Climate averages 1991–2020
Guaíba weather
in January.
A hot, wet month: the warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Guaíba: daytime highs average 29.2°C and nights cool to about 20.8°C. By daytime temperature it is the warmest month of the year.
Expect about 137 mm of rain on roughly 14 days, which makes January a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 51 min on an average January day.
The nearest other city in this atlas is Porto Alegre (13 km away). In January its highs average 29.2°C, about as warm as Guaíba, with 137 mm of rain.
Among the 448 cities listed in Brazil, Guaíba ranks joint 151st of 448 for the warmest January highs and joint 102nd of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Guaíba is 0.7°C warmer than that mean.
From January to February, average highs fall by 0.3°C to 28.8°C, and monthly rainfall falls from 137 mm to 128 mm.
The annual picture
January 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
Guaíba climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 29.2°C20.8°C | 20.8°C | 137 | 14.0 | 13.814 h |
| February | 28.8°C20.9°C | 20.9°C | 128 | 13.5 | 13.213 h |
| March | 27.6°C19.6°C | 19.6°C | 111 | 11.9 | 12.312 h |
| April | 24.9°C16.7°C | 16.7°C | 106 | 9.2 | 11.411 h |
| May | 21.1°C13.3°C | 13.3°C | 107 | 9.2 | 10.611 h |
| June | 18.9°C10.9°C | 10.9°C | 113 | 9.2 | 10.210 h |
| July | 18.3°C9.9°C | 9.9°C | 140 | 10.0 | 10.410 h |
| August | 20.4°C11.0°C | 11.0°C | 120 | 10.2 | 11.011 h |
| September | 21.4°C12.8°C | 12.8°C | 146 | 11.1 | 11.912 h |
| October | 23.7°C15.2°C | 15.2°C | 170 | 12.4 | 12.813 h |
| November | 25.9°C16.9°C | 16.9°C | 122 | 10.9 | 13.614 h |
| December | 28.4°C19.3°C | 19.3°C | 124 | 11.8 | 14.014 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
January in nearby cities
- Porto Alegre in JanuaryBrazil · 13 kmHigh 29.2°C · Low 20.6°C · 137 mm rain
- Canoas in JanuaryBrazil · 26 kmHigh 29.1°C · Low 20.5°C · 137 mm rain
- Alvorada in JanuaryBrazil · 27 kmHigh 28.9°C · Low 20.7°C · 140 mm rain
- Viamão in JanuaryBrazil · 29 kmHigh 28.3°C · Low 20.6°C · 140 mm rain
- Gravataí in JanuaryBrazil · 37 kmHigh 28.9°C · Low 20.3°C · 140 mm rain
- São Leopoldo in JanuaryBrazil · 43 kmHigh 28.9°C · Low 20.1°C · 166 mm rain
- Novo Hamburgo in JanuaryBrazil · 52 kmHigh 28.6°C · Low 19.4°C · 166 mm rain
- Sapiranga in JanuaryBrazil · 61 kmHigh 28.9°C · Low 19.9°C · 165 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 Guaíba) is explained once on the Guaíba year overview and on the Sources, method and limits page.
Porto Alegre and Canoas lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.