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Fort Wellington, Guyana climate

Am Tropical monsoon

Fort Wellington has a remarkably steady tropical climate (Tropical monsoon, Köppen Am). The hottest month is September with an average daily high near 32°C, while the coldest is January averaging around 24°C at night. Precipitation totals about 1487 mm a year and is strongly seasonal — June alone averages 232 mm while September barely receives 55 mm.

☀️ All year

Hot

Daytime highs near 32°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 24°C.

🌧️ Rain

Wet

About 1487 mm of rain a year.

Wettest in June

⛅ Sky & trend

Often cloudy

Cloudy skies much of 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)

Fort Wellington climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	29	29	29	30	30	30	30	31	32	32	31	30
Avg temp (°C)	27	27	27	27	27	27	27	28	28	28	28	27
Avg low (°C)	24	24	24	25	25	24	24	24	24	24	24	24
Precipitation (mm)	111	89	85	144	207	232	203	100	55	62	65	134

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	29	29	29	30	30	30
Avg temp (°C)	27	27	27	27	27	27
Avg low (°C)	24	24	24	25	25	24
Precipitation (mm)	111	89	85	144	207	232

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	30	31	32	32	31	30
Avg temp (°C)	27	28	28	28	28	27
Avg low (°C)	24	24	24	24	24	24
Precipitation (mm)	203	100	55	62	65	134

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	65	69	66	72	76	73	66	57	50	53	61	65
Relative humidity (%)	81	80	79	81	86	88	87	85	81	79	80	82
Wind speed (m/s)	2.5	2.6	2.5	2.4	2.2	2.0	1.8	1.8	2.0	2.1	2.2	2.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	65	69	66	72	76	73
Relative humidity (%)	81	80	79	81	86	88
Wind speed (m/s)	2.5	2.6	2.5	2.4	2.2	2.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	66	57	50	53	61	65
Relative humidity (%)	87	85	81	79	80	82
Wind speed (m/s)	1.8	1.8	2.0	2.1	2.2	2.4

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 19 years of daily observations at Nickerie, a weather station, about 80 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 →