Ranong, Thailand climate

Am Tropical monsoon

Ranong has a remarkably steady tropical climate (Tropical monsoon, Köppen Am). The hottest month is April with an average daily high near 35°C, while the coldest is December averaging around 23°C at night. Precipitation totals about 3964 mm a year and is strongly seasonal — August alone averages 721 mm while February barely receives 22 mm.

☀️ All year

Hot

Daytime highs near 35°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 23°C.

🌧️ Rain

Very wet

About 3964 mm of rain a year.

Wettest in August

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Ranong climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	33	34	35	35	33	31	31	31	31	31	32	32
Avg temp (°C)	27	28	29	30	29	28	28	27	27	27	27	27
Avg low (°C)	22	22	23	25	25	24	24	24	24	24	23	23
Precipitation (mm)	42	22	69	135	447	583	687	721	673	390	130	65

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	33	34	35	35	33	31
Avg temp (°C)	27	28	29	30	29	28
Avg low (°C)	22	22	23	25	25	24
Precipitation (mm)	42	22	69	135	447	583

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	31	31	31	31	32	32
Avg temp (°C)	28	27	27	27	27	27
Avg low (°C)	24	24	24	24	23	23
Precipitation (mm)	687	721	673	390	130	65

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	55	48	52	68	86	89	89	89	91	86	78	68
Relative humidity (%)	85	81	77	77	86	91	91	91	92	91	90	87
Wind speed (m/s)	0.7	0.7	0.6	0.6	0.7	0.8	0.8	0.8	0.7	0.6	0.7	0.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	55	48	52	68	86	89
Relative humidity (%)	85	81	77	77	86	91
Wind speed (m/s)	0.7	0.7	0.6	0.6	0.7	0.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	89	89	91	86	78	68
Relative humidity (%)	91	91	92	91	90	87
Wind speed (m/s)	0.8	0.8	0.7	0.6	0.7	0.8

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Ranong, a weather station, about 22 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.

How we build these numbers →