yearsofweather

Bangkok in May:
seriously hot,

Bangkok, Thailand · Records from 2006 to 2025. Not a forecast.

Mean high35°Hottest day 40.7° (2010)
Mean low27°Coldest night 22.5° (2022)
Rain days12 days4-21 by year
Rainfall242mmDaylight 12.6 → 12.9 h
Bangkok's 12 months iBest: December to February
Trip types Sightseeing on foot Poorhot, frequent rain and muggy
Humidity75%31 muggy days
Clear days1 day21 overcast days
Mean wind9 km/hRarely windy
Sunrise / sunset (15th)05:51 / 18:37Daylight 12.6 → 12.9 h

Bangkok in May

The rainy season starts in the middle of the heat. Humidity jumps and showers become more frequent. Keep a folding umbrella in your bag, and drink water often, since the midday heat is close to April's.

Days averaged 35°C and nights 27°C. Midday was for air conditioning, a cold drink or a long lunch out of the sun. There were 12 rain days on average, roughly one day in three. The average is 12, but individual years ran from 4 (2015) to 21 (2017).

April averaged 6 rain days; May jumped to 12. The wet season tended to start here. Highs topped 30°C on 31 days of the month on average. Mixing in indoor stops at midday made sense. Wet days did not mess around: about 20 mm each, the kind of rain that drives you into a doorway.

Date by date i

‹ April May 2027 June ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1rain on 40% of days35° 27°
2-8rain on 26% of days36° 27°
9-15rain on 43% of days35° 27°
16-22rain on 42% of days35° 27°
23-29rain on 43% of days35° 27°
30-31rain on 45% of days34° 27°

0-5/206-8/209-11/2012-20/20

May 1rain on 40% of days35° 27°
2-8rain on 26% of days36° 27°
9-15rain on 43% of days35° 27°
16-22rain on 42% of days35° 27°
23-29rain on 43% of days35° 27°
30-31rain on 45% of days34° 27°
Tap another date to change

2006none
200712mm
200851mm
200947mm
20109mm
201111mm
20122mm
201317mm
20142mm
2015none
2016none
201726mm
2018none
201927mm
2020none
2021none
2022none
20231mm
2024none
202587mm
Holidays in May (2027)
  • May 1 to May 4 Labour Day and Coronation Day break
  • May 3 Substitute for National Labour Day (1 May)
  • May 20 Visakha Bucha Day
  • May 31 Memorial Day

1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
2 d 16 d
2007
6 d 16 d
2008
3 d 17 d
2009
0 d 15 d
2010
2 d 11 d
2011
2 d 14 d
2012
2 d 11 d
2013
0 d 8 d
2014
2 d 10 d
2015
0 d 4 d
2016
0 d 6 d
2017
3 d 21 d
2018
3 d 12 d
2019
1 d 9 d
2020
0 d 5 d
2021
3 d 10 d
2022
3 d 14 d
2023
0 d 7 d
2024
1 d 15 d
2025
3 d 20 d
Years with rain
Tap a date to start, tap another to end. Each cell is that date in one year.
'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
of 20
8
5
6
5
2
7
8
3
3
9
10
12
10
8
8
10
12
7
10
6
6
8
8
8
9
8
7
11
9
10
8
Rain days on trip
26302220200331033013

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2015 had 4 rain days, 2017 had 21.

Bangkok through the year

MonthHighLowRain daysRainfall
JanuaryGood 33°23°2 days26mm
FebruaryGood 34°25°3 days40mm
March 35°27°3 days50mm
April 36°27°6 days102mm
May 35°27°12 days242mm
June 34°26°13 days191mm
July 34°26°15 days204mm
August 33°26°15 days218mm
September 33°25°18 days385mm
October 33°25°14 days294mm
November 33°25°5 days59mm
DecemberGood 32°23°1 day15mm

Common questions

Does it rain a lot in Bangkok in May?

Over the past 20 years May averaged 12 rain days (1 mm or more) out of 31. Individual years ran from 4 in the driest to 21 in the wettest.

What should I wear in Bangkok in May?

Days averaged 35°C and nights 27°C. Pack an umbrella, sandals that can get wet, T-shirts, sunscreen plus a hat, and insect repellent.

Is May a good time to visit Bangkok?

On warmth and rain days alone, Bangkok's easiest months were December to February. May ranked 10 of 12.

Is Bangkok humid in May?

Mean relative humidity was 75%, with about 31 muggy days (dew point of 20°C or more) in the month.