Average temperatures, rainfall and packing tips for Helsinki, Finland in September
🌡️ Avg high
18°C
🌙 Avg low
12°C
🌧️ Rainfall
~115 mm
📊 Warmth rank
#4 of 12
September in Helsinki at a glance
September in Helsinki is typically mild, with average daytime highs around 18°C and nights near 12°C. Temperature-wise it sits mid-range for Helsinki (the 4th warmest month).
September is typically the wettest month of the year in Helsinki, with around 115 mm of rain - plan around showers.
What to pack for Helsinki in September
Medium layers: long sleeves and a sweater
A light-to-medium jacket
A rain jacket or umbrella - this is one of the wetter months
Helsinki - year at a glance
HighLow · September highlighted
Is September a good time to visit Helsinki?
🧳 September is one of the most comfortable months to visit Helsinki - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.
In September, Helsinki averages a daytime high of about 18°C and a night-time low of around 12°C, based on recent historical data.
Does it rain in Helsinki in September?
September is typically the wettest month of the year in Helsinki, with around 115 mm of rain - plan around showers.
Is September a good time to visit Helsinki?
September is one of the most comfortable months to visit Helsinki - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.