Kalmar Weather in September
September in Kalmar brings moderate temperatures around 18°C (64°F) during the day, dropping to 11°C (52°F) at night, with some rainfall expected.
Rainfall in Kalmar in September
Typically around 13 days of rainfall are expected, averaging 54 mm (2.1 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Kalmar in September
In September, Kalmar sees moderate temperatures, with highs of 18°C (64°F). Nights drop to around 11°C (52°F). Conditions are often most pleasant around the middle of the day. With lows of 11°C (52°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Kalmar in September
The area enjoys a balanced 183 hours of sunlight, ensuring it's neither too overcast nor too sunny.
Average water temperature in September
At 14°C (57°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Kalmar.
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 Kalmar's climate page.
Kalmar Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
18°C (64°F)
Water Temperature
14°C (57°F)
Chance of Rain
43%
Precipitation
54 mm (2.1 in)
Rainy days
13 days
Humidity
81%
Sunshine
183 hours
Percentage Sunshine
48%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kalmar typically drop from around 19°C (66°F) at the start of September to approximately 15°C (59°F) by the end. Nights are cool, with lows typically ranging from 6°C (43°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 Kalmar in September
Browse day-by-day weather records for Kalmar spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kalmar historical weather extremes in September
The extremes listed below come from historical weather data collected in Kalmar from 1976 through 2025.
- The warmest day in September was on September 4, 2024, with a maximum of 28°C (82°F).
- The lowest daytime temperature in September was 8°C (46°F), recorded on September 26, 1990.
- The lowest overnight temperature recorded in September was -4°C (25°F) (September 27, 1986).
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 Kalmar 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. Expect water temperatures of around 14°C (57°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Kalmar 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 Kalmar's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Kalmar climate overview or explore weather in Sweden.
