T’īs Isat weather in September

In September, T’īs Isat sees average daytime highs of 22°C and overnight lows near 14°C, with 248 mm of rain across 26.6 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 22% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is T’īs Isat's 9th-clearest and 12th-windiest month. For the whole year in context, see T’īs Isat's year-round climate.

Daytime high
22°
10th warmest
Overnight low
14°
5th coldest
Rainfall
248 mm
26.6 wet days
Daylight
12 h 06 min
6:22 AM – 6:26 PM
Cloud cover
56%
9th clearest
Wind
5 km/h
12th windiest
Solar energy
5.65 kWh/m²
Travel score
4.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in T’īs Isat reaches about 22°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 24°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12214
22214
32214
42214
52214
62214
72214
82214
92214
102214
112214
122214
132214
142214
152214
162314
172314
182314
192314
202314
212314
222314
232314
242314
252314
262314
272314
282314
292314
302314

T’īs Isat weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 14°30.711.48.7
Feb27° / 15°40.911.68.2
Mar28° / 16°163.111.97.5
Apr28° / 17°265.812.26.9
May26° / 17°1021512.56.0
Jun24° / 15°28426.112.74.3
Jul21° / 15°52130.912.63.4
Aug21° / 15°52430.912.43.4
Sep22° / 14°24826.612.14.3
Oct24° / 14°5811.311.77.1
Nov24° / 13°153.511.58.6
Dec25° / 13°4111.38.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 41% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23763
33961
44159
54357
64654
74852
85149
95248
105545
115842
126040
136238
146535
156634
166832
176931
187129
197228
207327
217426
227525
237525
247624
257624
267624
277624
287624
297723
307723

Chance of precipitation in September

Any precipitation

T’īs Isat gets around 248 mm of rain over 26.6 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 87% and peaks near 99% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
199
299
399
499
599
699
798
898
997
1097
1196
1295
1394
1493
1592
1691
1789
1888
1986
2084
2182
2281
2378
2476
2574
2672
2770
2867
2965
3063

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 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
10964
20964
30964
40964
50964
60964
70964
80964
90964
100964
110964
120964
131963
141963
151963
161963
171963
181963
192953
202953
212953
223943
233943
244933
255923
265923
276913
287912
298902
3010882

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over September. Sunrise moves from 6:23 AM to 6:22 AM, and sunset from 6:36 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:236:36
212.26:236:35
312.26:236:35
412.26:236:34
512.26:236:33
612.26:236:33
712.26:226:32
812.16:226:31
912.16:226:31
1012.16:226:30
1112.16:226:29
1212.16:226:29
1312.16:226:28
1412.16:226:27
1512.16:226:27
1612.16:226:26
1712.16:226:25
1812.06:226:24
1912.06:226:24
2012.06:226:23
2112.06:226:22
2212.06:226:22
2312.06:226:21
2412.06:226:20
2512.06:226:20
2612.06:226:19
2711.96:226:18
2811.96:226:18
2911.96:226:17
3011.96:226:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.65 kWh/m².

For context, solar energy here swings from a low near 4.4 kWh/m² to a high of 6.71 kWh/m² in April across the year — September's 5.65 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.4Bright
75.4Bright
85.4Bright
95.5Bright
105.5Bright
115.5Bright
125.6Bright
135.6Bright
145.6Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for T’īs Isat

In seasonPeak

In September, T’īs Isat sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

T’īs Isat's monsoon runs June–September, 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 T’īs Isat?

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

4.3
Sightseeing
9th-best month of the year
3.2
Beach & pool
10th-best month of the year

September is a reasonable time to visit T’īs Isat for sightseeing.

What to pack for T’īs Isat in September

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

In September, T’īs Isat sees daytime highs around 22°C and nights near 14°C. Pack rain gear. Worth having: light clothes and sun protection. About 27 days see rain.

rain gearlight clothessun protection

UV index in T’īs Isat 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 T’īs Isat peaks around March 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 21UV 15Dec 11UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar15Extreme
Apr15Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct13Extreme
Nov10Extreme
Dec10Very high

Air quality in T’īs Isat 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 T’īs Isat is worst in October — around 41 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorOct 2241 µg/m³Aug 927 µg/m³
PM2.5 (µg/m³)Level
Jan37Poor
Feb37Poor
Mar35Moderate
Apr32Moderate
May28Moderate
Jun32Moderate
Jul27Moderate
Aug27Moderate
Sep36Poor
Oct41Poor
Nov41Poor
Dec39Poor
Location & terrain

Where is T’īs Isat?

T’īs Isat sits at 11.5°N, 37.6°E, 1,645 m above sea level, in Ethiopia. The nearest listed city is Bahir Dar, 24 km away.

Topography around T’īs Isat

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of T’īs Isat.

Within 3 km, the terrain around T’īs Isat has significant variations in elevation — a maximum elevation change of 333 m around an average of 1,655 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,049 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,849 m.

The land around T’īs Isat is covered by cropland (78%) within 3 km, cropland (70%) within 16 km, and cropland (71%) within 80 km.

3 km
333 m
16 km
1,049 m
80 km
2,849 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Bahir Dar 24 km · Ādēt 26 km · Mer’āwī 46 km · Werota 50 km · Mot’a 54 km · Debre Tabor 62 km · Gurbetē 70 km · Ādīs Zemen 74 km

Ethiopia travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type C / E / F / L
220 V · 50 Hz
Prices
≈ 37% of US
price level, 2025
GDP per capita
$933
2025
Happiness
4.0 / 10
World Happiness, 2025
Safe drinking water
14%
of population, 2024
Homicide rate
8.5
per 100k, 2012
Road deaths
28.2
per 100k/yr, 2019
Income group
Low
World Bank
English
Low
EF EPI 499
Religion
Ethiopian Orthodox 44%Muslim 31%Protestant 23%other 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 T’īs Isat (11.4833°, 37.5833°, elevation 1,645 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).