Västerås Weather in September
During September, Västerås experiences moderate daytime temperatures of 17°C (63°F) and cooler nights around 7°C (45°F). Some rainfall is typical during this period.
Rainfall in Västerås in September
Typically, about 14 days will experience rainfall, with an average of 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 Västerås in September
If you're visiting Västerås in September, expect highs of 17°C (63°F) and overnight lows around 7°C (45°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 7°C (45°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Västerås in September
The area experiences a moderate amount of sunshine, with approximately 154 hours of sunlight expected. This means a decent mix of sun and overcast.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Västerås.
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 Västerås's climate page.
Västerås Temperature in September
Min Temperature
7°C (45°F)
Max Temperature
17°C (63°F)
Chance of Rain
47%
Precipitation
57 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 Västerås typically drop from around 18°C (64°F) at the start of September to approximately 14°C (57°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 Västerås in September
Browse day-by-day weather records for Västerås spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Västerås historical weather extremes in September
The extremes listed below come from historical weather data collected in Västerås from 1976 through 2025.
- Västerås recorded its highest September temperature of 28°C (82°F) on September 5, 2024.
- Västerås experienced its chilliest September day on September 28, 2003, reaching only 7°C (45°F).
- Nighttime temperatures dropped to -5°C (23°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 Västerås in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Västerås 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 Västerås's climate page.
See the full Västerås climate overview or explore weather in Sweden.
