Climate and average weather in Saint-Joseph
In Saint-Joseph, the weather is muggy, warm, showery, and partly cloudy and remarkably steady, with daytime highs holding near warm levels all year. The wettest stretch peaks around January.
Over the course of the year, the temperature in Saint-Joseph typically varies from 20°C to 26°C, and is rarely below 19°C or above 27°C. February is the hottest month of the year, while August is the coldest.
Based on the travel score, the best time of year to visit Saint-Joseph for warm-weather activities is from mid March to late December.
- Hottest
- Feb
- 26°
- Coldest
- Aug
- 20°
- Wettest
- Jan
- 144 mm
- Driest
- Sep
- 23 mm
- Rain / yr
- 800 mm
- 105 wet days
- Daylight
- 10.7–13.3 h
- shortest–longest
- Elevation
- 43 m
- 21.4°S
- Clearest
- Sep
- 25% cloud
Saint-Joseph weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid March to late December.
Temperature through the year
Daily average highs and lows in Saint-Joseph, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in Saint-Joseph stay fairly even through the year, without a distinct hot or cool season. The warmest month is February, with an average high of 26°C and low of 25°C; the coolest is August, with an average low of 20°C and high of 21°C.
Days typically run about 1°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 26 | 25 | 24 | 23 | 22 | 21 | 22 | 23 | 24 | 25 |
| Avg low (°C) | 25 | 25 | 25 | 24 | 23 | 21 | 20 | 20 | 21 | 22 | 23 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 26 | 25 |
| Feb | 26 | 25 |
| Mar | 26 | 25 |
| Apr | 25 | 24 |
| May | 24 | 23 |
| Jun | 23 | 21 |
| Jul | 22 | 20 |
| Aug | 21 | 20 |
| Sep | 22 | 21 |
| Oct | 23 | 22 |
| Nov | 24 | 23 |
| Dec | 25 | 24 |
Average hourly temperature in Saint-Joseph
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on February afternoons, near 26°C, and coldest before dawn in August, near 20°C.
Saint-Joseph weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 25° | 144 | 12.7 | 13.2 | 6.3 |
| Feb | 26° / 25° | 134 | 13.1 | 12.7 | 6.1 |
| Mar | 26° / 25° | 125 | 11.2 | 12.2 | 6.7 |
| Apr | 25° / 24° | 63 | 10.2 | 11.5 | 7.1 |
| May | 24° / 23° | 55 | 9.4 | 11 | 7.6 |
| Jun | 23° / 21° | 42 | 8.3 | 10.7 | 7.6 |
| Jul | 22° / 20° | 41 | 9.1 | 10.8 | 7.3 |
| Aug | 21° / 20° | 29 | 6.4 | 11.3 | 7.8 |
| Sep | 22° / 21° | 23 | 4.9 | 11.9 | 8.0 |
| Oct | 23° / 22° | 24 | 4.8 | 12.5 | 8.1 |
| Nov | 24° / 23° | 45 | 6 | 13 | 8.0 |
| Dec | 25° / 24° | 76 | 9.2 | 13.3 | 7.2 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Saint-Joseph gets about 800 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 5.3 months, from around Dec 11 to May 19, peaking in February at about 48% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Sep 27.
January is the wettest month by volume, with 144 mm over about 13 wet days; September is the driest, with 23 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 40 | 46 | 36 | 35 | 31 | 28 | 29 | 20 | 17 | 15 | 20 | 30 |
| Rain days | 13 | 13 | 11 | 10 | 9 | 8 | 9 | 6 | 5 | 5 | 6 | 9 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 40 | 13 |
| Feb | 46 | 13 |
| Mar | 36 | 11 |
| Apr | 35 | 10 |
| May | 31 | 9 |
| Jun | 28 | 8 |
| Jul | 29 | 9 |
| Aug | 20 | 6 |
| Sep | 17 | 5 |
| Oct | 15 | 5 |
| Nov | 20 | 6 |
| Dec | 30 | 9 |
Monthly rainfall
Over a full year, Saint-Joseph collects about 800 mm of rain across 105 wet days — roughly 67 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 144 mm, while September is the driest at just 23 mm. The three wettest months alone bring about 50% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 144 | 134 | 125 | 63 | 55 | 42 | 41 | 29 | 23 | 24 | 45 | 76 |
| Rain days | 13 | 13 | 11 | 10 | 9 | 8 | 9 | 6 | 5 | 5 | 6 | 9 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 144 | 13 |
| Feb | 134 | 13 |
| Mar | 125 | 11 |
| Apr | 63 | 10 |
| May | 55 | 9 |
| Jun | 42 | 8 |
| Jul | 41 | 9 |
| Aug | 29 | 6 |
| Sep | 23 | 5 |
| Oct | 24 | 5 |
| Nov | 45 | 6 |
| Dec | 76 | 9 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Saint-Joseph, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around April 26 and lasts for 6.8 months, ending around November 17. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 94% of the time on average.
The cloudier part of the year begins around November 18 and lasts for 5.2 months, ending around April 25. The cloudiest month is January, when it is overcast or mostly cloudy 45% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 55 | 58 | 65 | 75 | 85 | 92 | 92 | 94 | 93 | 85 | 78 | 64 |
| Cloudier (%) | 45 | 42 | 35 | 25 | 15 | 8 | 8 | 6 | 7 | 15 | 22 | 36 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 55 | 45 |
| Feb | 58 | 42 |
| Mar | 65 | 35 |
| Apr | 75 | 25 |
| May | 85 | 15 |
| Jun | 92 | 8 |
| Jul | 92 | 8 |
| Aug | 94 | 6 |
| Sep | 93 | 7 |
| Oct | 85 | 15 |
| Nov | 78 | 22 |
| Dec | 64 | 36 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 13 h 18 min of light; the shortest, around June 7, only 10 h 42 min — a swing of roughly 2 h 36 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.2 | 12.7 | 12.2 | 11.5 | 11.0 | 10.7 | 10.8 | 11.3 | 11.9 | 12.5 | 13.0 | 13.3 |
| Sunrise (AM) | 5:52 | 6:10 | 6:23 | 6:32 | 6:44 | 6:57 | 6:59 | 6:44 | 6:15 | 5:48 | 5:32 | 5:35 |
| Sunset (PM) | 7:02 | 6:54 | 6:32 | 6:03 | 5:43 | 5:39 | 5:48 | 5:59 | 6:08 | 6:18 | 6:34 | 6:53 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 13.2 | 5:52 | 7:02 |
| Feb | 12.7 | 6:10 | 6:54 |
| Mar | 12.2 | 6:23 | 6:32 |
| Apr | 11.5 | 6:32 | 6:03 |
| May | 11.0 | 6:44 | 5:43 |
| Jun | 10.7 | 6:57 | 5:39 |
| Jul | 10.8 | 6:59 | 5:48 |
| Aug | 11.3 | 6:44 | 5:59 |
| Sep | 11.9 | 6:15 | 6:08 |
| Oct | 12.5 | 5:48 | 6:18 |
| Nov | 13.0 | 5:32 | 6:34 |
| Dec | 13.3 | 5:35 | 6:53 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Saint-Joseph averages about 19 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 12 and 25 days.
The sunnier stretch runs 6.0 months, from around Apr 29 to Oct 29. The sunniest month is August, with roughly 25 sunny days (brilliant).
The greyest month is January, down near 12 sunny days — about 50% fewer than the August peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 13 | 12 | 16 | 18 | 22 | 24 | 24 | 25 | 24 | 21 | 19 | 15 |
| Sky | Mixed | Mixed | Bright | Bright | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Bright | Bright | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 13 | Mixed |
| Feb | 12 | Mixed |
| Mar | 16 | Bright |
| Apr | 18 | Bright |
| May | 22 | Bright |
| Jun | 24 | Brilliant |
| Jul | 24 | Brilliant |
| Aug | 25 | Brilliant |
| Sep | 24 | Brilliant |
| Oct | 21 | Bright |
| Nov | 19 | Bright |
| Dec | 15 | Mixed |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Saint-Joseph, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 7.5 months, from around October 16 to June 1. The muggiest month is January, when the air feels humid, muggy or worse about 100% of the time.
The most comfortable stretch runs from around June 2 to October 15, and July is the most comfortable month — the air is dry or comfortable 38% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 3 | 2 | 1 | 0 | 0 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 6 | 22 | 35 | 34 | 24 | 11 | 3 | 0 |
| Humid (%) | 0 | 0 | 1 | 5 | 26 | 49 | 51 | 55 | 60 | 43 | 18 | 3 |
| Muggy (%) | 13 | 10 | 17 | 36 | 56 | 28 | 11 | 8 | 14 | 43 | 62 | 37 |
| Oppressive (%) | 82 | 81 | 78 | 58 | 13 | 0 | 0 | 0 | 0 | 2 | 17 | 58 |
| Miserable (%) | 4 | 9 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| Jan | 0 | 0 | 0 | 13 | 82 | 4 |
| Feb | 0 | 0 | 0 | 10 | 81 | 9 |
| Mar | 0 | 0 | 1 | 17 | 78 | 4 |
| Apr | 0 | 0 | 5 | 36 | 58 | 0 |
| May | 0 | 6 | 26 | 56 | 13 | 0 |
| Jun | 1 | 22 | 49 | 28 | 0 | 0 |
| Jul | 3 | 35 | 51 | 11 | 0 | 0 |
| Aug | 3 | 34 | 55 | 8 | 0 | 0 |
| Sep | 2 | 24 | 60 | 14 | 0 | 0 |
| Oct | 1 | 11 | 43 | 43 | 2 | 0 |
| Nov | 0 | 3 | 18 | 62 | 17 | 0 |
| Dec | 0 | 0 | 3 | 37 | 58 | 1 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Saint-Joseph is typically breezy, near 21 km/h, and varies moderately with the seasons.
The windier part of the year lasts 4.6 months, from around May 29 to Oct 14. The windiest month is July, averaging about 25 km/h (breezy).
The calmer part of the year runs from around Oct 15 to Apr 4, with December the calmest month at about 18 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 19 | 20 | 21 | 21 | 21 | 23 | 25 | 24 | 23 | 21 | 19 | 18 |
| Feels | light breeze | light breeze | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 19 | light breeze |
| Feb | 20 | light breeze |
| Mar | 21 | breezy |
| Apr | 21 | breezy |
| May | 21 | breezy |
| Jun | 23 | breezy |
| Jul | 25 | breezy |
| Aug | 24 | breezy |
| Sep | 23 | breezy |
| Oct | 21 | breezy |
| Nov | 19 | light breeze |
| Dec | 18 | light breeze |
Hazard calendar for Saint-Joseph
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
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.
Best time to visit Saint-Joseph
To characterize how pleasant the weather is in Saint-Joseph throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late March, Saint-Joseph is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Saint-Joseph for general outdoor tourist activities is from mid March to late December, with a peak score in the last week of September.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 6.4 | 6.1 | 6.7 | 7.1 | 7.6 | 7.6 | 7.3 | 7.8 | 8.0 | 8.1 | 8.0 | 7.1 |
| Rating | good | good | good | good | ideal | ideal | good | ideal | ideal | ideal | ideal | good |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 6.4 | good |
| Feb | 6.1 | good |
| Mar | 6.7 | good |
| Apr | 7.1 | good |
| May | 7.6 | ideal |
| Jun | 7.6 | ideal |
| Jul | 7.3 | good |
| Aug | 7.8 | ideal |
| Sep | 8.0 | ideal |
| Oct | 8.1 | ideal |
| Nov | 8.0 | ideal |
| Dec | 7.1 | good |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Saint-Joseph for hot-weather activities is from mid September to late June, with a peak score in the third week of November.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Saint-Joseph, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
Saint-Joseph packs about the same all year — highs hold near 26°C. Across the year the things worth having are light clothes, rain gear, sun protection and a windbreaker.
In February, Saint-Joseph sees daytime highs around 26°C and nights near 25°C. Pack rain gear and sun protection. Worth having: light clothes. About 13 days see rain.
Sea temperature near Saint-Joseph
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 28 | 27 | 26 | 25 | 24 | 23 | 23 | 24 | 25 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Warm |
| Mar | 28 | Warm |
| Apr | 27 | Warm |
| May | 26 | Warm |
| Jun | 25 | Warm |
| Jul | 24 | Refreshing |
| Aug | 23 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 24 | Warm |
| Nov | 25 | Warm |
| Dec | 27 | Warm |
UV index (midday) in Saint-Joseph by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 17 | 15 | 13 | 10 | 8 | 6 | 6 | 9 | 10 | 12 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | High | High | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 17 | Extreme |
| Feb | 15 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Extreme |
| 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 |
Average hourly UV index in Saint-Joseph
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 9 | 9 | 8 | 7 | 6.5 | 5.5 | 5.5 | 6.5 | 7.5 | 8 | 8.5 | 9 |
| UV ≥ 6 (h/day) | 7.5 | 7 | 6 | 5 | 3.5 | 2 | 2 | 4 | 5 | 6 | 6.5 | 7 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 9 | 7.5 |
| Feb | 9 | 7 |
| Mar | 8 | 6 |
| Apr | 7 | 5 |
| May | 6.5 | 3.5 |
| Jun | 5.5 | 2 |
| Jul | 5.5 | 2 |
| Aug | 6.5 | 4 |
| Sep | 7.5 | 5 |
| Oct | 8 | 6 |
| Nov | 8.5 | 6.5 |
| Dec | 9 | 7 |
Growing season
Saint-Joseph is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Saint-Joseph banks about 4,863 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 486 | 443 | 482 | 443 | 414 | 359 | 340 | 336 | 334 | 373 | 397 | 456 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 486 |
| Feb | 443 |
| Mar | 482 |
| Apr | 443 |
| May | 414 |
| Jun | 359 |
| Jul | 340 |
| Aug | 336 |
| Sep | 334 |
| Oct | 373 |
| Nov | 397 |
| Dec | 456 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Saint-Joseph receives about 5.6 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.8 and 7.1 kWh/m².
The brighter stretch of the year lasts 6.6 months, from around Sep 9 to Mar 28. The brightest month is November, averaging about 7.1 kWh/m² (intense).
The dimmest month is June, down near 3.9 kWh/m² — roughly 45% less than the November peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.6 | 6.4 | 5.8 | 5.1 | 4.3 | 3.9 | 4.0 | 4.8 | 5.9 | 6.7 | 7.1 | 7.0 |
| Level | Intense | Intense | Bright | Bright | Bright | Moderate | Bright | Bright | Bright | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 6.6 | Intense |
| Feb | 6.4 | Intense |
| Mar | 5.8 | Bright |
| Apr | 5.1 | Bright |
| May | 4.3 | Bright |
| Jun | 3.9 | Moderate |
| Jul | 4.0 | Bright |
| Aug | 4.8 | Bright |
| Sep | 5.9 | Bright |
| Oct | 6.7 | Intense |
| Nov | 7.1 | Intense |
| Dec | 7.0 | Intense |
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.
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.
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).