Pekanbaru weather in September

In September, Pekanbaru sees average daytime highs of 32°C and overnight lows near 23°C, with 195 mm of rain across 23.8 wet days and about 12 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Pekanbaru's 4th-clearest and 7th-windiest month. For the whole year in context, see Pekanbaru's year-round climate.

Daytime high: 32°; 7th warmest
Overnight low: 23°; 2nd coldest
Rainfall: 195 mm; 23.8 wet days
Daylight: 12 hours; 6:08 AM – 6:09 PM
Cloud cover: 83%; 4th clearest
Wind: 4 km/h; 7th windiest
Solar energy: 5.03 kWh/m²
Travel score: 2.6; out of 10

Pekanbaru is city in Riau Province, Indonesia.

Density: 1,847/km²; people per km²
Founded: 1784

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

← August Pekanbaru 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 32°C through the month.

A typical September day in Pekanbaru reaches about 32°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°C. Set against its neighbours, September runs on par with August and on par with 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)	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32
Avg low (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	24	24	24	24	24	24	24	24	24

	Avg high (°C)	Avg low (°C)
1	32	23
2	32	23
3	32	23
4	32	23
5	32	23
6	32	23
7	32	23
8	32	23
9	32	23
10	32	23
11	32	23
12	32	23
13	32	23
14	32	23
15	32	23
16	32	23
17	32	23
18	32	23
19	32	23
20	32	23
21	32	23
22	32	24
23	32	24
24	32	24
25	32	24
26	32	24
27	32	24
28	32	24
29	32	24
30	32	24

How September really feels in Pekanbaru

Once humidity and wind are folded in, September averages 30 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

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Pekanbaru weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 23°	209	24.1	12	2.9
Feb	31° / 24°	157	21.1	12	2.8
Mar	32° / 24°	213	26.1	12	2.4
Apr	32° / 24°	233	27.9	12	2.2
May	32° / 24°	191	24.9	12	2.4
Jun	32° / 24°	131	19.6	12	2.9
Jul	32° / 24°	124	19.1	12	3.1
Aug	32° / 24°	157	22.1	12	2.8
Sep	32° / 23°	195	23.8	12	2.6
Oct	32° / 24°	241	27	12	2.4
Nov	31° / 24°	298	27.9	12	2.4
Dec	31° / 24°	263	26.8	12	2.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 87%.

	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 (%)	15	15	15	15	16	16	16	15	15	15	15	15	14	13	13	13	13	12	12	11	11	10	9	9	9	9	9	9	8	8
Cloudier (%)	85	85	85	85	84	84	84	85	85	85	85	85	86	87	87	87	87	88	88	89	89	90	91	91	91	91	91	91	92	92

	Clearer (%)	Cloudier (%)
1	15	85
2	15	85
3	15	85
4	15	85
5	16	84
6	16	84
7	16	84
8	15	85
9	15	85
10	15	85
11	15	85
12	15	85
13	14	86
14	13	87
15	13	87
16	13	87
17	13	87
18	12	88
19	12	88
20	11	89
21	11	89
22	10	90
23	9	91
24	9	91
25	9	91
26	9	91
27	9	91
28	9	91
29	8	92
30	8	92

Chance of precipitation in September

Any precipitation

Pekanbaru gets around 195 mm of rain over 23.8 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 80% and peaks near 83% 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 (%)	78	78	78	78	78	77	77	77	77	77	77	77	77	78	78	79	79	80	80	81	81	82	82	82	82	83	83	83	83	83

	Rain chance (%)
1	78
2	78
3	78
4	78
5	78
6	77
7	77
8	77
9	77
10	77
11	77
12	77
13	77
14	78
15	78
16	79
17	79
18	80
19	80
20	81
21	81
22	82
23	82
24	82
25	82
26	83
27	83
28	83
29	83
30	83

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 66% 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
Oppressive (%)	36	36	37	37	37	38	38	38	38	38	38	38	38	37	36	36	35	34	33	32	31	30	29	29	29	28	28	28	28	29
Miserable (%)	64	64	63	63	63	62	62	62	62	62	62	62	62	63	64	64	65	66	67	68	69	70	71	71	71	72	72	72	72	71

	Oppressive (%)	Miserable (%)
1	36	64
2	36	64
3	37	63
4	37	63
5	37	63
6	38	62
7	38	62
8	38	62
9	38	62
10	38	62
11	38	62
12	38	62
13	38	62
14	37	63
15	36	64
16	36	64
17	35	65
18	34	66
19	33	67
20	32	68
21	31	69
22	30	70
23	29	71
24	29	71
25	29	71
26	28	72
27	28	72
28	28	72
29	28	72
30	29	71

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 5 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)	5	5	5	5	5	5	5	5	5	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours 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 0 minutes over September. Sunrise moves from 6:14 AM to 6:04 AM, and sunset from 6:14 PM to 6:03 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)	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	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:14	6:13	6:13	6:13	6:12	6:12	6:12	6:11	6:11	6:11	6:10	6:10	6:10	6:09	6:09	6:08	6:08	6:08	6:07	6:07	6:07	6:06	6:06	6:06	6:05	6:05	6:05	6:04	6:04	6:04
Sunset (PM)	6:14	6:14	6:14	6:13	6:13	6:12	6:12	6:12	6:11	6:11	6:11	6:10	6:10	6:09	6:09	6:09	6:08	6:08	6:07	6:07	6:07	6:06	6:06	6:06	6:05	6:05	6:04	6:04	6:04	6:03

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	6:14	6:14
2	12.0	6:13	6:14
3	12.0	6:13	6:14
4	12.0	6:13	6:13
5	12.0	6:12	6:13
6	12.0	6:12	6:12
7	12.0	6:12	6:12
8	12.0	6:11	6:12
9	12.0	6:11	6:11
10	12.0	6:11	6:11
11	12.0	6:10	6:11
12	12.0	6:10	6:10
13	12.0	6:10	6:10
14	12.0	6:09	6:09
15	12.0	6:09	6:09
16	12.0	6:08	6:09
17	12.0	6:08	6:08
18	12.0	6:08	6:08
19	12.0	6:07	6:07
20	12.0	6:07	6:07
21	12.0	6:07	6:07
22	12.0	6:06	6:06
23	12.0	6:06	6:06
24	12.0	6:06	6:06
25	12.0	6:05	6:05
26	12.0	6:05	6:05
27	12.0	6:05	6:04
28	12.0	6:04	6:04
29	12.0	6:04	6:04
30	12.0	6:04	6:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.97 kWh/m² to a high of 5.03 kWh/m² in September across the year — September's 5.03 kWh/m² sits near the top of that range.

	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)	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.1	5.1	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.0
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	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.0	Bright
2	5.0	Bright
3	5.0	Bright
4	5.0	Bright
5	5.0	Bright
6	5.0	Bright
7	5.0	Bright
8	5.0	Bright
9	5.0	Bright
10	5.0	Bright
11	5.0	Bright
12	5.1	Bright
13	5.1	Bright
14	5.1	Bright
15	5.1	Bright
16	5.1	Bright
17	5.0	Bright
18	5.0	Bright
19	5.0	Bright
20	5.0	Bright
21	5.0	Bright
22	5.0	Bright
23	5.0	Bright
24	5.0	Bright
25	5.0	Bright
26	5.0	Bright
27	5.0	Bright
28	5.0	Bright
29	5.0	Bright
30	5.0	Bright

Planning a trip in September

Is September a good time to visit Pekanbaru?

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

2.6

Sightseeing

7th-best month of the year

4.1

Beach & pool

6th-best month of the year

September is a weaker month for outdoor sightseeing in Pekanbaru.

What to pack for Pekanbaru in September

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

In September, Pekanbaru sees daytime highs around 32°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

UV index in Pekanbaru in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Pekanbaru peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (very high).

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)	13	15	14	13	11	10	10	12	13	14	10	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	15	Extreme
Mar	14	Extreme
Apr	13	Extreme
May	11	Extreme
Jun	10	Very high
Jul	10	Very high
Aug	12	Extreme
Sep	13	Extreme
Oct	14	Extreme
Nov	10	Extreme
Dec	11	Extreme

Air quality in Pekanbaru in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Pekanbaru is worst in September — around 50 µg/m³ PM2.5 (poor), about 2.2× the cleanest month (December, 23 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	25	32	34	30	28	29	33	43	50	42	25	23
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Poor	Poor	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	25	Moderate
Feb	32	Moderate
Mar	34	Moderate
Apr	30	Moderate
May	28	Moderate
Jun	29	Moderate
Jul	33	Moderate
Aug	43	Poor
Sep	50	Poor
Oct	42	Poor
Nov	25	Moderate
Dec	23	Moderate

Location & terrain

Where is Pekanbaru?

Pekanbaru sits at 0.5°N, 101.4°E, 19 m above sea level, in Indonesia. The nearest listed city is Balai Pungut, 63 km away.

Topography around Pekanbaru

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

Within 3 km, the terrain around Pekanbaru has only modest variations in elevation — a maximum elevation change of 24 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 80 m; within 80 km, large variations in elevation — a maximum elevation change of 667 m.

The land around Pekanbaru is covered by artificial surfaces (82%) within 3 km, trees (73%) within 16 km, and trees (95%) within 80 km.

3 km

24 m

artificial surfaces 82%

16 km

80 m

trees 73%

80 km

667 m

trees 95%

treesshrubsgrasslandartificial surfacesbare terrainwater

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

September weather nearby: Balai Pungut 63 km · Payakumbuh 121 km · Dumai 128 km · Sijunjung 145 km · Bukittinggi 150 km · Padangpanjang 158 km · Solok 170 km · Pariaman 194 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 Pekanbaru (0.5167°, 101.4417°, elevation 19 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. 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	32	23
2	32	23
3	32	23
4	32	23
5	32	23
6	32	23
7	32	23
8	32	23
9	32	23
10	32	23
11	32	23
12	32	23
13	32	23
14	32	23
15	32	23
16	32	23
17	32	23
18	32	23
19	32	23
20	32	23
21	32	23
22	32	24
23	32	24
24	32	24
25	32	24
26	32	24
27	32	24
28	32	24
29	32	24
30	32	24

	Clearer (%)	Cloudier (%)
1	15	85
2	15	85
3	15	85
4	15	85
5	16	84
6	16	84
7	16	84
8	15	85
9	15	85
10	15	85
11	15	85
12	15	85
13	14	86
14	13	87
15	13	87
16	13	87
17	13	87
18	12	88
19	12	88
20	11	89
21	11	89
22	10	90
23	9	91
24	9	91
25	9	91
26	9	91
27	9	91
28	9	91
29	8	92
30	8	92

	Rain chance (%)
1	78
2	78
3	78
4	78
5	78
6	77
7	77
8	77
9	77
10	77
11	77
12	77
13	77
14	78
15	78
16	79
17	79
18	80
19	80
20	81
21	81
22	82
23	82
24	82
25	82
26	83
27	83
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	36	64
2	36	64
3	37	63
4	37	63
5	37	63
6	38	62
7	38	62
8	38	62
9	38	62
10	38	62
11	38	62
12	38	62
13	38	62
14	37	63
15	36	64
16	36	64
17	35	65
18	34	66
19	33	67
20	32	68
21	31	69
22	30	70
23	29	71
24	29	71
25	29	71
26	28	72
27	28	72
28	28	72
29	28	72
30	29	71

	Avg high (°C)	Avg low (°C)
1	32	23
2	32	23
3	32	23
4	32	23
5	32	23
6	32	23
7	32	23
8	32	23
9	32	23
10	32	23
11	32	23
12	32	23
13	32	23
14	32	23
15	32	23
16	32	23
17	32	23
18	32	23
19	32	23
20	32	23
21	32	23
22	32	24
23	32	24
24	32	24
25	32	24
26	32	24
27	32	24
28	32	24
29	32	24
30	32	24

	Clearer (%)	Cloudier (%)
1	15	85
2	15	85
3	15	85
4	15	85
5	16	84
6	16	84
7	16	84
8	15	85
9	15	85
10	15	85
11	15	85
12	15	85
13	14	86
14	13	87
15	13	87
16	13	87
17	13	87
18	12	88
19	12	88
20	11	89
21	11	89
22	10	90
23	9	91
24	9	91
25	9	91
26	9	91
27	9	91
28	9	91
29	8	92
30	8	92

	Rain chance (%)
1	78
2	78
3	78
4	78
5	78
6	77
7	77
8	77
9	77
10	77
11	77
12	77
13	77
14	78
15	78
16	79
17	79
18	80
19	80
20	81
21	81
22	82
23	82
24	82
25	82
26	83
27	83
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	36	64
2	36	64
3	37	63
4	37	63
5	37	63
6	38	62
7	38	62
8	38	62
9	38	62
10	38	62
11	38	62
12	38	62
13	38	62
14	37	63
15	36	64
16	36	64
17	35	65
18	34	66
19	33	67
20	32	68
21	31	69
22	30	70
23	29	71
24	29	71
25	29	71
26	28	72
27	28	72
28	28	72
29	28	72
30	29	71

	Avg high (°C)	Avg low (°C)
1	32	23
2	32	23
3	32	23
4	32	23
5	32	23
6	32	23
7	32	23
8	32	23
9	32	23
10	32	23
11	32	23
12	32	23
13	32	23
14	32	23
15	32	23
16	32	23
17	32	23
18	32	23
19	32	23
20	32	23
21	32	23
22	32	24
23	32	24
24	32	24
25	32	24
26	32	24
27	32	24
28	32	24
29	32	24
30	32	24

	Clearer (%)	Cloudier (%)
1	15	85
2	15	85
3	15	85
4	15	85
5	16	84
6	16	84
7	16	84
8	15	85
9	15	85
10	15	85
11	15	85
12	15	85
13	14	86
14	13	87
15	13	87
16	13	87
17	13	87
18	12	88
19	12	88
20	11	89
21	11	89
22	10	90
23	9	91
24	9	91
25	9	91
26	9	91
27	9	91
28	9	91
29	8	92
30	8	92

	Rain chance (%)
1	78
2	78
3	78
4	78
5	78
6	77
7	77
8	77
9	77
10	77
11	77
12	77
13	77
14	78
15	78
16	79
17	79
18	80
19	80
20	81
21	81
22	82
23	82
24	82
25	82
26	83
27	83
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	36	64
2	36	64
3	37	63
4	37	63
5	37	63
6	38	62
7	38	62
8	38	62
9	38	62
10	38	62
11	38	62
12	38	62
13	38	62
14	37	63
15	36	64
16	36	64
17	35	65
18	34	66
19	33	67
20	32	68
21	31	69
22	30	70
23	29	71
24	29	71
25	29	71
26	28	72
27	28	72
28	28	72
29	28	72
30	29	71