Ilulissat in September
In September, Ilulissat averages 4°C (40°F) during the day and -1°C (30°F) at night, with frequent rain — about 14 days of the month see precipitation (39 mm total).
Off-peakConditions are cold — pack winter layers. Plan for unsettled weather and bring rain gear.
September is one of the wetter and less comfortable months in Ilulissat. If your dates are flexible, consider a different time of year.
How September compares to the rest of the year in Ilulissat
September is in the middle of the year for warmth in Ilulissat (4th of 12) and one of the wettest months (1st of 12). Daytime temperature runs 6°C above the annual average (-2°C). September runs 6°C cooler than August (11°C) and cools 6°C in October (-2°C).
September sunrise & sunset in Ilulissat
Times shown for Ilulissat local time (America/Nuuk), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Ilulissat — September
Golden-hour and blue-hour windows for the 15th of September, in Ilulissat's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Ilulissat 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 (Off-peak) and Ilulissat's popularity.
Crowds & pricing — September in Ilulissat
This is off-peak for Ilulissat — the lowest prices of the year and the fewest crowds, but with real trade-offs: some restaurants, hotels, and beach businesses may close for the season; weather conditions can make outdoor activities unpredictable; and a handful of seasonal sights run reduced hours or close entirely. Great if you prefer a quiet local rhythm and don't mind the climate giving you reasons to choose indoor activities.
Why this tier: challenging tourism weather
Sun & mosquito risk — September in Ilulissat
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.
🥶 Bitter cold — Ilulissat in September
Gear: Snow rare but air is freezing. Insulated coat, hat, and gloves still required — wind chill is the real enemy.
Ilulissat in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | -13°C / 9°F | -19°C / -2°F | 18 mm | 13 | — |
| February | -14°C / 6°F | -21°C / -6°F | 11 mm | 10 | — |
| March | -11°C / 12°F | -18°C / 0°F | 14 mm | 11 | — |
| April | -3°C / 26°F | -10°C / 14°F | 25 mm | 11 | — |
| May | 3°C / 38°F | -3°C / 27°F | 27 mm | 10 | — |
| June | 10°C / 49°F | 3°C / 38°F | 24 mm | 10 | — |
| July | 13°C / 56°F | 6°C / 43°F | 44 mm | 10 | — |
| August | 11°C / 51°F | 4°C / 40°F | 58 mm | 13 | — |
| September | 4°C / 40°F | -1°C / 30°F | 39 mm | 14 | — |
| October | -2°C / 28°F | -8°C / 18°F | 41 mm | 13 | — |
| November | -7°C / 19°F | -13°C / 8°F | 26 mm | 12 | — |
| December | -9°C / 15°F | -15°C / 4°F | 26 mm | 12 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Ilulissat in September →
Frequently asked questions
How hot is Ilulissat in September?
In September, Ilulissat averages a high of 4°C (40°F) and a low of -1°C (30°F) — generally cold.
Does it rain a lot in Ilulissat in September?
September can be fairly wet in Ilulissat, with about 14 rainy days on average.
Is September a good time to visit Ilulissat?
September is cold but on the rainy side. It suits travelers who are comfortable with cold weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Ilulissat in September?
Pack heavy winter layers, a coat, hat and gloves, plus a compact umbrella or rain jacket. See the full September packing list for Ilulissat for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.