Ambon weather in September

In September, Ambon sees average daytime highs of 26°C and overnight lows near 25°C, with 71 mm of rain across 14.3 wet days and about 12 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Ambon's 3rd-clearest and 6th-windiest month. For the whole year in context, see Ambon's year-round climate.

Daytime high: 26°; 10th warmest
Overnight low: 25°; 3rd coldest
Rainfall: 71 mm; 14.3 wet days
Daylight: 12 hours; 6:22 AM – 6:21 PM
Cloud cover: 65%; 3rd clearest
Wind: 17 km/h; 6th windiest
Solar energy: 5.74 kWh/m²
Travel score: 5.8; out of 10

Ambon is city in Maluku Province, Indonesia.

Density: 1,163/km²; people per km²
Founded: 1575

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Ambon year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Ambon reaches about 26°C in the afternoon and slips back to 25°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 27°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	27	27	27
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25

	Avg high (°C)	Avg low (°C)
1	26	25
2	26	25
3	26	25
4	26	25
5	26	25
6	26	25
7	26	25
8	26	25
9	26	25
10	26	25
11	26	25
12	26	25
13	26	25
14	26	25
15	26	25
16	26	25
17	26	25
18	26	25
19	26	25
20	26	25
21	26	25
22	26	25
23	26	25
24	26	25
25	26	25
26	26	25
27	26	25
28	27	25
29	27	25
30	27	25

How September really feels in Ambon

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ambon weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	28° / 27°	161	23.6	12.2	4.1
Feb	28° / 27°	121	19.8	12.1	4.3
Mar	28° / 26°	158	22.8	12	4.3
Apr	28° / 26°	203	24.9	11.9	4.0
May	27° / 26°	230	24.6	11.8	4.3
Jun	26° / 25°	241	23.9	11.8	4.4
Jul	26° / 25°	175	21.9	11.8	4.8
Aug	26° / 25°	100	16.7	11.9	5.7
Sep	26° / 25°	71	14.3	12	5.8
Oct	27° / 26°	70	15	12.1	5.7
Nov	28° / 26°	79	16.6	12.2	5.2
Dec	28° / 27°	157	23.8	12.2	3.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 58%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	42	42	41	41	40	39	39	40	40	41	41	40	40	40	41	41	41	42	43	43	43	43	44	44	44	43	44	44	43	43
Cloudier (%)	58	58	59	59	60	61	61	60	60	59	59	60	60	60	59	59	59	58	57	57	57	57	56	56	56	57	56	56	57	57

	Clearer (%)	Cloudier (%)
1	42	58
2	42	58
3	41	59
4	41	59
5	40	60
6	39	61
7	39	61
8	40	60
9	40	60
10	41	59
11	41	59
12	40	60
13	40	60
14	40	60
15	41	59
16	41	59
17	41	59
18	42	58
19	43	57
20	43	57
21	43	57
22	43	57
23	44	56
24	44	56
25	44	56
26	43	57
27	44	56
28	44	56
29	43	57
30	43	57

Chance of precipitation in September

Any precipitation

Ambon gets around 71 mm of rain over 14.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 52% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	46	46	46	47	47	47	48	48	48	49	50	50	51	51	51	52	51	51	51	50	50	49	48	48	47	46	46	45	45	45

	Rain chance (%)
1	46
2	46
3	46
4	47
5	47
6	47
7	48
8	48
9	48
10	49
11	50
12	50
13	51
14	51
15	51
16	52
17	51
18	51
19	51
20	50
21	50
22	49
23	48
24	48
25	47
26	46
27	46
28	45
29	45
30	45

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Muggy (%)	8	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7	6	6	6	5	5	5	5	5	5	5	5	5	5	4
Oppressive (%)	91	91	91	91	91	91	91	92	92	92	92	91	92	92	92	92	92	92	92	93	93	92	92	92	92	91	91	91	90	91
Miserable (%)	1	1	1	1	1	1	1	0	0	0	0	1	1	1	1	1	2	2	2	2	2	3	3	3	3	4	4	4	5	5

	Muggy (%)	Oppressive (%)	Miserable (%)
1	8	91	1
2	8	91	1
3	8	91	1
4	8	91	1
5	8	91	1
6	8	91	1
7	8	91	1
8	8	92	0
9	8	92	0
10	8	92	0
11	8	92	0
12	8	91	1
13	7	92	1
14	7	92	1
15	7	92	1
16	7	92	1
17	6	92	2
18	6	92	2
19	6	92	2
20	5	93	2
21	5	93	2
22	5	92	3
23	5	92	3
24	5	92	3
25	5	92	3
26	5	91	4
27	5	91	4
28	5	91	4
29	5	90	5
30	4	91	5

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	20	20	20	19	19	19	19	19	19	19	18	18	18	18	18	18	17	17	17	17	17	16	16	16	16	16	15	15	15	15
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	20	light breeze
2	20	light breeze
3	20	light breeze
4	19	light breeze
5	19	light breeze
6	19	light breeze
7	19	light breeze
8	19	light breeze
9	19	light breeze
10	19	light breeze
11	18	light breeze
12	18	light breeze
13	18	light breeze
14	18	light breeze
15	18	light breeze
16	18	light breeze
17	17	light breeze
18	17	light breeze
19	17	light breeze
20	17	light breeze
21	17	light breeze
22	16	light breeze
23	16	light breeze
24	16	light breeze
25	16	light breeze
26	16	light breeze
27	15	light breeze
28	15	light breeze
29	15	light breeze
30	15	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:29 AM to 6:16 AM, and sunset from 6:25 PM to 6:17 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:29	6:29	6:28	6:28	6:27	6:27	6:26	6:26	6:26	6:25	6:25	6:24	6:24	6:23	6:23	6:22	6:22	6:21	6:21	6:20	6:20	6:19	6:19	6:18	6:18	6:17	6:17	6:17	6:16	6:16
Sunset (PM)	6:25	6:25	6:24	6:24	6:24	6:24	6:23	6:23	6:23	6:23	6:22	6:22	6:22	6:22	6:21	6:21	6:21	6:20	6:20	6:20	6:20	6:19	6:19	6:19	6:19	6:18	6:18	6:18	6:18	6:17

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	6:29	6:25
2	11.9	6:29	6:25
3	11.9	6:28	6:24
4	11.9	6:28	6:24
5	11.9	6:27	6:24
6	11.9	6:27	6:24
7	11.9	6:26	6:23
8	12.0	6:26	6:23
9	12.0	6:26	6:23
10	12.0	6:25	6:23
11	12.0	6:25	6:22
12	12.0	6:24	6:22
13	12.0	6:24	6:22
14	12.0	6:23	6:22
15	12.0	6:23	6:21
16	12.0	6:22	6:21
17	12.0	6:22	6:21
18	12.0	6:21	6:20
19	12.0	6:21	6:20
20	12.0	6:20	6:20
21	12.0	6:20	6:20
22	12.0	6:19	6:19
23	12.0	6:19	6:19
24	12.0	6:18	6:19
25	12.0	6:18	6:19
26	12.0	6:17	6:18
27	12.0	6:17	6:18
28	12.0	6:17	6:18
29	12.0	6:16	6:18
30	12.0	6:16	6:17

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.74 kWh/m².

For context, solar energy here swings from a low near 4.43 kWh/m² to a high of 6.16 kWh/m² in October across the year — September's 5.74 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	5.5	5.5	5.5	5.5	5.5	5.5	5.6	5.6	5.6	5.6	5.6	5.7	5.7	5.7	5.7	5.7	5.7	5.8	5.8	5.8	5.8	5.9	5.9	5.9	5.9	5.9	6.0	6.0	6.0	6.0
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.5	Bright
2	5.5	Bright
3	5.5	Bright
4	5.5	Bright
5	5.5	Bright
6	5.5	Bright
7	5.6	Bright
8	5.6	Bright
9	5.6	Bright
10	5.6	Bright
11	5.6	Bright
12	5.7	Bright
13	5.7	Bright
14	5.7	Bright
15	5.7	Bright
16	5.7	Bright
17	5.7	Bright
18	5.8	Bright
19	5.8	Bright
20	5.8	Bright
21	5.8	Bright
22	5.9	Bright
23	5.9	Bright
24	5.9	Bright
25	5.9	Bright
26	5.9	Bright
27	6.0	Bright
28	6.0	Bright
29	6.0	Intense
30	6.0	Intense

Planning a trip in September

Is September a good time to visit Ambon?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.8

Sightseeing

1st-best month of the year

5.6

Beach & pool

2nd-best month of the year

September is a reasonable time to visit Ambon for sightseeing.

What to pack for Ambon in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Ambon sees daytime highs around 26°C and nights near 25°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

Sea temperature near Ambon in September

The nearest coast averages about 27°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in April at about 29°C and coldest in August near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	29	29	29	29	29	28	27	27	27	28	29	29
Comfort	Tropical	Tropical	Tropical	Tropical	Tropical	Warm	Warm	Warm	Warm	Tropical	Tropical	Tropical

	Sea temperature (°C)	Comfort
Jan	29	Tropical
Feb	29	Tropical
Mar	29	Tropical
Apr	29	Tropical
May	29	Tropical
Jun	28	Warm
Jul	27	Warm
Aug	27	Warm
Sep	27	Warm
Oct	28	Tropical
Nov	29	Tropical
Dec	29	Tropical

UV index in Ambon in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ambon peaks around February 19 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 11 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	16	15	14	12	11	11	12	14	15	13	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	16	Extreme
Mar	15	Extreme
Apr	14	Extreme
May	12	Extreme
Jun	11	Extreme
Jul	11	Extreme
Aug	12	Extreme
Sep	14	Extreme
Oct	15	Extreme
Nov	13	Extreme
Dec	12	Extreme

Location & terrain

Where is Ambon?

Ambon sits at 3.7°S, 128.2°E, 12 m above sea level, in Indonesia. The nearest listed city is Amahai, 91 km away.

Topography around Ambon

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ambon.

Within 3 km, the terrain around Ambon has significant variations in elevation — a maximum elevation change of 344 m around an average of 62 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 875 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,302 m.

The land around Ambon is covered by trees (40%), water (33%) and artificial surfaces (25%) within 3 km, water (49%) and trees (47%) within 16 km, and water (72%) and trees (27%) within 80 km.

3 km

344 m

trees 40%

16 km

875 m

water 49%

80 km

1,302 m

water 72%

treesgrasslandartificial surfaceswater

← August Ambon year-round climate October →Best places to visit in September

September weather nearby: Amahai 91 km · Masohi 98 km · Namlea 130 km · Namrole 163 km · Kawasi 249 km · Sanana 305 km · Waisai 463 km · Sorong 464 km

Indonesia travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 29% of US; price level, 2025
GDP per capita: $5,060; 2025
Happiness: 5.6 / 10; World Happiness, 2025
Safe drinking water: 30%; of population, 2024
Homicide rate: 0.3; per 100k, 2022
Road deaths: 11.3; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 471
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ambon (-3.6958°, 128.1833°, elevation 12 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	26	25
2	26	25
3	26	25
4	26	25
5	26	25
6	26	25
7	26	25
8	26	25
9	26	25
10	26	25
11	26	25
12	26	25
13	26	25
14	26	25
15	26	25
16	26	25
17	26	25
18	26	25
19	26	25
20	26	25
21	26	25
22	26	25
23	26	25
24	26	25
25	26	25
26	26	25
27	26	25
28	27	25
29	27	25
30	27	25

	Clearer (%)	Cloudier (%)
1	42	58
2	42	58
3	41	59
4	41	59
5	40	60
6	39	61
7	39	61
8	40	60
9	40	60
10	41	59
11	41	59
12	40	60
13	40	60
14	40	60
15	41	59
16	41	59
17	41	59
18	42	58
19	43	57
20	43	57
21	43	57
22	43	57
23	44	56
24	44	56
25	44	56
26	43	57
27	44	56
28	44	56
29	43	57
30	43	57

	Rain chance (%)
1	46
2	46
3	46
4	47
5	47
6	47
7	48
8	48
9	48
10	49
11	50
12	50
13	51
14	51
15	51
16	52
17	51
18	51
19	51
20	50
21	50
22	49
23	48
24	48
25	47
26	46
27	46
28	45
29	45
30	45

	Muggy (%)	Oppressive (%)	Miserable (%)
1	8	91	1
2	8	91	1
3	8	91	1
4	8	91	1
5	8	91	1
6	8	91	1
7	8	91	1
8	8	92	0
9	8	92	0
10	8	92	0
11	8	92	0
12	8	91	1
13	7	92	1
14	7	92	1
15	7	92	1
16	7	92	1
17	6	92	2
18	6	92	2
19	6	92	2
20	5	93	2
21	5	93	2
22	5	92	3
23	5	92	3
24	5	92	3
25	5	92	3
26	5	91	4
27	5	91	4
28	5	91	4
29	5	90	5
30	4	91	5

	Avg high (°C)	Avg low (°C)
1	26	25
2	26	25
3	26	25
4	26	25
5	26	25
6	26	25
7	26	25
8	26	25
9	26	25
10	26	25
11	26	25
12	26	25
13	26	25
14	26	25
15	26	25
16	26	25
17	26	25
18	26	25
19	26	25
20	26	25
21	26	25
22	26	25
23	26	25
24	26	25
25	26	25
26	26	25
27	26	25
28	27	25
29	27	25
30	27	25

	Clearer (%)	Cloudier (%)
1	42	58
2	42	58
3	41	59
4	41	59
5	40	60
6	39	61
7	39	61
8	40	60
9	40	60
10	41	59
11	41	59
12	40	60
13	40	60
14	40	60
15	41	59
16	41	59
17	41	59
18	42	58
19	43	57
20	43	57
21	43	57
22	43	57
23	44	56
24	44	56
25	44	56
26	43	57
27	44	56
28	44	56
29	43	57
30	43	57

	Rain chance (%)
1	46
2	46
3	46
4	47
5	47
6	47
7	48
8	48
9	48
10	49
11	50
12	50
13	51
14	51
15	51
16	52
17	51
18	51
19	51
20	50
21	50
22	49
23	48
24	48
25	47
26	46
27	46
28	45
29	45
30	45

	Muggy (%)	Oppressive (%)	Miserable (%)
1	8	91	1
2	8	91	1
3	8	91	1
4	8	91	1
5	8	91	1
6	8	91	1
7	8	91	1
8	8	92	0
9	8	92	0
10	8	92	0
11	8	92	0
12	8	91	1
13	7	92	1
14	7	92	1
15	7	92	1
16	7	92	1
17	6	92	2
18	6	92	2
19	6	92	2
20	5	93	2
21	5	93	2
22	5	92	3
23	5	92	3
24	5	92	3
25	5	92	3
26	5	91	4
27	5	91	4
28	5	91	4
29	5	90	5
30	4	91	5

	Avg high (°C)	Avg low (°C)
1	26	25
2	26	25
3	26	25
4	26	25
5	26	25
6	26	25
7	26	25
8	26	25
9	26	25
10	26	25
11	26	25
12	26	25
13	26	25
14	26	25
15	26	25
16	26	25
17	26	25
18	26	25
19	26	25
20	26	25
21	26	25
22	26	25
23	26	25
24	26	25
25	26	25
26	26	25
27	26	25
28	27	25
29	27	25
30	27	25

	Clearer (%)	Cloudier (%)
1	42	58
2	42	58
3	41	59
4	41	59
5	40	60
6	39	61
7	39	61
8	40	60
9	40	60
10	41	59
11	41	59
12	40	60
13	40	60
14	40	60
15	41	59
16	41	59
17	41	59
18	42	58
19	43	57
20	43	57
21	43	57
22	43	57
23	44	56
24	44	56
25	44	56
26	43	57
27	44	56
28	44	56
29	43	57
30	43	57

	Rain chance (%)
1	46
2	46
3	46
4	47
5	47
6	47
7	48
8	48
9	48
10	49
11	50
12	50
13	51
14	51
15	51
16	52
17	51
18	51
19	51
20	50
21	50
22	49
23	48
24	48
25	47
26	46
27	46
28	45
29	45
30	45

	Muggy (%)	Oppressive (%)	Miserable (%)
1	8	91	1
2	8	91	1
3	8	91	1
4	8	91	1
5	8	91	1
6	8	91	1
7	8	91	1
8	8	92	0
9	8	92	0
10	8	92	0
11	8	92	0
12	8	91	1
13	7	92	1
14	7	92	1
15	7	92	1
16	7	92	1
17	6	92	2
18	6	92	2
19	6	92	2
20	5	93	2
21	5	93	2
22	5	92	3
23	5	92	3
24	5	92	3
25	5	92	3
26	5	91	4
27	5	91	4
28	5	91	4
29	5	90	5
30	4	91	5