Climate averages 1991–2020
Rivera weather
by month.
See how the year changes. January has the highest average daily maximum; August has the lowest average monthly rainfall.
Long-term climate patterns, not a forecast for a particular trip.
Across the year Rivera averages a daytime high of 22.9°C and a nighttime low of 13.9°C, with about 1,487 mm of rain on roughly 111 days. January is the warmest month (average high 29.1°C) and July the coolest (16.5°C). October is the wettest month with 161 mm; August is the driest with 105 mm.
The annual picture
A year in Rivera
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
Rivera climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.1°C19.4°C | 19.4°C | 133 | 10.7 | 13.914 h |
| February | 28.1°C19.1°C | 19.1°C | 129 | 10.5 | 13.213 h |
| March | 26.6°C17.5°C | 17.5°C | 107 | 9.4 | 12.312 h |
| April | 23.2°C14.7°C | 14.7°C | 143 | 9.0 | 11.411 h |
| May | 19.3°C11.5°C | 11.5°C | 110 | 8.3 | 10.611 h |
| June | 17.1°C9.3°C | 9.3°C | 124 | 8.7 | 10.210 h |
| July | 16.5°C8.3°C | 8.3°C | 108 | 8.1 | 10.310 h |
| August | 18.8°C9.4°C | 9.4°C | 105 | 8.2 | 11.011 h |
| September | 20.0°C10.7°C | 10.7°C | 131 | 9.4 | 11.912 h |
| October | 22.6°C13.3°C | 13.3°C | 161 | 10.9 | 12.813 h |
| November | 25.4°C15.1°C | 15.1°C | 117 | 8.3 | 13.714 h |
| December | 28.2°C17.9°C | 17.9°C | 117 | 9.8 | 14.114 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
- Sant'Ana do LivramentoBrazil · 2 kmHigh 22.7°C · Low 13.5°C · 1,487 mm rain a year
- AlegreteBrazil · 127 kmHigh 24.3°C · Low 15.1°C · 1,695 mm rain a year
- BagéBrazil · 145 kmHigh 22.5°C · Low 13.5°C · 1,464 mm rain a year
- UruguaianaBrazil · 195 kmHigh 24.5°C · Low 15.7°C · 1,575 mm rain a year
- Santa MariaBrazil · 216 kmHigh 23.7°C · Low 14.2°C · 1,768 mm rain a year
- ConcordiaArgentina · 241 kmHigh 23.6°C · Low 14.6°C · 1,298 mm rain a year
- Cachoeira do SulBrazil · 272 kmHigh 23.9°C · Low 14.8°C · 1,603 mm rain a year
- PaysandúUruguay · 286 kmHigh 23.0°C · Low 13.5°C · 1,262 mm rain a year
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 limitsWhat 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 -30.90°, -55.60° (5 km from the city centre), adjusted up by 0.4°C for the difference between the city's elevation (194 m) and the cell's (261 m). Rain comes from the 0.25° cell at -31.00°, -55.50°. Sant'Ana do Livramento lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells. 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.