Franceville weather in September

In September, Franceville sees average daytime highs of 29°C and overnight lows near 21°C, with 109 mm of rain across 20.9 wet days and about 12 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels muggy.

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 Franceville's 4th-clearest and 3rd-windiest month. For the whole year in context, see Franceville's year-round climate.

Daytime high: 29°; 9th warmest
Overnight low: 21°; 7th coldest
Rainfall: 109 mm; 20.9 wet days
Daylight: 12 hours; 6:00 AM – 6:00 PM
Cloud cover: 74%; 4th clearest
Wind: 5 km/h; 3rd windiest
Solar energy: 4.77 kWh/m²
Travel score: 3.8; out of 10

Franceville is City in Gabon, West Africa.

Founded: 1880

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

← August Franceville 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 29°C through the month.

A typical September day in Franceville reaches about 29°C in the afternoon and slips back to 21°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 31°C. Set against its neighbours, September runs about 1°C warmer than 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)	29	29	29	29	29	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
Avg low (°C)	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21

	Avg high (°C)	Avg low (°C)
1	29	21
2	29	21
3	29	21
4	29	21
5	29	21
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	29	21
14	29	21
15	29	21
16	29	21
17	30	21
18	30	21
19	30	21
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 Franceville

Once humidity and wind are folded in, September averages 14 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.

Franceville weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 22°	146	21.8	12.1	3.4
Feb	31° / 22°	152	20.3	12.1	3.1
Mar	31° / 22°	176	23.4	12	2.9
Apr	31° / 22°	165	23.6	12	3.0
May	30° / 22°	138	23.5	11.9	3.4
Jun	29° / 21°	40	9.6	11.9	5.6
Jul	28° / 20°	26	6.8	11.9	6.5
Aug	29° / 21°	47	11.7	11.9	5.2
Sep	29° / 21°	109	20.9	12	3.8
Oct	30° / 21°	197	27.4	12	3.1
Nov	30° / 21°	207	26.5	12.1	3.1
Dec	30° / 21°	184	24.9	12.1	3.3

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 20% of September, with mostly cloudy or overcast conditions the remaining 77%.

	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 (%)	21	21	22	22	23	23	23	23	24	24	23	24	24	24	24	24	23	23	23	22	22	22	22	22	22	22	22	22	22	22
Cloudier (%)	79	79	78	78	77	77	77	77	76	76	77	76	76	76	76	76	77	77	77	78	78	78	78	78	78	78	78	78	78	78

	Clearer (%)	Cloudier (%)
1	21	79
2	21	79
3	22	78
4	22	78
5	23	77
6	23	77
7	23	77
8	23	77
9	24	76
10	24	76
11	23	77
12	24	76
13	24	76
14	24	76
15	24	76
16	24	76
17	23	77
18	23	77
19	23	77
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	22	78
26	22	78
27	22	78
28	22	78
29	22	78
30	22	78

Chance of precipitation in September

Any precipitation

Franceville gets around 109 mm of rain over 20.9 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 69% and peaks near 82% on the wettest days. The odds climb 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 (%)	49	50	51	53	55	57	59	61	63	64	66	68	69	71	72	73	74	75	76	76	77	78	78	79	80	80	81	81	82	82

	Rain chance (%)
1	49
2	50
3	51
4	53
5	55
6	57
7	59
8	61
9	63
10	64
11	66
12	68
13	69
14	71
15	72
16	73
17	74
18	75
19	76
20	76
21	77
22	78
23	78
24	79
25	80
26	80
27	81
28	81
29	82
30	82

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 50% 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
Humid (%)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Muggy (%)	79	78	77	76	74	72	70	67	65	63	60	58	55	52	50	47	45	43	40	39	37	35	34	32	31	29	28	27	25	24
Oppressive (%)	20	22	23	24	26	28	30	33	35	37	40	42	45	48	50	53	55	57	60	61	63	65	66	68	69	71	72	73	75	76

	Humid (%)	Muggy (%)	Oppressive (%)
1	1	79	20
2	0	78	22
3	0	77	23
4	0	76	24
5	0	74	26
6	0	72	28
7	0	70	30
8	0	67	33
9	0	65	35
10	0	63	37
11	0	60	40
12	0	58	42
13	0	55	45
14	0	52	48
15	0	50	50
16	0	47	53
17	0	45	55
18	0	43	57
19	0	40	60
20	0	39	61
21	0	37	63
22	0	35	65
23	0	34	66
24	0	32	68
25	0	31	69
26	0	29	71
27	0	28	72
28	0	27	73
29	0	25	75
30	0	24	76

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	5	5	5	5	5	5	5	5	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	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	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 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 6:06 AM to 5:55 AM, and sunset from 6:04 PM to 5:55 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)	6:06	6:06	6:06	6:05	6:05	6:04	6:04	6:04	6:03	6:03	6:02	6:02	6:02	6:01	6:01	6:00	6:00	5:59	5:59	5:59	5:58	5:58	5:57	5:57	5:57	5:56	5:56	5:55	5:55	5:55
Sunset (PM)	6:04	6:04	6:04	6:04	6:03	6:03	6:03	6:02	6:02	6:02	6:01	6:01	6:01	6:00	6:00	6:00	5:59	5:59	5:59	5:58	5:58	5:58	5:57	5:57	5:57	5:57	5:56	5:56	5:56	5:55

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	6:06	6:04
2	12.0	6:06	6:04
3	12.0	6:06	6:04
4	12.0	6:05	6:04
5	12.0	6:05	6:03
6	12.0	6:04	6:03
7	12.0	6:04	6:03
8	12.0	6:04	6:02
9	12.0	6:03	6:02
10	12.0	6:03	6:02
11	12.0	6:02	6:01
12	12.0	6:02	6:01
13	12.0	6:02	6:01
14	12.0	6:01	6:00
15	12.0	6:01	6:00
16	12.0	6:00	6:00
17	12.0	6:00	5:59
18	12.0	5:59	5:59
19	12.0	5:59	5:59
20	12.0	5:59	5:58
21	12.0	5:58	5:58
22	12.0	5:58	5:58
23	12.0	5:57	5:57
24	12.0	5:57	5:57
25	12.0	5:57	5:57
26	12.0	5:56	5:57
27	12.0	5:56	5:56
28	12.0	5:55	5:56
29	12.0	5:55	5:56
30	12.0	5:55	5:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.77 kWh/m².

For context, solar energy here swings from a low near 4.53 kWh/m² to a high of 5.49 kWh/m² in March across the year — September's 4.77 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)	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8
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	4.7	Bright
2	4.7	Bright
3	4.7	Bright
4	4.7	Bright
5	4.7	Bright
6	4.7	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	4.8	Bright
15	4.8	Bright
16	4.8	Bright
17	4.8	Bright
18	4.8	Bright
19	4.8	Bright
20	4.8	Bright
21	4.8	Bright
22	4.8	Bright
23	4.8	Bright
24	4.8	Bright
25	4.8	Bright
26	4.8	Bright
27	4.8	Bright
28	4.8	Bright
29	4.8	Bright
30	4.8	Bright

Planning a trip in September

Is September a good time to visit Franceville?

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

3.8

Sightseeing

4th-best month of the year

5.0

Beach & pool

4th-best month of the year

September is a weaker month for outdoor sightseeing in Franceville.

What to pack for Franceville in September

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

In September, Franceville sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Franceville 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 Franceville peaks around March 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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)	13	12	14	12	10	7	9	9	12	13	12	9
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Extreme	Extreme	Extreme	Very high

	UV index (midday)	Level
Jan	13	Extreme
Feb	12	Extreme
Mar	14	Extreme
Apr	12	Extreme
May	10	Extreme
Jun	7	Very high
Jul	9	Very high
Aug	9	Very high
Sep	12	Extreme
Oct	13	Extreme
Nov	12	Extreme
Dec	9	Very high

Air quality in Franceville 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 Franceville is worst in July — around 28 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (October, 9 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)	22	25	16	14	18	27	28	28	19	9	11	18
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Moderate

	PM2.5 (µg/m³)	Level
Jan	22	Moderate
Feb	25	Moderate
Mar	16	Moderate
Apr	14	Moderate
May	18	Moderate
Jun	27	Moderate
Jul	28	Moderate
Aug	28	Moderate
Sep	19	Moderate
Oct	9	Good
Nov	11	Good
Dec	18	Moderate

Location & terrain

Where is Franceville?

Franceville sits at 1.6°S, 13.6°E, 405 m above sea level, in Gabon. The nearest listed city is Moanda, 43 km away.

Topography around Franceville

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

Within 3 km, the terrain around Franceville has only modest variations in elevation — a maximum elevation change of 155 m around an average of 335 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 264 m; within 80 km, significant variations in elevation — a maximum elevation change of 545 m.

The land around Franceville is covered by trees (66%) within 3 km, trees (72%) within 16 km, and trees (79%) within 80 km.

3 km

155 m

trees 66%

16 km

264 m

trees 72%

80 km

545 m

trees 79%

treesshrubsgrasslandartificial surfaceswater

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

September weather nearby: Moanda 43 km · Koulamoutou 136 km · Djambala 164 km · Mossendjo 176 km · Sibiti 229 km · Gamboma 255 km · Makokou 258 km · Mouyondzi 265 km

Gabon travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / E; 220 V · 50 Hz
Prices: ≈ 37% of US; price level, 2025
GDP per capita: $8,263; 2025
Happiness: 5.2 / 10; World Happiness, 2025
Road deaths: 23.9; per 100k/yr, 2019
Income group: Upper 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 Franceville (-1.6333°, 13.5836°, elevation 405 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	21
2	29	21
3	29	21
4	29	21
5	29	21
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	29	21
14	29	21
15	29	21
16	29	21
17	30	21
18	30	21
19	30	21
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	21	79
2	21	79
3	22	78
4	22	78
5	23	77
6	23	77
7	23	77
8	23	77
9	24	76
10	24	76
11	23	77
12	24	76
13	24	76
14	24	76
15	24	76
16	24	76
17	23	77
18	23	77
19	23	77
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	22	78
26	22	78
27	22	78
28	22	78
29	22	78
30	22	78

	Rain chance (%)
1	49
2	50
3	51
4	53
5	55
6	57
7	59
8	61
9	63
10	64
11	66
12	68
13	69
14	71
15	72
16	73
17	74
18	75
19	76
20	76
21	77
22	78
23	78
24	79
25	80
26	80
27	81
28	81
29	82
30	82

	Humid (%)	Muggy (%)	Oppressive (%)
1	1	79	20
2	0	78	22
3	0	77	23
4	0	76	24
5	0	74	26
6	0	72	28
7	0	70	30
8	0	67	33
9	0	65	35
10	0	63	37
11	0	60	40
12	0	58	42
13	0	55	45
14	0	52	48
15	0	50	50
16	0	47	53
17	0	45	55
18	0	43	57
19	0	40	60
20	0	39	61
21	0	37	63
22	0	35	65
23	0	34	66
24	0	32	68
25	0	31	69
26	0	29	71
27	0	28	72
28	0	27	73
29	0	25	75
30	0	24	76

	Avg high (°C)	Avg low (°C)
1	29	21
2	29	21
3	29	21
4	29	21
5	29	21
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	29	21
14	29	21
15	29	21
16	29	21
17	30	21
18	30	21
19	30	21
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	21	79
2	21	79
3	22	78
4	22	78
5	23	77
6	23	77
7	23	77
8	23	77
9	24	76
10	24	76
11	23	77
12	24	76
13	24	76
14	24	76
15	24	76
16	24	76
17	23	77
18	23	77
19	23	77
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	22	78
26	22	78
27	22	78
28	22	78
29	22	78
30	22	78

	Rain chance (%)
1	49
2	50
3	51
4	53
5	55
6	57
7	59
8	61
9	63
10	64
11	66
12	68
13	69
14	71
15	72
16	73
17	74
18	75
19	76
20	76
21	77
22	78
23	78
24	79
25	80
26	80
27	81
28	81
29	82
30	82

	Humid (%)	Muggy (%)	Oppressive (%)
1	1	79	20
2	0	78	22
3	0	77	23
4	0	76	24
5	0	74	26
6	0	72	28
7	0	70	30
8	0	67	33
9	0	65	35
10	0	63	37
11	0	60	40
12	0	58	42
13	0	55	45
14	0	52	48
15	0	50	50
16	0	47	53
17	0	45	55
18	0	43	57
19	0	40	60
20	0	39	61
21	0	37	63
22	0	35	65
23	0	34	66
24	0	32	68
25	0	31	69
26	0	29	71
27	0	28	72
28	0	27	73
29	0	25	75
30	0	24	76

	Avg high (°C)	Avg low (°C)
1	29	21
2	29	21
3	29	21
4	29	21
5	29	21
6	29	21
7	29	21
8	29	21
9	29	21
10	29	21
11	29	21
12	29	21
13	29	21
14	29	21
15	29	21
16	29	21
17	30	21
18	30	21
19	30	21
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	21	79
2	21	79
3	22	78
4	22	78
5	23	77
6	23	77
7	23	77
8	23	77
9	24	76
10	24	76
11	23	77
12	24	76
13	24	76
14	24	76
15	24	76
16	24	76
17	23	77
18	23	77
19	23	77
20	22	78
21	22	78
22	22	78
23	22	78
24	22	78
25	22	78
26	22	78
27	22	78
28	22	78
29	22	78
30	22	78

	Rain chance (%)
1	49
2	50
3	51
4	53
5	55
6	57
7	59
8	61
9	63
10	64
11	66
12	68
13	69
14	71
15	72
16	73
17	74
18	75
19	76
20	76
21	77
22	78
23	78
24	79
25	80
26	80
27	81
28	81
29	82
30	82

	Humid (%)	Muggy (%)	Oppressive (%)
1	1	79	20
2	0	78	22
3	0	77	23
4	0	76	24
5	0	74	26
6	0	72	28
7	0	70	30
8	0	67	33
9	0	65	35
10	0	63	37
11	0	60	40
12	0	58	42
13	0	55	45
14	0	52	48
15	0	50	50
16	0	47	53
17	0	45	55
18	0	43	57
19	0	40	60
20	0	39	61
21	0	37	63
22	0	35	65
23	0	34	66
24	0	32	68
25	0	31	69
26	0	29	71
27	0	28	72
28	0	27	73
29	0	25	75
30	0	24	76