Climate averages 1991–2020

Rio Largo weather
by month.

See how the year changes. March (tied with 3 other months) has the highest average daily maximum; December has the lowest average monthly rainfall.

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

Warmest month 29.7°C March, average high
Coolest month 20.6°C August, average low
Wettest month 171 mm June, monthly total
Driest month 30 mm December, monthly total
The year at a glance · average highYear overview

Across the year Rio Largo averages a daytime high of 28.0°C and a nighttime low of 22.3°C, with about 1,051 mm of rain on roughly 226 days. March (tied with 3 other months) is the warmest month (average high 29.7°C) and July the coolest (25.5°C). June is the wettest month with 171 mm; December is the driest with 30 mm.

The annual picture

A year in Rio Largo

30-year average
Average highAverage low°C
Average daily high and low temperatures by month The same values are available in the monthly table below. Lines show mean daily maxima and minima, not a forecast interval. 1520253035 JanFebMarAprMayJunJulAugSepOctNovDec

Monthly rainfall

Average total · mm
Average monthly rainfall totalsEach bar is a mean monthly total over 1991–2020. Full numbers are in the table. JanFebMarAprMayJunJulAugSepOctNovDec 2000

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

Every month, side by side

Rio Largo climate table

1991–2020
Monthly climate averages for Rio Largo, 1991–2020
MonthAverage highHigh / lowAverage lowRainfall mm/monthRain days ≥1 mm/dayDaylight hours/dayDay­light h/day
January 29.7°C23.3°C23.3°C5515.312.613 h
February 29.7°C23.5°C23.5°C5715.912.412 h
March 29.7°C23.5°C23.5°C7118.212.212 h
April 28.9°C23.2°C23.2°C10920.711.912 h
May 27.6°C22.5°C22.5°C14924.011.712 h
June 26.3°C21.6°C21.6°C17125.211.612 h
July 25.5°C20.9°C20.9°C16025.811.612 h
August 25.7°C20.6°C20.6°C10023.411.812 h
September 26.5°C21.1°C21.1°C6518.812.012 h
October 27.9°C22.0°C22.0°C4915.712.312 h
November 29.1°C22.6°C22.6°C3311.812.513 h
December 29.7°C23.2°C23.2°C3011.512.713 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

Nearby cities

Distance from Rio Largo

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
What do the high and low temperatures mean?

We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.

How is a rain day counted?

A local calendar day (standard time, UTC-3, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.

Where do the numbers come from?

ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at -9.50°, -35.90° (6 km from the city centre). Rain comes from the 0.25° cell at -9.50°, -35.75°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.

Does this page show sunshine, humidity or sea temperature?

No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.