Climate averages 1991–2020
Ratchaburi weather
in May.
A hot, wet month: the 3rd warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Ratchaburi: daytime highs average 33.9°C and nights cool to about 26.0°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 127 mm of rain on roughly 22 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 45 min on an average May day.
The nearest other city in this atlas is Ban I Chang (21 km away). In May its highs average 34.2°C, about as warm as Ratchaburi, with 141 mm of rain.
Among the 46 cities listed in Thailand, Ratchaburi ranks 4th of 46 for the warmest May highs and 8th of 46 for the driest May (rainfall, lowest first). The mean May high of those 46 cities is 32.7°C; Ratchaburi is 1.3°C warmer than that mean.
From May to June, average highs fall by 1.2°C to 32.7°C, and monthly rainfall falls from 127 mm to 114 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ratchaburi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.9°C21.2°C | 21.2°C | 12 | 2.2 | 11.411 h |
| February | 32.9°C22.4°C | 22.4°C | 10 | 2.4 | 11.712 h |
| March | 34.5°C24.2°C | 24.2°C | 37 | 6.3 | 12.012 h |
| April | 35.7°C25.8°C | 25.8°C | 68 | 11.1 | 12.412 h |
| May, selected | 33.9°C26.0°C | 26.0°C | 127 | 21.9 | 12.713 h |
| June | 32.7°C25.6°C | 25.6°C | 114 | 20.4 | 12.913 h |
| July | 31.9°C25.2°C | 25.2°C | 133 | 22.1 | 12.813 h |
| August | 31.4°C25.0°C | 25.0°C | 143 | 23.0 | 12.613 h |
| September | 31.0°C24.6°C | 24.6°C | 197 | 24.1 | 12.212 h |
| October | 29.9°C23.9°C | 23.9°C | 188 | 21.1 | 11.812 h |
| November | 30.2°C22.9°C | 22.9°C | 45 | 6.4 | 11.512 h |
| December | 30.0°C21.5°C | 21.5°C | 10 | 2.2 | 11.311 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Ban I Chang in MayThailand · 21 kmHigh 34.2°C · Low 26.0°C · 141 mm rain
- Nakhon Pathom in MayThailand · 40 kmHigh 34.0°C · Low 26.2°C · 141 mm rain
- Nong Khaem in MayThailand · 60 kmHigh 33.4°C · Low 26.7°C · 144 mm rain
- Ban Samae Dam in MayThailand · 62 kmHigh 32.8°C · Low 27.1°C · 124 mm rain
- Bang Khae in MayThailand · 66 kmHigh 33.4°C · Low 26.9°C · 130 mm rain
- Thawi Watthana in MayThailand · 67 kmHigh 33.7°C · Low 26.6°C · 130 mm rain
- Thung Khru in MayThailand · 76 kmHigh 32.7°C · Low 27.0°C · 130 mm rain
- Bangkok in MayThailand · 78 kmHigh 33.4°C · Low 26.5°C · 130 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ratchaburi) is explained once on the Ratchaburi year overview and on the Sources, method and limits page.