Asunción is warmest in January, averaging 35° by day and 23° at night. The wettest month is December with 189 mm, and the year brings about 1354 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 35° | 23° | 143 mm | 13.4 h | Mild |
| February | 35° | 23° | 90 mm | 12.9 h | Beach weather |
| March | 34° | 20° | 133 mm | 12.2 h | Mild |
| April | 29° | 18° | 159 mm | 11.4 h | Mild |
| May | 24° | 15° | 105 mm | 10.8 h | Sightseeing |
| June | 24° | 12° | 69 mm | 10.4 h | Sightseeing |
| July | 24° | 11° | 34 mm | 10.6 h | Sightseeing |
| August | 27° | 13° | 43 mm | 11.1 h | Beach weather |
| September | 30° | 15° | 60 mm | 11.9 h | Beach weather |
| October | 32° | 19° | 155 mm | 12.6 h | Mild |
| November | 33° | 20° | 174 mm | 13.3 h | Mild |
| December | 34° | 22° | 189 mm | 13.6 h | Rainy season |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: February, August and September — highs around 31°, nights no colder than 13°, and at most 90 mm of rain in a month.
Walking the city: May, June and July — highs of 24–24° and no more than 105 mm of rain a month.
Wet season: December — up to 189 mm in a single month.