Climate averages 1991–2020
Santa Maria weather
in September.
A mild, wet month: the 8th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Santa Maria: daytime highs average 21.2°C and nights cool to about 11.4°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 157 mm of rain on roughly 11 days, which makes September a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 53 min on an average September day.
The nearest other city in this atlas is Cachoeira do Sul (96 km away). In September its highs average 21.3°C, about as warm as Santa Maria, with 153 mm of rain.
Among the 448 cities listed in Brazil, Santa Maria ranks joint 421st of 448 for the warmest September highs and joint 425th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Santa Maria is 6.3°C cooler than that mean.
From September to October, average highs rise by 2.3°C to 23.6°C, and monthly rainfall rises from 157 mm to 208 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
Santa Maria climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.1°C19.5°C | 19.5°C | 159 | 13.8 | 13.814 h |
| February | 28.4°C19.4°C | 19.4°C | 146 | 12.6 | 13.113 h |
| March | 27.1°C17.9°C | 17.9°C | 124 | 11.2 | 12.312 h |
| April | 24.1°C14.9°C | 14.9°C | 144 | 10.1 | 11.411 h |
| May | 20.3°C11.6°C | 11.6°C | 127 | 9.5 | 10.711 h |
| June | 18.4°C9.7°C | 9.7°C | 137 | 10.1 | 10.310 h |
| July | 17.8°C8.5°C | 8.5°C | 149 | 10.2 | 10.410 h |
| August | 20.2°C9.8°C | 9.8°C | 122 | 9.8 | 11.111 h |
| September, selected | 21.2°C11.4°C | 11.4°C | 157 | 10.6 | 11.912 h |
| October | 23.6°C13.9°C | 13.9°C | 208 | 12.6 | 12.813 h |
| November | 26.0°C15.5°C | 15.5°C | 136 | 10.2 | 13.614 h |
| December | 28.6°C18.2°C | 18.2°C | 158 | 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
September in nearby cities
- Cachoeira do Sul in SeptemberBrazil · 96 kmHigh 21.3°C · Low 12.0°C · 153 mm rain
- Santa Cruz do Sul in SeptemberBrazil · 133 kmHigh 21.5°C · Low 11.9°C · 161 mm rain
- Ijuí in SeptemberBrazil · 145 kmHigh 22.5°C · Low 12.8°C · 157 mm rain
- Santo Ângelo in SeptemberBrazil · 160 kmHigh 22.8°C · Low 12.9°C · 159 mm rain
- Lajeado in SeptemberBrazil · 180 kmHigh 21.8°C · Low 12.0°C · 161 mm rain
- Bagé in SeptemberBrazil · 185 kmHigh 19.6°C · Low 10.4°C · 139 mm rain
- Alegrete in SeptemberBrazil · 192 kmHigh 21.7°C · Low 12.1°C · 155 mm rain
- Passo Fundo in SeptemberBrazil · 209 kmHigh 20.6°C · Low 11.1°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 Santa Maria) is explained once on the Santa Maria year overview and on the Sources, method and limits page.