Climate averages 1991–2020
Castro weather
in September.
A warm, wet month: the 8th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Castro: daytime highs average 22.1°C and nights cool to about 12.5°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 127 mm of rain on roughly 10 days, which makes September a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 56 min on an average September day.
The nearest other city in this atlas is Ponta Grossa (37 km away). In September its highs average 21.9°C, about as warm as Castro, with 131 mm of rain.
Among the 448 cities listed in Brazil, Castro ranks joint 396th of 448 for the warmest September highs and 375th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Castro is 5.4°C cooler than that mean.
From September to October, average highs rise by 1.3°C to 23.4°C, and monthly rainfall rises from 127 mm to 138 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
Castro climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.3°C17.8°C | 17.8°C | 235 | 23.7 | 13.513 h |
| February | 25.2°C17.8°C | 17.8°C | 180 | 21.1 | 12.913 h |
| March | 24.4°C16.9°C | 16.9°C | 133 | 18.0 | 12.212 h |
| April | 23.0°C14.9°C | 14.9°C | 69 | 9.6 | 11.512 h |
| May | 19.8°C11.9°C | 11.9°C | 89 | 8.9 | 10.911 h |
| June | 18.9°C10.8°C | 10.8°C | 93 | 8.1 | 10.611 h |
| July | 18.8°C10.1°C | 10.1°C | 79 | 7.0 | 10.811 h |
| August | 20.7°C10.8°C | 10.8°C | 72 | 7.2 | 11.311 h |
| September, selected | 22.1°C12.5°C | 12.5°C | 127 | 10.4 | 11.912 h |
| October | 23.4°C14.4°C | 14.4°C | 138 | 15.1 | 12.713 h |
| November | 23.9°C15.2°C | 15.2°C | 133 | 16.0 | 13.313 h |
| December | 25.1°C16.9°C | 16.9°C | 172 | 20.2 | 13.614 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
- Ponta Grossa in SeptemberBrazil · 37 kmHigh 21.9°C · Low 12.0°C · 131 mm rain
- Telêmaco Borba in SeptemberBrazil · 80 kmHigh 24.4°C · Low 14.0°C · 124 mm rain
- Campo Largo in SeptemberBrazil · 89 kmHigh 20.7°C · Low 11.8°C · 131 mm rain
- Almirante Tamandaré in SeptemberBrazil · 92 kmHigh 21.0°C · Low 12.4°C · 124 mm rain
- Colombo, Brazil in SeptemberBrazil · 97 kmHigh 20.2°C · Low 11.8°C · 124 mm rain
- Curitiba in SeptemberBrazil · 103 kmHigh 20.8°C · Low 12.2°C · 134 mm rain
- Araucária in SeptemberBrazil · 108 kmHigh 20.8°C · Low 12.2°C · 131 mm rain
- Pinhais in SeptemberBrazil · 110 kmHigh 20.6°C · Low 12.3°C · 134 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 Castro) is explained once on the Castro year overview and on the Sources, method and limits page.