Mäntyharju Weather in September

September in Mäntyharju brings moderate temperatures, with highs of 16°C (61°F) and nights dropping to 8°C (46°F). Rainfall is on the higher side this month, averaging around 61 mm (2.4 in), so keep a rain jacket handy.

Rainfall in Mäntyharju in September

Typically around 17 days of rainfall are expected, averaging 61 mm (2.4 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Mäntyharju in September

Daytime highs in Mäntyharju in September reach 16°C (61°F), with nights around 8°C (46°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 8°C (46°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Should you favor a climate that's both dry and comfortably warm, June, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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• January
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For a detailed overview over the year and the best time to visit Finland, check out our Mäntyharju's climate page.

Mäntyharju Temperature in September

Min Temperature 8°C (46°F)  

Max Temperature 16°C (61°F)  

Chance of Rain 57%  

Precipitation 61 mm (2.4 in)  

Rainy days 17 days  

What to Wear in Mäntyharju in September

The weather can swing between comfortable and chilly in September, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Wet weather is likely, so pack waterproof gear for multiple rainy days.

What To Do in Mäntyharju in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

6/10

Walking

6/10

Barbeque

5/10

Camping

4/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Finland, check out our Mäntyharju's climate page.

More climate data for Mäntyharju

Temperature Rainfall

See the full Mäntyharju climate overview or explore weather in Finland.