Climate averages 1991–2020
Posadas weather
in May.
A warm, wet month: the 10th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Posadas: daytime highs average 22.1°C and nights cool to about 14.8°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 143 mm of rain on roughly 9 days, which makes May a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 47 min on an average May day.
The nearest other city in this atlas is Encarnación (9 km away). In May its highs average 22.2°C, about as warm as Posadas, with 154 mm of rain.
Among the 67 cities listed in Argentina, Posadas ranks joint 4th of 67 for the warmest May highs and 67th of 67 for the driest May (rainfall, lowest first). The mean May high of those 67 cities is 18.0°C; Posadas is 4.1°C warmer than that mean.
From May to June, average highs fall by 1.7°C to 20.4°C, and monthly rainfall falls from 143 mm to 121 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
Posadas climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.0°C22.7°C | 22.7°C | 133 | 12.6 | 13.714 h |
| February | 30.1°C22.2°C | 22.2°C | 130 | 11.9 | 13.013 h |
| March | 29.0°C20.9°C | 20.9°C | 121 | 10.5 | 12.312 h |
| April | 26.1°C18.1°C | 18.1°C | 159 | 9.9 | 11.511 h |
| May, selected | 22.1°C14.8°C | 14.8°C | 143 | 9.1 | 10.811 h |
| June | 20.4°C13.3°C | 13.3°C | 121 | 8.9 | 10.410 h |
| July | 19.9°C12.0°C | 12.0°C | 117 | 9.1 | 10.611 h |
| August | 22.5°C13.4°C | 13.4°C | 90 | 7.9 | 11.111 h |
| September | 24.3°C15.0°C | 15.0°C | 147 | 9.8 | 11.912 h |
| October | 26.6°C17.8°C | 17.8°C | 216 | 12.4 | 12.713 h |
| November | 28.2°C19.1°C | 19.1°C | 156 | 10.4 | 13.413 h |
| December | 30.3°C21.5°C | 21.5°C | 163 | 11.7 | 13.814 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
- Encarnación in MayParaguay · 9 kmHigh 22.2°C · Low 14.7°C · 154 mm rain
- Ituzaingó in MayArgentina · 78 kmHigh 22.1°C · Low 15.3°C · 134 mm rain
- Santa Rosa, Brazil in MayBrazil · 152 kmHigh 21.5°C · Low 13.4°C · 152 mm rain
- Santo Ângelo in MayBrazil · 192 kmHigh 21.2°C · Low 12.7°C · 151 mm rain
- Ijuí in MayBrazil · 226 kmHigh 21.1°C · Low 12.5°C · 143 mm rain
- Foz do Iguaçu in MayBrazil · 244 kmHigh 23.2°C · Low 15.8°C · 162 mm rain
- Ciudad del Este in MayParaguay · 245 kmHigh 23.1°C · Low 15.8°C · 161 mm rain
- Formosa, Argentina in MayArgentina · 260 kmHigh 23.0°C · Low 15.6°C · 128 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 Posadas) is explained once on the Posadas year overview and on the Sources, method and limits page.