Climate averages 1991–2020

Itaboraí weather
in March.

A hot, very wet month: the 4th warmest and the 10th driest of the year.

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

Average high 28.6°C Daytime mean, March

Average low 21.8°C Night-time mean, March

Rainfall 220 mm 22 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

March is a hot month in Itaboraí: daytime highs average 28.6°C and nights cool to about 21.8°C. By daytime temperature it is the 4th warmest of the 12 months.

Expect about 220 mm of rain on roughly 22 days, which makes March a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 14 min on an average March day.

The nearest other city in this atlas is Maricá (20 km away). In March its highs average 29.0°C, about as warm as Itaboraí, with 123 mm of rain.

Among the 448 cities listed in Brazil, Itaboraí ranks joint 170th of 448 for the warmest March highs and joint 375th of 448 for the driest March (rainfall, lowest first). The mean March high of those 448 cities is 27.9°C; Itaboraí is 0.7°C warmer than that mean.

From March to April, average highs fall by 1.6°C to 27.0°C, and monthly rainfall falls from 220 mm to 108 mm.

The annual picture

March 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

Itaboraí climate table

1991–2020

Monthly climate averages for Itaboraí, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	29.7°C22.5°C	22.5°C	259	21.3	13.413 h
February	30.1°C22.5°C	22.5°C	203	18.2	12.913 h
March, selected	28.6°C21.8°C	21.8°C	220	21.7	12.212 h
April	27.0°C20.1°C	20.1°C	108	14.2	11.612 h
May	24.8°C17.5°C	17.5°C	77	10.9	11.011 h
June	24.4°C16.1°C	16.1°C	44	6.9	10.811 h
July	24.1°C15.4°C	15.4°C	44	7.3	10.911 h
August	24.9°C15.8°C	15.8°C	43	7.4	11.311 h
September	25.9°C17.4°C	17.4°C	82	11.1	11.912 h
October	27.0°C19.1°C	19.1°C	112	13.4	12.613 h
November	27.0°C20.1°C	20.1°C	210	18.7	13.213 h
December	28.7°C21.6°C	21.6°C	255	21.6	13.513 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

March in nearby cities

Distance from Itaboraí

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