Climate averages 1991–2020
Três Rios weather
in May.
A warm, fairly dry month: the 10th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Três Rios: daytime highs average 25.1°C and nights cool to about 16.7°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 35 mm of rain on roughly 6 days, which makes May a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 04 min on an average May day.
The nearest other city in this atlas is Teresópolis (41 km away). In May its highs average 21.3°C, 3.8°C cooler than Três Rios, with 80 mm of rain.
Among the 448 cities listed in Brazil, Três Rios ranks joint 228th of 448 for the warmest May highs and joint 80th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Três Rios is 0.2°C cooler than that mean.
From May to June, average highs fall by 0.6°C to 24.5°C, and monthly rainfall falls from 35 mm to 17 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Três Rios climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.6°C21.5°C | 21.5°C | 232 | 19.3 | 13.313 h |
| February | 30.2°C21.5°C | 21.5°C | 156 | 15.0 | 12.813 h |
| March | 28.9°C21.0°C | 21.0°C | 148 | 17.6 | 12.212 h |
| April | 27.4°C19.5°C | 19.5°C | 57 | 9.6 | 11.612 h |
| May, selected | 25.1°C16.7°C | 16.7°C | 35 | 6.3 | 11.111 h |
| June | 24.5°C15.4°C | 15.4°C | 17 | 3.4 | 10.811 h |
| July | 24.3°C14.9°C | 14.9°C | 18 | 3.7 | 10.911 h |
| August | 25.5°C15.3°C | 15.3°C | 21 | 4.3 | 11.411 h |
| September | 26.8°C17.0°C | 17.0°C | 59 | 8.6 | 12.012 h |
| October | 27.8°C18.8°C | 18.8°C | 107 | 13.5 | 12.613 h |
| November | 27.5°C19.7°C | 19.7°C | 198 | 18.8 | 13.213 h |
| December | 28.9°C20.9°C | 20.9°C | 235 | 21.3 | 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
May in nearby cities
- Teresópolis in MayBrazil · 41 kmHigh 21.3°C · Low 14.2°C · 80 mm rain
- Juiz de Fora in MayBrazil · 42 kmHigh 22.9°C · Low 14.5°C · 55 mm rain
- Petrópolis in MayBrazil · 43 kmHigh 22.0°C · Low 14.8°C · 70 mm rain
- Valença (Rio de Janeiro), Brazil in MayBrazil · 53 kmHigh 23.5°C · Low 15.1°C · 54 mm rain
- Magé in MayBrazil · 62 kmHigh 25.1°C · Low 17.7°C · 75 mm rain
- Nova Friburgo in MayBrazil · 72 kmHigh 22.3°C · Low 14.9°C · 80 mm rain
- Japeri in MayBrazil · 74 kmHigh 26.3°C · Low 18.1°C · 67 mm rain
- Barra do Piraí in MayBrazil · 75 kmHigh 24.5°C · Low 16.3°C · 53 mm rain
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 limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Três Rios) is explained once on the Três Rios year overview and on the Sources, method and limits page.