Bangkok in May
In May, Bangkok has a daily high of 34.7 °C (94.5 °F) and a daily low of 26.7 °C (80.1 °F), as 1991-2020 model estimates; figures in brackets are converted. The daily high is a model estimate, adjusted against station records. There is no data for rain: Not published: the model failed our station test in tropical cities.
Last updated : back, with ERA5-Land model estimates.
Best time to visit Bangkok: May misses our rule: days are 6.7 °C over our 28 °C (model estimates). Expect days that grow by 16 min.
What May is like in Bangkok
- In Rot Fai Park, Queen's flower trees still hold purple blossoms in May. Thais call the tree inthanin. Its flowers begin to open in March. Source: TAT Newsroom (Tourism Authority of Thailand), checked .
- After the Royal Ploughing Ceremony at Sanam Luang, usually in May, farmers may pick up the seeds. They sow them in their own fields for good luck. Source: Thailand Foundation, checked .
- In April and May, migrant birds pass through Lumphini Park. Among them are flycatchers and leaf warblers. Source: Thai Birding (Nick Upton), checked .
Key figures
Weather in May, 1991-2020 model estimates
- Daily high
- 34.7 °C (94.5 °F)
- Daily low
- 26.7 °C (80.1 °F)
- Rain
- no data
- Sunshine
- no data
Model estimate 1991-2020, not a weather station: ERA5-Land model estimates (Copernicus), computed by City by Month for the grid cell nearest the city. Daily high: model estimate, adjusted against station records. Licence: CC BY 4.0. Checked . How we make and test model estimates
Model estimate for the ERA5-Land grid cell at 13.7° N, 100.5° E, 6 km from the city centre point.
How we define and convert these figures
Notes. Rain: Not published: the model failed our station test in tropical cities. Sunshine: Not in our ERA5-Land estimates.
Daylight on 15 May 2026
- Sunrise
- 05:52 local time
- Sunset
- 18:37 local time
- Day length
- 12 h 46 min
Day length 1-31 May: 12 h 37 min to 12 h 53 min, +16 min.
Source: NOAA Solar Calculator equations, checked .
Month by month
Each month: daily high in °C, 1991-2020 model estimates. Rain: no data.
ERA5-Land model estimates 1991-2020, as above, checked .
This month against the year
| Measure | May | Rank |
|---|---|---|
| Daily high | 34.7 °C | 2nd warmest |
| Daily low | 26.7 °C | 2nd warmest |
| Rain | no data | no data |
| Sunshine | no data | no data |
| Day length | 12 h 46 min | 3rd longest |
Equal values share a rank. How we rank months
ERA5-Land model estimates 1991-2020, as above, checked .
Day length: NOAA solar equations, checked .
Public holidays this month
| Date | Holiday |
|---|---|
| Monday | Coronation Day |
| Wednesday | Royal Ploughing Ceremony (Government offices only; banks stay open) |
| Sunday | Visakha Bucha (A Sunday. The Monday after is the day off) |
Typed from the official list and re-checked, .
May 2027: no data. No government list for 2027 yet.
English names are from the holidays library where the official list gives none. How we check holidays
Source: Official public holiday list (soc.go.th), checked ; holidays Python library, checked . Library: holidays 0.105.
Same month in 8 model-estimate cities
Bangkok is warmer than 6 of our 8 model-estimate cities in May by mean daily high. How we rank cities
Closest high and low in May: Mumbai (0.5 °C apart), Delhi (3.9), Lisbon (12.1).
| City | Gap from Bangkok, °C | High, °C | Low, °C | Rain, mm | Sunshine, hours |
|---|---|---|---|---|---|
| Bangkok (this page) | — | 34.7 | 26.7 | no data | no data |
| Mumbai (closest) | 0.5 | 34.0 | 26.5 | no data | no data |
| Delhi (closest) | 3.9 | 41.2 | 25.4 | no data | no data |
| Lisbon (closest) | 12.1 | 22.5 | 14.7 | 45.1 | no data |
| Istanbul | 13.3 | 21.6 | 13.3 | 37.0 | no data |
| Porto | 13.6 | 21.8 | 12.4 | 98.1 | no data |
| Sydney | 14.0 | 20.7 | 12.7 | 72.7 | no data |
| Melbourne | 17.4 | 17.6 | 9.0 | 50.5 | no data |
Sources (1991-2020): ERA5-Land model estimates, checked . Each city's page names its grid cell. All sources in full on Methodology.
Sources
- Attribution: Copernicus Climate Change Service (2025): ERA5 Land hourly time-series data from 1950 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/ee82e357. Accessed on the check date shown. Generated using or contains modified Copernicus Climate Change Service information 2025. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains. Licence: CC BY 4.0. Checked .
- NOAA Solar Calculator equations, computed locally, NOAA Global Monitoring Laboratory (method); City by Month (computation). Attribution: Computed with the NOAA Solar Calculator method (no NOAA endorsement implied). Licence: Method, not data. Checked .
- holidays Python library, run locally. Attribution: holidays library, Vacanza team. Licence: MIT. Checked .
Official sources
- Official public holiday list (soc.go.th). Checked .
Cite this page: City by Month. "Bangkok in May: weather, daylight, holidays". https://citybymonth.com/cities/thailand/bangkok/may/. Last updated 8 November 2026.