Climate averages 1991–2020

Cayenne weather
in July.

A hot, very wet month: the 5th warmest and the 6th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 28.9°C Daytime mean, July

Average low 23.2°C Night-time mean, July

Rainfall 186 mm 25 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

July is a hot month in Cayenne: daytime highs average 28.9°C and nights cool to about 23.2°C. By daytime temperature it is the 5th warmest of the 12 months.

Expect about 186 mm of rain on roughly 25 days, which makes July a very wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 23 min on an average July day.

The nearest other city in this atlas is Paramaribo (330 km away). In July its highs average 29.2°C, about as warm as Cayenne, with 214 mm of rain.

From July to August, average highs rise by 1.2°C to 30.1°C, and monthly rainfall falls from 186 mm to 67 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Cayenne climate table

1991–2020

Monthly climate averages for Cayenne, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	27.6°C23.3°C	23.3°C	244	26.6	11.912 h
February	27.6°C23.5°C	23.5°C	205	22.5	12.012 h
March	28.1°C23.8°C	23.8°C	173	23.9	12.112 h
April	28.3°C23.8°C	23.8°C	257	25.0	12.212 h
May	28.2°C23.6°C	23.6°C	411	29.1	12.312 h
June	28.3°C23.2°C	23.2°C	343	28.5	12.412 h
July, selected	28.9°C23.2°C	23.2°C	186	24.8	12.412 h
August	30.1°C23.7°C	23.7°C	67	13.9	12.312 h
September	31.3°C24.2°C	24.2°C	23	7.2	12.112 h
October	31.5°C24.3°C	24.3°C	39	10.1	12.012 h
November	30.1°C24.1°C	24.1°C	122	19.6	11.912 h
December	28.4°C23.6°C	23.6°C	253	26.5	11.812 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Cayenne

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Cayenne) is explained once on the Cayenne year overview and on the Sources, method and limits page.