When to go · Jämsä
Jämsä in September
Good month. Outside the best window (Dec–Mar for snow; Jun–Aug for mountain‑bike festivals). Across Finland: Ruska autumn colours in Lapland and the first auroras over lakes that are not yet frozen.
Key facts
- Verdict
- Good
- Temperature
- 15°C (59°F)59°F (15°C) / 7°C (45°F)45°F (7°C)
- average high / low
- Rain days
- 8
- Crowds
- Medium
- Finland overall
- Prices
- Medium
- Finland overall
Verdict
Outside the best window (Dec–Mar for snow; Jun–Aug for mountain‑bike festivals). Across Finland: Ruska autumn colours in Lapland and the first auroras over lakes that are not yet frozen.
Is another month better than September?
September is rated good. These months rate higher:
- DecemberGreatInside Jämsä's best window: Dec–Mar for snow; Jun–Aug for mountain‑bike festivals.
- JanuaryGreatInside Jämsä's best window: Dec–Mar for snow; Jun–Aug for mountain‑bike festivals.
- FebruaryGreatInside Jämsä's best window: Dec–Mar for snow; Jun–Aug for mountain‑bike festivals.
- MarchGreatInside Jämsä's best window: Dec–Mar for snow; Jun–Aug for mountain‑bike festivals.
Weather in September
- JämsäHighs around 15 °C (59 °F), lows around 7 °C (45 °F), rain on about 8 daysHighs around 59 °F (15 °C), lows around 45 °F (7 °C), rain on about 8 days
Crowds and prices
- Crowds · Finland overall
- Medium
- Prices · Finland overall
- Medium
Finland overall: Ruska autumn colours in Lapland and the first auroras over lakes that are not yet frozen.
Compare two months
Weather, crowds and prices for any two months in Jämsä, side by side.
Verdict
Sep: Good
Jan: Great (better)
Daytime high
Sep: 15 °C (59 °F)59 °F (15 °C)
Jan: -5 °C (23 °F)23 °F (-5 °C)
Night low
Sep: 7 °C (45 °F)45 °F (7 °C)
Jan: -12 °C (10 °F)10 °F (-12 °C)
Rain days
Sep: 8
Jan: 5 (better)
Crowds
Sep: Medium
Jan: Medium
Prices
Sep: Medium
Jan: Medium
Festivals listed
Sep: 0
Jan: 0
September: Outside the best window (Dec–Mar for snow; Jun–Aug for mountain‑bike festivals). Across Finland: Ruska autumn colours in Lapland and the first auroras over lakes that are not yet frozen.
January: Inside Jämsä's best window: Dec–Mar for snow; Jun–Aug for mountain‑bike festivals.
Jämsä: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings