Climate averages 1991–2020

Basseterre weather
in August.

A hot, wet month: one of the warmest and the 9th driest of the year.

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

Average high 28.5°C Daytime mean, August

Average low 26.3°C Night-time mean, August

Rainfall 91 mm 17 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

August is a hot month in Basseterre: daytime highs average 28.5°C and nights cool to about 26.3°C. By daytime temperature it is one of the warmest months of the year.

Expect about 91 mm of rain on roughly 17 days, which makes August a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 43 min on an average August day.

The nearest other city in this atlas is Saint John’s (96 km away). In August its highs average 28.8°C, about as warm as Basseterre, with 98 mm of rain.

From August to September, average highs fall by 0.1°C to 28.5°C, and monthly rainfall rises from 91 mm to 118 mm.

The annual picture

August 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

Basseterre climate table

1991–2020

Monthly climate averages for Basseterre, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	25.9°C24.1°C	24.1°C	30	10.3	11.211 h
February	25.8°C23.9°C	23.9°C	21	7.4	11.612 h
March	26.1°C24.0°C	24.0°C	20	6.8	12.012 h
April	26.8°C24.5°C	24.5°C	33	8.5	12.513 h
May	27.5°C25.4°C	25.4°C	61	11.9	12.913 h
June	28.2°C26.0°C	26.0°C	47	10.9	13.113 h
July	28.3°C26.1°C	26.1°C	74	14.5	13.113 h
August, selected	28.5°C26.3°C	26.3°C	91	17.0	12.713 h
September	28.5°C26.3°C	26.3°C	118	17.6	12.212 h
October	28.1°C26.0°C	26.0°C	125	17.8	11.812 h
November	27.3°C25.4°C	25.4°C	105	15.8	11.311 h
December	26.4°C24.7°C	24.7°C	54	13.2	11.111 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

August in nearby cities

Distance from Basseterre

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 Basseterre) is explained once on the Basseterre year overview and on the Sources, method and limits page.