Kiomboi weather in September

In September, Kiomboi sees average daytime highs of 31°C and overnight lows near 18°C, with 2 mm of rain across 0.5 wet days and about 12 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 34% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Kiomboi's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Kiomboi's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
18°
5th coldest
Rainfall
2 mm
0.5 wet days
Daylight
12 hours
6:38 AM – 6:36 PM
Cloud cover
50%
3rd clearest
Wind
12 km/h
3rd windiest
Solar energy
7.1 kWh/m²
Travel score
5.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in Kiomboi reaches about 31°C in the afternoon and slips back to 18°C overnight — a 13°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)
13118
23118
33118
43118
53118
63118
73118
83118
93118
103118
113118
123118
133118
143118
153118
163118
173118
183218
193218
203218
213218
223219
233219
243219
253219
263219
273219
283219
293219
303219

How September really feels in Kiomboi

Once humidity and wind are folded in, September averages 1 day 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
1
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.

Kiomboi weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°14117.612.24.9
Feb29° / 19°10414.512.14.7
Mar29° / 19°14216.7124.6
Apr28° / 19°11613.611.95.2
May29° / 18°204.111.86.3
Jun29° / 17°10.311.86.7
Jul29° / 16°00.111.87.0
Aug30° / 17°10.211.96.3
Sep31° / 18°20.5125.3
Oct32° / 19°183.212.14.5
Nov31° / 20°10110.412.24.4
Dec29° / 19°16818.512.24.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 31% of September, with mostly cloudy or overcast conditions the remaining 35%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26634
36634
46634
56634
66634
76634
86634
96634
106634
116634
126634
136634
146634
156634
166634
176634
186535
196535
206535
216436
226436
236337
246337
256238
266238
276238
286040
296040
306040

Chance of precipitation in September

Any precipitation

Kiomboi gets around 2 mm of rain over 0.5 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 (%)
12
22
32
42
52
62
72
82
92
102
112
122
132
141
151
161
171
181
191
201
211
221
232
242
252
263
273
283
294
304

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 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19721
29721
39721
49721
59721
69721
79721
89721
99721
109721
119721
129721
139721
149721
159721
169820
179820
189730
199730
209730
219640
229640
239550
249550
259361
269361
279361
289271
299271
309181

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min 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 6 minutes over September. Sunrise moves from 6:45 AM to 6:31 AM, and sunset from 6:40 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:456:40
211.96:446:40
311.96:446:39
411.96:436:39
511.96:436:39
611.96:426:39
711.96:426:38
811.96:416:38
911.96:416:38
1012.06:406:38
1112.06:406:37
1212.06:406:37
1312.06:396:37
1412.06:396:37
1512.06:386:36
1612.06:386:36
1712.06:376:36
1812.06:376:36
1912.06:366:35
2012.06:366:35
2112.06:356:35
2212.06:356:35
2312.06:346:34
2412.06:346:34
2512.06:336:34
2612.06:336:34
2712.06:326:33
2812.06:326:33
2912.06:316:33
3012.06:316:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 7.1 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 5.86 kWh/m² to a high of 7.1 kWh/m² in September across the year — September's 7.1 kWh/m² sits near the top of that range.

02468151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.9Intense
46.9Intense
56.9Intense
66.9Intense
76.9Intense
86.9Intense
97.0Intense
107.0Intense
117.0Intense
127.0Intense
137.0Intense
147.1Intense
157.1Intense
167.1Intense
177.1Intense
187.2Intense
197.2Intense
207.2Intense
217.2Intense
227.2Intense
237.2Intense
247.2Intense
257.2Intense
267.3Intense
277.3Intense
287.3Intense
297.3Intense
307.2Intense
Planning a trip in September

Hazard calendar for Kiomboi

In seasonPeak

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

Kiomboi's rainy season runs November–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 Kiomboi?

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

5.3
Sightseeing
5th-best month of the year
8.0
Beach & pool
4th-best month of the year

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

What to pack for Kiomboi in September

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

In September, Kiomboi sees daytime highs around 31°C and nights near 18°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Kiomboi 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 Kiomboi peaks around March 13 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 13UV 16Jun 17UV 10
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar16Extreme
Apr15Extreme
May12Extreme
Jun10Extreme
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct14Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Kiomboi?

Kiomboi sits at 4.3°S, 34.4°E, 1,545 m above sea level, in Tanzania. The nearest listed city is Shelui, 22 km away.

IlongeroSingidaBasotu

Topography around Kiomboi

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

Within 3 km, the terrain around Kiomboi has only modest variations in elevation — a maximum elevation change of 108 m around an average of 1,525 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 744 m; within 80 km, large variations in elevation — a maximum elevation change of 857 m.

The land around Kiomboi is covered by cropland (51%) and grassland (33%) within 3 km, cropland (34%), shrubs (29%) and grassland (21%) within 16 km, and cropland (43%) and grassland (31%) within 80 km.

3 km
108 m
16 km
744 m
80 km
857 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Shelui 22 km · Igugunu 45 km · Igunga 54 km · Sepuka 57 km · Mtinko 62 km · Ilongero 71 km · Singida 74 km · Basotu 80 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 Kiomboi (-4.2667°, 34.3667°, elevation 1,545 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).