Imerintsiatosika weather in September

In September, Imerintsiatosika sees average daytime highs of 24°C and overnight lows near 11°C, with 7 mm of rain across 1.7 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 23°C in the first days to 25°C by the end. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Imerintsiatosika's 1st-clearest and 3rd-windiest month. For the whole year in context, see Imerintsiatosika's year-round climate.

Daytime high
24°
8th warmest
Overnight low
11°
4th coldest
Rainfall
7 mm
1.7 wet days
Daylight
11 h 54 min
5:48 AM – 5:42 PM
Cloud cover
34%
1st clearest
Wind
12 km/h
3rd windiest
Solar energy
6.14 kWh/m²
Travel score
8.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 23°C in the first days to 25°C by the end.

A typical September day in Imerintsiatosika reaches about 24°C in the afternoon and slips back to 11°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 27°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°151015202530
Avg high (°C)Avg low (°C)
12211
22311
32311
42311
52311
62311
72311
82311
92311
102311
112411
122411
132411
142411
152411
162411
172411
182411
192511
202512
212512
222512
232512
242512
252512
262512
272512
282512
292512
302512

Imerintsiatosika weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°30521.9134.7
Feb26° / 17°27019.312.64.9
Mar26° / 17°14715.212.15.8
Apr25° / 15°387.511.67.4
May23° / 13°152.911.18.1
Jun21° / 10°40.810.98.1
Jul20° / 10°41117.9
Aug21° / 10°40.911.48.4
Sep24° / 11°71.711.98.7
Oct26° / 13°456.812.47.5
Nov27° / 15°11112.112.96.3
Dec26° / 17°2121813.15.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 22%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27525
37525
47624
57624
67624
77723
87723
97822
107822
118020
128020
138020
148119
158020
168020
178020
188020
198020
208020
218020
228020
237921
247921
257822
267822
277723
287723
297723
307624

Chance of precipitation in September

Any precipitation

Imerintsiatosika gets around 7 mm of rain over 1.7 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 6% and peaks near 11% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
13
23
33
43
53
64
74
84
94
104
114
125
135
146
156
166
177
187
197
207
218
228
238
249
259
269
2710
2810
2911
3011

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 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1991
2991
3982
4982
5982
6982
7973
8973
9973
10973
11964
12964
13964
14955
15955
16946
17946
18946
19937
20937
21937
22928
23928
24919
25919
269010
278911
288911
298812
308713

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 6:02 AM to 5:35 AM, and sunset from 5:39 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:025:39
211.66:015:39
311.76:005:39
411.75:595:40
511.75:585:40
611.75:575:40
711.75:565:40
811.75:565:40
911.85:555:41
1011.85:545:41
1111.85:535:41
1211.85:525:41
1311.85:515:41
1411.95:505:42
1511.95:495:42
1611.95:485:42
1711.95:475:42
1811.95:465:42
1911.95:455:42
2012.05:455:43
2112.05:445:43
2212.05:435:43
2312.05:425:43
2412.05:415:43
2512.15:405:44
2612.15:395:44
2712.15:385:44
2812.15:375:44
2912.15:365:44
3012.25:355:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.14 kWh/m².

For context, solar energy here swings from a low near 4.11 kWh/m² to a high of 6.77 kWh/m² in November across the year — September's 6.14 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.7Bright
55.7Bright
65.8Bright
75.8Bright
85.9Bright
95.9Bright
106.0Bright
116.0Intense
126.0Intense
136.1Intense
146.1Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.4Intense
246.4Intense
256.4Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Imerintsiatosika

In seasonPeak

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

Imerintsiatosika'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 Imerintsiatosika?

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

8.7
Sightseeing
1st-best month of the year
7.2
Beach & pool
1st-best month of the year

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

What to pack for Imerintsiatosika in September

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

In September, Imerintsiatosika sees daytime highs around 24°C and nights near 11°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

UV index in Imerintsiatosika 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 Imerintsiatosika peaks around February 10 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highExtremeFeb 10UV 16Jun 17UV 7
UV index (midday)Level
Jan16Extreme
Feb16Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7High
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec15Extreme

Air quality in Imerintsiatosika 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 Imerintsiatosika is worst in October — around 24 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (January, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodOct 1723 µg/m³Jan 157 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb9Good
Mar11Good
Apr14Moderate
May21Moderate
Jun22Moderate
Jul21Moderate
Aug18Moderate
Sep15Moderate
Oct24Moderate
Nov17Moderate
Dec8Good
Location & terrain

Where is Imerintsiatosika?

Imerintsiatosika sits at 19.0°S, 47.3°E, 1,296 m above sea level, in Madagascar. The nearest listed city is Arivonimamo, 15 km away.

Topography around Imerintsiatosika

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

Within 3 km, the terrain around Imerintsiatosika has only modest variations in elevation — a maximum elevation change of 148 m around an average of 1,305 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 425 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,760 m.

The land around Imerintsiatosika is covered by cropland (55%) and grassland (34%) within 3 km, grassland (52%) and cropland (45%) within 16 km, and grassland (61%) and cropland (27%) within 80 km.

3 km
148 m
16 km
425 m
80 km
1,760 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Arivonimamo 15 km · Ambohidratrimo 22 km · Antananarivo 24 km · Ivato 27 km · Alarobia 44 km · Ambatolampy 46 km · Ambohitrolomahitsy 50 km · Manjakandriana 51 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 Imerintsiatosika (-18.9833°, 47.3167°, elevation 1,296 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).