Penja weather in September

In September, Penja sees average daytime highs of 27°C and overnight lows near 21°C, with 396 mm of rain across 29.8 wet days and about 12 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 0% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Penja's 12th-clearest and 5th-windiest month. For the whole year in context, see Penja's year-round climate.

Daytime high
27°
10th warmest
Overnight low
21°
7th coldest
Rainfall
396 mm
29.8 wet days
Daylight
12 hours
6:15 AM – 6:16 PM
Cloud cover
90%
12th clearest
Wind
3 km/h
5th windiest
Solar energy
3.56 kWh/m²
Travel score
3.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Penja reaches about 27°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12621
22621
32621
42621
52621
62621
72621
82721
92721
102721
112721
122721
132721
142721
152721
162721
172721
182721
192721
202721
212721
222721
232721
242721
252721
262721
272721
282721
292721
302721

How September really feels in Penja

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

Penja 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°5814.211.84.3
Feb31° / 21°9415.411.83.6
Mar30° / 22°25427.9122.8
Apr29° / 22°31229.612.12.8
May28° / 22°29930.412.23.0
Jun27° / 21°33929.812.33.3
Jul26° / 21°40030.212.23.5
Aug26° / 21°43130.512.23.4
Sep27° / 21°39629.8123.3
Oct27° / 21°38730.911.93.2
Nov28° / 21°22428.311.83.2
Dec29° / 21°7317.511.74.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 1% of September, with mostly cloudy or overcast conditions the remaining 99%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1199
2199
3199
4199
5199
6199
7199
8199
9199
10199
11199
12199
13199
14199
15199
16199
17199
18199
19199
20199
21199
22199
23199
24199
25199
26199
27199
28199
29199
30199

Chance of precipitation in September

Any precipitation

Penja gets around 396 mm of rain over 29.8 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 99% and peaks near 99% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
199
299
399
499
599
699
799
899
999
1099
1199
1299
1399
1499
1599
1699
1799
1899
1999
2099
2199
2299
2399
2499
2599
2699
2799
2899
2999
3099

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 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
12872
22773
32773
42674
52674
62575
72476
82476
92377
102377
112278
122278
132179
142080
152080
161981
171882
181882
191783
201684
211684
221585
231585
241486
251387
261387
271387
281288
291288
301288

Wind in September

Winds average 3 km/h in September.

Across September, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over September. Sunrise moves from 6:18 AM to 6:12 AM, and sunset from 6:24 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:186:24
212.16:186:23
312.16:186:23
412.16:186:22
512.16:176:22
612.16:176:21
712.16:176:21
812.16:176:20
912.16:176:20
1012.16:166:19
1112.06:166:19
1212.06:166:18
1312.06:166:18
1412.06:156:17
1512.06:156:17
1612.06:156:16
1712.06:156:16
1812.06:146:15
1912.06:146:15
2012.06:146:14
2112.06:146:14
2212.06:136:13
2312.06:136:13
2412.06:136:12
2512.06:136:12
2612.06:136:11
2712.06:126:11
2812.06:126:10
2912.06:126:10
3012.06:126:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.56 kWh/m².

For context, solar energy here swings from a low near 3.29 kWh/m² to a high of 5.21 kWh/m² in February across the year — September's 3.56 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.4Moderate
23.4Moderate
33.4Moderate
43.4Moderate
53.4Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.5Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Penja

In seasonPeak

None of Penja's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Penja sees seasonal dust haze (January–March), heaviest in February.

Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Penja?

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

3.3
Sightseeing
6th-best month of the year
3.3
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Penja.

What to pack for Penja in September

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

In September, Penja sees daytime highs around 27°C and nights near 21°C. Pack rain gear. Worth having: light clothes. About 30 days see rain.

rain gearlight clothes

UV index in Penja 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 Penja peaks around April 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 11UV 14Dec 22UV 9
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec9Very high

Air quality in Penja 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 Penja is worst in February — around 112 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (August, 27 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyFeb 13108 µg/m³Aug 1627 µg/m³
PM2.5 (µg/m³)Level
Jan85Unhealthy
Feb112Unhealthy
Mar64Unhealthy
Apr50Poor
May37Poor
Jun31Moderate
Jul28Moderate
Aug27Moderate
Sep28Moderate
Oct35Poor
Nov46Poor
Dec74Unhealthy
Location & terrain

Where is Penja?

Penja sits at 4.6°N, 9.7°E, 148 m above sea level, in Cameroon. The nearest listed city is Njombé, 7.0 km away.

Topography around Penja

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

Within 3 km, the terrain around Penja has significant variations in elevation — a maximum elevation change of 274 m around an average of 194 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,240 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,007 m.

The land around Penja is covered by trees (88%) within 3 km, trees (95%) within 16 km, and trees (91%) within 80 km.

3 km
274 m
16 km
1,240 m
80 km
4,007 m
treesshrubsgrasslandartificial surfaceswatermangroves
September weather nearby: Njombé 7.0 km · Loum 11 km · Tombel 12 km · Mbanga 20 km · Kumba 26 km · Manjo 28 km · Nkongsamba 45 km · Souza Gare 46 km

Cameroon travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$1,972
2025
Happiness
5.1 / 10
World Happiness, 2025
Homicide rate
6.8
per 100k, 2022
Road deaths
30.2
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 445
Religion
Roman Catholic 33%Muslim 31%Protestant 27%animist 1%

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 Penja (4.6391°, 9.6799°, elevation 148 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).