Banko weather in September

In September, Banko sees average daytime highs of 30°C and overnight lows near 22°C, with 256 mm of rain across 25.8 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 8% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Banko's 10th-clearest and 11th-windiest month. For the whole year in context, see Banko's year-round climate.

Daytime high: 30°; 10th warmest
Overnight low: 22°; 6th coldest
Rainfall: 256 mm; 25.8 wet days
Daylight: 12 h 06 min; 6:35 AM – 6:39 PM
Cloud cover: 75%; 10th clearest
Wind: 5 km/h; 11th windiest
Solar energy: 4.89 kWh/m²
Travel score: 3.1; out of 10

← August Banko 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 30°C through the month.

A typical September day in Banko reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, September runs about 1°C warmer than 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)	29	29	29	29	29	29	29	29	29	29	29	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
Avg low (°C)	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	21	21	21	21	21	21	21	21	21	21	21

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

How September really feels in Banko

Once humidity and wind are folded in, September averages 26 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.

Banko weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	33° / 19°	2	0.4	11.4	4.7
Feb	35° / 21°	1	0.3	11.6	3.1
Mar	37° / 24°	6	1.6	11.9	1.9
Apr	37° / 25°	26	5.5	12.2	1.7
May	34° / 24°	100	15.2	12.5	2.5
Jun	31° / 23°	196	23.3	12.6	3.1
Jul	29° / 22°	245	25.1	12.6	3.4
Aug	29° / 22°	263	26.6	12.4	3.4
Sep	30° / 22°	256	25.8	12.1	3.1
Oct	31° / 21°	155	21.5	11.8	3.4
Nov	32° / 20°	20	3.4	11.5	4.4
Dec	33° / 19°	1	0.2	11.4	4.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 77%. Skies tend to open up as the month goes on.

	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 (%)	12	12	12	13	14	14	15	16	17	17	19	19	20	21	22	23	24	26	27	28	28	29	30	32	32	34	34	35	37	38
Cloudier (%)	88	88	88	87	86	86	85	84	83	83	81	81	80	79	78	77	76	74	73	72	72	71	70	68	68	66	66	65	63	62

	Clearer (%)	Cloudier (%)
1	12	88
2	12	88
3	12	88
4	13	87
5	14	86
6	14	86
7	15	85
8	16	84
9	17	83
10	17	83
11	19	81
12	19	81
13	20	80
14	21	79
15	22	78
16	23	77
17	24	76
18	26	74
19	27	73
20	28	72
21	28	72
22	29	71
23	30	70
24	32	68
25	32	68
26	34	66
27	34	66
28	35	65
29	37	63
30	38	62

Chance of precipitation in September

Any precipitation

Banko gets around 256 mm of rain over 25.8 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 86% and peaks near 88% 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 (%)	88	88	88	88	87	87	87	87	86	86	86	86	86	86	86	86	86	86	86	86	85	85	85	85	85	84	84	84	83	83

	Rain chance (%)
1	88
2	88
3	88
4	88
5	87
6	87
7	87
8	87
9	86
10	86
11	86
12	86
13	86
14	86
15	86
16	86
17	86
18	86
19	86
20	86
21	85
22	85
23	85
24	85
25	85
26	84
27	84
28	84
29	83
30	83

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 85% 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 (%)	19	19	19	19	18	18	18	17	17	16	16	16	16	15	15	15	14	14	14	13	13	12	12	12	12	11	11	11	11	10
Oppressive (%)	81	81	81	81	82	82	82	83	83	84	84	84	84	85	85	85	86	86	86	87	87	88	88	88	88	89	89	89	89	90

	Muggy (%)	Oppressive (%)
1	19	81
2	19	81
3	19	81
4	19	81
5	18	82
6	18	82
7	18	82
8	17	83
9	17	83
10	16	84
11	16	84
12	16	84
13	16	84
14	15	85
15	15	85
16	15	85
17	14	86
18	14	86
19	14	86
20	13	87
21	13	87
22	12	88
23	12	88
24	12	88
25	12	88
26	11	89
27	11	89
28	11	89
29	11	89
30	10	90

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 6 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)	6	6	6	6	6	6	6	6	6	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
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	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	5	calm
22	5	calm
23	5	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	calm

Sunrise & sunset in September

DaylightNight

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

Days shrink by about 18 minutes over September. Sunrise moves from 6:36 AM to 6:35 AM, and sunset from 6:49 PM to 6:30 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)	12.2	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9
Sunrise (AM)	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:36	6:35	6:35	6:35	6:35	6:35	6:35	6:35	6:35	6:35	6:35	6:35	6:35	6:35	6:35	6:35
Sunset (PM)	6:49	6:48	6:48	6:47	6:46	6:46	6:45	6:44	6:44	6:43	6:42	6:42	6:41	6:40	6:40	6:39	6:38	6:38	6:37	6:36	6:36	6:35	6:34	6:34	6:33	6:32	6:32	6:31	6:30	6:30

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.2	6:36	6:49
2	12.2	6:36	6:48
3	12.2	6:36	6:48
4	12.2	6:36	6:47
5	12.2	6:36	6:46
6	12.2	6:36	6:46
7	12.1	6:36	6:45
8	12.1	6:36	6:44
9	12.1	6:36	6:44
10	12.1	6:36	6:43
11	12.1	6:36	6:42
12	12.1	6:36	6:42
13	12.1	6:36	6:41
14	12.1	6:36	6:40
15	12.1	6:36	6:40
16	12.1	6:35	6:39
17	12.0	6:35	6:38
18	12.0	6:35	6:38
19	12.0	6:35	6:37
20	12.0	6:35	6:36
21	12.0	6:35	6:36
22	12.0	6:35	6:35
23	12.0	6:35	6:34
24	12.0	6:35	6:34
25	12.0	6:35	6:33
26	12.0	6:35	6:32
27	11.9	6:35	6:32
28	11.9	6:35	6:31
29	11.9	6:35	6:30
30	11.9	6:35	6:30

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.89 kWh/m².

For context, solar energy here swings from a low near 4.32 kWh/m² to a high of 6.68 kWh/m² in March across the year — September's 4.89 kWh/m² sits near the bottom.

	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)	4.5	4.5	4.5	4.6	4.6	4.6	4.7	4.7	4.7	4.8	4.8	4.8	4.8	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.2	5.2	5.2	5.2	5.2	5.3
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	4.5	Bright
2	4.5	Bright
3	4.5	Bright
4	4.6	Bright
5	4.6	Bright
6	4.6	Bright
7	4.7	Bright
8	4.7	Bright
9	4.7	Bright
10	4.8	Bright
11	4.8	Bright
12	4.8	Bright
13	4.8	Bright
14	4.9	Bright
15	4.9	Bright
16	4.9	Bright
17	5.0	Bright
18	5.0	Bright
19	5.0	Bright
20	5.0	Bright
21	5.0	Bright
22	5.1	Bright
23	5.1	Bright
24	5.1	Bright
25	5.2	Bright
26	5.2	Bright
27	5.2	Bright
28	5.2	Bright
29	5.2	Bright
30	5.3	Bright

Planning a trip in September

Hazard calendar for Banko

In seasonPeak

In September, Banko sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Banko's monsoon runs June–October, when most of the year's rain falls.

Banko sees seasonal dust haze (February–June), heaviest in April.

Monsoon

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Banko?

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

3.1

Sightseeing

7th-best month of the year

4.2

Beach & pool

11th-best month of the year

September is a weaker month for outdoor sightseeing in Banko.

What to pack for Banko in September

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

In September, Banko sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Banko in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Banko peaks around March 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (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)	9	12	14	12	12	11	12	13	12	11	9	7
Level	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	9	Very high
Feb	12	Extreme
Mar	14	Extreme
Apr	12	Extreme
May	12	Extreme
Jun	11	Extreme
Jul	12	Extreme
Aug	13	Extreme
Sep	12	Extreme
Oct	11	Extreme
Nov	9	Very high
Dec	7	Very high

Air quality in Banko 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 Banko is worst in March — around 81 µg/m³ PM2.5 (unhealthy), about 8.1× the cleanest month (August, 10 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)	63	71	81	68	27	21	13	10	13	23	27	48
Level	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Moderate	Moderate	Moderate	Good	Moderate	Moderate	Moderate	Poor

	PM2.5 (µg/m³)	Level
Jan	63	Unhealthy
Feb	71	Unhealthy
Mar	81	Unhealthy
Apr	68	Unhealthy
May	27	Moderate
Jun	21	Moderate
Jul	13	Moderate
Aug	10	Good
Sep	13	Moderate
Oct	23	Moderate
Nov	27	Moderate
Dec	48	Poor

Location & terrain

Where is Banko?

Banko sits at 10.7°N, 10.7°W, 546 m above sea level, in Guinea. The nearest listed city is Bissikrima, 28 km away.

Topography around Banko

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

Within 3 km, the terrain around Banko has significant variations in elevation — a maximum elevation change of 298 m around an average of 516 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 604 m; within 80 km, large variations in elevation — a maximum elevation change of 694 m.

The land around Banko is covered by trees (41%) and grassland (25%) within 3 km, grassland (38%), trees (27%) and shrubs (21%) within 16 km, and trees (51%) and grassland (26%) within 80 km.

3 km

298 m

trees 41%

16 km

604 m

grassland 38%

80 km

694 m

trees 51%

treesshrubsgrasslandcroplandartificial surfaces

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

September weather nearby: Bissikrima 28 km · Dabola 43 km · Dogomet 52 km · Dinguiraye 64 km · Arfa Moussaïa 71 km · Faranah 75 km · Kouroussa 91 km · Douako 124 km

Guinea travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F / K; 220 V · 50 Hz
Prices: ≈ 34% of US; price level, 2025
GDP per capita: $1,877; 2025
Happiness: 4.6 / 10; World Happiness, 2025
Road deaths: 29.7; per 100k/yr, 2019
Income group: Lower middle; World Bank
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 Banko (10.7167°, -10.7167°, elevation 546 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	29	22
2	29	22
3	29	22
4	29	22
5	29	22
6	29	22
7	29	22
8	29	22
9	29	22
10	29	22
11	29	22
12	30	22
13	30	22
14	30	22
15	30	22
16	30	22
17	30	22
18	30	22
19	30	22
20	30	21
21	30	21
22	30	21
23	30	21
24	30	21
25	30	21
26	30	21
27	30	21
28	30	21
29	30	21
30	30	21

	Clearer (%)	Cloudier (%)
1	12	88
2	12	88
3	12	88
4	13	87
5	14	86
6	14	86
7	15	85
8	16	84
9	17	83
10	17	83
11	19	81
12	19	81
13	20	80
14	21	79
15	22	78
16	23	77
17	24	76
18	26	74
19	27	73
20	28	72
21	28	72
22	29	71
23	30	70
24	32	68
25	32	68
26	34	66
27	34	66
28	35	65
29	37	63
30	38	62

	Rain chance (%)
1	88
2	88
3	88
4	88
5	87
6	87
7	87
8	87
9	86
10	86
11	86
12	86
13	86
14	86
15	86
16	86
17	86
18	86
19	86
20	86
21	85
22	85
23	85
24	85
25	85
26	84
27	84
28	84
29	83
30	83

	Muggy (%)	Oppressive (%)
1	19	81
2	19	81
3	19	81
4	19	81
5	18	82
6	18	82
7	18	82
8	17	83
9	17	83
10	16	84
11	16	84
12	16	84
13	16	84
14	15	85
15	15	85
16	15	85
17	14	86
18	14	86
19	14	86
20	13	87
21	13	87
22	12	88
23	12	88
24	12	88
25	12	88
26	11	89
27	11	89
28	11	89
29	11	89
30	10	90

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

	Clearer (%)	Cloudier (%)
1	12	88
2	12	88
3	12	88
4	13	87
5	14	86
6	14	86
7	15	85
8	16	84
9	17	83
10	17	83
11	19	81
12	19	81
13	20	80
14	21	79
15	22	78
16	23	77
17	24	76
18	26	74
19	27	73
20	28	72
21	28	72
22	29	71
23	30	70
24	32	68
25	32	68
26	34	66
27	34	66
28	35	65
29	37	63
30	38	62

	Rain chance (%)
1	88
2	88
3	88
4	88
5	87
6	87
7	87
8	87
9	86
10	86
11	86
12	86
13	86
14	86
15	86
16	86
17	86
18	86
19	86
20	86
21	85
22	85
23	85
24	85
25	85
26	84
27	84
28	84
29	83
30	83

	Muggy (%)	Oppressive (%)
1	19	81
2	19	81
3	19	81
4	19	81
5	18	82
6	18	82
7	18	82
8	17	83
9	17	83
10	16	84
11	16	84
12	16	84
13	16	84
14	15	85
15	15	85
16	15	85
17	14	86
18	14	86
19	14	86
20	13	87
21	13	87
22	12	88
23	12	88
24	12	88
25	12	88
26	11	89
27	11	89
28	11	89
29	11	89
30	10	90

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

	Clearer (%)	Cloudier (%)
1	12	88
2	12	88
3	12	88
4	13	87
5	14	86
6	14	86
7	15	85
8	16	84
9	17	83
10	17	83
11	19	81
12	19	81
13	20	80
14	21	79
15	22	78
16	23	77
17	24	76
18	26	74
19	27	73
20	28	72
21	28	72
22	29	71
23	30	70
24	32	68
25	32	68
26	34	66
27	34	66
28	35	65
29	37	63
30	38	62

	Rain chance (%)
1	88
2	88
3	88
4	88
5	87
6	87
7	87
8	87
9	86
10	86
11	86
12	86
13	86
14	86
15	86
16	86
17	86
18	86
19	86
20	86
21	85
22	85
23	85
24	85
25	85
26	84
27	84
28	84
29	83
30	83

	Muggy (%)	Oppressive (%)
1	19	81
2	19	81
3	19	81
4	19	81
5	18	82
6	18	82
7	18	82
8	17	83
9	17	83
10	16	84
11	16	84
12	16	84
13	16	84
14	15	85
15	15	85
16	15	85
17	14	86
18	14	86
19	14	86
20	13	87
21	13	87
22	12	88
23	12	88
24	12	88
25	12	88
26	11	89
27	11	89
28	11	89
29	11	89
30	10	90