Vallentuna Weather in September

With daytime temperatures of 17°C (63°F) and nighttime lows of 9°C (48°F), September in Vallentuna brings moderate temperatures during the day. Some rainfall is to be expected during the month.

Rainfall in Vallentuna in September

Rain is expected on roughly 15 days, totalling around 57 mm (2.2 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Vallentuna in September

In September, Vallentuna sees moderate temperatures, with highs of 17°C (63°F). Nights drop to around 9°C (48°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights fall to 9°C (48°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Vallentuna in September

The area experiences a moderate amount of sunshine, with approximately 171 hours of sunlight expected. This means a decent mix of sun and overcast.

Wind Speed in Vallentuna in September

Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in September

The water is 15°C (59°F) this month — cool enough to feel refreshing on a warm day, but cold enough that most people won't stay in for long without a wetsuit.

Should you favor a climate that's both dry and comfortably warm, June, 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.

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• January
• February
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• May
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• October
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For a detailed overview over the year and the best time to visit Sweden, check out our Vallentuna's climate page.

Vallentuna Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 17°C (63°F)  

Water Temperature 15°C (59°F) *  

Chance of Rain 49%  

Precipitation 57 mm (2.2 in)  

Rainy days 15 days  

Humidity 78% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 171 hours *  

Percentage Sunshine *  

* Data from: Stockholm, Sweden (21 KM, 13 Miles).

What to Wear in Vallentuna in September

For Vallentuna in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. With water temperatures around 15°C (59°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Vallentuna in September

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

Swimming

6/10

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 Vallentuna's climate page.

More climate data for Vallentuna

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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