Monthly climate averages for Unión, Paraguay. Based on 10-year ERA5 reanalysis data.
Am Tropical Monsoon
Climate OverviewUnión, Paraguay in May has warm conditions, with highs averaging 24.6°C (76°F). Rain falls on about 10 days this month.
This month falls at the end of Autumn.
Daily highs in May gradually drop from around 28°C (82°F) at the start to 22°C (72°F) by month's end.
May sees fairly even rainfall, totalling about 119 mm across the month.
Expect around 7.8h of sunshine at the start of May, decreasing to 6.2h by the end.
The warmest days tend to fall around the 1th, averaging 27.8°C (82°F).
Compared to April, this month is about 4°C cooler with 1 more rainy days.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 25°C (76°F) are ideal for full-day outdoor exploration.
Rain usually comes in shorter passing showers rather than all-day rain.
1 of the last 5 yearly records were warmer than this month's long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 33°C / 24°C | 38°C / 27°C | 12days (131 mm) Wet | 11.2h Excellent | 68% Muggy | 9.2 Very High | Poor | View Details |
| February | 33°C / 24°C | 37°C / 27°C | 11days (100 mm) Wet | 10.9h Excellent | 69% Muggy | 8.3 Very High | Poor | View Details |
| March | 31°C / 23°C | 36°C / 25°C | 11days (125 mm) Wet | 10h Excellent | 70% Muggy | 7.7 Very High | Fair | View Details |
| April | 29°C / 20°C | 31°C / 22°C | 9days (131 mm) Wet | 8.9h Good | 73% Muggy | 5.8 High | Good | View Details |
| May best | 25°C / 17°C | 26°C / 17°C | 10days (119 mm) Wet | 7.5h Good | 76% Humid | 4.7 Moderate | Excellent | View Details |
| June best | 23°C / 15°C | 24°C / 15°C | 7days (70 mm) Good | 7.5h Good | 75% Muggy | 4.1 Moderate | Excellent | View Details |
| July best | 24°C / 15°C | 24°C / 13°C | 5days (38 mm) Good | 8.4h Good | 68% Muggy | 4.6 Moderate | Excellent | View Details |
| August best | 26°C / 16°C | 26°C / 15°C | 7days (87 mm) Good | 8.9h Good | 63% Muggy | 5.5 High | Excellent | View Details |
| September best | 30°C / 19°C | 31°C / 18°C | 7days (85 mm) Good | 9.4h Good | 63% Muggy | 6.9 High | Excellent | View Details |
| October | 30°C / 21°C | 33°C / 21°C | 12days (186 mm) Wet | 9.5h Good | 68% Muggy | 7.6 Very High | Wet | View Details |
| November | 31°C / 21°C | 35°C / 23°C | 10days (146 mm) Wet | 10.9h Excellent | 66% Muggy | 8.3 Very High | Fair | View Details |
| December | 32°C / 23°C | 37°C / 25°C | 11days (143 mm) Wet | 11.2h Excellent | 68% Muggy | 8.5 Very High | Fair | View Details |
Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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