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Samut Songkhram, Thailand climate
Aw Tropical savanna (dry winter)
Samut Songkhram has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is May with an average daily high near 34°C, while the coldest is January averaging around 22°C at night. Precipitation totals about 957 mm a year and is strongly seasonal — October alone averages 261 mm while February barely receives 4 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)Samut Songkhram climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 32 | 34 | 34 | 33 | 33 | 33 | 33 | 32 | 32 | 31 |
| Avg temp (°C) | 26 | 27 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 28 | 28 | 26 |
| Avg low (°C) | 22 | 23 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 24 | 22 |
| Precipitation (mm) | 19 | 4 | 38 | 40 | 96 | 88 | 90 | 91 | 154 | 261 | 65 | 12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 32 | 34 | 34 | 33 |
| Avg temp (°C) | 26 | 27 | 29 | 30 | 30 | 30 |
| Avg low (°C) | 22 | 23 | 25 | 26 | 26 | 26 |
| Precipitation (mm) | 19 | 4 | 38 | 40 | 96 | 88 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 33 | 33 | 32 | 32 | 31 |
| Avg temp (°C) | 29 | 29 | 29 | 28 | 28 | 26 |
| Avg low (°C) | 26 | 26 | 25 | 25 | 24 | 22 |
| Precipitation (mm) | 90 | 91 | 154 | 261 | 65 | 12 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 48 | 42 | 52 | 63 | 84 | 89 | 90 | 92 | 91 | 82 | 63 | 54 |
| Relative humidity (%) | 72 | 70 | 70 | 70 | 75 | 77 | 78 | 78 | 81 | 83 | 80 | 74 |
| Wind speed (km/h) | 8.6 | 9.8 | 10.5 | 10.0 | 9.2 | 10.0 | 10.6 | 10.4 | 8.1 | 7.7 | 9.5 | 9.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 48 | 42 | 52 | 63 | 84 | 89 |
| Relative humidity (%) | 72 | 70 | 70 | 70 | 75 | 77 |
| Wind speed (km/h) | 8.6 | 9.8 | 10.5 | 10.0 | 9.2 | 10.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 92 | 91 | 82 | 63 | 54 |
| Relative humidity (%) | 78 | 78 | 81 | 83 | 80 | 74 |
| Wind speed (km/h) | 10.6 | 10.4 | 8.1 | 7.7 | 9.5 | 9.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Phetchaburi, a weather station, about 47 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.