Rwiimi weather in September

In September, Rwiimi sees average daytime highs of 25°C and overnight lows near 15°C, with 182 mm of rain across 24 wet days and about 12 hours of daylight. It is the 4th-warmest and 6th-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 3% 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 Rwiimi's 8th-clearest and 10th-windiest month. For the whole year in context, see Rwiimi's year-round climate.

Daytime high
25°
4th warmest
Overnight low
15°
5th coldest
Rainfall
182 mm
24 wet days
Daylight
12 hours
6:53 AM – 6:53 PM
Cloud cover
77%
8th clearest
Wind
4 km/h
10th windiest
Solar energy
5.55 kWh/m²
Travel score
4.5
out of 10

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 Rwiimi reaches about 25°C in the afternoon and slips back to 15°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 26°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12415
22415
32415
42415
52415
62415
72415
82415
92415
102515
112515
122515
132515
142515
152515
162515
172515
182515
192515
202515
212515
222515
232515
242515
252515
262515
272515
282515
292515
302515

Rwiimi weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 15°7811.8126.3
Feb26° / 15°8811.6126.0
Mar25° / 15°20322.3124.7
Apr25° / 16°23925.9124.1
May24° / 15°21023.4124.7
Jun25° / 15°13815.6125.7
Jul24° / 14°9114.1126.1
Aug24° / 15°16020.5125.1
Sep25° / 15°18224124.5
Oct24° / 15°24328.1123.9
Nov23° / 15°26427.8123.8
Dec24° / 14°14118.8125.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% 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 82%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12179
22179
32179
42179
52080
62179
72179
82179
92278
102278
112278
122278
132278
142278
152179
162179
172080
182080
191981
201882
211783
221684
231585
241585
251486
261387
271387
281189
291189
301189

Chance of precipitation in September

Any precipitation

Rwiimi gets around 182 mm of rain over 24 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 79% and peaks near 86% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
175
276
376
477
577
677
778
878
978
1078
1178
1278
1378
1477
1578
1678
1778
1878
1979
2079
2180
2280
2381
2482
2583
2683
2784
2885
2985
3086

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 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
115805
214815
314815
413825
513825
613825
713825
813825
913825
1013825
1113825
1213834
1314824
1414824
1514824
1614824
1714815
1814815
1913825
2013825
2112835
2212826
2311836
2411836
2510846
269847
279847
288857
298848
307858

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 6:59 AM to 6:48 AM, and sunset from 6:59 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:596:59
212.06:586:59
312.06:586:58
412.06:586:58
512.06:576:58
612.06:576:57
712.06:576:57
812.06:566:56
912.06:566:56
1012.06:566:56
1112.06:556:55
1212.06:556:55
1312.06:546:55
1412.06:546:54
1512.06:546:54
1612.06:536:53
1712.06:536:53
1812.06:536:53
1912.06:526:52
2012.06:526:52
2112.06:526:52
2212.06:516:51
2312.06:516:51
2412.06:506:50
2512.06:506:50
2612.06:506:50
2712.06:496:49
2812.06:496:49
2912.06:496:49
3012.06:486:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.55 kWh/m².

For context, solar energy here swings from a low near 5.02 kWh/m² to a high of 5.87 kWh/m² in February across the year — September's 5.55 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in September

Is September a good time to visit Rwiimi?

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

4.5
Sightseeing
9th-best month of the year
4.0
Beach & pool
9th-best month of the year

September is a reasonable time to visit Rwiimi for sightseeing.

What to pack for Rwiimi in September

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

In September, Rwiimi sees daytime highs around 25°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 24 days see rain.

rain gearlight clothessun protection

UV index in Rwiimi 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 Rwiimi peaks around March 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 18UV 15Jun 21UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct14Extreme
Nov12Extreme
Dec11Extreme

Air quality in Rwiimi 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 Rwiimi is worst in February — around 66 µg/m³ PM2.5 (unhealthy), about 2.6× the cleanest month (April, 26 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorModeratePoorFeb 966 µg/m³Apr 2226 µg/m³
PM2.5 (µg/m³)Level
Jan64Unhealthy
Feb66Unhealthy
Mar39Poor
Apr26Moderate
May27Moderate
Jun35Poor
Jul42Poor
Aug33Moderate
Sep28Moderate
Oct26Moderate
Nov28Moderate
Dec44Poor
Location & terrain

Where is Rwiimi?

Rwiimi sits at 0.4°N, 30.2°E, 1,111 m above sea level, in Uganda. The nearest listed city is Buhesi, 23 km away.

BundibugyoNyahukaRwamwanja Refugee CampKasozi

Topography around Rwiimi

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

Within 3 km, the terrain around Rwiimi has significant variations in elevation — a maximum elevation change of 251 m around an average of 1,104 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,206 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,373 m.

The land around Rwiimi is covered by trees (40%) and cropland (30%) within 3 km, trees (59%) within 16 km, and trees (59%) and grassland (27%) within 80 km.

3 km
251 m
16 km
1,206 m
80 km
4,373 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Buhesi 23 km · Kasese 27 km · Fort Portal 32 km · Kamwenge 33 km · Bundibugyo 41 km · Nyahuka 42 km · Rwamwanja Refugee Camp 47 km · Kasozi 50 km

Uganda travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type G
240 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$1,206
2025
Happiness
4.5 / 10
World Happiness, 2025
Safe drinking water
18%
of population, 2024
Homicide rate
9
per 100k, 2023
Road deaths
29.4
per 100k/yr, 2019
Income group
Low
World Bank
English
Moderate
EF EPI 518
Religion
Protestant 45%Roman Catholic 39%Muslim 14%other 2%

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 Rwiimi (0.3796°, 30.2304°, elevation 1,111 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).