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Chanthaburi, Thailand climate
Am Tropical monsoon
Chanthaburi has a remarkably steady tropical climate (Tropical monsoon, Köppen Am). The hottest month is April with an average daily high near 34°C, while the coldest is December averaging around 22°C at night. Precipitation totals about 2962 mm a year and is strongly seasonal — September alone averages 527 mm while December barely receives 23 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Chanthaburi climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 33 | 33 | 34 | 33 | 32 | 32 | 32 | 32 | 32 | 33 | 32 |
| Avg temp (°C) | 27 | 28 | 29 | 30 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 27 |
| Avg low (°C) | 22 | 23 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 23 | 22 |
| Precipitation (mm) | 54 | 50 | 99 | 94 | 384 | 462 | 479 | 455 | 527 | 292 | 42 | 23 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 33 | 33 | 34 | 33 | 32 |
| Avg temp (°C) | 27 | 28 | 29 | 30 | 29 | 29 |
| Avg low (°C) | 22 | 23 | 24 | 25 | 25 | 25 |
| Precipitation (mm) | 54 | 50 | 99 | 94 | 384 | 462 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 32 | 32 | 32 | 33 | 32 |
| Avg temp (°C) | 28 | 28 | 28 | 28 | 28 | 27 |
| Avg low (°C) | 25 | 25 | 24 | 24 | 23 | 22 |
| Precipitation (mm) | 479 | 455 | 527 | 292 | 42 | 23 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 4 | 7 | 10 | 20 | 23 | 23 | 23 | 24 | 19 | 6 | 2 |
| Days with high ≥ 32°C (days) | 21 | 21 | 26 | 27 | 23 | 18 | 14 | 12 | 12 | 19 | 19 | 17 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 4 | 7 | 10 | 20 | 23 |
| Days with high ≥ 32°C (days) | 21 | 21 | 26 | 27 | 23 | 18 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 23 | 23 | 24 | 19 | 6 | 2 |
| Days with high ≥ 32°C (days) | 14 | 12 | 12 | 19 | 19 | 17 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 47 | 49 | 60 | 72 | 86 | 90 | 91 | 93 | 92 | 81 | 62 | 54 |
| Relative humidity (%) | 74 | 76 | 78 | 78 | 82 | 84 | 85 | 86 | 86 | 84 | 81 | 77 |
| Wind speed (km/h) | 8.4 | 8.8 | 9.4 | 9.0 | 10.2 | 12.0 | 12.8 | 12.8 | 10.5 | 8.2 | 9.4 | 10.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 47 | 49 | 60 | 72 | 86 | 90 |
| Relative humidity (%) | 74 | 76 | 78 | 78 | 82 | 84 |
| Wind speed (km/h) | 8.4 | 8.8 | 9.4 | 9.0 | 10.2 | 12.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 91 | 93 | 92 | 81 | 62 | 54 |
| Relative humidity (%) | 85 | 86 | 86 | 84 | 81 | 77 |
| Wind speed (km/h) | 12.8 | 12.8 | 10.5 | 8.2 | 9.4 | 10.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Chanthaburi, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.