Norrköping, Sweden — Weather in September 2026

Climate Overview

Norrköping, Sweden in September has mild conditions, with highs averaging 17.1°C (63°F) and noticeably cooler mornings. Sea temperature stays cool at 18.2°C (65°F).

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 19°C (66°F) at the start to 15°C (59°F) by month's end.

September sees fairly even rainfall, totalling about 49 mm across the month.

Expect around 9.3h of sunshine at the start of September, decreasing to 6.9h by the end.

The warmest days tend to fall around the 6th, averaging 19.1°C (66°F).

Compared to August, this month is about 4°C cooler with 2 fewer rainy days. Temperatures begin dropping heading into October.

Monthly September Averages

Temperature

17°C / 11°C

Feels Like

16°C / 10°C

Rain

9 days · 49 mm

Sunshine

8.1h / day

Humidity

81% — Very Humid

Wind

17 km/h

Wind Direction

SW (216°)

Gusts

36 km/h

Daylight

12.8 h

Cloud Cover

64%

Clear Sky Days

1.9

UV Index

3.3 — Moderate

Sea Temperature

18°C

Dew Point

11°C — Comfortable

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

High Low

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 06:24

Daylight 12.9h

Sunset 19:15

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	1°C / -3°C	-3°C / -7°C	10days (45 mm) Wet	2.1h Poor	87% Very Muggy	0.5 Low	Poor	View Details
February	3°C / -2°C	-2°C / -7°C	8days (32 mm) Wet	4.3h Fair	84% Humid	1.1 Low	Poor	View Details
March	6°C / -1°C	2°C / -5°C	8days (35 mm) Wet	6.8h Fair	78% Humid	2.5 Moderate	Poor	View Details
April	10°C / 2°C	7°C / -2°C	7days (30 mm) Good	10.3h Excellent	70% Muggy	3.5 Moderate	Fair	View Details
May best	16°C / 8°C	14°C / 5°C	9days (41 mm) Wet	12.5h Excellent	67% Muggy	5.1 High	Good	View Details
June best	21°C / 13°C	20°C / 12°C	10days (52 mm) Wet	13.5h Excellent	67% Muggy	5.5 High	Excellent	View Details
July best	22°C / 15°C	22°C / 14°C	11days (70 mm) Wet	13h Excellent	72% Muggy	5.2 High	Excellent	View Details
August best	21°C / 14°C	20°C / 13°C	11days (75 mm) Wet	10.6h Excellent	76% Humid	4.3 Moderate	Excellent	View Details
September best	17°C / 11°C	16°C / 10°C	9days (49 mm) Wet	8.1h Good	81% Humid	3.3 Moderate	Good	View Details
October	11°C / 7°C	8°C / 4°C	11days (64 mm) Wet	4.6h Fair	85% Humid	1.6 Low	Fair	View Details
November	6°C / 2°C	2°C / -1°C	9days (42 mm) Wet	2.3h Poor	89% Very Muggy	0.7 Low	Poor	View Details
December	3°C / -1°C	-1°C / -5°C	11days (43 mm) Wet	1.4h Poor	90% Very Muggy	0.4 Low	Poor	View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Layered clothingLight jacketUmbrellaComfortable walking shoes

Frequently Asked Questions

Expand all

Is September a good time to visit Norrköping?

September is typically good for visiting Norrköping, with average highs of 17°C (63°F) and around 9 rainy days. Norrköping, Sweden in September has mild conditions, with highs averaging 17.1°C (63°F) and noticeably cooler mornings.

Does it rain a lot in Norrköping in September?

Norrköping typically sees around 9 rainy days in September with 49 mm (1.9 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Norrköping in September?

Nights in Norrköping during September are cool at around 11°C (52°F). Bring a jacket or sweater for evenings.

What should I pack for Norrköping in September?

With highs of 17°C (63°F) and lows of 11°C (52°F) in September, we recommend: Layered clothing, Light jacket, Umbrella, Comfortable walking shoes. Comfortable walking shoes are essential.

Is September among the best months weather-wise in Norrköping?

Yes, September offers some of the best weather conditions in Norrköping with comfortable temperatures and lower chances of rain.

What is the UV index in Norrköping in September?

The average UV index in Norrköping during September is 3 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in Norrköping in September?

Norrköping gets approximately 13 hours of daylight per day in September, with around 8 hours of sunshine.

Does it snow in Norrköping in September?

Snow is uncommon in Norrköping during September based on 10-year climate averages.

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