Asunción in September
In September, Asunción averages 28°C (82°F) during the day and 18°C (64°F) at night, with around 12 days of rain (81 mm total).
ShoulderConditions are warm and beach-friendly. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Asunción, with some rain to plan around.
How September compares to the rest of the year in Asunción
September is in the middle of the year for warmth in Asunción (7th of 12) and one of the driest months (10th of 12). Daytime temperature matches the city's annual average. September runs 2°C warmer than August (25°C) and warms a further 1°C into October (29°C).
September sunrise & sunset in Asunción
Times shown for Asunción local time (America/Asuncion), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Asunción — September
Golden-hour and blue-hour windows for the 15th of September, in Asunción's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Asunción in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Asunción's popularity.
Crowds & pricing — September in Asunción
Asunción is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — September in Asunción
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Asunción in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 33°C / 91°F | 24°C / 76°F | 151 mm | 21 | — |
| February | 32°C / 89°F | 23°C / 74°F | 101 mm | 17 | — |
| March | 30°C / 86°F | 22°C / 71°F | 130 mm | 17 | — |
| April | 28°C / 82°F | 19°C / 67°F | 160 mm | 13 | — |
| May | 23°C / 74°F | 16°C / 61°F | 138 mm | 15 | — |
| June | 22°C / 72°F | 14°C / 58°F | 82 mm | 12 | — |
| July | 23°C / 73°F | 14°C / 58°F | 72 mm | 9 | — |
| August | 25°C / 78°F | 16°C / 60°F | 68 mm | 9 | — |
| September | 28°C / 82°F | 18°C / 64°F | 81 mm | 12 | — |
| October | 29°C / 84°F | 20°C / 68°F | 202 mm | 16 | — |
| November | 30°C / 86°F | 21°C / 69°F | 202 mm | 16 | — |
| December | 32°C / 89°F | 23°C / 73°F | 170 mm | 17 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Asunción in September →
Frequently asked questions
How hot is Asunción in September?
In September, Asunción averages a high of 28°C (82°F) and a low of 18°C (64°F) — generally warm.
Does it rain a lot in Asunción in September?
September can be fairly wet in Asunción, with about 12 rainy days on average.
Is September a good time to visit Asunción?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Asunción in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Asunción for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.