Climate averages 1991–2020
Rayong weather
in January.
A hot, fairly dry month: the 5th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Rayong: daytime highs average 30.4°C and nights cool to about 22.9°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 28 mm of rain on roughly 6 days, which makes January a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 28 min on an average January day.
The nearest other city in this atlas is Pattaya (49 km away). In January its highs average 30.6°C, about as warm as Rayong, with 27 mm of rain.
Among the 46 cities listed in Thailand, Rayong ranks joint 26th of 46 for the warmest January highs and 39th of 46 for the driest January (rainfall, lowest first). The mean January high of those 46 cities is 30.2°C; Rayong is 0.3°C warmer than that mean.
From January to February, average highs rise by 0.2°C to 30.7°C, and monthly rainfall rises from 28 mm to 32 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Pattaya in JanuaryThailand · 49 kmHigh 30.6°C · Low 23.0°C · 27 mm rain
- Laem Chabang in JanuaryThailand · 61 kmHigh 30.2°C · Low 23.1°C · 27 mm rain
- Si Racha in JanuaryThailand · 65 kmHigh 31.0°C · Low 22.5°C · 22 mm rain
- Chon Buri in JanuaryThailand · 81 kmHigh 31.4°C · Low 22.1°C · 22 mm rain
- Chanthaburi in JanuaryThailand · 92 kmHigh 30.4°C · Low 22.2°C · 29 mm rain
- Samut Prakan in JanuaryThailand · 125 kmHigh 30.5°C · Low 22.6°C · 15 mm rain
- Lat Krabang in JanuaryThailand · 127 kmHigh 31.2°C · Low 21.8°C · 17 mm rain
- Ban Khlong Prawet in JanuaryThailand · 131 kmHigh 30.9°C · Low 21.9°C · 17 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.