Saint-Joseph weather in December

In December, Saint-Joseph sees average daytime highs of 25°C and overnight lows near 24°C, with 76 mm of rain across 9.2 wet days and about 13.3 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 49% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 h 12 min at the start of December to 13 h 18 min by month's end. Set against the rest of the year, December is Saint-Joseph's 9th-clearest and 12th-windiest month. For the whole year in context, see Saint-Joseph's year-round climate.

Daytime high
25°
4th warmest
Overnight low
24°
9th coldest
Rainfall
76 mm
9.2 wet days
Daylight
13 h 18 min
5:35 AM – 6:53 PM
Cloud cover
46%
9th clearest
Wind
18 km/h
12th windiest
Solar energy
7.02 kWh/m²
Travel score
7.2
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical December day in Saint-Joseph reaches about 25°C in the afternoon and slips back to 24°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 26°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12524
22524
32524
42524
52524
62524
72524
82524
92524
102524
112524
122524
132524
142524
152524
162524
172524
182524
192524
202624
212624
222625
232625
242625
252625
262625
272625
282625
292625
302625
312625

Saint-Joseph weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 4th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17228
27129
37129
47030
57030
67030
77030
86931
96931
106832
116931
126832
136733
146733
156634
166535
176535
186535
196436
206337
216238
226139
236040
246040
255941
265842
275644
285545
295347
305248
315149

Chance of precipitation in December

Any precipitation

Saint-Joseph gets around 76 mm of rain over 9.2 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
126
227
327
427
528
628
729
829
929
1029
1129
1229
1329
1429
1530
1630
1729
1829
1929
2029
2129
2230
2330
2431
2532
2633
2734
2835
2936
3037
3138

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1657370
2556390
3554410
4453430
5451441
6449461
7448481
8446491
9444511
10443521
11441541
12440551
13438571
14437581
15436591
16435601
17434611
18333631
19333640
20332650
21331660
22330670
23330670
24329680
25228700
26228700
27227701
28126721
29125731
30124741
31123751

Wind in December

Winds average 18 km/h in December, the calmest month.

Across December, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 12 min at the start of December to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:31 AM to 5:42 AM, and sunset from 6:44 PM to 6:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:316:44
213.25:316:44
313.25:316:45
413.25:316:45
513.25:326:46
613.25:326:47
713.35:326:47
813.35:326:48
913.35:336:49
1013.35:336:49
1113.35:336:50
1213.35:336:50
1313.35:346:51
1413.35:346:51
1513.35:346:52
1613.35:356:53
1713.35:356:53
1813.35:366:54
1913.35:366:54
2013.35:376:55
2113.35:376:55
2213.35:376:56
2313.35:386:56
2413.35:386:57
2513.35:396:57
2613.35:396:57
2713.35:406:58
2813.35:406:58
2913.35:416:59
3013.35:426:59
3113.35:426:59

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.02 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 — December's 7.02 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.1Intense
27.1Intense
37.1Intense
47.1Intense
57.1Intense
67.1Intense
77.1Intense
87.1Intense
97.1Intense
107.1Intense
117.1Intense
127.1Intense
137.1Intense
147.0Intense
157.0Intense
167.0Intense
177.0Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
227.0Intense
236.9Intense
246.9Intense
256.9Intense
266.8Intense
276.8Intense
286.8Intense
296.8Intense
306.7Intense
316.7Intense
Planning a trip in December

Hazard calendar for Saint-Joseph

In seasonPeak

In December, Saint-Joseph sits inside its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.

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 December a good time to visit Saint-Joseph?

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

7.2
Sightseeing
8th-best month of the year
6.5
Beach & pool
2nd-best month of the year

December is one of the better times to visit Saint-Joseph for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Saint-Joseph in December

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

In December, Saint-Joseph sees daytime highs around 25°C and nights near 24°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Saint-Joseph in December

The nearest coast averages about 27°C in December — 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 December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (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
December 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).