Kilwa Masoko weather in September

In September, Kilwa Masoko sees average daytime highs of 27°C and overnight lows near 23°C, with 10 mm of rain across 3.1 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 10th-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 82% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Kilwa Masoko's 1st-clearest and 5th-windiest month. For the whole year in context, see Kilwa Masoko's year-round climate.

Daytime high
27°
10th warmest
Overnight low
23°
3rd coldest
Rainfall
10 mm
3.1 wet days
Daylight
12 hours
6:18 AM – 6:15 PM
Cloud cover
28%
1st clearest
Wind
15 km/h
5th windiest
Solar energy
6.07 kWh/m²
Travel score
8.0
out of 10

Kilwa Masoko is human settlement.

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 27°C through the month.

A typical September day in Kilwa Masoko reaches about 27°C in the afternoon and slips back to 23°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°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)
12723
22723
32723
42723
52723
62723
72723
82723
92723
102723
112723
122723
132723
142723
152723
162723
172723
182723
192723
202723
212723
222823
232823
242823
252823
262823
272823
282823
292823
302823

How September really feels in Kilwa Masoko

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.

Kilwa Masoko weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 26°11216.512.54.5
Feb29° / 26°10915.112.34.4
Mar29° / 25°18723.812.13.8
Apr29° / 25°17621.611.84.2
May28° / 24°619.611.66.1
Jun28° / 23°132.711.57.5
Jul27° / 23°61.311.58.1
Aug27° / 22°71.911.78.2
Sep27° / 23°103.111.98.0
Oct28° / 24°256.312.27.1
Nov29° / 25°5213.712.45.4
Dec29° / 26°10818.612.54.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 82% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 7%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1928
2937
3937
4928
5928
6928
7928
8937
9937
10937
11937
12937
13937
14937
15937
16937
17937
18937
19937
20946
21946
22946
23946
24946
25946
26946
27946
28946
29937
30928

Chance of precipitation in September

Any precipitation

Kilwa Masoko gets around 10 mm of rain over 3.1 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 10% and peaks near 16% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
15
25
35
45
55
66
76
86
96
107
117
128
138
149
159
1610
1710
1811
1912
2012
2113
2214
2314
2415
2515
2616
2716
2816
2916
3016

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 78% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
13889
23889
338710
438710
528711
628711
728612
828612
928513
1028513
1128414
1218514
1318415
1418316
1518217
1618118
1718019
1817920
1917722
2017623
2117425
2207327
2307129
2406931
2506832
2606634
2706436
2806238
2906040
3005842

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 6:27 AM to 6:09 AM, and sunset from 6:16 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:276:16
211.86:266:16
311.86:266:16
411.96:256:16
511.96:246:16
611.96:246:16
711.96:236:16
811.96:236:16
911.96:226:16
1011.96:216:16
1111.96:216:15
1211.96:206:15
1311.96:206:15
1411.96:196:15
1511.96:186:15
1612.06:186:15
1712.06:176:15
1812.06:166:15
1912.06:166:14
2012.06:156:14
2112.06:156:14
2212.06:146:14
2312.06:136:14
2412.06:136:14
2512.06:126:14
2612.06:126:14
2712.06:116:14
2812.16:106:14
2912.16:106:13
3012.16:096:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.07 kWh/m².

For context, solar energy here swings from a low near 4.93 kWh/m² to a high of 6.46 kWh/m² in October across the year — September's 6.07 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
106.0Bright
116.0Bright
126.0Intense
136.0Intense
146.0Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Kilwa Masoko

In seasonPeak

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

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

Kilwa Masoko's monsoon runs December–April, 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 Kilwa Masoko?

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

8.0
Sightseeing
3rd-best month of the year
8.3
Beach & pool
4th-best month of the year

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

What to pack for Kilwa Masoko in September

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

In September, Kilwa Masoko sees daytime highs around 27°C and nights near 23°C. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

Sea temperature near Kilwa Masoko 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 at the nearest coast (about 13 km away) is warmest in March at about 29°C and coldest in August near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov28Warm
Dec29Tropical

UV index in Kilwa Masoko 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 Kilwa Masoko peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 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 15UV 15Jun 22UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun10Very high
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec13Extreme

Air quality in Kilwa Masoko 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 Kilwa Masoko is worst in January — around 15 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJan 2015 µg/m³Apr 228 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb13Moderate
Mar9Good
Apr8Good
May8Good
Jun8Good
Jul10Good
Aug10Good
Sep9Good
Oct10Good
Nov8Good
Dec9Good
Location & terrain

Where is Kilwa Masoko?

Kilwa Masoko sits at 8.9°S, 39.5°E, 23 m above sea level, in Tanzania. The nearest listed city is Kilindoni, 114 km away.

KilindoniLindiIkwiririRuangwaKibitiBunguNyangaoMtwara

Topography around Kilwa Masoko

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

Within 3 km, the terrain around Kilwa Masoko has only modest variations in elevation — a maximum elevation change of 20 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 114 m; within 80 km, significant variations in elevation — a maximum elevation change of 559 m.

The land around Kilwa Masoko is covered by water (45%) and grassland (31%) within 3 km, water (57%) within 16 km, and water (42%) and trees (37%) within 80 km.

3 km
20 m
16 km
114 m
80 km
559 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Kilindoni 114 km · Lindi 121 km · Ikwiriri 123 km · Ruangwa 142 km · Kibiti 148 km · Bungu 152 km · Nyangao 159 km · Mtwara 166 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 Kilwa Masoko (-8.9251°, 39.5131°, elevation 23 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).