Mtwango weather in September

In September, Mtwango sees average daytime highs of 23°C and overnight lows near 12°C, with 2 mm of rain across 0.3 wet days and about 11.9 hours of daylight. It is the 6th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 23°C in the first days to 24°C by the end. The sky is clear or mostly clear about 57% of the time in September, and the air most often feels dry.

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

Daytime high
23°
6th warmest
Overnight low
12°
4th coldest
Rainfall
2 mm
0.3 wet days
Daylight
12 hours
6:37 AM – 6:34 PM
Cloud cover
37%
1st clearest
Wind
16 km/h
1st windiest
Solar energy
6.59 kWh/m²
Travel score
8.8
out of 10

Mtwango is town in Njombe 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

Highs climb over the month, from about 23°C in the first days to 24°C by the end.

A typical September day in Mtwango reaches about 23°C in the afternoon and slips back to 12°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 25°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12212
22312
32312
42312
52312
62312
72312
82312
92312
102312
112312
122312
132312
142312
152312
162312
172413
182413
192413
202413
212413
222413
232413
242413
252413
262413
272413
282413
292413
302413

Mtwango weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 16°21625.812.54.3
Feb24° / 16°19823.312.34.2
Mar23° / 16°18124.812.14.4
Apr22° / 15°5612.611.86.1
May22° / 13°92.411.67.9
Jun21° / 11°10.111.58.3
Jul20° / 11°00.111.58.2
Aug22° / 11°10.111.78.5
Sep23° / 12°20.311.98.8
Oct25° / 14°133.312.28.2
Nov25° / 15°498.612.46.9
Dec24° / 16°15019.612.55.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 20%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17624
27525
37525
47525
57525
67525
77525
87723
97723
107822
117822
127921
138020
148020
158119
168218
178317
188317
198317
208416
218416
228416
238416
248317
258317
268218
278218
288218
298218
308119

Chance of precipitation in September

Any precipitation

Mtwango gets around 2 mm of rain over 0.3 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 1% and peaks near 3% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
72
82
92
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
252
262
272
283
293
303

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
2991
3991
4991
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19982
20982
21982
22982
23973
24973
25964
26964
27955
28955
29946
30946

Wind in September

Winds average 16 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 16 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
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light 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 6:46 AM to 6:28 AM, and sunset from 6:35 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:466:35
211.86:456:35
311.86:456:35
411.96:446:35
511.96:436:35
611.96:436:35
711.96:426:35
811.96:426:35
911.96:416:34
1011.96:406:34
1111.96:406:34
1211.96:396:34
1311.96:386:34
1411.96:386:34
1511.96:376:34
1612.06:376:34
1712.06:366:34
1812.06:356:33
1912.06:356:33
2012.06:346:33
2112.06:336:33
2212.06:336:33
2312.06:326:33
2412.06:326:33
2512.06:316:33
2612.06:306:33
2712.06:306:32
2812.16:296:32
2912.16:296:32
3012.16:286:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.59 kWh/m².

For context, solar energy here swings from a low near 4.99 kWh/m² to a high of 6.89 kWh/m² in October across the year — September's 6.59 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.4Intense
106.4Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.6Intense
166.6Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.8Intense
226.8Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.9Intense
286.9Intense
296.9Intense
306.9Intense
Planning a trip in September

Hazard calendar for Mtwango

In seasonPeak

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

Mtwango's monsoon runs December–March, when most of the year's rain falls.

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

Is September a good time to visit Mtwango?

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

8.8
Sightseeing
1st-best month of the year
7.0
Beach & pool
2nd-best month of the year

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

What to pack for Mtwango in September

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

In September, Mtwango sees daytime highs around 23°C and nights near 12°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

UV index in Mtwango 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 Mtwango peaks around February 22 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 16Jun 15UV 10
UV index (midday)Level
Jan16Extreme
Feb16Extreme
Mar16Extreme
Apr15Extreme
May11Extreme
Jun10Extreme
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct15Extreme
Nov14Extreme
Dec14Extreme

Air quality in Mtwango 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 Mtwango is worst in October — around 21 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (May, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodOct 1620 µg/m³May 157 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar10Good
Apr8Good
May7Good
Jun8Good
Jul11Good
Aug14Moderate
Sep17Moderate
Oct21Moderate
Nov17Moderate
Dec10Good
Location & terrain

Where is Mtwango?

Mtwango sits at 9.0°S, 34.8°E, 1,767 m above sea level, in Tanzania. The nearest listed city is Makumbako, 19 km away.

ChimalaMlangaliMafinga

Topography around Mtwango

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

Within 3 km, the terrain around Mtwango has only modest variations in elevation — a maximum elevation change of 125 m around an average of 1,774 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 424 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,233 m.

The land around Mtwango is covered by cropland (69%) within 3 km, cropland (47%) and shrubs (28%) within 16 km, and shrubs (32%), trees (27%) and grassland (22%) within 80 km.

3 km
125 m
16 km
424 m
80 km
2,233 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Makumbako 19 km · Ilembula 27 km · Njombe 37 km · Rujewa 58 km · Urunda 68 km · Chimala 87 km · Mlangali 91 km · Mafinga 96 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 Mtwango (-9.0167°, 34.8°, elevation 1,767 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).