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Attapeu, Laos climate

Aw Tropical savanna (dry winter)

Attapeu has a mildly seasonal tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is April with an average daily high near 35°C, while the coldest is December averaging around 17°C at night. Precipitation totals about 1686 mm a year and is strongly seasonal — July alone averages 336 mm while January barely receives 3 mm.

☀️ All year

Hot

Daytime highs near 35°C most of the year.

About 120 days a year above 32 °C

🌙 Nights

Stays warm

Even the coolest nights stay near 17°C.

🌧️ Rain

Very wet

About 1686 mm of rain a year.

Wettest in July

⛅ Sky & trend

Often cloudy

Cloudy skies 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)

Attapeu climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	28	31	33	35	33	31	30	30	29	29	29	27
Avg temp (°C)	22	24	27	29	28	27	27	26	26	25	24	22
Avg low (°C)	16	18	21	23	24	23	23	23	22	21	19	17
Precipitation (mm)	3	6	28	62	191	255	336	333	287	132	43	10

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	28	31	33	35	33	31
Avg temp (°C)	22	24	27	29	28	27
Avg low (°C)	16	18	21	23	24	23
Precipitation (mm)	3	6	28	62	191	255

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	30	30	29	29	29	27
Avg temp (°C)	27	26	26	25	24	22
Avg low (°C)	23	23	22	21	19	17
Precipitation (mm)	336	333	287	132	43	10

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with high ≥ 32°C (days)	5	11	20	23	19	11	8	6	5	5	5	4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with high ≥ 32°C (days)	5	11	20	23	19	11

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with high ≥ 32°C (days)	8	6	5	5	5	4

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	36	35	48	67	81	87	89	91	88	69	51	46
Relative humidity (%)	73	66	62	62	72	78	80	83	85	84	81	78
Wind speed (km/h)	0.3	0.4	0.4	0.3	0.3	0.2	0.2	0.2	0.3	0.3	0.2	0.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	36	35	48	67	81	87
Relative humidity (%)	73	66	62	62	72	78
Wind speed (km/h)	0.3	0.4	0.4	0.3	0.3	0.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	89	91	88	69	51	46
Relative humidity (%)	80	83	85	84	81	78
Wind speed (km/h)	0.2	0.2	0.3	0.3	0.2	0.2

Methodology & sources

Temperature & precipitation — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.

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 →