Climate averages 1991–2020

Colón weather
in September.

A hot, very wet month: the joint 3rd warmest and the 8th driest of the year.

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

Average high 28.3°C Daytime mean, September

Average low 24.2°C Night-time mean, September

Rainfall 300 mm 30 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

September is a hot month in Colón: daytime highs average 28.3°C and nights cool to about 24.2°C. By daytime temperature it is the joint 3rd warmest of the 12 months.

Expect about 300 mm of rain on roughly 30 days, which makes September a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 11 min on an average September day.

The nearest other city in this atlas is Arraiján (55 km away). In September its highs average 27.9°C, about as warm as Colón, with 269 mm of rain.

Among the 6 cities listed in Panama, Colón ranks 4th of 6 for the warmest September highs and 5th of 6 for the driest September (rainfall, lowest first). The mean September high of those 6 cities is 28.3°C; Colón is level with that mean.

From September to October, average highs fall by 0.2°C to 28.1°C, and monthly rainfall rises from 300 mm to 320 mm.

The annual picture

September 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

Colón climate table

1991–2020

Monthly climate averages for Colón, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	27.4°C24.8°C	24.8°C	63	15.4	11.612 h
February	27.6°C24.8°C	24.8°C	36	9.9	11.812 h
March	27.9°C24.9°C	24.9°C	41	11.6	12.112 h
April	28.3°C25.1°C	25.1°C	127	20.1	12.312 h
May	28.4°C24.7°C	24.7°C	284	29.4	12.513 h
June	28.5°C24.5°C	24.5°C	289	29.4	12.713 h
July	28.1°C24.4°C	24.4°C	334	30.5	12.613 h
August	28.2°C24.3°C	24.3°C	325	30.6	12.412 h
September, selected	28.3°C24.2°C	24.2°C	300	29.5	12.212 h
October	28.1°C24.1°C	24.1°C	320	30.1	11.912 h
November	27.5°C24.0°C	24.0°C	341	29.0	11.712 h
December	27.4°C24.6°C	24.6°C	190	25.5	11.612 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

September in nearby cities

Distance from Colón

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