Saint-Denis weather in December
In December, Saint-Denis sees average daytime highs of 25°C and overnight lows near 21°C, with 138 mm of rain across 18.9 wet days and about 13.2 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 17% of the time in December, and the air most often feels muggy.
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-Denis's 9th-clearest and 9th-windiest month. For the whole year in context, see Saint-Denis's year-round climate.
- Daytime high
- 25°
- 4th warmest
- Overnight low
- 21°
- 9th coldest
- Rainfall
- 138 mm
- 18.9 wet days
- Daylight
- 13 h 18 min
- 5:37 AM – 6:52 PM
- Cloud cover
- 64%
- 9th clearest
- Wind
- 8 km/h
- 9th windiest
- Solar energy
- 7.17 kWh/m²
- Travel score
- 5.4
- out of 10
Saint-Denis is French commune in Réunion.
- Density
- 1,084/km²
- people per km²
- Founded
- 1669
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 25°C through the month.
A typical December day in Saint-Denis reaches about 25°C in the afternoon and slips back to 21°C overnight — a 4°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 1°C warmer than November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg low (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 24 | 20 |
| 2 | 25 | 20 |
| 3 | 25 | 20 |
| 4 | 25 | 20 |
| 5 | 25 | 20 |
| 6 | 25 | 20 |
| 7 | 25 | 21 |
| 8 | 25 | 21 |
| 9 | 25 | 21 |
| 10 | 25 | 21 |
| 11 | 25 | 21 |
| 12 | 25 | 21 |
| 13 | 25 | 21 |
| 14 | 25 | 21 |
| 15 | 25 | 21 |
| 16 | 25 | 21 |
| 17 | 25 | 21 |
| 18 | 25 | 21 |
| 19 | 25 | 21 |
| 20 | 25 | 21 |
| 21 | 25 | 21 |
| 22 | 25 | 21 |
| 23 | 25 | 21 |
| 24 | 25 | 21 |
| 25 | 25 | 21 |
| 26 | 25 | 21 |
| 27 | 25 | 21 |
| 28 | 25 | 21 |
| 29 | 25 | 22 |
| 30 | 25 | 22 |
| 31 | 25 | 22 |
Saint-Denis 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.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 22° | 251 | 21.7 | 13.1 | 4.9 |
| Feb | 26° / 22° | 244 | 21.9 | 12.7 | 4.5 |
| Mar | 26° / 22° | 219 | 22 | 12.1 | 5.0 |
| Apr | 25° / 21° | 78 | 16.7 | 11.5 | 5.8 |
| May | 23° / 19° | 74 | 16 | 11 | 6.2 |
| Jun | 21° / 17° | 40 | 11 | 10.8 | 6.6 |
| Jul | 21° / 16° | 36 | 11.9 | 10.9 | 6.5 |
| Aug | 21° / 16° | 34 | 10 | 11.3 | 6.8 |
| Sep | 21° / 17° | 36 | 10.1 | 11.9 | 6.8 |
| Oct | 23° / 18° | 47 | 11 | 12.5 | 6.7 |
| Nov | 24° / 19° | 84 | 15.4 | 13 | 6.1 |
| Dec | 25° / 21° | 138 | 18.9 | 13.2 | 5.4 |
Cloud cover in December
The sky is clear or mostly clear about 17% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 23% of December, with mostly cloudy or overcast conditions the remaining 61%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 44 | 44 | 43 | 42 | 42 | 41 | 41 | 40 | 40 | 39 | 39 | 38 | 38 | 37 | 36 | 34 | 34 | 32 | 32 | 31 | 31 | 31 |
| Cloudier (%) | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 56 | 56 | 57 | 58 | 58 | 59 | 59 | 60 | 60 | 61 | 61 | 62 | 62 | 63 | 64 | 66 | 66 | 68 | 68 | 69 | 69 | 69 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 45 | 55 |
| 2 | 45 | 55 |
| 3 | 45 | 55 |
| 4 | 45 | 55 |
| 5 | 45 | 55 |
| 6 | 45 | 55 |
| 7 | 45 | 55 |
| 8 | 45 | 55 |
| 9 | 45 | 55 |
| 10 | 44 | 56 |
| 11 | 44 | 56 |
| 12 | 43 | 57 |
| 13 | 42 | 58 |
| 14 | 42 | 58 |
| 15 | 41 | 59 |
| 16 | 41 | 59 |
| 17 | 40 | 60 |
| 18 | 40 | 60 |
| 19 | 39 | 61 |
| 20 | 39 | 61 |
| 21 | 38 | 62 |
| 22 | 38 | 62 |
| 23 | 37 | 63 |
| 24 | 36 | 64 |
| 25 | 34 | 66 |
| 26 | 34 | 66 |
| 27 | 32 | 68 |
| 28 | 32 | 68 |
| 29 | 31 | 69 |
| 30 | 31 | 69 |
| 31 | 31 | 69 |
Chance of precipitation in December
Saint-Denis gets around 138 mm of rain over 18.9 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 62% and peaks near 67% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 58 | 58 | 58 | 59 | 59 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 63 | 63 | 64 | 65 | 65 | 66 | 66 | 67 | 67 |
| Rain chance (%) | |
|---|---|
| 1 | 58 |
| 2 | 58 |
| 3 | 58 |
| 4 | 59 |
| 5 | 59 |
| 6 | 59 |
| 7 | 59 |
| 8 | 59 |
| 9 | 59 |
| 10 | 60 |
| 11 | 60 |
| 12 | 60 |
| 13 | 61 |
| 14 | 61 |
| 15 | 61 |
| 16 | 62 |
| 17 | 62 |
| 18 | 62 |
| 19 | 62 |
| 20 | 62 |
| 21 | 62 |
| 22 | 62 |
| 23 | 63 |
| 24 | 63 |
| 25 | 64 |
| 26 | 65 |
| 27 | 65 |
| 28 | 66 |
| 29 | 66 |
| 30 | 67 |
| 31 | 67 |
Humidity in December
Most of December feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the muggy band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 67% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Humid (%) | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 | 32 | 31 | 30 | 30 | 29 | 28 | 28 | 27 | 27 | 26 | 25 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 |
| Muggy (%) | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 61 | 62 | 61 | 62 | 62 | 63 | 64 | 64 | 64 | 64 | 64 | 65 | 65 | 64 | 64 | 64 | 64 | 64 | 64 | 63 | 63 |
| Oppressive (%) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 15 | 16 | 18 | 19 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 5 | 43 | 52 | 0 |
| 2 | 5 | 42 | 53 | 0 |
| 3 | 4 | 41 | 54 | 1 |
| 4 | 4 | 40 | 55 | 1 |
| 5 | 4 | 39 | 56 | 1 |
| 6 | 4 | 38 | 57 | 1 |
| 7 | 4 | 37 | 58 | 1 |
| 8 | 3 | 36 | 59 | 2 |
| 9 | 3 | 35 | 60 | 2 |
| 10 | 3 | 34 | 61 | 2 |
| 11 | 3 | 33 | 61 | 3 |
| 12 | 3 | 32 | 62 | 3 |
| 13 | 3 | 32 | 61 | 4 |
| 14 | 3 | 31 | 62 | 4 |
| 15 | 3 | 30 | 62 | 5 |
| 16 | 2 | 30 | 63 | 5 |
| 17 | 2 | 29 | 64 | 5 |
| 18 | 2 | 28 | 64 | 6 |
| 19 | 2 | 28 | 64 | 6 |
| 20 | 2 | 27 | 64 | 7 |
| 21 | 2 | 27 | 64 | 7 |
| 22 | 1 | 26 | 65 | 8 |
| 23 | 1 | 25 | 65 | 9 |
| 24 | 1 | 25 | 64 | 10 |
| 25 | 1 | 24 | 64 | 11 |
| 26 | 1 | 23 | 64 | 12 |
| 27 | 1 | 22 | 64 | 13 |
| 28 | 0 | 21 | 64 | 15 |
| 29 | 0 | 20 | 64 | 16 |
| 30 | 0 | 19 | 63 | 18 |
| 31 | 0 | 18 | 63 | 19 |
Wind in December
Winds average 8 km/h in December.
Across December, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 8 | calm |
| 2 | 8 | calm |
| 3 | 8 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
Sunrise & sunset in December
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 5:33 AM to 5:44 AM, and sunset from 6:43 PM to 6:59 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 |
| Sunrise (AM) | 5:33 | 5:33 | 5:33 | 5:33 | 5:33 | 5:33 | 5:34 | 5:34 | 5:34 | 5:34 | 5:35 | 5:35 | 5:35 | 5:36 | 5:36 | 5:37 | 5:37 | 5:37 | 5:38 | 5:38 | 5:39 | 5:39 | 5:40 | 5:40 | 5:41 | 5:41 | 5:42 | 5:42 | 5:43 | 5:43 | 5:44 |
| Sunset (PM) | 6:43 | 6:44 | 6:45 | 6:45 | 6:46 | 6:46 | 6:47 | 6:48 | 6:48 | 6:49 | 6:49 | 6:50 | 6:51 | 6:51 | 6:52 | 6:52 | 6:53 | 6:53 | 6:54 | 6:54 | 6:55 | 6:55 | 6:56 | 6:56 | 6:57 | 6:57 | 6:57 | 6:58 | 6:58 | 6:59 | 6:59 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.2 | 5:33 | 6:43 |
| 2 | 13.2 | 5:33 | 6:44 |
| 3 | 13.2 | 5:33 | 6:45 |
| 4 | 13.2 | 5:33 | 6:45 |
| 5 | 13.2 | 5:33 | 6:46 |
| 6 | 13.2 | 5:33 | 6:46 |
| 7 | 13.2 | 5:34 | 6:47 |
| 8 | 13.2 | 5:34 | 6:48 |
| 9 | 13.2 | 5:34 | 6:48 |
| 10 | 13.2 | 5:34 | 6:49 |
| 11 | 13.2 | 5:35 | 6:49 |
| 12 | 13.2 | 5:35 | 6:50 |
| 13 | 13.3 | 5:35 | 6:51 |
| 14 | 13.3 | 5:36 | 6:51 |
| 15 | 13.3 | 5:36 | 6:52 |
| 16 | 13.3 | 5:37 | 6:52 |
| 17 | 13.3 | 5:37 | 6:53 |
| 18 | 13.3 | 5:37 | 6:53 |
| 19 | 13.3 | 5:38 | 6:54 |
| 20 | 13.3 | 5:38 | 6:54 |
| 21 | 13.3 | 5:39 | 6:55 |
| 22 | 13.3 | 5:39 | 6:55 |
| 23 | 13.3 | 5:40 | 6:56 |
| 24 | 13.3 | 5:40 | 6:56 |
| 25 | 13.3 | 5:41 | 6:57 |
| 26 | 13.3 | 5:41 | 6:57 |
| 27 | 13.3 | 5:42 | 6:57 |
| 28 | 13.3 | 5:42 | 6:58 |
| 29 | 13.3 | 5:43 | 6:58 |
| 30 | 13.3 | 5:43 | 6:59 |
| 31 | 13.3 | 5:44 | 6:59 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 7.17 kWh/m² — the sunniest month for solar.
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 — December's 7.17 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.2 | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 7.0 | 7.0 | 7.0 | 7.0 | 6.9 | 6.9 | 6.9 | 6.8 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 7.2 | Intense |
| 2 | 7.2 | Intense |
| 3 | 7.2 | Intense |
| 4 | 7.2 | Intense |
| 5 | 7.2 | Intense |
| 6 | 7.2 | Intense |
| 7 | 7.2 | Intense |
| 8 | 7.2 | Intense |
| 9 | 7.2 | Intense |
| 10 | 7.2 | Intense |
| 11 | 7.2 | Intense |
| 12 | 7.2 | Intense |
| 13 | 7.2 | Intense |
| 14 | 7.2 | Intense |
| 15 | 7.2 | Intense |
| 16 | 7.2 | Intense |
| 17 | 7.2 | Intense |
| 18 | 7.2 | Intense |
| 19 | 7.1 | Intense |
| 20 | 7.1 | Intense |
| 21 | 7.1 | Intense |
| 22 | 7.1 | Intense |
| 23 | 7.1 | Intense |
| 24 | 7.0 | Intense |
| 25 | 7.0 | Intense |
| 26 | 7.0 | Intense |
| 27 | 7.0 | Intense |
| 28 | 6.9 | Intense |
| 29 | 6.9 | Intense |
| 30 | 6.9 | Intense |
| 31 | 6.8 | Intense |
Hazard calendar for Saint-Denis
In December, Saint-Denis sits inside its cyclone and monsoon season. The full year is below, with each hazard's peak months called out.
Saint-Denis sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Saint-Denis's monsoon runs December–March, when most of the year's rain falls.
Is December a good time to visit Saint-Denis?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Saint-Denis for sightseeing.
What to pack for Saint-Denis in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Saint-Denis sees daytime highs around 25°C and nights near 21°C. Pack rain gear and sun protection. Worth having: light clothes. About 19 days see rain.
Sea temperature near Saint-Denis 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 24°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 28 | 28 | 27 | 25 | 24 | 24 | 24 | 24 | 25 | 27 |
| Comfort | Warm | Tropical | Tropical | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 28 | Tropical |
| Apr | 28 | Warm |
| May | 27 | Warm |
| Jun | 25 | Warm |
| Jul | 24 | Warm |
| Aug | 24 | Refreshing |
| Sep | 24 | Refreshing |
| Oct | 24 | Warm |
| Nov | 25 | Warm |
| Dec | 27 | Warm |
UV index in Saint-Denis in December
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-Denis 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 16 | 15 | 13 | 10 | 8 | 6 | 6 | 9 | 10 | 12 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | Very high | High | High | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 16 | Extreme |
| Feb | 15 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Very high |
| May | 8 | Very high |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 9 | Very high |
| Sep | 10 | Extreme |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Where is Saint-Denis?
Saint-Denis sits at 20.9°S, 55.5°E, 44 m above sea level, in Reunion. The nearest listed city is Sainte-Marie, 11 km away.
Topography around Saint-Denis
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint-Denis.
Within 3 km, the terrain around Saint-Denis has large variations in elevation — a maximum elevation change of 635 m around an average of 104 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,258 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,030 m.
The land around Saint-Denis is covered by water (40%), trees (33%) and artificial surfaces (24%) within 3 km, water (55%) and trees (34%) within 16 km, and water (78%) within 80 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-Denis (-20.8823°, 55.4504°, elevation 44 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).