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Rayong, Thailand climate
Aw Tropical savanna (dry winter)
Rayong has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is May with an average daily high near 94°F, while the coldest is January averaging around 70°F at night. Precipitation totals about 54 inches a year and is strongly seasonal — October alone averages 11.0 inches while February barely receives 0.43 inches.
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)Rayong climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 91 | 92 | 94 | 94 | 93 | 92 | 92 | 91 | 91 | 92 | 91 |
| Avg temp (°F) | 80 | 82 | 84 | 86 | 86 | 86 | 85 | 85 | 84 | 83 | 82 | 81 |
| Avg low (°F) | 70 | 73 | 77 | 79 | 79 | 79 | 78 | 78 | 77 | 75 | 73 | 70 |
| Precipitation (in) | 0.9 | 0.4 | 1.8 | 3.6 | 6.1 | 6.6 | 6.1 | 4.6 | 9.4 | 11.0 | 2.6 | 0.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 91 | 92 | 94 | 94 | 93 |
| Avg temp (°F) | 80 | 82 | 84 | 86 | 86 | 86 |
| Avg low (°F) | 70 | 73 | 77 | 79 | 79 | 79 |
| Precipitation (in) | 0.9 | 0.4 | 1.8 | 3.6 | 6.1 | 6.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 92 | 92 | 91 | 91 | 92 | 91 |
| Avg temp (°F) | 85 | 85 | 84 | 83 | 82 | 81 |
| Avg low (°F) | 78 | 78 | 77 | 75 | 73 | 70 |
| Precipitation (in) | 6.1 | 4.6 | 9.4 | 11.0 | 2.6 | 0.6 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 3 | 5 | 6 | 12 | 14 | 13 | 13 | 17 | 18 | 7 | 3 |
| Days with high ≥ 90°F (days) | 19 | 19 | 23 | 24 | 25 | 23 | 22 | 23 | 20 | 20 | 21 | 21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 3 | 5 | 6 | 12 | 14 |
| Days with high ≥ 90°F (days) | 19 | 19 | 23 | 24 | 25 | 23 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 13 | 13 | 17 | 18 | 7 | 3 |
| Days with high ≥ 90°F (days) | 22 | 23 | 20 | 20 | 21 | 21 |
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 (%) | 71 | 74 | 77 | 77 | 80 | 82 | 82 | 83 | 83 | 81 | 77 | 73 |
| Wind speed (mph) | 7.2 | 7.6 | 8.1 | 7.8 | 8.8 | 10.5 | 11.2 | 11.0 | 8.9 | 7.0 | 8.5 | 9.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 48 | 42 | 52 | 63 | 84 | 89 |
| Relative humidity (%) | 71 | 74 | 77 | 77 | 80 | 82 |
| Wind speed (mph) | 7.2 | 7.6 | 8.1 | 7.8 | 8.8 | 10.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 92 | 91 | 82 | 63 | 54 |
| Relative humidity (%) | 82 | 83 | 83 | 81 | 77 | 73 |
| Wind speed (mph) | 11.2 | 11.0 | 8.9 | 7.0 | 8.5 | 9.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Sattahip, a weather station, about 30 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.