Sirari weather in September

In September, Sirari sees average daytime highs of 28°C and overnight lows near 17°C, with 58 mm of rain across 10 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 28°C through the month. The sky is clear or mostly clear about 15% of the time in September, and the air most often feels comfortable.

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 Sirari's 4th-clearest and 1st-windiest month. For the whole year in context, see Sirari's year-round climate.

Daytime high
28°
2nd warmest
Overnight low
17°
7th coldest
Rainfall
58 mm
10 wet days
Daylight
12 hours
6:37 AM – 6:36 PM
Cloud cover
64%
4th clearest
Wind
8 km/h
1st windiest
Solar energy
6.04 kWh/m²
Travel score
5.9
out of 10

Sirari is town and ward in Mara Region, Tanzania.

Density
3,613/km²
people per km²

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 28°C through the month.

A typical September day in Sirari reaches about 28°C in the afternoon and slips back to 17°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12717
22717
32717
42817
52817
62817
72817
82817
92817
102817
112817
122817
132817
142817
152817
162817
172817
182817
192817
202817
212817
222817
232817
242817
252817
262817
272817
282917
292917
302917

Sirari 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
Jan27° / 17°13518.612.15.2
Feb28° / 17°10015.3125.3
Mar28° / 17°15619.8124.9
Apr27° / 17°18920.8124.6
May26° / 17°10516.211.95.6
Jun26° / 17°428.411.96.6
Jul27° / 16°245.611.97.0
Aug27° / 17°448.6126.5
Sep28° / 17°5810125.9
Oct28° / 17°10414.1125.2
Nov27° / 17°20720.412.14.7
Dec26° / 17°18722.312.14.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 30% of September, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24654
34753
44852
54852
64852
74852
84852
94951
104951
114852
124951
134951
144852
154852
164852
174852
184753
194654
204555
214456
224357
234258
244258
254060
264060
273862
283862
293763
303664

Chance of precipitation in September

Any precipitation

Sirari gets around 58 mm of rain over 10 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 33% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
236
336
436
535
635
735
835
934
1034
1133
1233
1332
1432
1532
1631
1731
1831
1931
2031
2132
2232
2332
2433
2533
2634
2734
2835
2935
3035

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 43% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1443916
2443917
3444017
4444016
5444016
6434016
7434116
8434116
9434116
10434116
11434116
12434215
13434215
14434215
15434315
16434314
17424414
18424414
19414414
20414515
21404515
22394615
23384616
24374616
25374717
26364717
27354717
28354818
29344818
30334818

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:43 AM to 6:31 AM, and sunset from 6:41 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:436:41
212.06:426:41
312.06:426:40
412.06:416:40
512.06:416:40
612.06:416:40
712.06:406:39
812.06:406:39
912.06:396:39
1012.06:396:38
1112.06:396:38
1212.06:386:38
1312.06:386:37
1412.06:376:37
1512.06:376:37
1612.06:376:36
1712.06:366:36
1812.06:366:36
1912.06:356:35
2012.06:356:35
2112.06:356:35
2212.06:346:34
2312.06:346:34
2412.06:336:34
2512.06:336:33
2612.06:336:33
2712.06:326:33
2812.06:326:32
2912.06:316:32
3012.06:316:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.04 kWh/m².

For context, solar energy here swings from a low near 5.27 kWh/m² to a high of 6.37 kWh/m² in February across the year — September's 6.04 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
116.0Bright
126.0Bright
136.0Intense
146.0Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.1Intense
306.1Intense
Planning a trip in September

Is September a good time to visit Sirari?

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

5.9
Sightseeing
4th-best month of the year
6.6
Beach & pool
3rd-best month of the year

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

What to pack for Sirari in September

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

In September, Sirari sees daytime highs around 28°C and nights near 17°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

UV index in Sirari 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 Sirari 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
Jan15Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May12Extreme
Jun10Very high
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct14Extreme
Nov13Extreme
Dec12Extreme

Air quality in Sirari 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 Sirari is worst in July — around 46 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (October, 28 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateJul 1545 µg/m³Oct 2328 µg/m³
PM2.5 (µg/m³)Level
Jan31Moderate
Feb28Moderate
Mar30Moderate
Apr29Moderate
May31Moderate
Jun39Poor
Jul46Poor
Aug35Moderate
Sep31Moderate
Oct28Moderate
Nov28Moderate
Dec28Moderate
Location & terrain

Where is Sirari?

Sirari sits at 1.3°S, 34.5°E, 1,679 m above sea level, in Tanzania. The nearest listed city is Isebania, 3.0 km away.

Topography around Sirari

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

Within 3 km, the terrain around Sirari has only modest variations in elevation — a maximum elevation change of 188 m around an average of 1,606 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 531 m; within 80 km, large variations in elevation — a maximum elevation change of 1,107 m.

The land around Sirari is covered by cropland (37%) and trees (30%) within 3 km, cropland (51%) and trees (20%) within 16 km, and grassland (37%) and shrubs (20%) within 80 km.

3 km
188 m
16 km
531 m
80 km
1,107 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Isebania 3.0 km · Tarime 16 km · Kihancha 17 km · Migori 21 km · Matongo 24 km · Awendo 39 km · Shirati 56 km · Rongo 57 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 Sirari (-1.2537°, 34.476°, elevation 1,679 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).