Kostroma Weather in September
Thinking of visiting Kostroma in September? Expect moderate temperatures reaching 16°C (61°F) during the day, dropping to 7°C (45°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Kostroma in September
Analyzing past climate data, one can expect approximately 16 days of rain, averaging 72 mm (2.8 in). Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.
Temperature in Kostroma in September
September in Kostroma brings typical temperatures with highs around 16°C (61°F) and lows of 7°C (45°F). The difference between afternoon and evening temperatures is usually noticeable. 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 Kostroma in September
The area experiences a moderate amount of sunshine, with approximately 139 hours of sunlight expected. This means a decent mix of sun and overcast.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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Russia, check out our Kostroma's climate page.
Kostroma Temperature in September
Min Temperature
7°C (45°F)
Max Temperature
16°C (61°F)
Chance of Rain
53%
Precipitation
72 mm (2.8 in)
Rainy days
16 days
Humidity
82%
Sunshine
139 hours
Percentage Sunshine
Historical weather for Kostroma in September
Browse day-by-day weather records for Kostroma spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kostroma historical weather extremes in September
Our historical data for Kostroma spans 2006 to 2025, revealing these weather extremes.
- The warmest day in September was on September 25, 2015, with a maximum of 28°C (82°F).
- The lowest daytime temperature in September was 3°C (37°F), recorded on September 30, 2013.
- Kostroma registered its coldest September night on September 30, 2025, with temperatures dropping to -3°C (27°F).
- The wettest September day on record brought 27 mm (1.1 in) of precipitation to Kostroma (September 6, 2006).
Best Places in Russia in September
Find out more about the weather in Russia and which places have the best travel conditions in this month. See all of Russia in September →
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What to Wear in Kostroma in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Kostroma 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 Russia, check out our Kostroma's climate page.
Temperature Rainfall Sunshine Humidity
See the full Kostroma climate overview or explore weather in Russia.
