Boriziny weather in September

In September, Boriziny sees average daytime highs of 33°C and overnight lows near 21°C, with 2 mm of rain across 0.6 wet days and about 11.9 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 32°C in the first days to 34°C by the end. The sky is clear or mostly clear about 82% of the time in September, and the air most often feels comfortable.

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 Boriziny's 1st-clearest and 2nd-windiest month. For the whole year in context, see Boriziny's year-round climate.

Daytime high
33°
5th warmest
Overnight low
21°
4th coldest
Rainfall
2 mm
0.6 wet days
Daylight
11 h 54 min
5:46 AM – 5:41 PM
Cloud cover
21%
1st clearest
Wind
17 km/h
2nd windiest
Solar energy
6.53 kWh/m²
Travel score
4.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 32°C in the first days to 34°C by the end.

A typical September day in Boriziny reaches about 33°C in the afternoon and slips back to 21°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13220
23220
33220
43220
53220
63320
73320
83320
93321
103321
113321
123321
133321
143321
153321
163321
173321
183321
193321
203421
213421
223421
233421
243421
253421
263421
273421
283422
293422
303422

How September really feels in Boriziny

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Boriziny weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°4722712.82.4
Feb32° / 24°34424.212.52.5
Mar33° / 24°21719.112.12.8
Apr34° / 24°366.511.73.6
May33° / 22°91.611.34.6
Jun31° / 21°20.411.15.7
Jul31° / 20°10.311.26.1
Aug32° / 20°20.311.55.6
Sep33° / 21°20.611.94.6
Oct35° / 23°214.312.43.2
Nov35° / 24°10212.112.72.4
Dec34° / 24°25622.412.92.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 82% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 7%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1937
2937
3937
4937
5937
6937
7928
8928
9928
10928
11928
12937
13937
14937
15937
16937
17937
18937
19937
20946
21946
22946
23946
24946
25946
26955
27964
28964
29964
30964

Chance of precipitation in September

Any precipitation

Boriziny gets around 2 mm of rain over 0.6 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 2% and peaks near 5% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
62
72
82
92
101
111
121
131
141
151
161
171
181
192
202
212
222
232
242
253
263
274
284
295
305

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 65% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
115691330
214691430
314691430
414681530
513681630
613671730
712681730
811681830
911681830
1010681930
119691930
129682030
138682130
148682130
158672230
167682230
177662340
187662340
197662340
207652440
216652450
226642550
236642550
246622660
256602671
265612671
275592781
285592781
295572891
3055628101

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
118light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

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 5:58 AM to 5:35 AM, and sunset from 5:40 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:585:40
211.75:575:40
311.75:575:40
411.75:565:40
511.85:555:40
611.85:545:40
711.85:545:40
811.85:535:40
911.85:525:41
1011.85:515:41
1111.85:505:41
1211.95:505:41
1311.95:495:41
1411.95:485:41
1511.95:475:41
1611.95:465:41
1711.95:455:41
1811.95:455:41
1912.05:445:41
2012.05:435:41
2112.05:425:41
2212.05:415:42
2312.05:415:42
2412.05:405:42
2512.05:395:42
2612.15:385:42
2712.15:375:42
2812.15:375:42
2912.15:365:42
3012.15:355:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.53 kWh/m².

For context, solar energy here swings from a low near 4.69 kWh/m² to a high of 7.12 kWh/m² in October across the year — September's 6.53 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.1Intense
36.1Intense
46.1Intense
56.2Intense
66.2Intense
76.2Intense
86.3Intense
96.3Intense
106.3Intense
116.4Intense
126.4Intense
136.5Intense
146.5Intense
156.5Intense
166.6Intense
176.6Intense
186.6Intense
196.7Intense
206.7Intense
216.7Intense
226.7Intense
236.8Intense
246.8Intense
256.8Intense
266.8Intense
276.8Intense
286.9Intense
296.9Intense
306.9Intense
Planning a trip in September

Hazard calendar for Boriziny

In seasonPeak

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

Boriziny'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 Boriziny?

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

4.6
Sightseeing
4th-best month of the year
8.1
Beach & pool
4th-best month of the year

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

What to pack for Boriziny in September

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

In September, Boriziny sees daytime highs around 33°C and nights near 21°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Boriziny in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Boriziny peaks around February 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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 highExtremeFeb 10UV 15Jun 19UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov12Extreme
Dec14Extreme

Air quality in Boriziny 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 Boriziny is worst in November — around 21 µg/m³ PM2.5 (moderate), about 5.3× the cleanest month (July, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateNov 1620 µg/m³Jul 154 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar6Good
Apr5Good
May5Good
Jun4Good
Jul4Good
Aug5Good
Sep6Good
Oct12Good
Nov21Moderate
Dec12Good
Location & terrain

Where is Boriziny?

Boriziny sits at 15.6°S, 47.7°E, 22 m above sea level, in Madagascar. The nearest listed city is Mampikony, 60 km away.

BefandrianaMarovoayTsaratananaAmbato BoenyMahajangaMaromandia

Topography around Boriziny

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

Within 3 km, the terrain around Boriziny has only modest variations in elevation — a maximum elevation change of 69 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 306 m; within 80 km, large variations in elevation — a maximum elevation change of 1,122 m.

The land around Boriziny is covered by cropland (49%) and grassland (33%) within 3 km, grassland (53%) and trees (24%) within 16 km, and grassland (61%) and trees (25%) within 80 km.

3 km
69 m
16 km
306 m
80 km
1,122 m
treesshrubsgrasslandcroplandwatermangroves
September weather nearby: Mampikony 60 km · Antsohihy 82 km · Befandriana 99 km · Marovoay 126 km · Tsaratanana 139 km · Ambato Boeny 144 km · Mahajanga 146 km · Maromandia 155 km

Madagascar travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$599
2025
Happiness
4.2 / 10
World Happiness, 2025
Safe drinking water
22%
of population, 2024
Road deaths
29.2
per 100k/yr, 2019
Income group
Low
World Bank
English
Low
EF EPI 457
Religion
Church of Jesus Christ in Madagascar/Malagasy Lutheran Church/Anglican Church 34%Roman Catholic 32%none 22%other Christian 8%

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 Boriziny (-15.55°, 47.6667°, elevation 22 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).