Masasi weather in September

In September, Masasi sees average daytime highs of 32°C and overnight lows near 20°C, with 2 mm of rain across 0.6 wet days and about 11.9 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels comfortable.

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 Masasi's 1st-clearest and 3rd-windiest month. For the whole year in context, see Masasi's year-round climate.

Daytime high
32°
4th warmest
Overnight low
20°
4th coldest
Rainfall
2 mm
0.6 wet days
Daylight
11 h 54 min
6:21 AM – 6:17 PM
Cloud cover
39%
1st clearest
Wind
11 km/h
3rd windiest
Solar energy
6.13 kWh/m²
Travel score
5.4
out of 10

Masasi is town in Mtwara 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 32°C through the month.

A typical September day in Masasi reaches about 32°C in the afternoon and slips back to 20°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13119
23119
33119
43119
53119
63119
73119
83119
93119
103119
113119
123119
133119
143119
153219
163219
173220
183220
193220
203220
213220
223220
233220
243220
253220
263220
273220
283220
293220
303220

How September really feels in Masasi

Once humidity and wind are folded in, September averages 5 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
5
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Masasi weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°13418.312.63.3
Feb31° / 23°13017.212.43.4
Mar30° / 22°15522.412.13.5
Apr30° / 22°6712.611.84.7
May30° / 20°112.111.55.9
Jun29° / 19°10.311.46.9
Jul29° / 18°10.211.47.1
Aug30° / 19°10.411.66.4
Sep32° / 20°20.611.95.4
Oct33° / 21°9212.24.4
Nov34° / 22°32612.53.6
Dec33° / 23°10315.112.63.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 32% of September, with mostly cloudy or overcast conditions the remaining 15%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28416
38317
48317
58317
68317
78317
88317
98317
108317
118317
128317
138416
148416
158515
168515
178614
188614
198713
208713
218812
228812
238812
248812
258812
268812
278713
288713
298713
308614

Chance of precipitation in September

Any precipitation

Masasi gets around 2 mm of rain over 0.6 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 2% and peaks near 4% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
112
122
132
142
152
162
172
182
192
202
213
223
233
243
253
263
274
284
294
304

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1966241
2965251
3865261
4864271
5863281
6861301
7860311
8858331
9758341
10756361
11754381
12654391
13652411
14550432
15549452
16447472
17445492
18443512
19341533
20340543
21338563
22237574
23235585
24234595
25233596
26131626
27130627
28129628
29128638
30127639

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:31 AM to 6:12 AM, and sunset from 6:18 PM to 6:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:316:18
211.86:306:18
311.86:296:18
411.86:296:18
511.86:286:18
611.86:286:18
711.96:276:18
811.96:266:18
911.96:266:18
1011.96:256:18
1111.96:246:18
1211.96:246:18
1311.96:236:18
1411.96:226:18
1511.96:226:17
1611.96:216:17
1712.06:206:17
1812.06:206:17
1912.06:196:17
2012.06:186:17
2112.06:176:17
2212.06:176:17
2312.06:166:17
2412.06:156:17
2512.06:156:17
2612.06:146:17
2712.16:146:17
2812.16:136:17
2912.16:126:17
3012.16:126:17

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.13 kWh/m².

For context, solar energy here swings from a low near 4.99 kWh/m² to a high of 6.53 kWh/m² in November across the year — September's 6.13 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
66.0Bright
76.0Bright
86.0Intense
96.0Intense
106.0Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Masasi

In seasonPeak

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

Masasi's rainy season runs December–March, when most of the year's rain falls.

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

Is September a good time to visit Masasi?

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

5.4
Sightseeing
5th-best month of the year
8.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Masasi for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Masasi in September

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

In September, Masasi sees daytime highs around 32°C and nights near 20°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Masasi 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 Masasi peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 12UV 15Jun 23UV 9
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme

Air quality in Masasi 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 Masasi is worst in July — around 18 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (May, 10 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodJul 2418 µg/m³May 1510 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb12Moderate
Mar11Good
Apr11Good
May10Good
Jun12Good
Jul18Moderate
Aug18Moderate
Sep11Good
Oct10Good
Nov12Good
Dec10Good
Location & terrain

Where is Masasi?

Masasi sits at 10.7°S, 38.8°E, 449 m above sea level, in Tanzania. The nearest listed city is Lukuledi, 17 km away.

Topography around Masasi

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

Within 3 km, the terrain around Masasi has significant variations in elevation — a maximum elevation change of 448 m around an average of 421 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 654 m; within 80 km, large variations in elevation — a maximum elevation change of 883 m.

The land around Masasi is covered by trees (29%) and artificial surfaces (27%) within 3 km, shrubs (42%) and grassland (35%) within 16 km, and trees (39%), shrubs (33%) and grassland (20%) within 80 km.

3 km
448 m
16 km
654 m
80 km
883 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Lukuledi 17 km · Nachingwea 38 km · Nangomba 39 km · Nanganga 53 km · Newala Kisimani 59 km · Newala 60 km · Luchingu 62 km · Nyangao 68 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 Masasi (-10.7167°, 38.8°, elevation 449 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).