Sainte-Suzanne weather in September

In September, Sainte-Suzanne sees average daytime highs of 21°C and overnight lows near 17°C, with 36 mm of rain across 10.1 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels comfortable.

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

Daytime high
21°
9th warmest
Overnight low
17°
3rd coldest
Rainfall
36 mm
10.1 wet days
Daylight
11 h 54 min
6:15 AM – 6:08 PM
Cloud cover
45%
4th clearest
Wind
8 km/h
4th windiest
Solar energy
5.93 kWh/m²
Travel score
6.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 21°C through the month.

A typical September day in Sainte-Suzanne reaches about 21°C in the afternoon and slips back to 17°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 23°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12116
22116
32116
42116
52116
62116
72116
82116
92116
102117
112117
122117
132117
142117
152117
162117
172217
182217
192217
202217
212217
222217
232217
242217
252217
262217
272217
282217
292217
302217

Sainte-Suzanne weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 22°25121.713.14.9
Feb26° / 22°24421.912.74.5
Mar26° / 22°2192212.15.0
Apr25° / 21°7816.711.55.8
May23° / 19°7416116.2
Jun21° / 17°401110.86.6
Jul21° / 16°3611.910.96.5
Aug21° / 16°341011.36.8
Sep21° / 17°3610.111.96.8
Oct23° / 18°471112.56.7
Nov24° / 19°8415.4136.1
Dec25° / 21°13818.913.25.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27921
37921
47921
57822
67723
77723
87624
97525
107426
117228
127228
137129
147030
156931
166832
176832
186832
196832
206832
216832
226832
236733
246832
256832
266832
276931
286931
296832
306832

Chance of precipitation in September

Any precipitation

Sainte-Suzanne gets around 36 mm of rain over 10.1 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 34% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
134
234
334
434
533
633
733
833
933
1033
1133
1233
1333
1433
1534
1634
1734
1835
1935
2035
2135
2235
2334
2434
2534
2633
2733
2833
2932
3032

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 66% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12462140
22363140
32362150
42263150
52164150
62163160
72064160
81965160
91866160
101767160
111668160
121668160
131569160
141469170
151469170
161370170
171270180
181269190
191268200
201168210
211167220
221067230
231066240
241066240
25966250
26965260
27963271
28863281
29862291
30861301

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:30 AM to 6:02 AM, and sunset from 6:05 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:306:05
211.66:296:05
311.66:286:05
411.66:276:05
511.76:266:06
611.76:256:06
711.76:246:06
811.76:236:06
911.76:226:07
1011.86:216:07
1111.86:206:07
1211.86:196:07
1311.86:186:08
1411.86:176:08
1511.96:166:08
1611.96:156:08
1711.96:146:09
1811.96:136:09
1911.96:126:09
2012.06:116:09
2112.06:116:10
2212.06:106:10
2312.06:096:10
2412.06:086:10
2512.16:076:11
2612.16:066:11
2712.16:056:11
2812.16:046:11
2912.16:036:12
3012.26:026:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.93 kWh/m².

For context, solar energy here swings from a low near 3.95 kWh/m² to a high of 7.17 kWh/m² in December across the year — September's 5.93 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.5Bright
35.5Bright
45.5Bright
55.6Bright
65.6Bright
75.6Bright
85.7Bright
95.7Bright
105.7Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.9Bright
165.9Bright
176.0Bright
186.0Bright
196.0Intense
206.0Intense
216.1Intense
226.1Intense
236.2Intense
246.2Intense
256.2Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.4Intense
Planning a trip in September

Hazard calendar for Sainte-Suzanne

In seasonPeak

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

Sainte-Suzanne sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Sainte-Suzanne'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 Sainte-Suzanne?

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

6.8
Sightseeing
1st-best month of the year
4.4
Beach & pool
8th-best month of the year

September is a reasonable time to visit Sainte-Suzanne for sightseeing.

What to pack for Sainte-Suzanne in September

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

In September, Sainte-Suzanne sees daytime highs around 21°C and nights near 17°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Sainte-Suzanne 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 23°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
Apr27Warm
May27Warm
Jun25Warm
Jul24Refreshing
Aug23Refreshing
Sep24Refreshing
Oct24Warm
Nov25Warm
Dec27Warm

UV index in Sainte-Suzanne 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 Sainte-Suzanne peaks around January 18 at about 16 (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 16Jun 23UV 6
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May8Very high
Jun6High
Jul6High
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

Where is Sainte-Suzanne?

Sainte-Suzanne sits at 20.9°S, 55.6°E, 10 m above sea level, in Reunion. The nearest listed city is Sainte-Marie, 6.0 km away.

Sainte-MarieSaint-AndréSaint-DenisSaint-BenoîtLa PossessionLe PortSaint-PaulLe Tampon

Topography around Sainte-Suzanne

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

Within 3 km, the terrain around Sainte-Suzanne has only modest variations in elevation — a maximum elevation change of 236 m around an average of 42 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,779 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,030 m.

The land around Sainte-Suzanne is covered by water (46%) and trees (26%) within 3 km, water (56%) and trees (32%) within 16 km, and water (79%) within 80 km.

3 km
236 m
16 km
1,779 m
80 km
3,030 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Sainte-Marie 6.0 km · Saint-André 8.0 km · Saint-Denis 17 km · Saint-Benoît 18 km · La Possession 28 km · Le Port 33 km · Saint-Paul 37 km · Le Tampon 42 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 Sainte-Suzanne (-20.9062°, 55.6079°, elevation 10 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).