listed city is Chiang Mai, 86 km away.

San Pa TongSan KamphaengLamphunPa SangLoikawPhayao

Topography around Pai

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

Within 3 km, the terrain around Pai has significant variations in elevation — a maximum elevation change of 444 m around an average of 563 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,543 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,997 m.

The land around Pai is covered by trees (48%), grassland (23%) and cropland (21%) within 3 km, trees (86%) within 16 km, and trees (91%) within 80 km.

3 km
444 m
16 km
1,543 m
80 km
1,997 m
treesgrasslandcroplandartificial surfaces
April weather nearby: Chiang Mai 86 km · Hang Dong 90 km · San Pa Tong 95 km · San Kamphaeng 99 km · Lamphun 105 km · Pa Sang 107 km · Loikaw 134 km · Phayao 152 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 Pai (19.3617°, 98.4397°, elevation 0 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).