Climate averages 1991–2020
Rio Grande weather
in October.
A mild, wet month: the 7th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Rio Grande: daytime highs average 18.9°C and nights cool to about 16.1°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 129 mm of rain on roughly 10 days, which makes October a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 51 min on an average October day.
The nearest other city in this atlas is Pelotas (37 km away). In October its highs average 20.6°C, 1.7°C warmer than Rio Grande, with 140 mm of rain.
Among the 448 cities listed in Brazil, Rio Grande ranks 448th of 448 for the warmest October highs and joint 312th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Rio Grande is 9.3°C cooler than that mean.
From October to November, average highs rise by 2.1°C to 21.0°C, and monthly rainfall falls from 129 mm to 87 mm.
The annual picture
October 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
Rio Grande climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.6°C21.9°C | 21.9°C | 87 | 8.6 | 14.014 h |
| February | 24.9°C22.3°C | 22.3°C | 85 | 9.8 | 13.213 h |
| March | 24.0°C21.4°C | 21.4°C | 92 | 9.9 | 12.312 h |
| April | 21.7°C18.8°C | 18.8°C | 112 | 10.1 | 11.311 h |
| May | 18.6°C15.8°C | 15.8°C | 104 | 9.8 | 10.511 h |
| June | 16.1°C13.0°C | 13.0°C | 110 | 9.7 | 10.110 h |
| July | 15.0°C11.7°C | 11.7°C | 112 | 10.1 | 10.310 h |
| August | 15.8°C12.5°C | 12.5°C | 108 | 9.6 | 11.011 h |
| September | 16.7°C13.7°C | 13.7°C | 125 | 10.2 | 11.912 h |
| October, selected | 18.9°C16.1°C | 16.1°C | 129 | 10.1 | 12.913 h |
| November | 21.0°C18.0°C | 18.0°C | 87 | 7.7 | 13.714 h |
| December | 23.2°C20.2°C | 20.2°C | 86 | 8.0 | 14.214 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
October in nearby cities
- Pelotas in OctoberBrazil · 37 kmHigh 20.6°C · Low 15.0°C · 140 mm rain
- Bagé in OctoberBrazil · 206 kmHigh 22.1°C · Low 12.9°C · 151 mm rain
- Guaíba in OctoberBrazil · 226 kmHigh 23.7°C · Low 15.2°C · 170 mm rain
- Cachoeira do Sul in OctoberBrazil · 235 kmHigh 23.7°C · Low 14.5°C · 190 mm rain
- Porto Alegre in OctoberBrazil · 238 kmHigh 23.8°C · Low 15.2°C · 170 mm rain
- Viamão in OctoberBrazil · 240 kmHigh 23.0°C · Low 15.3°C · 170 mm rain
- Alvorada in OctoberBrazil · 246 kmHigh 23.7°C · Low 15.3°C · 170 mm rain
- Canoas in OctoberBrazil · 251 kmHigh 23.9°C · Low 15.2°C · 170 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 Rio Grande) is explained once on the Rio Grande year overview and on the Sources, method and limits page.