Nansio weather in September

In September, Nansio sees average daytime highs of 25°C and overnight lows near 22°C, with 128 mm of rain across 17.6 wet days and about 12 hours of daylight. It is the 6th-warmest and 8th-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 36% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Nansio's 4th-clearest and 4th-windiest month. For the whole year in context, see Nansio's year-round climate.

Daytime high
25°
6th warmest
Overnight low
22°
7th coldest
Rainfall
128 mm
17.6 wet days
Daylight
12 hours
6:42 AM – 6:42 PM
Cloud cover
56%
4th clearest
Wind
14 km/h
4th windiest
Solar energy
6.34 kWh/m²
Travel score
5.7
out of 10

Nansio is town in Mwanza 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 Nansio reaches about 25°C in the afternoon and slips back to 22°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 24°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)
12521
22521
32521
42521
52521
62522
72522
82522
92522
102522
112522
122522
132522
142522
152522
162522
172522
182522
192522
202522
212522
222522
232522
242522
252522
262522
272522
282522
292522
302522

Nansio weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 22°20023.912.14.7
Feb26° / 22°14918.212.15.1
Mar26° / 22°23021.7124.9
Apr25° / 22°25721.8124.7
May26° / 22°12816.311.95.9
Jun25° / 22°458.211.97.2
Jul25° / 21°173.911.98.2
Aug25° / 21°7010.411.97.1
Sep25° / 22°12817.6125.7
Oct25° / 22°25325.8124.3
Nov25° / 21°3032712.14.0
Dec25° / 22°27026.912.14.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35941
45842
55842
65842
75842
85842
95743
105743
115644
125743
135644
145545
155545
165347
175248
185149
195149
204951
214852
224753
234555
244555
254456
264456
274357
284357
294357
304258

Chance of precipitation in September

Any precipitation

Nansio gets around 128 mm of rain over 17.6 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 59% and peaks near 74% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
147
248
349
450
551
652
753
853
954
1055
1155
1256
1356
1456
1557
1657
1758
1858
1959
2060
2162
2263
2364
2466
2567
2669
2770
2872
2973
3074

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 32% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12304721
21294822
31284922
41274923
51265024
61255024
71245025
80245026
90235126
100235027
110225028
120225028
130214929
141214930
151204930
161204931
171194931
181184832
191184833
201174834
211164836
221154837
231144738
241134739
251124740
261114741
271104642
281104643
29194644
30184545

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours 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 0 minutes over September. Sunrise moves from 6:49 AM to 6:37 AM, and sunset from 6:46 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:496:46
212.06:486:46
312.06:486:46
412.06:486:45
512.06:476:45
612.06:476:45
712.06:466:45
812.06:466:44
912.06:456:44
1012.06:456:44
1112.06:456:43
1212.06:446:43
1312.06:446:43
1412.06:436:42
1512.06:436:42
1612.06:426:42
1712.06:426:41
1812.06:426:41
1912.06:416:41
2012.06:416:41
2112.06:406:40
2212.06:406:40
2312.06:396:40
2412.06:396:39
2512.06:396:39
2612.06:386:39
2712.06:386:38
2812.06:376:38
2912.06:376:38
3012.06:376:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.34 kWh/m².

For context, solar energy here swings from a low near 5.56 kWh/m² to a high of 6.53 kWh/m² in February across the year — September's 6.34 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.2Intense
Planning a trip in September

Hazard calendar for Nansio

In seasonPeak

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

Nansio's rainy season runs October–April, 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 Nansio?

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

5.7
Sightseeing
5th-best month of the year
5.2
Beach & pool
5th-best month of the year

September is a reasonable time to visit Nansio for sightseeing.

What to pack for Nansio in September

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

In September, Nansio sees daytime highs around 25°C and nights near 22°C. Pack rain gear and sun protection. Worth having: light clothes. About 18 days see rain.

rain gearsun protectionlight clothes

UV index in Nansio 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 Nansio peaks around March 16 at about 16 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeMar 16UV 16Jun 18UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May12Extreme
Jun10Very high
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct14Extreme
Nov13Extreme
Dec12Extreme

Air quality in Nansio 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 Nansio is worst in January — around 18 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodJan 2117 µg/m³Nov 128 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb16Moderate
Mar11Good
Apr9Good
May10Good
Jun14Moderate
Jul16Moderate
Aug15Moderate
Sep13Moderate
Oct9Good
Nov8Good
Dec10Good
Location & terrain

Where is Nansio?

Nansio sits at 2.1°S, 33.0°E, 1,134 m above sea level, in Tanzania. The nearest listed city is Muriti, 22 km away.

Sengerema

Topography around Nansio

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

Within 3 km, the terrain around Nansio has only modest variations in elevation — a maximum elevation change of 72 m around an average of 1,143 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 188 m; within 80 km, significant variations in elevation — a maximum elevation change of 473 m.

The land around Nansio is covered by water (69%) within 3 km, water (63%) within 16 km, and water (66%) and cropland (25%) within 80 km.

3 km
72 m
16 km
188 m
80 km
473 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Muriti 22 km · Kibara 44 km · Mwanza 46 km · Kisesa 46 km · Kihangara 60 km · Usagara 61 km · Magu 67 km · Sengerema 74 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 Nansio (-2.1333°, 33.05°, elevation 1,134 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).