Lallmatie weather in September

In September, Lallmatie sees average daytime highs of 23°C and overnight lows near 21°C, with 14 mm of rain across 2.7 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 58% of the time in September, and the air most often feels humid.

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 Lallmatie's 4th-clearest and 4th-windiest month. For the whole year in context, see Lallmatie's year-round climate.

Daytime high
23°
10th warmest
Overnight low
21°
3rd coldest
Rainfall
14 mm
2.7 wet days
Daylight
11 h 54 min
6:07 AM – 6:01 PM
Cloud cover
39%
4th clearest
Wind
24 km/h
4th windiest
Solar energy
5.64 kWh/m²
Travel score
8.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical September day in Lallmatie reaches about 23°C in the afternoon and slips back to 21°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 24°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

18°20°22°24°26°151015202530
Avg high (°C)Avg low (°C)
12321
22321
32321
42321
52321
62321
72321
82321
92321
102321
112321
122321
132321
142321
152321
162321
172321
182321
192421
202421
212421
222421
232421
242421
252421
262421
272421
282422
292422
302422

Lallmatie weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°16417.113.15.4
Feb28° / 26°13915.712.75.3
Mar28° / 26°11313.712.16.0
Apr27° / 25°469.511.66.8
May26° / 24°295.911.17.9
Jun24° / 22°122.910.88.6
Jul23° / 21°92.410.98.5
Aug23° / 21°142.411.38.4
Sep23° / 21°142.711.98.5
Oct24° / 22°132.612.58.5
Nov26° / 23°266.112.97.7
Dec27° / 25°6411.413.26.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 28% of September, with mostly cloudy or overcast conditions the remaining 15%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18713
28614
38614
48713
58713
68713
78614
88614
98614
108614
118416
128416
138317
148317
158317
168317
178317
188416
198416
208416
218515
228515
238515
248515
258614
268614
278614
288614
298614
308713

Chance of precipitation in September

Any precipitation

Lallmatie gets around 14 mm of rain over 2.7 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 9% and peaks near 11% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
18
28
38
48
58
68
78
89
99
109
1110
1210
1310
1411
1511
1611
1711
1811
1911
2010
2110
2210
239
249
258
268
277
287
297
307

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
112263140
212262150
312163150
412162160
512162160
612162160
712161170
812062170
912062170
1012061180
1112061180
1212061180
1312061180
1422059190
1521960190
1621960190
1721860200
1821859210
1921858220
2021758230
2121757240
2221756250
2321657250
2411657260
2511557270
2611556280
2711555290
2811455300
2911453311
3011353321

Wind in September

Winds average 24 km/h in September.

Across September, daily wind ranges from about 23 km/h on the calmest days to 25 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
125breezy
225breezy
325breezy
425breezy
525breezy
625breezy
725breezy
824breezy
924breezy
1024breezy
1124breezy
1224breezy
1324breezy
1424breezy
1524breezy
1624breezy
1723breezy
1823breezy
1923breezy
2023breezy
2123breezy
2223breezy
2323breezy
2423breezy
2523breezy
2623breezy
2723breezy
2823breezy
2923breezy
3023breezy

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 6:21 AM to 5:54 AM, and sunset from 5:57 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:215:57
211.66:215:58
311.66:205:58
411.76:195:58
511.76:185:58
611.76:175:58
711.76:165:59
811.76:155:59
911.86:145:59
1011.86:135:59
1111.86:126:00
1211.86:116:00
1311.86:106:00
1411.86:096:00
1511.96:086:00
1611.96:076:01
1711.96:066:01
1811.96:056:01
1911.96:056:01
2012.06:046:01
2112.06:036:02
2212.06:026:02
2312.06:016:02
2412.06:006:02
2512.15:596:03
2612.15:586:03
2712.15:576:03
2812.15:566:03
2912.15:556:04
3012.25:546:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.64 kWh/m².

For context, solar energy here swings from a low near 3.87 kWh/m² to a high of 7.15 kWh/m² in December across the year — September's 5.64 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.4Bright
85.4Bright
95.4Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.6Bright
155.6Bright
165.6Bright
175.7Bright
185.7Bright
195.7Bright
205.8Bright
215.8Bright
225.8Bright
235.9Bright
245.9Bright
255.9Bright
266.0Bright
276.0Intense
286.0Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Lallmatie

In seasonPeak

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

Lallmatie sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Lallmatie's rainy season runs January–March, when most of the year's rain falls.

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

Is September a good time to visit Lallmatie?

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

8.5
Sightseeing
2nd-best month of the year
6.8
Beach & pool
6th-best month of the year

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

What to pack for Lallmatie in September

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

In September, Lallmatie sees daytime highs around 23°C and nights near 21°C. Worth packing: light clothes, sun protection and a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near Lallmatie in September

The nearest coast averages about 24°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 km away) is warmest in February at about 28°C and coldest in August near 24°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Warm
Mar28Warm
Apr27Warm
May27Warm
Jun25Warm
Jul24Warm
Aug24Refreshing
Sep24Refreshing
Oct24Warm
Nov25Warm
Dec27Warm

UV index in Lallmatie 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 Lallmatie peaks around January 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 17UV 15Jun 22UV 7
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep11Extreme
Oct12Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

Where is Lallmatie?

Lallmatie sits at 20.0°S, 57.6°E, 0 m above sea level, in Mauritius. The nearest listed city is Triolet, 5.0 km away.

TrioletGoodlandsPamplemoussesLe HochetBaie-du-TombeauPort LouisSaint PierreCentre de Flacq

Topography around Lallmatie

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

Within 3 km, the terrain around Lallmatie has only modest variations in elevation — a maximum elevation change of 54 m around an average of 17 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 490 m; within 80 km, large variations in elevation — a maximum elevation change of 786 m.

The land around Lallmatie is covered by trees (31%), grassland (23%) and water (21%) within 3 km, water (63%) within 16 km, and water (84%) within 80 km.

3 km
54 m
16 km
490 m
80 km
786 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Triolet 5.0 km · Goodlands 8.0 km · Pamplemousses 10 km · Le Hochet 14 km · Baie-du-Tombeau 15 km · Port Louis 18 km · Saint Pierre 23 km · Centre de Flacq 24 km

Mauritius travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E / G
230 V · 50 Hz
Prices
≈ 39% of US
price level, 2025
GDP per capita
$12,991
2025
Happiness
5.9 / 10
World Happiness, 2025
Homicide rate
2.3
per 100k, 2022
Road deaths
12.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Hindu 49%Roman Catholic 26%Muslim 17%other Christian 6%

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 Lallmatie (-20.0184°, 57.5802°, elevation 0 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).