Blantyre weather in September

In September, Blantyre sees average daytime highs of 28°C and overnight lows near 16°C, with 9 mm of rain across 2.2 wet days and about 11.9 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 30°C by the end. The sky is clear or mostly clear about 62% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Blantyre's 1st-clearest and 2nd-windiest month. For the whole year in context, see Blantyre's year-round climate.

Daytime high
28°
4th warmest
Overnight low
16°
5th coldest
Rainfall
9 mm
2.2 wet days
Daylight
11 h 54 min
5:37 AM – 5:32 PM
Cloud cover
32%
1st clearest
Wind
9 km/h
2nd windiest
Solar energy
6.09 kWh/m²
Travel score
7.3
out of 10

Blantyre is city in Malawi.

Founded
1876

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 30°C by the end.

A typical September day in Blantyre reaches about 28°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 31°C. Set against its neighbours, September runs about 3°C warmer than August and about 2°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12715
22715
32715
42715
52715
62715
72716
82816
92816
102816
112816
122816
132816
142816
152816
162917
172917
182917
192917
202917
212917
222917
232917
242917
252918
263018
273018
283018
293018
303018

Blantyre weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 21°32125.812.84.0
Feb27° / 20°20119.812.54.5
Mar27° / 20°16619.112.15.1
Apr26° / 18°5010.511.76.7
May25° / 15°144.311.38.1
Jun23° / 13°114.111.18.1
Jul23° / 13°145.211.27.9
Aug25° / 14°72.311.58.4
Sep28° / 16°92.211.97.3
Oct30° / 19°294.712.45.7
Nov31° / 21°9012.312.74.5
Dec29° / 21°22522.812.93.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 62% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 16%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18119
28218
38218
48218
58218
68317
78317
88218
98317
108317
118317
128416
138416
148416
158416
168416
178416
188416
198416
208515
218515
228515
238515
248515
258515
268416
278416
288416
298317
308317

Chance of precipitation in September

Any precipitation

Blantyre gets around 9 mm of rain over 2.2 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 8% and peaks near 9% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
16
26
36
46
57
67
77
87
98
108
118
128
138
148
158
168
178
188
197
207
217
227
237
248
258
268
278
288
299
309

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 56% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1682840
2682840
3682840
4672940
5663040
6653050
7643150
8633250
9633250
10613360
11613360
12603460
13603460
14593560
15583660
16573760
17553870
18543970
19543970
20534070
21514180
22514180
23494290
24474390
254644100
264444111
274344121
284245131
294145131
304045141

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 5:49 AM to 5:26 AM, and sunset from 5:30 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:495:30
211.75:485:30
311.75:475:31
411.75:475:31
511.75:465:31
611.85:455:31
711.85:445:31
811.85:435:31
911.85:435:31
1011.85:425:31
1111.85:415:31
1211.95:405:31
1311.95:395:31
1411.95:395:32
1511.95:385:32
1611.95:375:32
1711.95:365:32
1811.95:355:32
1912.05:345:32
2012.05:345:32
2112.05:335:32
2212.05:325:32
2312.05:315:32
2412.05:305:32
2512.05:305:32
2612.15:295:33
2712.15:285:33
2812.15:275:33
2912.15:265:33
3012.15:265:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.09 kWh/m².

For context, solar energy here swings from a low near 4.15 kWh/m² to a high of 6.44 kWh/m² in October across the year — September's 6.09 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.8Bright
65.8Bright
75.8Bright
85.9Bright
95.9Bright
105.9Bright
116.0Bright
126.0Bright
136.0Intense
146.0Intense
156.1Intense
166.1Intense
176.1Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Blantyre

In seasonPeak

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

Blantyre's monsoon runs December–March, 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 Blantyre?

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

7.3
Sightseeing
5th-best month of the year
8.5
Beach & pool
1st-best month of the year

September is one of the better times to visit Blantyre for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Blantyre in September

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

In September, Blantyre sees daytime highs around 28°C and nights near 16°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Blantyre in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Blantyre peaks around January 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 16UV 15Jun 21UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep11Extreme
Oct13Extreme
Nov13Extreme
Dec15Extreme

Air quality in Blantyre 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 Blantyre is worst in September — around 65 µg/m³ PM2.5 (unhealthy), about 3.1× the cleanest month (January, 21 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateSep 1064 µg/m³Jan 1321 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb27Moderate
Mar31Moderate
Apr37Poor
May51Poor
Jun55Poor
Jul59Unhealthy
Aug62Unhealthy
Sep65Unhealthy
Oct43Poor
Nov27Moderate
Dec23Moderate
Location & terrain

Where is Blantyre?

Blantyre sits at 15.8°S, 35.0°E, 1,041 m above sea level, in Malawi. The nearest listed city is Zomba, 55 km away.

ZombaMwanzaMulanjeLiwondeMilangeBalakaNtcheuNsanje

Topography around Blantyre

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

Within 3 km, the terrain around Blantyre has significant variations in elevation — a maximum elevation change of 284 m around an average of 1,035 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,235 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,911 m.

The land around Blantyre is covered by artificial surfaces (43%) and trees (41%) within 3 km, cropland (37%), trees (20%) and shrubs (20%) within 16 km, and cropland (40%) and shrubs (24%) within 80 km.

3 km
284 m
16 km
1,235 m
80 km
2,911 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Zomba 55 km · Mwanza 56 km · Mulanje 59 km · Liwonde 83 km · Milange 89 km · Balaka 90 km · Ntcheu 114 km · Nsanje 129 km

Malawi travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type G
230 V · 50 Hz
Prices
≈ 53% of US
price level, 2025
GDP per capita
$672
2025
Happiness
3.3 / 10
World Happiness, 2025
Safe drinking water
18%
of population, 2024
Homicide rate
1.8
per 100k, 2012
Road deaths
33.4
per 100k/yr, 2019
Income group
Low
World Bank
English
Low
EF EPI 465
Religion
Protestant 34%other Christian 27%Roman Catholic 17%Muslim 14%

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 Blantyre (-15.785°, 35.0085°, elevation 1,041 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).