Groningen, Suriname climate

Af Tropical rainforest

Groningen has a remarkably steady tropical climate (Tropical rainforest, Köppen Af). The hottest month is October with an average daily high near 34°C, while the coldest is January averaging around 22°C at night. Around 2143 mm of precipitation falls each year, peaking in May (318 mm) and easing off in October (80 mm).

☀️ All year

Hot

Daytime highs near 34°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 22°C.

🌧️ Rain

Very wet

About 2143 mm of rain a year.

Wettest in May

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

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)

Groningen climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	31	31	31	32	31	31	32	33	34	34	33	32
Avg temp (°C)	26	27	27	27	27	27	27	28	28	29	28	27
Avg low (°C)	22	22	22	23	23	23	23	23	23	23	23	23
Precipitation (mm)	193	168	148	201	318	284	219	145	96	80	113	177

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	31	31	31	32	31	31
Avg temp (°C)	26	27	27	27	27	27
Avg low (°C)	22	22	22	23	23	23
Precipitation (mm)	193	168	148	201	318	284

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	32	33	34	34	33	32
Avg temp (°C)	27	28	28	29	28	27
Avg low (°C)	23	23	23	23	23	23
Precipitation (mm)	219	145	96	80	113	177

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	64	69	66	71	75	69	60	50	41	48	58	64
Relative humidity (%)	84	82	81	84	90	92	91	87	77	72	76	83
Wind speed (m/s)	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	64	69	66	71	75	69
Relative humidity (%)	84	82	81	84	90	92
Wind speed (m/s)	0.1	0.1	0.1	0.1	0.1	0.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	60	50	41	48	58	64
Relative humidity (%)	91	87	77	72	76	83
Wind speed (m/s)	0.1	0.1	0.1	0.1	0.1	0.1

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Johan A Pengel Intl, a weather station, about 49 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 →