Fomboni, Comoros climate

Am Tropical monsoon

Fomboni has a remarkably steady tropical climate (Tropical monsoon, Köppen Am). The hottest month is December with an average daily high near 90°F, while the coldest is August averaging around 69°F at night. Precipitation totals about 91 inches a year and is strongly seasonal — January alone averages 18.1 inches while August barely receives 1.24 inches.

☀️ All year

Hot

Daytime highs near 90°F most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 69°F.

🌧️ Rain

Very wet

About 91 in of rain a year.

Wettest in January

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Fomboni climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	88	88	89	89	88	86	85	84	85	87	89	90
Avg temp (°F)	82	82	82	82	81	79	77	77	78	80	82	83
Avg low (°F)	76	76	76	75	73	71	69	69	70	73	75	76
Precipitation (in)	18.1	12.4	15.2	11.1	3.6	1.7	1.9	1.2	3.7	3.5	5.2	13.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	88	88	89	89	88	86
Avg temp (°F)	82	82	82	82	81	79
Avg low (°F)	76	76	76	75	73	71
Precipitation (in)	18.1	12.4	15.2	11.1	3.6	1.7

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	85	84	85	87	89	90
Avg temp (°F)	77	77	78	80	82	83
Avg low (°F)	69	69	70	73	75	76
Precipitation (in)	1.9	1.2	3.7	3.5	5.2	13.5

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	66	67	59	48	39	37	39	35	34	33	34	48
Relative humidity (%)	80	81	79	77	76	74	74	74	74	76	77	78
Wind speed (mph)	9.6	8.8	7.3	8.6	10.4	11.2	11.2	8.9	7.9	8.4	8.4	7.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	66	67	59	48	39	37
Relative humidity (%)	80	81	79	77	76	74
Wind speed (mph)	9.6	8.8	7.3	8.6	10.4	11.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	39	35	34	33	34	48
Relative humidity (%)	74	74	74	76	77	78
Wind speed (mph)	11.2	8.9	7.9	8.4	8.4	7.6

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Prince Said Ibrahim, a weather station, about 98 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.

How we build these numbers →