Karusi weather in September

In September, Karusi sees average daytime highs of 27°C and overnight lows near 17°C, with 52 mm of rain across 7.2 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 27°C through the month. The sky is clear or mostly clear about 11% 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 Karusi's 4th-clearest and 4th-windiest month. For the whole year in context, see Karusi's year-round climate.

Daytime high: 27°; 1st warmest
Overnight low: 17°; 12th coldest
Rainfall: 52 mm; 7.2 wet days
Daylight: 12 hours; 5:54 AM – 5:53 PM
Cloud cover: 69%; 4th clearest
Wind: 7 km/h; 4th windiest
Solar energy: 5.87 kWh/m²
Travel score: 6.6; out of 10

Karusi is human settlement.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Karusi year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Karusi reaches about 27°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 25°C and 29°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27
Avg low (°C)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17

	Avg high (°C)	Avg low (°C)
1	27	17
2	27	17
3	27	17
4	27	17
5	27	17
6	27	17
7	27	17
8	27	17
9	27	17
10	27	17
11	27	17
12	27	17
13	27	17
14	27	17
15	27	17
16	27	17
17	27	17
18	27	17
19	27	17
20	27	17
21	27	17
22	27	17
23	27	17
24	27	17
25	27	17
26	27	17
27	27	17
28	27	17
29	27	17
30	27	17

Karusi 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.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	25° / 16°	201	23.3	12.2	4.6
Feb	26° / 16°	178	21.4	12.1	4.5
Mar	25° / 16°	217	26.3	12	4.2
Apr	24° / 16°	210	25.3	11.9	4.2
May	25° / 16°	88	13.2	11.9	6.3
Jun	25° / 15°	9	2	11.8	7.8
Jul	26° / 15°	3	0.7	11.8	8.0
Aug	27° / 16°	17	2.5	11.9	7.4
Sep	27° / 17°	52	7.2	12	6.6
Oct	26° / 16°	161	17.9	12.1	5.3
Nov	25° / 16°	247	25.8	12.1	4.1
Dec	25° / 15°	242	25.9	12.2	4.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 69%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	32	31	31	31	32	31	31	31	31	31	31	31	31	31	31	32	32	32	32	32	31	32	32	32	31	30	30	30	30	30
Cloudier (%)	68	69	69	69	68	69	69	69	69	69	69	69	69	69	69	68	68	68	68	68	69	68	68	68	69	70	70	70	70	70

	Clearer (%)	Cloudier (%)
1	32	68
2	31	69
3	31	69
4	31	69
5	32	68
6	31	69
7	31	69
8	31	69
9	31	69
10	31	69
11	31	69
12	31	69
13	31	69
14	31	69
15	31	69
16	32	68
17	32	68
18	32	68
19	32	68
20	32	68
21	31	69
22	32	68
23	32	68
24	32	68
25	31	69
26	30	70
27	30	70
28	30	70
29	30	70
30	30	70

Chance of precipitation in September

Any precipitation

Karusi gets around 52 mm of rain over 7.2 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 25% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	16	16	17	18	18	19	19	20	20	21	22	22	23	23	23	24	24	25	25	26	27	28	29	30	31	32	33	34	35	36

	Rain chance (%)
1	16
2	16
3	17
4	18
5	18
6	19
7	19
8	20
9	20
10	21
11	22
12	22
13	23
14	23
15	23
16	24
17	24
18	25
19	25
20	26
21	27
22	28
23	29
24	30
25	31
26	32
27	33
28	34
29	35
30	36

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 52% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	67	66	64	63	62	61	59	59	57	57	56	55	54	54	54	53	53	53	52	50	49	48	46	45	43	41	40	38	36	34
Comfortable (%)	28	29	30	31	32	33	34	34	35	35	35	36	36	35	35	35	34	34	34	35	35	35	36	37	38	39	40	41	42	44
Humid (%)	5	5	6	6	6	6	7	7	8	8	9	9	10	11	11	12	13	13	14	15	16	17	18	19	19	20	21	21	22	23

	Dry (%)	Comfortable (%)	Humid (%)
1	67	28	5
2	66	29	5
3	64	30	6
4	63	31	6
5	62	32	6
6	61	33	6
7	59	34	7
8	59	34	7
9	57	35	8
10	57	35	8
11	56	35	9
12	55	36	9
13	54	36	10
14	54	35	11
15	54	35	11
16	53	35	12
17	53	34	13
18	53	34	13
19	52	34	14
20	50	35	15
21	49	35	16
22	48	35	17
23	46	36	18
24	45	37	19
25	43	38	19
26	41	39	20
27	40	40	21
28	38	41	21
29	36	42	22
30	34	44	23

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	7	calm
2	7	calm
3	7	calm
4	7	calm
5	7	calm
6	7	calm
7	7	calm
8	7	calm
9	7	calm
10	7	calm
11	7	calm
12	7	calm
13	7	calm
14	7	calm
15	7	calm
16	7	calm
17	7	calm
18	7	calm
19	7	calm
20	7	calm
21	7	calm
22	7	calm
23	7	calm
24	7	calm
25	7	calm
26	7	calm
27	7	calm
28	7	calm
29	7	calm
30	7	calm

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 6:01 AM to 5:48 AM, and sunset from 5:57 PM to 5:49 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:01	6:00	6:00	6:00	5:59	5:59	5:58	5:58	5:57	5:57	5:56	5:56	5:56	5:55	5:55	5:54	5:54	5:53	5:53	5:52	5:52	5:51	5:51	5:51	5:50	5:50	5:49	5:49	5:48	5:48
Sunset (PM)	5:57	5:57	5:57	5:57	5:56	5:56	5:56	5:55	5:55	5:55	5:55	5:54	5:54	5:54	5:53	5:53	5:53	5:53	5:52	5:52	5:52	5:51	5:51	5:51	5:51	5:50	5:50	5:50	5:50	5:49

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	6:01	5:57
2	11.9	6:00	5:57
3	11.9	6:00	5:57
4	11.9	6:00	5:57
5	12.0	5:59	5:56
6	12.0	5:59	5:56
7	12.0	5:58	5:56
8	12.0	5:58	5:55
9	12.0	5:57	5:55
10	12.0	5:57	5:55
11	12.0	5:56	5:55
12	12.0	5:56	5:54
13	12.0	5:56	5:54
14	12.0	5:55	5:54
15	12.0	5:55	5:53
16	12.0	5:54	5:53
17	12.0	5:54	5:53
18	12.0	5:53	5:53
19	12.0	5:53	5:52
20	12.0	5:52	5:52
21	12.0	5:52	5:52
22	12.0	5:51	5:51
23	12.0	5:51	5:51
24	12.0	5:51	5:51
25	12.0	5:50	5:51
26	12.0	5:50	5:50
27	12.0	5:49	5:50
28	12.0	5:49	5:50
29	12.0	5:48	5:50
30	12.0	5:48	5:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.87 kWh/m².

For context, solar energy here swings from a low near 5.02 kWh/m² to a high of 5.96 kWh/m² in February across the year — September's 5.87 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	5.7	5.7	5.7	5.7	5.7	5.7	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.9	5.9	5.9	5.9	5.9	5.9	5.9	6.0	6.0	6.0	6.0	5.9	5.9	5.9	5.9	5.9
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.7	Bright
2	5.7	Bright
3	5.7	Bright
4	5.7	Bright
5	5.7	Bright
6	5.7	Bright
7	5.8	Bright
8	5.8	Bright
9	5.8	Bright
10	5.8	Bright
11	5.8	Bright
12	5.8	Bright
13	5.8	Bright
14	5.8	Bright
15	5.9	Bright
16	5.9	Bright
17	5.9	Bright
18	5.9	Bright
19	5.9	Bright
20	5.9	Bright
21	5.9	Bright
22	6.0	Bright
23	6.0	Bright
24	6.0	Bright
25	6.0	Bright
26	5.9	Bright
27	5.9	Bright
28	5.9	Bright
29	5.9	Bright
30	5.9	Bright

Planning a trip in September

Hazard calendar for Karusi

In seasonPeak

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

Karusi'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 Karusi?

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

6.6

Sightseeing

4th-best month of the year

6.8

Beach & pool

4th-best month of the year

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

What to pack for Karusi in September

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

In September, Karusi sees daytime highs around 27°C and nights near 17°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Karusi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Karusi peaks around March 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 10 (extreme).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	11	15	16	15	12	10	11	11	14	14	13	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	11	Extreme
Feb	15	Extreme
Mar	16	Extreme
Apr	15	Extreme
May	12	Extreme
Jun	10	Extreme
Jul	11	Extreme
Aug	11	Extreme
Sep	14	Extreme
Oct	14	Extreme
Nov	13	Extreme
Dec	12	Extreme

Air quality in Karusi 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 Karusi is worst in August — around 68 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	60	59	55	51	55	65	64	68	66	57	55	57
Level	Unhealthy	Unhealthy	Poor	Poor	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Unhealthy	Poor	Unhealthy

	PM2.5 (µg/m³)	Level
Jan	60	Unhealthy
Feb	59	Unhealthy
Mar	55	Poor
Apr	51	Poor
May	55	Unhealthy
Jun	65	Unhealthy
Jul	64	Unhealthy
Aug	68	Unhealthy
Sep	66	Unhealthy
Oct	57	Unhealthy
Nov	55	Poor
Dec	57	Unhealthy

Location & terrain

Where is Karusi?

Karusi sits at 3.1°S, 30.2°E, 1,627 m above sea level, in Burundi. The nearest listed city is Zanandore, 18 km away.

Topography around Karusi

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

Within 3 km, the terrain around Karusi has only modest variations in elevation — a maximum elevation change of 181 m around an average of 1,552 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 525 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,689 m.

The land around Karusi is covered by cropland (30%), trees (29%) and grassland (26%) within 3 km, cropland (36%), grassland (29%) and trees (23%) within 16 km, and grassland (34%) and cropland (34%) within 80 km.

3 km

181 m

cropland 30%

16 km

525 m

cropland 36%

80 km

1,689 m

grassland 34%

treesshrubsgrasslandcroplandartificial surfaceswater

← August Karusi year-round climate October →Best places to visit in September

September weather nearby: Zanandore 18 km · Ngozi 43 km · Gitega 45 km · Bugarama 48 km · Cendajuru 53 km · Kirundo 58 km · Kabanga 62 km · Kayanza 63 km

Burundi travel facts

Travel advisory: Level 3; Reconsider Travel
Power plugs: Type C / E; 220 V · 50 Hz
Prices: ≈ 34% of US; price level, 2025
GDP per capita: $234; 2025
Happiness: 3.8 / 10; World Happiness, 2020
Homicide rate: 5.6; per 100k, 2016
Road deaths: 35.5; per 100k/yr, 2019
Income group: Low; World Bank
Religion

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 Karusi (-3.1014°, 30.1628°, elevation 1,627 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).

	Avg high (°C)	Avg low (°C)
1	27	17
2	27	17
3	27	17
4	27	17
5	27	17
6	27	17
7	27	17
8	27	17
9	27	17
10	27	17
11	27	17
12	27	17
13	27	17
14	27	17
15	27	17
16	27	17
17	27	17
18	27	17
19	27	17
20	27	17
21	27	17
22	27	17
23	27	17
24	27	17
25	27	17
26	27	17
27	27	17
28	27	17
29	27	17
30	27	17

	Clearer (%)	Cloudier (%)
1	32	68
2	31	69
3	31	69
4	31	69
5	32	68
6	31	69
7	31	69
8	31	69
9	31	69
10	31	69
11	31	69
12	31	69
13	31	69
14	31	69
15	31	69
16	32	68
17	32	68
18	32	68
19	32	68
20	32	68
21	31	69
22	32	68
23	32	68
24	32	68
25	31	69
26	30	70
27	30	70
28	30	70
29	30	70
30	30	70

	Rain chance (%)
1	16
2	16
3	17
4	18
5	18
6	19
7	19
8	20
9	20
10	21
11	22
12	22
13	23
14	23
15	23
16	24
17	24
18	25
19	25
20	26
21	27
22	28
23	29
24	30
25	31
26	32
27	33
28	34
29	35
30	36

	Dry (%)	Comfortable (%)	Humid (%)
1	67	28	5
2	66	29	5
3	64	30	6
4	63	31	6
5	62	32	6
6	61	33	6
7	59	34	7
8	59	34	7
9	57	35	8
10	57	35	8
11	56	35	9
12	55	36	9
13	54	36	10
14	54	35	11
15	54	35	11
16	53	35	12
17	53	34	13
18	53	34	13
19	52	34	14
20	50	35	15
21	49	35	16
22	48	35	17
23	46	36	18
24	45	37	19
25	43	38	19
26	41	39	20
27	40	40	21
28	38	41	21
29	36	42	22
30	34	44	23

	Avg high (°C)	Avg low (°C)
1	27	17
2	27	17
3	27	17
4	27	17
5	27	17
6	27	17
7	27	17
8	27	17
9	27	17
10	27	17
11	27	17
12	27	17
13	27	17
14	27	17
15	27	17
16	27	17
17	27	17
18	27	17
19	27	17
20	27	17
21	27	17
22	27	17
23	27	17
24	27	17
25	27	17
26	27	17
27	27	17
28	27	17
29	27	17
30	27	17

	Clearer (%)	Cloudier (%)
1	32	68
2	31	69
3	31	69
4	31	69
5	32	68
6	31	69
7	31	69
8	31	69
9	31	69
10	31	69
11	31	69
12	31	69
13	31	69
14	31	69
15	31	69
16	32	68
17	32	68
18	32	68
19	32	68
20	32	68
21	31	69
22	32	68
23	32	68
24	32	68
25	31	69
26	30	70
27	30	70
28	30	70
29	30	70
30	30	70

	Rain chance (%)
1	16
2	16
3	17
4	18
5	18
6	19
7	19
8	20
9	20
10	21
11	22
12	22
13	23
14	23
15	23
16	24
17	24
18	25
19	25
20	26
21	27
22	28
23	29
24	30
25	31
26	32
27	33
28	34
29	35
30	36

	Dry (%)	Comfortable (%)	Humid (%)
1	67	28	5
2	66	29	5
3	64	30	6
4	63	31	6
5	62	32	6
6	61	33	6
7	59	34	7
8	59	34	7
9	57	35	8
10	57	35	8
11	56	35	9
12	55	36	9
13	54	36	10
14	54	35	11
15	54	35	11
16	53	35	12
17	53	34	13
18	53	34	13
19	52	34	14
20	50	35	15
21	49	35	16
22	48	35	17
23	46	36	18
24	45	37	19
25	43	38	19
26	41	39	20
27	40	40	21
28	38	41	21
29	36	42	22
30	34	44	23

	Avg high (°C)	Avg low (°C)
1	27	17
2	27	17
3	27	17
4	27	17
5	27	17
6	27	17
7	27	17
8	27	17
9	27	17
10	27	17
11	27	17
12	27	17
13	27	17
14	27	17
15	27	17
16	27	17
17	27	17
18	27	17
19	27	17
20	27	17
21	27	17
22	27	17
23	27	17
24	27	17
25	27	17
26	27	17
27	27	17
28	27	17
29	27	17
30	27	17

	Clearer (%)	Cloudier (%)
1	32	68
2	31	69
3	31	69
4	31	69
5	32	68
6	31	69
7	31	69
8	31	69
9	31	69
10	31	69
11	31	69
12	31	69
13	31	69
14	31	69
15	31	69
16	32	68
17	32	68
18	32	68
19	32	68
20	32	68
21	31	69
22	32	68
23	32	68
24	32	68
25	31	69
26	30	70
27	30	70
28	30	70
29	30	70
30	30	70

	Rain chance (%)
1	16
2	16
3	17
4	18
5	18
6	19
7	19
8	20
9	20
10	21
11	22
12	22
13	23
14	23
15	23
16	24
17	24
18	25
19	25
20	26
21	27
22	28
23	29
24	30
25	31
26	32
27	33
28	34
29	35
30	36

	Dry (%)	Comfortable (%)	Humid (%)
1	67	28	5
2	66	29	5
3	64	30	6
4	63	31	6
5	62	32	6
6	61	33	6
7	59	34	7
8	59	34	7
9	57	35	8
10	57	35	8
11	56	35	9
12	55	36	9
13	54	36	10
14	54	35	11
15	54	35	11
16	53	35	12
17	53	34	13
18	53	34	13
19	52	34	14
20	50	35	15
21	49	35	16
22	48	35	17
23	46	36	18
24	45	37	19
25	43	38	19
26	41	39	20
27	40	40	21
28	38	41	21
29	36	42	22
30	34	44	23