September weather forecast
Ilulissat, Greenland

September witnesses a drop in both daylight and temperature, indicating the arrival of fall in Ilulissat. Although the city faces a substantial rise in rainfall, registering 35mm (1.38"), the mercury begins to dip to chillier levels. The fluctuating temperatures coupled with a drop in sunshine hours caution the impending return of colder months. With this shift, the flora in and around the city starts to adapt, showcasing Autumn's charm. September, with its altering climate, bridges the gap between Ilulissat's fleeting summer and its dominant winter.

Temperature

The shift from August to September in Ilulissat, Greenland, corresponds with a decrease in the average high-temperature, down to a cold 5°C (41°F) from a fresh 10°C (50°F). The low temperature average during September reflects a slight decrease to 0°C (32°F) from the day's peak.

Rainfall

September is the month with the most rainfall in Ilulissat. Rain falls for 9 days and accumulates 35mm (1.38") of precipitation.

Sea temperature

September is the month with the warmest seawater in Ilulissat, Greenland, with an average sea temperature of 3.4°C (38.1°F).
Note: Within the context of swimming, this scenario is life-threatening. Instant loss of control over breathing impairs cognitive functions. It is essential to use a specialized swimsuit to mitigate thermal loss.

Daylight

In Ilulissat, the average length of the day in September is 13h and 16min.
On the first day of the month, sunrise is at 06:47 and sunset at 22:00. On the last day of September, sunrise is at 08:37 and sunset at 19:50 -01.

Sunshine

In Ilulissat, Greenland, the average sunshine in September is 4h.

UV index

In September, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 1 translates into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.