Climate and average weather in Toamasina
In Toamasina, the weather is muggy, warm, wet, and partly cloudy and remarkably steady, with daytime highs holding near warm levels all year. The wettest stretch peaks around March.
Over the course of the year, the temperature in Toamasina typically varies from 21°C to 27°C, and is rarely below 20°C or above 29°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 Toamasina for warm-weather activities is from early August to mid December.
- Hottest
- Feb
- 27°
- Coldest
- Aug
- 21°
- Wettest
- Mar
- 346 mm
- Driest
- Sep
- 76 mm
- Rain / yr
- 2256 mm
- 264 wet days
- Daylight
- 10.9–13.1 h
- shortest–longest
- Elevation
- 12 m
- 18.1°S
- Clearest
- Sep
- 35% cloud
Toamasina is port city in eastern Madagascar.
- Density
- 17,255/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Toamasina 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 early August to mid December.
Temperature through the year
Daily average highs and lows in Toamasina, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in Toamasina stay fairly even through the year, without a distinct hot or cool season. The warmest month is February, with an average high of 27°C and low of 26°C; the coolest is August, with an average low of 21°C and high of 23°C.
Days typically run about 2°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 26 | 25 | 24 | 23 | 23 | 23 | 24 | 26 | 27 |
| Avg low (°C) | 26 | 26 | 25 | 25 | 24 | 22 | 21 | 21 | 22 | 23 | 24 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 27 | 26 |
| Feb | 27 | 26 |
| Mar | 27 | 25 |
| Apr | 26 | 25 |
| May | 25 | 24 |
| Jun | 24 | 22 |
| Jul | 23 | 21 |
| Aug | 23 | 21 |
| Sep | 23 | 22 |
| Oct | 24 | 23 |
| Nov | 26 | 24 |
| Dec | 27 | 25 |
Average hourly temperature in Toamasina
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 27°C, and coldest before dawn in August, near 21°C.
Toamasina 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 | 27° / 26° | 305 | 25 | 13 | 4.2 |
| Feb | 27° / 26° | 320 | 23 | 12.6 | 4.2 |
| Mar | 27° / 25° | 346 | 26.2 | 12.1 | 4.2 |
| Apr | 26° / 25° | 200 | 24.2 | 11.6 | 4.6 |
| May | 25° / 24° | 201 | 23.5 | 11.2 | 5.0 |
| Jun | 24° / 22° | 174 | 24.2 | 10.9 | 4.9 |
| Jul | 23° / 21° | 180 | 24.3 | 11 | 4.9 |
| Aug | 23° / 21° | 112 | 20.8 | 11.4 | 5.5 |
| Sep | 23° / 22° | 76 | 17.7 | 11.9 | 6.1 |
| Oct | 24° / 23° | 77 | 17 | 12.4 | 6.3 |
| Nov | 26° / 24° | 79 | 16.1 | 12.9 | 6.1 |
| Dec | 27° / 25° | 186 | 22 | 13.1 | 4.9 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Toamasina gets about 2256 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.
The wetter season lasts 7.5 months, from around Dec 18 to Aug 2, peaking in March at about 86% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Nov 6.
March is the wettest month by volume, with 346 mm over about 26 wet days; September is the driest, with 76 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 81 | 82 | 85 | 80 | 76 | 80 | 78 | 68 | 59 | 54 | 54 | 71 |
| Rain days | 25 | 23 | 26 | 24 | 24 | 24 | 24 | 21 | 18 | 17 | 16 | 22 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 81 | 25 |
| Feb | 82 | 23 |
| Mar | 85 | 26 |
| Apr | 80 | 24 |
| May | 76 | 24 |
| Jun | 80 | 24 |
| Jul | 78 | 24 |
| Aug | 68 | 21 |
| Sep | 59 | 18 |
| Oct | 54 | 17 |
| Nov | 54 | 16 |
| Dec | 71 | 22 |
Monthly rainfall
Over a full year, Toamasina collects about 2256 mm of rain across 264 wet days — roughly 188 mm in an average month.
It doesn’t fall evenly. March is the wettest month with 346 mm, while September is the driest at just 76 mm. The three wettest months alone bring about 43% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 305 | 320 | 346 | 200 | 201 | 174 | 180 | 112 | 76 | 77 | 79 | 186 |
| Rain days | 25 | 23 | 26 | 24 | 24 | 24 | 24 | 21 | 18 | 17 | 16 | 22 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 305 | 25 |
| Feb | 320 | 23 |
| Mar | 346 | 26 |
| Apr | 200 | 24 |
| May | 201 | 24 |
| Jun | 174 | 24 |
| Jul | 180 | 24 |
| Aug | 112 | 21 |
| Sep | 76 | 18 |
| Oct | 77 | 17 |
| Nov | 79 | 16 |
| Dec | 186 | 22 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Toamasina, 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 9 and lasts for 7.7 months, ending around November 29. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 88% of the time on average.
The cloudier part of the year begins around November 30 and lasts for 4.3 months, ending around April 8. The cloudiest month is January, when it is overcast or mostly cloudy 64% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 36 | 40 | 51 | 70 | 75 | 72 | 73 | 82 | 88 | 83 | 74 | 55 |
| Cloudier (%) | 64 | 60 | 49 | 30 | 25 | 28 | 27 | 18 | 12 | 17 | 26 | 45 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 36 | 64 |
| Feb | 40 | 60 |
| Mar | 51 | 49 |
| Apr | 70 | 30 |
| May | 75 | 25 |
| Jun | 72 | 28 |
| Jul | 73 | 27 |
| Aug | 82 | 18 |
| Sep | 88 | 12 |
| Oct | 83 | 17 |
| Nov | 74 | 26 |
| Dec | 55 | 45 |
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 06 min of light; the shortest, around June 8, only 10 h 54 min — a swing of roughly 2 h 12 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.0 | 12.6 | 12.1 | 11.6 | 11.2 | 10.9 | 11.0 | 11.4 | 11.9 | 12.4 | 12.9 | 13.1 |
| Sunrise (AM) | 5:22 | 5:39 | 5:48 | 5:55 | 6:04 | 6:15 | 6:18 | 6:05 | 5:40 | 5:15 | 5:02 | 5:06 |
| Sunset (PM) | 6:21 | 6:15 | 5:56 | 5:30 | 5:13 | 5:10 | 5:18 | 5:28 | 5:34 | 5:40 | 5:54 | 6:11 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 13.0 | 5:22 | 6:21 |
| Feb | 12.6 | 5:39 | 6:15 |
| Mar | 12.1 | 5:48 | 5:56 |
| Apr | 11.6 | 5:55 | 5:30 |
| May | 11.2 | 6:04 | 5:13 |
| Jun | 10.9 | 6:15 | 5:10 |
| Jul | 11.0 | 6:18 | 5:18 |
| Aug | 11.4 | 6:05 | 5:28 |
| Sep | 11.9 | 5:40 | 5:34 |
| Oct | 12.4 | 5:15 | 5:40 |
| Nov | 12.9 | 5:02 | 5:54 |
| Dec | 13.1 | 5:06 | 6:11 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Toamasina averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 7 and 21 days.
The sunnier stretch runs 4.2 months, from around Aug 5 to Dec 9. The sunniest month is September, with roughly 19 sunny days (bright).
The greyest month is January, down near 7 sunny days — about 62% fewer than the September peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 7 | 7 | 10 | 13 | 14 | 11 | 11 | 16 | 19 | 20 | 17 | 12 |
| Sky | Gloomy | Gloomy | Mixed | Mixed | Mixed | Mixed | Mixed | Bright | Bright | Bright | Bright | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 7 | Gloomy |
| Feb | 7 | Gloomy |
| Mar | 10 | Mixed |
| Apr | 13 | Mixed |
| May | 14 | Mixed |
| Jun | 11 | Mixed |
| Jul | 11 | Mixed |
| Aug | 16 | Bright |
| Sep | 19 | Bright |
| Oct | 20 | Bright |
| Nov | 17 | Bright |
| Dec | 12 | 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.
Toamasina is humid all year round — on a typical day the air feels at least humid, and there is no real dry season to wait for.
The stickiest month is January, when it feels muggy, oppressive or miserable about 100% of the time. Even in August, the mildest month, the air is dry or comfortable only 9% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 2 | 7 | 9 | 7 | 2 | 1 | 0 |
| Humid (%) | 0 | 0 | 0 | 1 | 5 | 27 | 47 | 52 | 40 | 20 | 5 | 0 |
| Muggy (%) | 2 | 1 | 4 | 14 | 48 | 64 | 45 | 38 | 52 | 61 | 43 | 11 |
| Oppressive (%) | 74 | 73 | 78 | 82 | 46 | 7 | 0 | 0 | 1 | 16 | 50 | 78 |
| Miserable (%) | 25 | 26 | 18 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 11 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| Jan | 0 | 0 | 2 | 74 | 25 |
| Feb | 0 | 0 | 1 | 73 | 26 |
| Mar | 0 | 0 | 4 | 78 | 18 |
| Apr | 0 | 1 | 14 | 82 | 3 |
| May | 0 | 5 | 48 | 46 | 0 |
| Jun | 2 | 27 | 64 | 7 | 0 |
| Jul | 7 | 47 | 45 | 0 | 0 |
| Aug | 9 | 52 | 38 | 0 | 0 |
| Sep | 7 | 40 | 52 | 1 | 0 |
| Oct | 2 | 20 | 61 | 16 | 0 |
| Nov | 1 | 5 | 43 | 50 | 1 |
| Dec | 0 | 0 | 11 | 78 | 11 |
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 Toamasina is typically light breeze, near 16 km/h, and varies moderately with the seasons.
The windier part of the year lasts 4.5 months, from around Mar 30 to Aug 12. The windiest month is July, averaging about 19 km/h (light breeze).
The calmer part of the year runs from around Aug 13 to Jan 31, with September the calmest month at about 15 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 16 | 17 | 17 | 17 | 17 | 19 | 19 | 16 | 15 | 15 | 15 | 15 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 16 | light breeze |
| Feb | 17 | light breeze |
| Mar | 17 | light breeze |
| Apr | 17 | light breeze |
| May | 17 | light breeze |
| Jun | 19 | light breeze |
| Jul | 19 | light breeze |
| Aug | 16 | light breeze |
| Sep | 15 | light breeze |
| Oct | 15 | light breeze |
| Nov | 15 | light breeze |
| Dec | 15 | light breeze |
Hazard calendar for Toamasina
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Toamasina sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Toamasina's rainy season runs December–July, when most of the year's rain falls.
Best time to visit Toamasina
To characterize how pleasant the weather is in Toamasina throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid August, Toamasina 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 Toamasina for general outdoor tourist activities is from early August to mid December, with a peak score in the third week of October.
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) | 4.2 | 4.2 | 4.2 | 4.6 | 5.0 | 4.9 | 4.9 | 5.5 | 6.1 | 6.3 | 6.0 | 4.9 |
| Rating | fair | fair | fair | fair | fair | fair | fair | fair | good | good | good | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 4.2 | fair |
| Feb | 4.2 | fair |
| Mar | 4.2 | fair |
| Apr | 4.6 | fair |
| May | 5.0 | fair |
| Jun | 4.9 | fair |
| Jul | 4.9 | fair |
| Aug | 5.5 | fair |
| Sep | 6.1 | good |
| Oct | 6.3 | good |
| Nov | 6.0 | good |
| Dec | 4.9 | fair |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit Toamasina for hot-weather activities run from late April to mid May and again from mid September to late December, with a peak score in the second 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 Toamasina, 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.
Toamasina packs about the same all year — highs hold near 27°C. Across the year the things worth having are light clothes, rain gear and sun protection.
In February, Toamasina sees daytime highs around 27°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.
Sea temperature near Toamasina
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 24 km away) is warmest in February at about 29°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 | 29 | 28 | 28 | 27 | 26 | 25 | 24 | 24 | 25 | 26 | 28 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 29 | Tropical |
| Mar | 28 | Tropical |
| Apr | 28 | Tropical |
| May | 27 | Warm |
| Jun | 26 | Warm |
| Jul | 25 | Warm |
| Aug | 24 | Warm |
| Sep | 24 | Warm |
| Oct | 25 | Warm |
| Nov | 26 | Warm |
| Dec | 28 | Warm |
UV index (midday) in Toamasina 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 Toamasina peaks around February 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 7 (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) | 14 | 16 | 13 | 11 | 8 | 7 | 7 | 9 | 11 | 13 | 12 | 14 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | High | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 16 | Extreme |
| Mar | 13 | Extreme |
| Apr | 11 | Extreme |
| May | 8 | Very high |
| Jun | 7 | High |
| Jul | 7 | Very high |
| Aug | 9 | Very high |
| Sep | 11 | Extreme |
| Oct | 13 | Extreme |
| Nov | 12 | Extreme |
| Dec | 14 | Extreme |
Average hourly UV index in Toamasina
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 February the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 7 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) | 8.5 | 8.5 | 8 | 7.5 | 6.5 | 6 | 6 | 7 | 7.5 | 8 | 8.5 | 8.5 |
| UV ≥ 6 (h/day) | 7 | 7 | 6 | 5.5 | 4 | 2.5 | 3 | 4.5 | 5.5 | 6 | 6.5 | 7 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 8.5 | 7 |
| Feb | 8.5 | 7 |
| Mar | 8 | 6 |
| Apr | 7.5 | 5.5 |
| May | 6.5 | 4 |
| Jun | 6 | 2.5 |
| Jul | 6 | 3 |
| Aug | 7 | 4.5 |
| Sep | 7.5 | 5.5 |
| Oct | 8 | 6 |
| Nov | 8.5 | 6.5 |
| Dec | 8.5 | 7 |
Growing season
Toamasina 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. Toamasina banks about 5,251 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) | 509 | 463 | 502 | 466 | 445 | 390 | 375 | 372 | 375 | 421 | 442 | 491 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 509 |
| Feb | 463 |
| Mar | 502 |
| Apr | 466 |
| May | 445 |
| Jun | 390 |
| Jul | 375 |
| Aug | 372 |
| Sep | 375 |
| Oct | 421 |
| Nov | 442 |
| Dec | 491 |
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.
Toamasina receives about 5.0 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 3.4 and 6.4 kWh/m².
The brighter stretch of the year lasts 6.5 months, from around Sep 11 to Mar 26. The brightest month is December, averaging about 6.3 kWh/m² (intense).
The dimmest month is June, down near 3.4 kWh/m² — roughly 45% less than the December peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.8 | 5.5 | 5.1 | 4.6 | 3.9 | 3.4 | 3.5 | 4.3 | 5.1 | 5.9 | 6.3 | 6.3 |
| Level | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate | Bright | Bright | Bright | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 5.8 | Bright |
| Feb | 5.5 | Bright |
| Mar | 5.1 | Bright |
| Apr | 4.6 | Bright |
| May | 3.9 | Moderate |
| Jun | 3.4 | Moderate |
| Jul | 3.5 | Moderate |
| Aug | 4.3 | Bright |
| Sep | 5.1 | Bright |
| Oct | 5.9 | Bright |
| Nov | 6.3 | Intense |
| Dec | 6.3 | Intense |
Where is Toamasina?
Toamasina sits at 18.1°S, 49.4°E, 12 m above sea level, in Madagascar. The nearest listed city is Vavatenina, 79 km away.
Topography around Toamasina
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Toamasina.
Within 3 km, the terrain around Toamasina has only modest variations in elevation — a maximum elevation change of 15 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 201 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,456 m.
The land around Toamasina is covered by artificial surfaces (47%) and water (25%) within 3 km, water (54%) and trees (29%) within 16 km, and trees (49%) and water (37%) within 80 km.
Madagascar travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 220 V · 50 Hz
- Prices
- ≈ 31% of US
- price level, 2025
- GDP per capita
- $599
- 2025
- Happiness
- 4.2 / 10
- World Happiness, 2025
- Safe drinking water
- 22%
- of population, 2024
- Road deaths
- 29.2
- per 100k/yr, 2019
- Income group
- Low
- World Bank
- English
- Low
- EF EPI 457
- Religion
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 Toamasina (-18.1492°, 49.4023°, elevation 12 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).