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Antsiranana, Madagascar climate
Aw Tropical savanna (dry winter)
Antsiranana has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is December with an average daily high near 91°F, while the coldest is July averaging around 67°F at night. Precipitation totals about 44 inches a year and is strongly seasonal — March alone averages 10.3 inches while August barely receives 0.12 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Antsiranana climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 88 | 89 | 89 | 89 | 86 | 85 | 86 | 87 | 89 | 91 | 91 |
| Avg temp (°F) | 81 | 81 | 81 | 81 | 80 | 77 | 76 | 77 | 78 | 80 | 81 | 82 |
| Avg low (°F) | 73 | 73 | 73 | 73 | 71 | 68 | 67 | 67 | 68 | 70 | 72 | 73 |
| Precipitation (in) | 9.7 | 8.9 | 10.4 | 3.1 | 1.5 | 0.4 | 1.0 | 0.1 | 0.4 | 0.3 | 0.2 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 88 | 89 | 89 | 89 | 86 |
| Avg temp (°F) | 81 | 81 | 81 | 81 | 80 | 77 |
| Avg low (°F) | 73 | 73 | 73 | 73 | 71 | 68 |
| Precipitation (in) | 9.7 | 8.9 | 10.4 | 3.1 | 1.5 | 0.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 86 | 87 | 89 | 91 | 91 |
| Avg temp (°F) | 76 | 77 | 78 | 80 | 81 | 82 |
| Avg low (°F) | 67 | 67 | 68 | 70 | 72 | 73 |
| Precipitation (in) | 1.0 | 0.1 | 0.4 | 0.3 | 0.2 | 8.2 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 12 | 10 | 5 | 3 | 2 | 3 | 3 | 3 | 3 | 4 | 7 |
| Days with high ≥ 90°F (days) | 12 | 9 | 11 | 14 | 9 | 2 | 0.3 | 0.4 | 2 | 10 | 19 | 20 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 12 | 10 | 5 | 3 | 2 |
| Days with high ≥ 90°F (days) | 12 | 9 | 11 | 14 | 9 | 2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 3 | 3 | 4 | 7 |
| Days with high ≥ 90°F (days) | 0.3 | 0.4 | 2 | 10 | 19 | 20 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 70 | 64 | 52 | 43 | 48 | 49 | 46 | 39 | 38 | 45 | 59 |
| Relative humidity (%) | 83 | 85 | 86 | 84 | 81 | 79 | 77 | 76 | 73 | 73 | 73 | 77 |
| Wind speed (mph) | 7.4 | 7.1 | 7.5 | 9.5 | 10.9 | 12.5 | 13.6 | 14.0 | 14.0 | 13.1 | 11.2 | 8.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 70 | 64 | 52 | 43 | 48 |
| Relative humidity (%) | 83 | 85 | 86 | 84 | 81 | 79 |
| Wind speed (mph) | 7.4 | 7.1 | 7.5 | 9.5 | 10.9 | 12.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 49 | 46 | 39 | 38 | 45 | 59 |
| Relative humidity (%) | 77 | 76 | 73 | 73 | 73 | 77 |
| Wind speed (mph) | 13.6 | 14.0 | 14.0 | 13.1 | 11.2 | 8.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Antsiranana, a weather station, about 4 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.