Phrae weather in May

In May, Phrae sees average daytime highs of 33°C and overnight lows near 25°C, with 215 mm of rain across 21.7 wet days and about 12.8 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 34°C in the first days to 32°C by the end. The sky is clear or mostly clear about 17% 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 13 hours by month's end. Set against the rest of the year, May is Phrae's 8th-clearest and 6th-windiest month. For the whole year in context, see Phrae's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
25°
11th coldest
Rainfall
215 mm
21.7 wet days
Daylight
12 h 54 min
5:50 AM – 6:41 PM
Cloud cover
73%
8th clearest
Wind
6 km/h
6th windiest
Solar energy
5.35 kWh/m²
Travel score
2.4
out of 10

Phrae is town in Phrae province, Thailand.

Air quality
Moderate
PM10 45 µg/m³ · 2019

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 34°C in the first days to 32°C by the end.

A typical May day in Phrae reaches about 33°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 2°C cooler than April and about 2°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13524
23424
33424
43424
53424
63424
73424
83424
93424
103425
113425
123325
133325
143325
153325
163325
173325
183325
193325
203325
213325
223325
233325
243325
253325
263325
273325
283325
293225
303225
313225

How May really feels in Phrae

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
22 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.

Phrae weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 16°182.3116.4
Feb32° / 17°91.411.45.0
Mar35° / 21°324.411.93.3
Apr35° / 24°7110.412.42.4
May33° / 25°21521.712.82.4
Jun32° / 25°24625.613.12.4
Jul31° / 24°30028.5132.6
Aug30° / 24°36729.512.62.5
Sep31° / 24°31227.212.12.6
Oct31° / 23°12816.211.63.9
Nov31° / 20°273.911.15.6
Dec29° / 17°151.810.96.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 70%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25545
35347
45149
54951
64852
74654
84456
94258
104060
113763
123565
133466
143268
153070
162872
172674
182575
192377
202377
212080
221981
231882
241783
251684
261585
271486
281387
291387
301189
311189

Chance of precipitation in May

Any precipitation

Phrae gets around 215 mm of rain over 21.7 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 70% and peaks near 80% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
155
256
357
458
559
660
761
863
964
1066
1167
1269
1370
1471
1572
1673
1774
1875
1975
2076
2176
2276
2377
2477
2577
2678
2778
2879
2979
3080
3180

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
1127810
2117712
3107713
497615
587517
677419
777221
867123
957025
1056827
1146729
1246531
1336433
1436235
1536136
1626038
1725840
1825741
1925642
2025444
2125345
2215346
2315247
2415049
2514851
2614752
2714554
2814356
2914158
3014059
3113861

Wind in May

Winds average 6 km/h in May.

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

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 36 min at the start of May to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:57 AM to 5:47 AM, and sunset from 6:36 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:576:36
212.75:576:36
312.75:566:37
412.75:566:37
512.75:556:37
612.75:546:38
712.75:546:38
812.75:536:38
912.85:536:39
1012.85:536:39
1112.85:526:39
1212.85:526:40
1312.85:516:40
1412.85:516:40
1512.85:516:41
1612.95:506:41
1712.95:506:42
1812.95:506:42
1912.95:496:42
2012.95:496:43
2112.95:496:43
2212.95:486:43
2312.95:486:44
2412.95:486:44
2512.95:486:45
2613.05:486:45
2713.05:476:45
2813.05:476:46
2913.05:476:46
3013.05:476:46
3113.05:476:47

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.35 kWh/m².

For context, solar energy here swings from a low near 3.87 kWh/m² to a high of 6.31 kWh/m² in April across the year — May's 5.35 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Bright
25.9Bright
35.9Bright
45.8Bright
55.8Bright
65.8Bright
75.7Bright
85.7Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.3Bright
165.3Bright
175.3Bright
185.2Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
304.9Bright
314.9Bright
Planning a trip in May

Hazard calendar for Phrae

In seasonPeak

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

Phrae'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 May a good time to visit Phrae?

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

2.4
Sightseeing
10th-best month of the year
4.4
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Phrae.

What to pack for Phrae in May

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

In May, Phrae sees daytime highs around 33°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Phrae in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Phrae peaks around June 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 highJun 19UV 13Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar9Very high
Apr10Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7Very high

Air quality in Phrae 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 Phrae is worst in March — around 61 µg/m³ PM2.5 (unhealthy), about 3.4× the cleanest month (June, 18 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorPoorModerateMar 1859 µg/m³Jun 2318 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb42Poor
Mar61Unhealthy
Apr48Poor
May26Moderate
Jun18Moderate
Jul18Moderate
Aug18Moderate
Sep18Moderate
Oct19Moderate
Nov20Moderate
Dec22Moderate
Location & terrain

Where is Phrae?

Phrae sits at 18.1°N, 100.1°E, 162 m above sea level, in Thailand. The nearest listed city is Den Chai, 20 km away.

NanSawankhalokDok Kham TaiThoen

Topography around Phrae

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

Within 3 km, the terrain around Phrae has only modest variations in elevation — a maximum elevation change of 27 m around an average of 158 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 873 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,607 m.

The land around Phrae is covered by trees (38%), cropland (31%) and artificial surfaces (28%) within 3 km, trees (62%) and cropland (30%) within 16 km, and trees (81%) within 80 km.

3 km
27 m
16 km
873 m
80 km
1,607 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Den Chai 20 km · Uttaradit 58 km · Lampang 70 km · Si Satchanalai 81 km · Nan 98 km · Sawankhalok 98 km · Dok Kham Tai 114 km · Thoen 114 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 Phrae (18.1459°, 100.141°, elevation 162 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).