Mkoani weather in September

In September, Mkoani sees average daytime highs of 25°C and overnight lows near 24°C, with 20 mm of rain across 5.1 wet days and about 12 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 78% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Mkoani's 1st-clearest and 6th-windiest month. For the whole year in context, see Mkoani's year-round climate.

Daytime high
25°
10th warmest
Overnight low
24°
3rd coldest
Rainfall
20 mm
5.1 wet days
Daylight
12 hours
6:17 AM – 6:15 PM
Cloud cover
29%
1st clearest
Wind
21 km/h
6th windiest
Solar energy
6.42 kWh/m²
Travel score
8.1
out of 10

Mkoani is capital of Pemba South region, Tanzania.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in Mkoani reaches about 25°C in the afternoon and slips back to 24°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 26°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12524
22524
32524
42524
52524
62524
72524
82524
92524
102524
112524
122524
132524
142524
152524
162524
172524
182524
192524
202524
212524
222525
232525
242525
252525
262525
272525
282525
292525
302625

How September really feels in Mkoani

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.

Mkoani weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 27°26512.37.4
Feb28° / 27°153.612.27.5
Mar28° / 27°9615.9125.3
Apr28° / 26°26726.811.93.9
May27° / 26°26523.811.84.7
Jun26° / 25°6715.411.76.0
Jul25° / 24°3910.311.76.9
Aug25° / 24°23711.87.8
Sep25° / 24°205.1128.1
Oct26° / 25°651012.17.1
Nov27° / 26°7214.612.26.1
Dec28° / 26°6113.912.36.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 78% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 11%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18812
28812
38911
48911
58911
68911
78911
89010
99010
109010
119010
129010
139010
149010
159010
169010
179010
189010
199010
209010
218911
228911
238911
248911
258911
268911
278911
288911
298911
308812

Chance of precipitation in September

Any precipitation

Mkoani gets around 20 mm of rain over 5.1 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 18% and peaks near 21% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
118
218
317
417
517
617
717
817
916
1016
1116
1217
1317
1417
1517
1617
1717
1817
1917
2018
2118
2218
2318
2418
2518
2618
2719
2819
2920
3021

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
15842
25644
35545
45446
55248
65149
75050
84852
94753
104555
114456
124357
134258
144060
153961
163862
173763
183664
193565
203466
213367
223367
233268
243169
253070
262971
272872
282674
292575
302476

Wind in September

Winds average 21 km/h in September.

Across September, daily wind ranges from about 20 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
122breezy
222breezy
322breezy
422breezy
522breezy
622breezy
722breezy
822breezy
922breezy
1022breezy
1122breezy
1222breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2320breezy
2420breezy
2520breezy
2620breezy
2720breezy
2820breezy
2920light breeze
3020light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min 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 6 minutes over September. Sunrise moves from 6:24 AM to 6:09 AM, and sunset from 6:18 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:246:18
211.96:246:18
311.96:236:18
411.96:236:17
511.96:226:17
611.96:226:17
711.96:216:17
811.96:216:17
911.96:206:16
1011.96:206:16
1111.96:196:16
1212.06:196:16
1312.06:186:16
1412.06:186:15
1512.06:176:15
1612.06:176:15
1712.06:166:15
1812.06:166:14
1912.06:156:14
2012.06:156:14
2112.06:146:14
2212.06:136:14
2312.06:136:13
2412.06:126:13
2512.06:126:13
2612.06:116:13
2712.06:116:13
2812.06:106:12
2912.06:106:12
3012.06:096:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.42 kWh/m².

For context, solar energy here swings from a low near 4.78 kWh/m² to a high of 6.85 kWh/m² in February across the year — September's 6.42 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.6Intense
306.6Intense
Planning a trip in September

Hazard calendar for Mkoani

In seasonPeak

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

Mkoani sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Mkoani's monsoon runs April–May, when most of the year's rain falls.

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

Is September a good time to visit Mkoani?

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

8.1
Sightseeing
1st-best month of the year
7.4
Beach & pool
3rd-best month of the year

September is one of the better times to visit Mkoani for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mkoani in September

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

In September, Mkoani sees daytime highs around 25°C and nights near 24°C. Pack sun protection. Worth having: light clothes and a windbreaker. About 5 days see rain.

sun protectionlight clothesa windbreaker

Sea temperature near Mkoani in September

The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in March at about 29°C and coldest in August near 25°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug25Warm
Sep26Warm
Oct27Warm
Nov28Warm
Dec28Tropical

UV index in Mkoani 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 Mkoani peaks around March 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 16UV 14Jun 18UV 10
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun9Very high
Jul10Extreme
Aug10Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Mkoani 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 Mkoani is worst in January — around 18 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (October, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJan 1818 µg/m³Oct 236 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb15Moderate
Mar11Good
Apr7Good
May10Good
Jun11Good
Jul12Good
Aug10Good
Sep8Good
Oct6Good
Nov6Good
Dec13Moderate
Location & terrain

Where is Mkoani?

Mkoani sits at 5.4°S, 39.6°E, 25 m above sea level, in Tanzania. The nearest listed city is Chake Chake, 19 km away.

TangaMlaloMuhezaZanzibarSokoni

Topography around Mkoani

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

Within 3 km, the terrain around Mkoani has only modest variations in elevation — a maximum elevation change of 79 m around an average of 18 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 85 m; within 80 km, only modest variations in elevation — a maximum elevation change of 130 m.

The land around Mkoani is covered by trees (50%) and water (31%) within 3 km, water (62%) and trees (27%) within 16 km, and water (86%) within 80 km.

3 km
79 m
16 km
85 m
80 km
130 m
treesshrubsgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Chake Chake 19 km · Wete 36 km · Nungwi 56 km · Tanga 69 km · Mlalo 93 km · Muheza 99 km · Zanzibar 102 km · Sokoni 119 km

Tanzania travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type D / G
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$1,319
2025
Happiness
3.9 / 10
World Happiness, 2025
Safe drinking water
31%
of population, 2024
Homicide rate
3.7
per 100k, 2020
Road deaths
31.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Low
EF EPI 479
Religion
Christian 63%Muslim 34%folk religion 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 Mkoani (-5.3667°, 39.65°, elevation 25 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).