Banda Aceh, Indonesia climate

BSh Hot semi-arid

Banda Aceh has a remarkably steady tropical climate (Hot semi-arid, Köppen BSh). The hottest month is June with an average daily high near 33°C, while the coldest is December averaging around 23°C at night. Precipitation totals about 583 mm a year and is strongly seasonal — October alone averages 103 mm while May barely receives 18 mm.

☀️ Summers

Hot

Highs near 33°C in June.

About 177 days a year above 32 °C

❄️ Winters

Mild

Lows near 23°C in December.

🌧️ Rain

Moderate rainfall

About 583 mm of rain a year.

Wettest in October

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

+0.4 °C vs 50 years ago

Temperature & precipitation

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

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Banda Aceh climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	31	32	32	33	33	33	33	33	33	32	31	31
Avg temp (°C)	27	27	28	28	28	28	28	28	28	27	27	27
Avg low (°C)	22	22	23	23	23	23	23	23	23	23	23	23
Precipitation (mm)	41	88	60	29	18	22	42	33	29	103	53	64

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	31	32	32	33	33	33
Avg temp (°C)	27	27	28	28	28	28
Avg low (°C)	22	22	23	23	23	23
Precipitation (mm)	41	88	60	29	18	22

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	33	33	33	32	31	31
Avg temp (°C)	28	28	28	27	27	27
Avg low (°C)	23	23	23	23	23	23
Precipitation (mm)	42	33	29	103	53	64

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	1	2	1	1	1	0.7	0.6	1	1	2	2	2
Days with high ≥ 32°C (days)	8	12	18	19	20	20	20	19	17	12	7	6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	1	2	1	1	1	0.7
Days with high ≥ 32°C (days)	8	12	18	19	20	20

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	0.6	1	1	2	2	2
Days with high ≥ 32°C (days)	20	19	17	12	7	6

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	76	73	72	78	83	81	82	84	87	89	89	84
Clear days (≤ 30% cloud)	2	2	2	1	0.8	1	1	0.6	0.3	0.2	0.2	0.7
Partly cloudy days (30–70%)	8	8	10	8	6	6	6	5	4	3	3	5
Cloudy days (≥ 70%)	21	18	19	21	24	23	24	25	26	28	27	25
Relative humidity (%)	82	80	78	78	79	78	77	77	78	81	83	84
Wind speed (km/h)	13.4	11.8	9.5	8.7	11.7	14.2	15.3	15.2	13.2	11.6	10.4	12.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	76	73	72	78	83	81
Clear days (≤ 30% cloud)	2	2	2	1	0.8	1
Partly cloudy days (30–70%)	8	8	10	8	6	6
Cloudy days (≥ 70%)	21	18	19	21	24	23
Relative humidity (%)	82	80	78	78	79	78
Wind speed (km/h)	13.4	11.8	9.5	8.7	11.7	14.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	82	84	87	89	89	84
Clear days (≤ 30% cloud)	1	0.6	0.3	0.2	0.2	0.7
Partly cloudy days (30–70%)	6	5	4	3	3	5
Cloudy days (≥ 70%)	24	25	26	28	27	25
Relative humidity (%)	77	77	78	81	83	84
Wind speed (km/h)	15.3	15.2	13.2	11.6	10.4	12.5

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Sultan Iskandarmuda, a weather station, about 10 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 →