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.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Sweden, check out our Norrtälje's climate page.

Norrtälje Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 17°C (63°F)  

Chance of Rain 48%  

Precipitation 56 mm (2.2 in)  

Rainy days 14 days  

Humidity 78% *  

Sunshine 171 hours *  

Percentage Sunshine *  

* Data from: Stockholm, Sweden (62 KM, 38 Miles).

What to Wear in Norrtälje in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Norrtälje in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

6/10

Walking

6/10

Barbeque

6/10

Camping

4/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Sweden, check out our Norrtälje's climate page.

More climate data for Norrtälje

Temperature Rainfall Sunshine Humidity

See the full Norrtälje climate overview or explore weather in Sweden.