Nyamuswa weather in September

In September, Nyamuswa sees average daytime highs of 30°C and overnight lows near 19°C, with 47 mm of rain across 8.7 wet days and about 12 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 21% 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 Nyamuswa's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Nyamuswa's year-round climate.

Daytime high
30°
1st warmest
Overnight low
19°
11th coldest
Rainfall
47 mm
8.7 wet days
Daylight
12 hours
6:39 AM – 6:38 PM
Cloud cover
62%
3rd clearest
Wind
7 km/h
3rd windiest
Solar energy
6.09 kWh/m²
Travel score
5.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Nyamuswa reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12918
22919
32919
42919
52919
62919
72919
82919
93019
103019
113019
123019
133019
143019
153019
163019
173019
183019
193019
203019
213019
223019
233019
243019
253019
263019
273019
283019
293019
303019

Nyamuswa weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°1432012.14.9
Feb29° / 18°11317.112.14.5
Mar29° / 18°15019.8124.4
Apr28° / 18°16020.3124.6
May28° / 18°7312.911.95.7
Jun28° / 18°275.911.96.2
Jul29° / 18°133.211.96.3
Aug29° / 18°33611.95.8
Sep30° / 19°478.7125.1
Oct30° / 19°8814.2124.5
Nov28° / 18°16620.512.14.4
Dec27° / 18°17321.812.14.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25248
35347
45347
55347
65347
75248
85248
95248
105248
115149
125149
135149
145050
155050
164951
174852
184852
194852
204753
214555
224555
234456
244357
254258
264159
274159
284060
294060
303961

Chance of precipitation in September

Any precipitation

Nyamuswa gets around 47 mm of rain over 8.7 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 29% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
329
429
529
629
729
829
929
1029
1129
1228
1328
1428
1527
1627
1727
1827
1927
2027
2128
2229
2329
2430
2531
2631
2732
2833
2933
3034

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 34% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13927330
23927341
33828341
43728341
53629341
63530341
73431341
83332341
93333341
103234331
113134331
123135331
133136321
143136321
153137311
163137311
173137311
183137311
193037311
203037321
212936332
222936342
232836352
242736362
252635372
262535382
272335392
282235412
292135422
301936433

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:45 AM to 6:33 AM, and sunset from 6:43 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:456:43
212.06:446:42
312.06:446:42
412.06:446:42
512.06:436:41
612.06:436:41
712.06:426:41
812.06:426:40
912.06:426:40
1012.06:416:40
1112.06:416:40
1212.06:406:39
1312.06:406:39
1412.06:396:39
1512.06:396:38
1612.06:396:38
1712.06:386:38
1812.06:386:37
1912.06:376:37
2012.06:376:37
2112.06:366:36
2212.06:366:36
2312.06:366:36
2412.06:356:35
2512.06:356:35
2612.06:346:35
2712.06:346:35
2812.06:346:34
2912.06:336:34
3012.06:336:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.09 kWh/m².

For context, solar energy here swings from a low near 5.43 kWh/m² to a high of 6.33 kWh/m² in February across the year — September's 6.09 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
65.9Bright
75.9Bright
86.0Bright
96.0Bright
106.0Intense
116.0Intense
126.0Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.1Intense
Planning a trip in September

Hazard calendar for Nyamuswa

In seasonPeak

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

Nyamuswa'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 Nyamuswa?

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

5.1
Sightseeing
5th-best month of the year
6.9
Beach & pool
4th-best month of the year

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

What to pack for Nyamuswa in September

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

In September, Nyamuswa sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Nyamuswa 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 Nyamuswa peaks around March 17 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 17UV 16Jun 18UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May12Extreme
Jun9Very high
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct14Extreme
Nov13Extreme
Dec12Extreme

Air quality in Nyamuswa 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 Nyamuswa is worst in July — around 20 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodJul 1319 µg/m³Nov 1410 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb16Moderate
Mar13Moderate
Apr11Good
May12Good
Jun18Moderate
Jul20Moderate
Aug16Moderate
Sep15Moderate
Oct11Good
Nov10Good
Dec12Good
Location & terrain

Where is Nyamuswa?

Nyamuswa sits at 1.9°S, 34.0°E, 1,386 m above sea level, in Tanzania. The nearest listed city is Butiama, 16 km away.

TarimeMatongoMugumuNyakabindi

Topography around Nyamuswa

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

Within 3 km, the terrain around Nyamuswa has only modest variations in elevation — a maximum elevation change of 176 m around an average of 1,370 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 573 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around Nyamuswa is covered by cropland (57%) and shrubs (21%) within 3 km, cropland (53%) and shrubs (28%) within 16 km, and grassland (33%) and cropland (32%) within 80 km.

3 km
176 m
16 km
573 m
80 km
656 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Butiama 16 km · Bunda 21 km · Musoma 51 km · Kibara 69 km · Tarime 72 km · Matongo 74 km · Mugumu 76 km · Nyakabindi 82 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 Nyamuswa (-1.9°, 34.0167°, elevation 1,386 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).