Climate averages 1991–2020
Viana, Brazil weather
in September.
A warm, moderately wet month: the 8th warmest and the joint 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Viana, Brazil: daytime highs average 26.2°C and nights cool to about 19.2°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 63 mm of rain on roughly 10 days, which makes September a moderately wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 58 min on an average September day.
The nearest other city in this atlas is Cariacica (16 km away). In September its highs average 25.3°C, 0.8°C cooler than Viana, Brazil, with 66 mm of rain.
Among the 448 cities listed in Brazil, Viana, Brazil ranks joint 280th of 448 for the warmest September highs and joint 221st of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Viana, Brazil is 1.4°C cooler than that mean.
From September to October, average highs rise by 1.0°C to 27.2°C, and monthly rainfall rises from 63 mm to 113 mm.
The annual picture
September 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
Viana, Brazil climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.7°C23.2°C | 23.2°C | 138 | 12.1 | 13.213 h |
| February | 30.1°C23.3°C | 23.3°C | 95 | 10.1 | 12.813 h |
| March | 29.3°C23.0°C | 23.0°C | 159 | 14.3 | 12.212 h |
| April | 27.7°C21.7°C | 21.7°C | 104 | 14.4 | 11.612 h |
| May | 25.9°C19.6°C | 19.6°C | 63 | 10.5 | 11.211 h |
| June | 25.2°C18.4°C | 18.4°C | 38 | 7.5 | 10.911 h |
| July | 24.6°C17.8°C | 17.8°C | 42 | 8.2 | 11.011 h |
| August | 25.0°C18.0°C | 18.0°C | 43 | 7.9 | 11.411 h |
| September, selected | 26.2°C19.2°C | 19.2°C | 63 | 9.7 | 12.012 h |
| October | 27.2°C20.5°C | 20.5°C | 113 | 11.8 | 12.513 h |
| November | 27.3°C21.5°C | 21.5°C | 208 | 15.9 | 13.113 h |
| December | 28.8°C22.6°C | 22.6°C | 206 | 16.3 | 13.313 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
September in nearby cities
- Cariacica in SeptemberBrazil · 16 kmHigh 25.3°C · Low 19.0°C · 66 mm rain
- Vila Velha in SeptemberBrazil · 22 kmHigh 25.3°C · Low 19.8°C · 50 mm rain
- Guarapari in SeptemberBrazil · 31 kmHigh 25.8°C · Low 20.1°C · 57 mm rain
- Serra in SeptemberBrazil · 35 kmHigh 25.5°C · Low 19.3°C · 50 mm rain
- Aracruz in SeptemberBrazil · 68 kmHigh 26.7°C · Low 18.9°C · 40 mm rain
- Cachoeiro de Itapemirim in SeptemberBrazil · 82 kmHigh 27.2°C · Low 17.8°C · 76 mm rain
- Colatina in SeptemberBrazil · 96 kmHigh 28.2°C · Low 19.2°C · 21 mm rain
- Linhares in SeptemberBrazil · 120 kmHigh 27.2°C · Low 19.3°C · 45 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 Viana) is explained once on the Viana, Brazil year overview and on the Sources, method and limits page.