Mälaren Weather in September
September in Mälaren averages 18°C (64°F) during the day and 7°C (45°F) at night. Around 56 mm (2.2 in) of rainfall is typical for this time of year.
Rainfall in Mälaren in September
Looking at the last 30 years, the data shows about 14 days with rain, averaging 56 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 Mälaren in September
If you're visiting Mälaren in September, expect highs of 18°C (64°F) and overnight lows around 7°C (45°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Mälaren in September
The area enjoys a moderate level of sunlight, with around 154 hours. It's a good balance between sunny and cloudy days.For Mälaren itself, June, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sweden, check out our Mälaren's climate page.
Mälaren Temperature in September
Min Temperature
7°C (45°F)
Max Temperature
18°C (64°F)
Chance of Rain
47%
Precipitation
56 mm (2.2 in)
Rainy days
14 days
Sunshine
154 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mälaren typically drop from around 18°C (64°F) at the start of September to approximately 13°C (55°F) by the end. Nights are cold, with lows typically ranging from 5°C (41°F) to 10°C (50°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Mälaren in September
Browse day-by-day weather records for Mälaren spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mälaren historical weather extremes in September
Based on weather observations in Mälaren between 1976 and 2025, these are the recorded extremes during September.
- Mälaren recorded its highest September temperature of 28°C (82°F) on September 5, 2024.
- On September 28, 2003, Mälaren saw its coldest September day with temperatures maxing out at 7°C (45°F).
- Nighttime temperatures dropped to -4°C (25°F) on September 30, 2001, marking the coldest September night on record.
Best Places in Sweden in September
Find out more about the weather in Sweden and which places have the best travel conditions in this month. See all of Sweden in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Mälaren in September
For Mälaren 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Mälaren in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sweden, check out our Mälaren's climate page.
See the full Mälaren climate overview or explore weather in Sweden.
