Jönköping Weather in September
September in Jönköping brings moderate temperatures around 17°C (63°F) during the day, dropping to 7°C (45°F) at night, with quite a bit of rainfall expected, averaging around 70 mm (2.8 in) for the month.
Rainfall in Jönköping in September
You can expect rain on around 16 days based on historical patterns, with 70 mm (2.8 in) average for the month. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.
Temperature in Jönköping in September
Daytime highs in Jönköping in September reach 17°C (63°F), with nights around 7°C (45°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Jönköping in September
The area enjoys a moderate level of sunlight, with around 132 hours. It's a good balance between sunny and cloudy days.
Wind Speed in Jönköping in September
Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Jönköping.
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 Jönköping's climate page.
Jönköping Temperature in September
Min Temperature
7°C (45°F)
Max Temperature
17°C (63°F)
Chance of Rain
52%
Precipitation
70 mm (2.8 in)
Rainy days
16 days
Humidity
80%
Windspeed
4 m/s (8 knots)
Sunshine
132 hours
Percentage Sunshine
32%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Jönköping typically drop from around 17°C (63°F) at the start of September to approximately 13°C (55°F) by the end. Nights are cold, with lows typically ranging from 4°C (39°F) to 8°C (46°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 Jönköping in September
Browse day-by-day weather records for Jönköping spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Jönköping historical weather extremes in September
Based on weather observations in Jönköping between 1976 and 2025, these are the recorded extremes during September.
- On September 4, 2024, temperatures climbed to 29°C (84°F), marking the warmest September day on record.
- On September 30, 1995, Jönköping saw its coldest September day with temperatures maxing out at 4°C (39°F).
- Nighttime temperatures dropped to -7°C (19°F) on September 27, 1986, 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
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What to Wear in Jönköping in September
For Jönköping 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 Jönköping 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 Jönköping's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Jönköping climate overview or explore weather in Sweden.
