Climate averages 1991–2020
Castro weather
in May.
A mild, moderately wet month: the 10th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Castro: daytime highs average 19.8°C and nights cool to about 11.9°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 89 mm of rain on roughly 9 days, which makes May a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 56 min on an average May day.
The nearest other city in this atlas is Ponta Grossa (37 km away). In May its highs average 19.6°C, about as warm as Castro, with 90 mm of rain.
Among the 448 cities listed in Brazil, Castro ranks joint 424th of 448 for the warmest May highs and joint 275th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Castro is 5.5°C cooler than that mean.
From May to June, average highs fall by 0.9°C to 18.9°C, and monthly rainfall rises from 89 mm to 93 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Ponta Grossa in MayBrazil · 37 kmHigh 19.6°C · Low 11.2°C · 90 mm rain
- Telêmaco Borba in MayBrazil · 80 kmHigh 21.5°C · Low 12.7°C · 94 mm rain
- Campo Largo in MayBrazil · 89 kmHigh 18.9°C · Low 11.5°C · 89 mm rain
- Almirante Tamandaré in MayBrazil · 92 kmHigh 19.3°C · Low 12.1°C · 86 mm rain
- Colombo, Brazil in MayBrazil · 97 kmHigh 18.7°C · Low 11.7°C · 86 mm rain
- Curitiba in MayBrazil · 103 kmHigh 19.2°C · Low 12.1°C · 92 mm rain
- Araucária in MayBrazil · 108 kmHigh 19.3°C · Low 12.0°C · 89 mm rain
- Pinhais in MayBrazil · 110 kmHigh 19.3°C · Low 12.3°C · 92 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.