Year-round weather and climate in Sumy, Ukraine
Average temperatures in Sumy run from an average low of -6°C21°F in February up to an average high of 27°C81°F in July. September is the driest month at 2 rainy days; October the wettest at 13. Here is the annual climate data, so you know what you are packing for.
Good to know
- Population
- 256K
- Currency
- UAH
- Language
- Ukrainian
- Time zone
- Kiev
Best time to visit
The most pleasant weather falls in July, August, and September, offering a perfect balance of comfortable temperatures and clear skies.
Rain character
Moderate Showers: Rainfall is standard and manageable. A compact travel umbrella or light rain jacket will easily get you through any wet days.
Day-to-night swing
Evening Chill: Temperatures drop by a noticeable 11°C20°F when the sun goes down. A light sweater or jacket is usually all you need for evening plans.
Seasonality Profile
True Four Seasons: Dramatic contrasts. Freezing winters, transitional shoulders, and blazing summers.
Evening vibe
Cozy Indoor Culture: Evenings are generally crisp, damp, or sweltering. Nightlife centers around indoor venues.
Sightseeing stamina
All-Day Strolling: Weather is generally forgiving for long walking days. Comfortable sneakers are your most important packing item.
Average temperatures, sunshine, and rainfall
Average monthly weather in Sumy, based on recent historical data. Essential insights on temperature swings, expected rainfall, and daily sunshine.
Bars span the average daily low to high. Sep is typically driest at 2 days (10mm); Oct the wettest at 13 days (95mm).
| Month | Average high | Average low | Sunshine hours | Rainy days | Total rainfall |
|---|---|---|---|---|---|
| Jan | 1°C / 33°F | -5°C / 23°F | 3h | 10 | 35mm |
| Feb | 0°C / 32°F | -6°C / 21°F | 4h | 10 | 38mm |
| Mar | 9°C / 49°F | 0°C / 33°F | 7h | 8 | 39mm |
| Apr | 16°C / 61°F | 6°C / 43°F | 9h | 10 | 45mm |
| May | 19°C / 67°F | 9°C / 48°F | 12h | 8 | 48mm |
| Jun | 24°C / 75°F | 14°C / 58°F | 12h | 12 | 79mm |
| Jul | 27°C / 81°F | 17°C / 63°F | 14h | 11 | 63mm |
| Aug | 26°C / 79°F | 15°C / 60°F | 12h | 7 | 63mm |
| Sep | 23°C / 73°F | 12°C / 53°F | 11h | 2 | 10mm |
| Oct | 13°C / 56°F | 6°C / 43°F | 5h | 13 | 95mm |
| Nov | 7°C / 44°F | 2°C / 35°F | 3h | 12 | 84mm |
| Dec | 1°C / 34°F | -2°C / 28°F | 1h | 12 | 48mm |
Weather data by Open-Meteo.com (opens in a new tab)
Frequently Asked Questions
When is the sunniest time of year to visit Sumy?
The most sunshine in Sumy comes around July, averaging 14 hours a month. If you're heading there then, pack your sunglasses and sunscreen.
What clothes should I pack for Sumy?
Your packing list depends entirely on when you travel. Temperatures in Sumy swing from an average low of -6°C21°F in February up to 27°C81°F in July. The Packola app builds a tailored packing list for you based on the live weather forecast for your exact travel dates.
Do I need to pack an umbrella for Sumy?
Sumy gets rain on about 115 days out of the year. The wettest month is October. If you're traveling during the rainy season, you'll definitely want to pack an umbrella and a light rain jacket.
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in Sumy with Packola.
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