Nong Khai, Thailand climate

Aw Tropical savanna (dry winter)

Nong Khai has a mildly seasonal tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is April with an average daily high near 36°C, while the coldest is December averaging around 17°C at night. Precipitation totals about 1658 mm a year and is strongly seasonal — August alone averages 338 mm while December barely receives 9 mm.

☀️ All year

Very hot

Daytime highs near 36°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 17°C.

🌧️ Rain

Very wet

About 1658 mm of rain a year.

Wettest in August

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

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)

Nong Khai climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	30	32	35	36	35	33	33	32	32	32	31	29
Avg temp (°C)	23	26	28	30	30	29	29	28	28	28	26	23
Avg low (°C)	17	19	22	24	25	25	25	24	24	23	20	17
Precipitation (mm)	11	18	47	80	223	254	303	338	262	98	15	9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	30	32	35	36	35	33
Avg temp (°C)	23	26	28	30	30	29
Avg low (°C)	17	19	22	24	25	25
Precipitation (mm)	11	18	47	80	223	254

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	33	32	32	32	31	29
Avg temp (°C)	29	28	28	28	26	23
Avg low (°C)	25	24	24	23	20	17
Precipitation (mm)	303	338	262	98	15	9

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	30	33	46	59	79	89	91	91	81	58	40	31
Relative humidity (%)	66	57	52	56	70	79	82	85	85	82	77	72
Wind speed (mph)	3.5	3.8	3.8	3.4	3.2	3.3	3.3	3.1	2.6	2.8	2.9	3.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	30	33	46	59	79	89
Relative humidity (%)	66	57	52	56	70	79
Wind speed (mph)	3.5	3.8	3.8	3.4	3.2	3.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	91	91	81	58	40	31
Relative humidity (%)	82	85	85	82	77	72
Wind speed (mph)	3.3	3.1	2.6	2.8	2.9	3.2

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Nong Khai, 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.

How we build these numbers →