Climate averages 1991–2020
Rayong weather
in December.
A hot, fairly dry month: the 6th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Rayong: daytime highs average 30.3°C and nights cool to about 23.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 17 mm of rain on roughly 3 days, which makes December a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 24 min on an average December day.
The nearest other city in this atlas is Pattaya (49 km away). In December its highs average 30.4°C, about as warm as Rayong, with 14 mm of rain.
Among the 46 cities listed in Thailand, Rayong ranks joint 21st of 46 for the warmest December highs and 38th of 46 for the driest December (rainfall, lowest first). The mean December high of those 46 cities is 29.6°C; Rayong is 0.7°C warmer than that mean.
From December to January, average highs rise by 0.1°C to 30.4°C, and monthly rainfall rises from 17 mm to 28 mm.
The annual picture
December 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
Rayong climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.4°C22.9°C | 22.9°C | 28 | 5.9 | 11.511 h |
| February | 30.7°C23.9°C | 23.9°C | 32 | 6.9 | 11.712 h |
| March | 31.0°C25.3°C | 25.3°C | 81 | 14.2 | 12.112 h |
| April | 31.4°C26.2°C | 26.2°C | 133 | 18.9 | 12.412 h |
| May | 30.7°C26.2°C | 26.2°C | 220 | 24.9 | 12.713 h |
| June | 30.0°C26.1°C | 26.1°C | 210 | 24.5 | 12.913 h |
| July | 29.7°C25.9°C | 25.9°C | 206 | 24.9 | 12.813 h |
| August | 29.6°C25.7°C | 25.7°C | 196 | 24.9 | 12.513 h |
| September | 29.4°C25.1°C | 25.1°C | 300 | 26.4 | 12.212 h |
| October | 29.5°C24.4°C | 24.4°C | 256 | 23.2 | 11.912 h |
| November | 30.2°C24.0°C | 24.0°C | 59 | 8.5 | 11.612 h |
| December, selected | 30.3°C23.0°C | 23.0°C | 17 | 3.3 | 11.411 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
December in nearby cities
- Pattaya in DecemberThailand · 49 kmHigh 30.4°C · Low 22.9°C · 14 mm rain
- Laem Chabang in DecemberThailand · 61 kmHigh 29.9°C · Low 22.9°C · 14 mm rain
- Si Racha in DecemberThailand · 65 kmHigh 30.5°C · Low 22.4°C · 12 mm rain
- Chon Buri in DecemberThailand · 81 kmHigh 30.8°C · Low 21.9°C · 12 mm rain
- Chanthaburi in DecemberThailand · 92 kmHigh 30.0°C · Low 22.3°C · 16 mm rain
- Samut Prakan in DecemberThailand · 125 kmHigh 30.3°C · Low 22.3°C · 9.5 mm rain
- Lat Krabang in DecemberThailand · 127 kmHigh 30.7°C · Low 21.6°C · 9.7 mm rain
- Ban Khlong Prawet in DecemberThailand · 131 kmHigh 30.5°C · Low 21.7°C · 9.7 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 Rayong) is explained once on the Rayong year overview and on the Sources, method and limits page.