Norrtälje Weather in September

In Norrtälje, September brings moderate daytime temperatures around 17°C (63°F), with nights cooling to 9°C (48°F). Some rainfall is to be expected.

Rainfall in Norrtälje in September

Analyzing past climate data, one can expect approximately 14 days of rain, averaging 56 mm (2.2 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Norrtälje in September

Temperatures in Norrtälje in September top out at 17°C (63°F) and drop to 9°C (48°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 9°C (48°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Norrtälje in September

The area enjoys a balanced 171 hours of sunlight, ensuring it's neither too overcast nor too sunny.

Should you favor a climate that's both dry and comfortably warm, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.