Le Port weather in September

In September, Le Port sees average daytime highs of 22°C and overnight lows near 19°C, with 26 mm of rain across 8.6 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 56% 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 Le Port's 4th-clearest and 11th-windiest month. For the whole year in context, see Le Port's year-round climate.

Daytime high
22°
10th warmest
Overnight low
19°
3rd coldest
Rainfall
26 mm
8.6 wet days
Daylight
11 h 54 min
6:17 AM – 6:10 PM
Cloud cover
38%
4th clearest
Wind
6 km/h
11th windiest
Solar energy
6.05 kWh/m²
Travel score
7.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in Le Port reaches about 22°C in the afternoon and slips back to 19°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 23°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

15°18°20°23°25°151015202530
Avg high (°C)Avg low (°C)
12219
22219
32219
42219
52219
62219
72219
82219
92219
102219
112219
122219
132219
142219
152219
162219
172219
182220
192220
202220
212220
222220
232220
242320
252320
262320
272320
282320
292320
302320

Le Port weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 24°18521.513.14.9
Feb27° / 25°17220.612.74.7
Mar26° / 24°16020.712.15.1
Apr26° / 23°5413.611.56.3
May24° / 22°4210117.3
Jun23° / 20°23710.87.7
Jul22° / 19°196.410.97.7
Aug22° / 19°258.811.37.3
Sep22° / 19°268.611.97.3
Oct23° / 21°3510.312.57.0
Nov24° / 22°5913.3136.5
Dec26° / 23°9317.213.25.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 26% of September, with mostly cloudy or overcast conditions the remaining 17%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18911
28911
38911
48812
58812
68812
78713
88713
98515
108515
118416
128317
138218
148119
158119
168020
178020
188020
197921
207921
217921
227921
237921
247921
258020
268020
278020
288020
298020
308020

Chance of precipitation in September

Any precipitation

Le Port gets around 26 mm of rain over 8.6 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 29% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
227
327
427
527
626
726
826
926
1027
1127
1227
1327
1428
1528
1629
1729
1830
1930
2030
2131
2231
2332
2432
2532
2632
2733
2833
2933
3033

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 57% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1547462
2547462
3547472
4546472
5546482
6545492
7544492
8444502
9443512
10442522
11441523
12441523
13440533
14439543
15338563
16337573
17336583
18335593
19334594
20332614
21331624
22230644
23229654
24228655
25227665
26226675
27226666
28125686
29225667
30224668

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
306calm

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 6:31 AM to 6:03 AM, and sunset from 6:06 PM to 6:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:316:06
211.66:306:06
311.66:296:06
411.66:286:07
511.76:276:07
611.76:266:07
711.76:266:07
811.76:256:08
911.76:246:08
1011.86:236:08
1111.86:226:08
1211.86:216:09
1311.86:206:09
1411.86:196:09
1511.96:186:09
1611.96:176:10
1711.96:166:10
1811.96:156:10
1911.96:146:10
2012.06:136:11
2112.06:126:11
2212.06:116:11
2312.06:106:11
2412.06:096:12
2512.16:086:12
2612.16:076:12
2712.16:066:12
2812.16:056:13
2912.16:046:13
3012.26:036:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.05 kWh/m².

For context, solar energy here swings from a low near 4.04 kWh/m² to a high of 7.25 kWh/m² in December across the year — September's 6.05 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.6Bright
35.6Bright
45.7Bright
55.7Bright
65.7Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.9Bright
125.9Bright
135.9Bright
146.0Bright
156.0Intense
166.0Intense
176.1Intense
186.1Intense
196.1Intense
206.2Intense
216.2Intense
226.2Intense
236.3Intense
246.3Intense
256.3Intense
266.4Intense
276.4Intense
286.4Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Le Port

In seasonPeak

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

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

Le Port's monsoon runs December–March, when most of the year's rain falls.

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

Is September a good time to visit Le Port?

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

7.3
Sightseeing
3rd-best month of the year
5.2
Beach & pool
8th-best month of the year

September is one of the better times to visit Le Port for general sightseeing.

What to pack for Le Port in September

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

In September, Le Port sees daytime highs around 22°C and nights near 19°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Le Port 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 offshore 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
Feb28Tropical
Mar28Tropical
Apr28Warm
May27Warm
Jun25Warm
Jul24Warm
Aug24Refreshing
Sep24Refreshing
Oct24Warm
Nov25Warm
Dec27Warm

UV index in Le Port in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Le Port peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 18UV 15Jun 23UV 6
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May8Very high
Jun6High
Jul6High
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov12Extreme
Dec14Extreme
Location & terrain

Where is Le Port?

Le Port sits at 20.9°S, 55.3°E, 22 m above sea level, in Reunion. The nearest listed city is La Possession, 4.0 km away.

La PossessionSaint-PaulSaint-DenisSaint-LeuSainte-MariePiton Saint-LeuSainte-SuzanneSaint-André

Topography around Le Port

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

Within 3 km, the terrain around Le Port has only modest variations in elevation — a maximum elevation change of 118 m around an average of 18 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,004 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,030 m.

The land around Le Port is covered by water (49%) and artificial surfaces (26%) within 3 km, water (60%) and trees (28%) within 16 km, and water (76%) within 80 km.

3 km
118 m
16 km
2,004 m
80 km
3,030 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: La Possession 4.0 km · Saint-Paul 8.0 km · Saint-Denis 17 km · Saint-Leu 26 km · Sainte-Marie 27 km · Piton Saint-Leu 31 km · Sainte-Suzanne 33 km · Saint-André 37 km

Reunion travel facts

Power plugs
Type C / E
220 V · 50 Hz

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 Le Port (-20.9375°, 55.2942°, 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. 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).