Climate averages 1991–2020

Arraiján weather
in January.

A hot, fairly dry month: the 5th warmest and the 3rd driest of the year.

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

Average high 28.2°C Daytime mean, January

Average low 23.5°C Night-time mean, January

Rainfall 29 mm 8 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

January is a hot month in Arraiján: daytime highs average 28.2°C and nights cool to about 23.5°C. By daytime temperature it is the 5th warmest of the 12 months.

Expect about 29 mm of rain on roughly 8 days, which makes January a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 40 min on an average January day.

The nearest other city in this atlas is Panama City (15 km away). In January its highs average 29.1°C, 1.0°C warmer than Arraiján, with 17 mm of rain.

Among the 6 cities listed in Panama, Arraiján ranks 5th of 6 for the warmest January highs and 4th of 6 for the driest January (rainfall, lowest first). The mean January high of those 6 cities is 29.0°C; Arraiján is 0.9°C cooler than that mean.

From January to February, average highs rise by 0.7°C to 28.9°C, and monthly rainfall falls from 29 mm to 15 mm.

The annual picture

January 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

Arraiján climate table

1991–2020

Monthly climate averages for Arraiján, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	28.2°C23.5°C	23.5°C	29	8.4	11.712 h
February	28.9°C23.4°C	23.4°C	15	4.7	11.812 h
March	29.4°C23.6°C	23.6°C	18	5.4	12.112 h
April	29.2°C24.0°C	24.0°C	87	15.6	12.312 h
May	28.3°C23.9°C	23.9°C	234	28.9	12.513 h
June	28.1°C23.6°C	23.6°C	255	29.2	12.613 h
July	27.9°C23.5°C	23.5°C	280	30.2	12.613 h
August	28.0°C23.5°C	23.5°C	276	30.6	12.412 h
September	27.9°C23.3°C	23.3°C	269	29.6	12.212 h
October	27.6°C23.2°C	23.2°C	268	30.0	11.912 h
November	27.3°C23.2°C	23.2°C	252	27.6	11.712 h
December	27.6°C23.5°C	23.5°C	124	20.5	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

January in nearby cities

Distance from Arraiján

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