Climate averages 1991–2020
Si Racha weather
in January.
A hot, fairly dry month: the 6th 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 Si Racha: daytime highs average 31.0°C and nights cool to about 22.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 22 mm of rain on roughly 5 days, which makes January a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 26 min on an average January day.
The nearest other city in this atlas is Laem Chabang (11 km away). In January its highs average 30.2°C, 0.9°C cooler than Si Racha, with 27 mm of rain.
Among the 46 cities listed in Thailand, Si Racha ranks joint 11th of 46 for the warmest January highs and joint 34th of 46 for the driest January (rainfall, lowest first). The mean January high of those 46 cities is 30.2°C; Si Racha is 0.9°C warmer than that mean.
From January to February, average highs rise by 0.8°C to 31.8°C, and monthly rainfall rises from 22 mm to 23 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
Si Racha climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 31.0°C22.5°C | 22.5°C | 22 | 4.7 | 11.411 h |
| February | 31.8°C23.8°C | 23.8°C | 23 | 5.1 | 11.712 h |
| March | 32.6°C25.4°C | 25.4°C | 58 | 10.6 | 12.112 h |
| April | 33.1°C26.4°C | 26.4°C | 90 | 14.1 | 12.412 h |
| May | 32.1°C26.6°C | 26.6°C | 145 | 21.2 | 12.713 h |
| June | 31.2°C26.5°C | 26.5°C | 123 | 20.9 | 12.913 h |
| July | 30.6°C26.2°C | 26.2°C | 133 | 22.5 | 12.813 h |
| August | 30.4°C26.0°C | 26.0°C | 136 | 23.3 | 12.613 h |
| September | 30.1°C25.4°C | 25.4°C | 232 | 25.1 | 12.212 h |
| October | 30.1°C24.5°C | 24.5°C | 195 | 21.7 | 11.812 h |
| November | 30.6°C23.7°C | 23.7°C | 43 | 7.1 | 11.512 h |
| December | 30.5°C22.4°C | 22.4°C | 12 | 2.6 | 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
- Laem Chabang in JanuaryThailand · 11 kmHigh 30.2°C · Low 23.1°C · 27 mm rain
- Chon Buri in JanuaryThailand · 22 kmHigh 31.4°C · Low 22.1°C · 22 mm rain
- Pattaya in JanuaryThailand · 27 kmHigh 30.6°C · Low 23.0°C · 27 mm rain
- Samut Prakan in JanuaryThailand · 59 kmHigh 30.5°C · Low 22.6°C · 15 mm rain
- Lat Krabang in JanuaryThailand · 63 kmHigh 31.2°C · Low 21.8°C · 17 mm rain
- Rayong in JanuaryThailand · 65 kmHigh 30.4°C · Low 22.9°C · 28 mm rain
- Ban Khlong Prawet in JanuaryThailand · 66 kmHigh 30.9°C · Low 21.9°C · 17 mm rain
- Thung Khru in JanuaryThailand · 68 kmHigh 30.4°C · Low 22.5°C · 15 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 Si Racha) is explained once on the Si Racha year overview and on the Sources, method and limits page.
Chon Buri lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.