Mossaka weather in September

In September, Mossaka sees average daytime highs of 30°C and overnight lows near 23°C, with 140 mm of rain across 23.1 wet days and about 12 hours of daylight. It is the 7th-warmest and 6th-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 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Mossaka's 5th-clearest and 4th-windiest month. For the whole year in context, see Mossaka's year-round climate.

Daytime high: 30°; 7th warmest
Overnight low: 23°; 4th coldest
Rainfall: 140 mm; 23.1 wet days
Daylight: 12 hours; 5:47 AM – 5:47 PM
Cloud cover: 74%; 5th clearest
Wind: 5 km/h; 4th windiest
Solar energy: 5.07 kWh/m²
Travel score: 3.4; out of 10

Mossaka is town in the Republic of the Congo.

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

← August Mossaka 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 Mossaka reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°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 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)	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
Avg low (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23

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

How September really feels in Mossaka

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.

Mossaka weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 23°	108	17.3	12.1	3.8
Feb	31° / 24°	124	16.6	12	3.5
Mar	31° / 24°	149	21.3	12	3.2
Apr	31° / 24°	149	22.6	12	3.1
May	30° / 24°	121	21.1	11.9	3.5
Jun	30° / 23°	51	11.2	11.9	4.9
Jul	29° / 23°	42	10.3	11.9	5.2
Aug	30° / 23°	80	15.5	12	4.4
Sep	30° / 23°	140	23.1	12	3.4
Oct	30° / 23°	195	26.8	12	3.1
Nov	30° / 23°	185	23.9	12.1	3.3
Dec	30° / 23°	150	21.6	12.1	3.6

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 18% of September, with mostly cloudy or overcast conditions the remaining 74%.

	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 (%)	28	28	28	28	28	28	28	28	28	28	28	28	28	28	27	28	27	27	26	25	25	24	23	23	22	22	21	21	20	20
Cloudier (%)	72	72	72	72	72	72	72	72	72	72	72	72	72	72	73	72	73	73	74	75	75	76	77	77	78	78	79	79	80	80

	Clearer (%)	Cloudier (%)
1	28	72
2	28	72
3	28	72
4	28	72
5	28	72
6	28	72
7	28	72
8	28	72
9	28	72
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	27	73
16	28	72
17	27	73
18	27	73
19	26	74
20	25	75
21	25	75
22	24	76
23	23	77
24	23	77
25	22	78
26	22	78
27	21	79
28	21	79
29	20	80
30	20	80

Chance of precipitation in September

Any precipitation

Mossaka gets around 140 mm of rain over 23.1 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 77% 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 (%)	65	66	68	69	70	72	73	74	75	76	77	77	78	78	79	79	79	79	79	79	79	79	80	80	80	81	81	81	81	82

	Rain chance (%)
1	65
2	66
3	68
4	69
5	70
6	72
7	73
8	74
9	75
10	76
11	77
12	77
13	78
14	78
15	79
16	79
17	79
18	79
19	79
20	79
21	79
22	79
23	80
24	80
25	80
26	81
27	81
28	81
29	81
30	82

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 98% 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 (%)	1	1	1	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
Oppressive (%)	98	98	98	98	99	99	99	99	99	99	99	99	99	99	98	98	98	98	98	97	97	97	97	97	97	97	97	97	97	97
Miserable (%)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3

	Muggy (%)	Oppressive (%)	Miserable (%)
1	1	98	1
2	1	98	1
3	1	98	1
4	1	98	1
5	0	99	1
6	0	99	1
7	0	99	1
8	0	99	1
9	0	99	1
10	0	99	1
11	0	99	1
12	0	99	1
13	0	99	1
14	0	99	1
15	0	98	2
16	0	98	2
17	0	98	2
18	0	98	2
19	0	98	2
20	0	97	3
21	0	97	3
22	0	97	3
23	0	97	3
24	0	97	3
25	0	97	3
26	0	97	3
27	0	97	3
28	0	97	3
29	0	97	3
30	0	97	3

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	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	6	calm
3	6	calm
4	6	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 5:53 AM to 5:42 AM, and sunset from 5:52 PM to 5:42 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)	5:53	5:53	5:52	5:52	5:52	5:51	5:51	5:51	5:50	5:50	5:49	5:49	5:49	5:48	5:48	5:47	5:47	5:47	5:46	5:46	5:45	5:45	5:45	5:44	5:44	5:43	5:43	5:43	5:42	5:42
Sunset (PM)	5:52	5:52	5:51	5:51	5:51	5:50	5:50	5:50	5:49	5:49	5:49	5:48	5:48	5:48	5:47	5:47	5:47	5:46	5:46	5:46	5:45	5:45	5:45	5:44	5:44	5:44	5:43	5:43	5:43	5:42

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

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.07 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 5.48 kWh/m² in February across the year — September's 5.07 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)	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	5.1	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
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	5.1	Bright
2	5.1	Bright
3	5.1	Bright
4	5.1	Bright
5	5.1	Bright
6	5.1	Bright
7	5.1	Bright
8	5.1	Bright
9	5.1	Bright
10	5.1	Bright
11	5.1	Bright
12	5.1	Bright
13	5.1	Bright
14	5.1	Bright
15	5.1	Bright
16	5.1	Bright
17	5.1	Bright
18	5.1	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 Mossaka?

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

3.4

Sightseeing

8th-best month of the year

4.7

Beach & pool

9th-best month of the year

September is a weaker month for outdoor sightseeing in Mossaka.

What to pack for Mossaka in September

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

In September, Mossaka sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Mossaka in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mossaka peaks around April 9 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 7 (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)	12	13	13	13	10	8	6	9	11	13	9	9
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	High	Very high	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	12	Extreme
Feb	13	Extreme
Mar	13	Extreme
Apr	13	Extreme
May	10	Extreme
Jun	8	Very high
Jul	6	High
Aug	9	Very high
Sep	11	Extreme
Oct	13	Extreme
Nov	9	Very high
Dec	9	Very high

Air quality in Mossaka 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 Mossaka is worst in July — around 57 µg/m³ PM2.5 (unhealthy), about 5.2× the cleanest month (October, 11 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)	26	31	24	20	24	40	57	53	22	11	13	20
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Unhealthy	Poor	Moderate	Good	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	26	Moderate
Feb	31	Moderate
Mar	24	Moderate
Apr	20	Moderate
May	24	Moderate
Jun	40	Poor
Jul	57	Unhealthy
Aug	53	Poor
Sep	22	Moderate
Oct	11	Good
Nov	13	Moderate
Dec	20	Moderate

Location & terrain

Where is Mossaka?

Mossaka sits at 1.2°S, 16.8°E, 288 m above sea level, in Republic of the Congo. The nearest listed city is Oyo, 92 km away.

Topography around Mossaka

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

Within 3 km, the terrain around Mossaka has only modest variations in elevation — a maximum elevation change of 20 m around an average of 291 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 42 m; within 80 km, only modest variations in elevation — a maximum elevation change of 169 m.

The land around Mossaka is covered by grassland (38%) and water (29%) within 3 km, trees (33%), grassland (29%) and water (23%) within 16 km, and trees (75%) within 80 km.

3 km

20 m

grassland 38%

16 km

42 m

trees 33%

80 km

169 m

trees 75%

treesgrasslandartificial surfaceswaterwetland

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

September weather nearby: Oyo 92 km · Bolobo 122 km · Gamboma 127 km · Owando 129 km · Inongo 183 km · Makoua 188 km · Nioki 194 km · Mushie 200 km

Republic of the Congo travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / E; 230 V · 50 Hz
Prices: ≈ 35% of US; price level, 2025
GDP per capita: $2,515; 2025
Happiness: 4.5 / 10; World Happiness, 2025
Safe drinking water: 46%; of population, 2021
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 Mossaka (-1.2198°, 16.7992°, elevation 288 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	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	30	23
16	30	23
17	30	23
18	30	23
19	30	23
20	30	23
21	30	23
22	30	23
23	30	23
24	30	23
25	30	23
26	30	23
27	30	23
28	30	23
29	30	23
30	30	23

	Clearer (%)	Cloudier (%)
1	28	72
2	28	72
3	28	72
4	28	72
5	28	72
6	28	72
7	28	72
8	28	72
9	28	72
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	27	73
16	28	72
17	27	73
18	27	73
19	26	74
20	25	75
21	25	75
22	24	76
23	23	77
24	23	77
25	22	78
26	22	78
27	21	79
28	21	79
29	20	80
30	20	80

	Rain chance (%)
1	65
2	66
3	68
4	69
5	70
6	72
7	73
8	74
9	75
10	76
11	77
12	77
13	78
14	78
15	79
16	79
17	79
18	79
19	79
20	79
21	79
22	79
23	80
24	80
25	80
26	81
27	81
28	81
29	81
30	82

	Muggy (%)	Oppressive (%)	Miserable (%)
1	1	98	1
2	1	98	1
3	1	98	1
4	1	98	1
5	0	99	1
6	0	99	1
7	0	99	1
8	0	99	1
9	0	99	1
10	0	99	1
11	0	99	1
12	0	99	1
13	0	99	1
14	0	99	1
15	0	98	2
16	0	98	2
17	0	98	2
18	0	98	2
19	0	98	2
20	0	97	3
21	0	97	3
22	0	97	3
23	0	97	3
24	0	97	3
25	0	97	3
26	0	97	3
27	0	97	3
28	0	97	3
29	0	97	3
30	0	97	3

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

	Clearer (%)	Cloudier (%)
1	28	72
2	28	72
3	28	72
4	28	72
5	28	72
6	28	72
7	28	72
8	28	72
9	28	72
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	27	73
16	28	72
17	27	73
18	27	73
19	26	74
20	25	75
21	25	75
22	24	76
23	23	77
24	23	77
25	22	78
26	22	78
27	21	79
28	21	79
29	20	80
30	20	80

	Rain chance (%)
1	65
2	66
3	68
4	69
5	70
6	72
7	73
8	74
9	75
10	76
11	77
12	77
13	78
14	78
15	79
16	79
17	79
18	79
19	79
20	79
21	79
22	79
23	80
24	80
25	80
26	81
27	81
28	81
29	81
30	82

	Muggy (%)	Oppressive (%)	Miserable (%)
1	1	98	1
2	1	98	1
3	1	98	1
4	1	98	1
5	0	99	1
6	0	99	1
7	0	99	1
8	0	99	1
9	0	99	1
10	0	99	1
11	0	99	1
12	0	99	1
13	0	99	1
14	0	99	1
15	0	98	2
16	0	98	2
17	0	98	2
18	0	98	2
19	0	98	2
20	0	97	3
21	0	97	3
22	0	97	3
23	0	97	3
24	0	97	3
25	0	97	3
26	0	97	3
27	0	97	3
28	0	97	3
29	0	97	3
30	0	97	3

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

	Clearer (%)	Cloudier (%)
1	28	72
2	28	72
3	28	72
4	28	72
5	28	72
6	28	72
7	28	72
8	28	72
9	28	72
10	28	72
11	28	72
12	28	72
13	28	72
14	28	72
15	27	73
16	28	72
17	27	73
18	27	73
19	26	74
20	25	75
21	25	75
22	24	76
23	23	77
24	23	77
25	22	78
26	22	78
27	21	79
28	21	79
29	20	80
30	20	80

	Rain chance (%)
1	65
2	66
3	68
4	69
5	70
6	72
7	73
8	74
9	75
10	76
11	77
12	77
13	78
14	78
15	79
16	79
17	79
18	79
19	79
20	79
21	79
22	79
23	80
24	80
25	80
26	81
27	81
28	81
29	81
30	82

	Muggy (%)	Oppressive (%)	Miserable (%)
1	1	98	1
2	1	98	1
3	1	98	1
4	1	98	1
5	0	99	1
6	0	99	1
7	0	99	1
8	0	99	1
9	0	99	1
10	0	99	1
11	0	99	1
12	0	99	1
13	0	99	1
14	0	99	1
15	0	98	2
16	0	98	2
17	0	98	2
18	0	98	2
19	0	98	2
20	0	97	3
21	0	97	3
22	0	97	3
23	0	97	3
24	0	97	3
25	0	97	3
26	0	97	3
27	0	97	3
28	0	97	3
29	0	97	3
30	0	97	3