How extreme does Antsiranana's weather get?

The hottest, coldest, wettest and snowiest days Antsiranana has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 50+ years of daily weather observations (1973–present), from the Antsiranana station 4 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Antsiranana has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

102°F Dec 13, 1979

That is about 11°F hotter than a normal December afternoon in Antsiranana (typical high near 91°F).

The three most extreme on record

1 102°F Dec 13, 1979

2 102°F Apr 7, 1982

3 102°F Nov 20, 2015

❄️ Coldest night

50°F Oct 1, 1978

About 20°F colder than a normal October night in Antsiranana (typical low near 70°F).

The three most extreme on record

1 50°F Oct 1, 1978

2 50°F Sep 7, 1984

3 51°F Sep 4, 1987

🌧️ Most rain in one day

18.98 in Mar 17, 1994

More rain in a single day than Antsiranana usually gets in the whole month of March (typical March total about 10.4 in).

The three most extreme on record

1 18.98 in Mar 17, 1994

2 14.57 in Mar 5, 1981

3 11.81 in Oct 2, 1976

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Antsiranana's record heat sits well above even a hot day for the season — December's 102°F is about 11°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Antsiranana's warmest days reach the low 90s°F and its coldest nights drop to the high 60s°F. But across the record it has gone as high as 102°F and as low as 50°F. A single day has delivered over 19 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.

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.

How we build these numbers →

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