Saint-Joseph weather in August

In August, Saint-Joseph sees average daytime highs of 21°C and overnight lows near 20°C, with 29 mm of rain across 6.4 wet days and about 11.3 hours of daylight. It is the 12th-warmest and 10th-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 81% of the time in August, and the air most often feels humid.

Daylight stretches from about 11 hours at the start of August to 11 h 30 min by month's end. Set against the rest of the year, August is Saint-Joseph's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Saint-Joseph's year-round climate.

Daytime high
21°
12th warmest
Overnight low
20°
1st coldest
Rainfall
29 mm
6.4 wet days
Daylight
11 h 18 min
6:44 AM – 5:59 PM
Cloud cover
26%
2nd clearest
Wind
24 km/h
2nd windiest
Solar energy
4.8 kWh/m²
Travel score
7.8
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in Saint-Joseph reaches about 21°C in the afternoon and slips back to 20°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 22°C. Set against its neighbours, August runs on par with July and on par with September.

15°18°20°23°25°151015202531
Avg high (°C)Avg low (°C)
12120
22120
32120
42120
52120
62120
72120
82120
92120
102120
112120
122120
132120
142120
152120
162120
172120
182120
192120
202120
212120
222120
232120
242120
252120
262120
272120
282120
292120
302120
312120

Saint-Joseph weather by month

How August compares with the rest of the year at a glance. August is the 12th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 25°14412.713.26.3
Feb26° / 25°13413.112.76.1
Mar26° / 25°12511.212.26.7
Apr25° / 24°6310.211.57.1
May24° / 23°559.4117.6
Jun23° / 21°428.310.77.6
Jul22° / 20°419.110.87.3
Aug21° / 20°296.411.37.8
Sep22° / 21°234.911.98.0
Oct23° / 22°244.812.58.1
Nov24° / 23°456138.0
Dec25° / 24°769.213.37.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 81% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 6%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1937
2937
3937
4937
5937
6946
7946
8946
9946
10946
11946
12946
13946
14946
15946
16946
17946
18946
19946
20946
21946
22946
23946
24946
25937
26937
27937
28937
29937
30937
31937

Chance of precipitation in August

Any precipitation

Saint-Joseph gets around 29 mm of rain over 6.4 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 20% and peaks near 22% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
121
221
321
421
520
620
720
820
920
1019
1119
1219
1318
1418
1518
1618
1719
1819
1919
2019
2120
2220
2320
2421
2521
2621
2722
2822
2922
3022
3122

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13364911
23364911
33364911
43374911
53374911
63374910
73384910
8337519
9337519
10337519
11337528
12336538
13336538
14335548
15335557
16334567
17334567
18334567
19333586
20333586
21333586
22333586
23333586
24332596
25332596
26332587
27331597
28331597
29331597
30331588
31330598

Wind in August

Winds average 24 km/h in August.

Across August, daily wind ranges from about 24 km/h on the calmest days to 25 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
125breezy
225breezy
325breezy
425breezy
525breezy
625breezy
725breezy
825breezy
924breezy
1024breezy
1124breezy
1224breezy
1324breezy
1424breezy
1524breezy
1624breezy
1724breezy
1824breezy
1924breezy
2024breezy
2124breezy
2224breezy
2324breezy
2424breezy
2524breezy
2624breezy
2724breezy
2824breezy
2924breezy
3024breezy
3124breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 hours at the start of August to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over August. Sunrise moves from 6:53 AM to 6:31 AM, and sunset from 5:54 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:535:54
211.06:535:54
311.06:525:55
411.16:525:55
511.16:515:56
611.16:515:56
711.16:505:56
811.16:495:57
911.16:495:57
1011.26:485:57
1111.26:475:58
1211.26:475:58
1311.26:465:58
1411.26:455:59
1511.26:455:59
1611.36:445:59
1711.36:436:00
1811.36:426:00
1911.36:416:00
2011.36:416:01
2111.46:406:01
2211.46:396:01
2311.46:386:02
2411.46:376:02
2511.46:366:02
2611.46:366:03
2711.56:356:03
2811.56:346:03
2911.56:336:03
3011.56:326:04
3111.56:316:04

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.8 kWh/m².

For context, solar energy here swings from a low near 3.86 kWh/m² to a high of 7.07 kWh/m² in November across the year — August's 4.8 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.6Bright
94.6Bright
104.6Bright
114.7Bright
124.7Bright
134.7Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.9Bright
194.9Bright
204.9Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.1Bright
265.1Bright
275.1Bright
285.2Bright
295.2Bright
305.3Bright
315.3Bright
Planning a trip in August

Hazard calendar for Saint-Joseph

In seasonPeak

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

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

Saint-Joseph's rainy season runs December–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 August a good time to visit Saint-Joseph?

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

7.8
Sightseeing
4th-best month of the year
5.0
Beach & pool
11th-best month of the year

August is one of the better times to visit Saint-Joseph for general sightseeing.

What to pack for Saint-Joseph in August

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

In August, Saint-Joseph sees daytime highs around 21°C and nights near 20°C. Worth packing: sun protection and a windbreaker. About 6 days see rain.

sun protectiona windbreaker

Sea temperature near Saint-Joseph in August

The nearest coast averages about 23°C in August — 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
Feb28Warm
Mar28Warm
Apr27Warm
May26Warm
Jun25Warm
Jul24Refreshing
Aug23Refreshing
Sep23Refreshing
Oct24Warm
Nov25Warm
Dec27Warm

UV index in Saint-Joseph in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saint-Joseph peaks around January 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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 17UV 16Jul 10UV 6
UV index (midday)Level
Jan17Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun6High
Jul6High
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

Where is Saint-Joseph?

Saint-Joseph sits at 21.4°S, 55.6°E, 43 m above sea level, in Reunion. The nearest listed city is Saint-Pierre, 15 km away.

Saint-PierreLe TamponSaint-LouisPiton Saint-LeuSaint-BenoîtSaint-LeuSaint-AndréSainte-Suzanne

Topography around Saint-Joseph

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

Within 3 km, the terrain around Saint-Joseph has significant variations in elevation — a maximum elevation change of 486 m around an average of 108 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,407 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,030 m.

The land around Saint-Joseph is covered by trees (39%) and water (39%) within 3 km, water (53%) and trees (30%) within 16 km, and water (77%) within 80 km.

3 km
486 m
16 km
2,407 m
80 km
3,030 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Saint-Pierre 15 km · Le Tampon 15 km · Saint-Louis 24 km · Piton Saint-Leu 36 km · Saint-Benoît 39 km · Saint-Leu 41 km · Saint-André 46 km · Sainte-Suzanne 52 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 Saint-Joseph (-21.3777°, 55.6169°, elevation 43 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).