Donghol-Sigon weather in September

In September, Donghol-Sigon sees average daytime highs of 28°C and overnight lows near 20°C, with 329 mm of rain across 28.7 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 5% of the time in September, and the air most often feels muggy.

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 Donghol-Sigon's 10th-clearest and 11th-windiest month. For the whole year in context, see Donghol-Sigon's year-round climate.

Daytime high: 28°; 10th warmest
Overnight low: 20°; 6th coldest
Rainfall: 329 mm; 28.7 wet days
Daylight: 12 h 06 min; 6:41 AM – 6:45 PM
Cloud cover: 79%; 10th clearest
Wind: 4 km/h; 11th windiest
Solar energy: 4.95 kWh/m²
Travel score: 3.3; out of 10

Donghol-Sigon is human settlement in Guinea.

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

← August Donghol-Sigon 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 28°C through the month.

A typical September day in Donghol-Sigon reaches about 28°C in the afternoon and slips back to 20°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°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)	27	27	27	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	28	29	29	29	29	29	29	29	29	29	29
Avg low (°C)	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20

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

How September really feels in Donghol-Sigon

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.

Donghol-Sigon weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 17°	1	0.3	11.4	5.8
Feb	33° / 18°	1	0.3	11.6	4.8
Mar	34° / 20°	4	0.8	11.9	3.8
Apr	35° / 22°	11	2.8	12.3	3.2
May	33° / 22°	97	12.5	12.5	3.2
Jun	29° / 21°	242	24.5	12.7	3.4
Jul	27° / 20°	373	29.1	12.6	3.5
Aug	27° / 20°	409	30	12.4	3.4
Sep	28° / 20°	329	28.7	12.1	3.3
Oct	30° / 19°	153	20.9	11.7	3.9
Nov	31° / 18°	19	3	11.5	5.4
Dec	31° / 17°	2	0.5	11.3	5.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 82%. 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 (%)	10	10	11	11	12	13	15	15	15	16	16	17	17	17	17	17	18	18	18	19	20	21	22	23	24	25	27	29	29	30
Cloudier (%)	90	90	89	89	88	87	85	85	85	84	84	83	83	83	83	83	82	82	82	81	80	79	78	77	76	75	73	71	71	70

	Clearer (%)	Cloudier (%)
1	10	90
2	10	90
3	11	89
4	11	89
5	12	88
6	13	87
7	15	85
8	15	85
9	15	85
10	16	84
11	16	84
12	17	83
13	17	83
14	17	83
15	17	83
16	17	83
17	18	82
18	18	82
19	18	82
20	19	81
21	20	80
22	21	79
23	22	78
24	23	77
25	24	76
26	25	75
27	27	73
28	29	71
29	29	71
30	30	70

Chance of precipitation in September

Any precipitation

Donghol-Sigon gets around 329 mm of rain over 28.7 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 95% and peaks near 97% on the wettest days. The odds ease toward the end of the month.

	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 (%)	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	97	96	96	96	95	95	94	93	92	91	90	89	88	87

	Rain chance (%)
1	97
2	97
3	97
4	97
5	97
6	97
7	97
8	97
9	97
10	97
11	97
12	97
13	97
14	97
15	97
16	97
17	97
18	96
19	96
20	96
21	95
22	95
23	94
24	93
25	92
26	91
27	90
28	89
29	88
30	87

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 80% 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 (%)	84	84	84	83	83	83	82	82	81	81	80	80	79	79	79	78	78	78	78	78	78	78	78	78	78	78	78	78	79	79
Oppressive (%)	16	16	16	17	17	17	18	18	19	19	20	20	21	21	21	22	22	22	22	22	22	22	22	22	22	22	22	22	21	21

	Muggy (%)	Oppressive (%)
1	84	16
2	84	16
3	84	16
4	83	17
5	83	17
6	83	17
7	82	18
8	82	18
9	81	19
10	81	19
11	80	20
12	80	20
13	79	21
14	79	21
15	79	21
16	78	22
17	78	22
18	78	22
19	78	22
20	78	22
21	78	22
22	78	22
23	78	22
24	78	22
25	78	22
26	78	22
27	78	22
28	78	22
29	79	21
30	79	21

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	4	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	4	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 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 6:42 AM to 6:41 AM, and sunset from 6:55 PM to 6:35 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	12.2	12.2	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	11.9	11.9	11.9	11.9
Sunrise (AM)	6:42	6:42	6:42	6:42	6:42	6:42	6:42	6:42	6:42	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41	6:41
Sunset (PM)	6:55	6:55	6:54	6:53	6:53	6:52	6:51	6:51	6:50	6:49	6:49	6:48	6:47	6:47	6:46	6:45	6:44	6:44	6:43	6:42	6:42	6:41	6:40	6:39	6:39	6:38	6:37	6:37	6:36	6:35

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.2	6:42	6:55
2	12.2	6:42	6:55
3	12.2	6:42	6:54
4	12.2	6:42	6:53
5	12.2	6:42	6:53
6	12.2	6:42	6:52
7	12.2	6:42	6:51
8	12.2	6:42	6:51
9	12.1	6:42	6:50
10	12.1	6:41	6:49
11	12.1	6:41	6:49
12	12.1	6:41	6:48
13	12.1	6:41	6:47
14	12.1	6:41	6:47
15	12.1	6:41	6:46
16	12.1	6:41	6:45
17	12.1	6:41	6:44
18	12.0	6:41	6:44
19	12.0	6:41	6:43
20	12.0	6:41	6:42
21	12.0	6:41	6:42
22	12.0	6:41	6:41
23	12.0	6:41	6:40
24	12.0	6:41	6:39
25	12.0	6:41	6:39
26	12.0	6:41	6:38
27	11.9	6:41	6:37
28	11.9	6:41	6:37
29	11.9	6:41	6:36
30	11.9	6:41	6:35

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.95 kWh/m².

For context, solar energy here swings from a low near 4.48 kWh/m² to a high of 6.89 kWh/m² in April across the year — September's 4.95 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)	4.6	4.6	4.7	4.7	4.7	4.7	4.8	4.8	4.8	4.8	4.9	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.1	5.1	5.2	5.2	5.2	5.2	5.2	5.2
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	4.6	Bright
2	4.6	Bright
3	4.7	Bright
4	4.7	Bright
5	4.7	Bright
6	4.7	Bright
7	4.8	Bright
8	4.8	Bright
9	4.8	Bright
10	4.8	Bright
11	4.9	Bright
12	4.9	Bright
13	4.9	Bright
14	4.9	Bright
15	5.0	Bright
16	5.0	Bright
17	5.0	Bright
18	5.0	Bright
19	5.0	Bright
20	5.1	Bright
21	5.1	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	5.2	Bright

Planning a trip in September

Hazard calendar for Donghol-Sigon

In seasonPeak

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

Donghol-Sigon's monsoon runs June–September, when most of the year's rain falls.

Donghol-Sigon sees seasonal dust haze (February–June), heaviest in June.

Monsoon

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Donghol-Sigon?

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

3.3

Sightseeing

10th-best month of the year

3.8

Beach & pool

10th-best month of the year

September is a weaker month for outdoor sightseeing in Donghol-Sigon.

What to pack for Donghol-Sigon in September

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

In September, Donghol-Sigon sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

UV index in Donghol-Sigon 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 Donghol-Sigon peaks around March 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 8 (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	13	11	12	12	14	13	11	9	8
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	13	Extreme
May	11	Extreme
Jun	12	Extreme
Jul	12	Extreme
Aug	14	Extreme
Sep	13	Extreme
Oct	11	Extreme
Nov	9	Very high
Dec	8	Very high

Air quality in Donghol-Sigon 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 Donghol-Sigon is worst in December — around 77 µg/m³ PM2.5 (unhealthy), about 5.9× the cleanest month (August, 13 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)	57	53	50	77	47	26	17	13	17	32	50	77
Level	Unhealthy	Poor	Poor	Unhealthy	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Unhealthy

	PM2.5 (µg/m³)	Level
Jan	57	Unhealthy
Feb	53	Poor
Mar	50	Poor
Apr	77	Unhealthy
May	47	Poor
Jun	26	Moderate
Jul	17	Moderate
Aug	13	Moderate
Sep	17	Moderate
Oct	32	Moderate
Nov	50	Poor
Dec	77	Unhealthy

Location & terrain

Where is Donghol-Sigon?

Donghol-Sigon sits at 11.8°N, 12.2°W, 940 m above sea level, in Guinea. The nearest listed city is Labé, 54 km away.

Topography around Donghol-Sigon

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

Within 3 km, the terrain around Donghol-Sigon has significant variations in elevation — a maximum elevation change of 353 m around an average of 885 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 861 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,449 m.

The land around Donghol-Sigon is covered by grassland (57%) and trees (34%) within 3 km, trees (49%) and grassland (45%) within 16 km, and trees (49%) and grassland (33%) within 80 km.

3 km

353 m

grassland 57%

16 km

861 m

trees 49%

80 km

1,449 m

trees 49%

treesshrubsgrasslandcroplandartificial surfaces

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

September weather nearby: Labé 54 km · Tougué 72 km · Kédougou 84 km · Pita 85 km · Télimélé 134 km · Koumbia 140 km · Koundara 140 km · Kamabi 147 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 Donghol-Sigon (11.8°, -12.2167°, elevation 940 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	27	20
2	27	20
3	27	20
4	28	20
5	28	20
6	28	20
7	28	20
8	28	20
9	28	20
10	28	20
11	28	20
12	28	20
13	28	20
14	28	20
15	28	20
16	28	20
17	28	20
18	28	20
19	28	20
20	28	20
21	29	20
22	29	20
23	29	20
24	29	20
25	29	20
26	29	20
27	29	20
28	29	20
29	29	20
30	29	20

	Clearer (%)	Cloudier (%)
1	10	90
2	10	90
3	11	89
4	11	89
5	12	88
6	13	87
7	15	85
8	15	85
9	15	85
10	16	84
11	16	84
12	17	83
13	17	83
14	17	83
15	17	83
16	17	83
17	18	82
18	18	82
19	18	82
20	19	81
21	20	80
22	21	79
23	22	78
24	23	77
25	24	76
26	25	75
27	27	73
28	29	71
29	29	71
30	30	70

	Rain chance (%)
1	97
2	97
3	97
4	97
5	97
6	97
7	97
8	97
9	97
10	97
11	97
12	97
13	97
14	97
15	97
16	97
17	97
18	96
19	96
20	96
21	95
22	95
23	94
24	93
25	92
26	91
27	90
28	89
29	88
30	87

	Muggy (%)	Oppressive (%)
1	84	16
2	84	16
3	84	16
4	83	17
5	83	17
6	83	17
7	82	18
8	82	18
9	81	19
10	81	19
11	80	20
12	80	20
13	79	21
14	79	21
15	79	21
16	78	22
17	78	22
18	78	22
19	78	22
20	78	22
21	78	22
22	78	22
23	78	22
24	78	22
25	78	22
26	78	22
27	78	22
28	78	22
29	79	21
30	79	21

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

	Clearer (%)	Cloudier (%)
1	10	90
2	10	90
3	11	89
4	11	89
5	12	88
6	13	87
7	15	85
8	15	85
9	15	85
10	16	84
11	16	84
12	17	83
13	17	83
14	17	83
15	17	83
16	17	83
17	18	82
18	18	82
19	18	82
20	19	81
21	20	80
22	21	79
23	22	78
24	23	77
25	24	76
26	25	75
27	27	73
28	29	71
29	29	71
30	30	70

	Rain chance (%)
1	97
2	97
3	97
4	97
5	97
6	97
7	97
8	97
9	97
10	97
11	97
12	97
13	97
14	97
15	97
16	97
17	97
18	96
19	96
20	96
21	95
22	95
23	94
24	93
25	92
26	91
27	90
28	89
29	88
30	87

	Muggy (%)	Oppressive (%)
1	84	16
2	84	16
3	84	16
4	83	17
5	83	17
6	83	17
7	82	18
8	82	18
9	81	19
10	81	19
11	80	20
12	80	20
13	79	21
14	79	21
15	79	21
16	78	22
17	78	22
18	78	22
19	78	22
20	78	22
21	78	22
22	78	22
23	78	22
24	78	22
25	78	22
26	78	22
27	78	22
28	78	22
29	79	21
30	79	21

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

	Clearer (%)	Cloudier (%)
1	10	90
2	10	90
3	11	89
4	11	89
5	12	88
6	13	87
7	15	85
8	15	85
9	15	85
10	16	84
11	16	84
12	17	83
13	17	83
14	17	83
15	17	83
16	17	83
17	18	82
18	18	82
19	18	82
20	19	81
21	20	80
22	21	79
23	22	78
24	23	77
25	24	76
26	25	75
27	27	73
28	29	71
29	29	71
30	30	70

	Rain chance (%)
1	97
2	97
3	97
4	97
5	97
6	97
7	97
8	97
9	97
10	97
11	97
12	97
13	97
14	97
15	97
16	97
17	97
18	96
19	96
20	96
21	95
22	95
23	94
24	93
25	92
26	91
27	90
28	89
29	88
30	87

	Muggy (%)	Oppressive (%)
1	84	16
2	84	16
3	84	16
4	83	17
5	83	17
6	83	17
7	82	18
8	82	18
9	81	19
10	81	19
11	80	20
12	80	20
13	79	21
14	79	21
15	79	21
16	78	22
17	78	22
18	78	22
19	78	22
20	78	22
21	78	22
22	78	22
23	78	22
24	78	22
25	78	22
26	78	22
27	78	22
28	78	22
29	79	21
30	79	21