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Sumy Weather in May
Sumy in May sees pleasant daytime temperatures of 21°C (70°F) and nighttime lows of 10°C (50°F). Rainfall is fairly high this month at around 66 mm (2.6 in), so pack a rain jacket to stay dry.
Rainfall in Sumy in May
You can typically expect 12 days of rain this month, averaging around 66 mm (2.6 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Sumy in May
Sumy in May is worth a visit. The temperature is excellent, with 21°C (70°F) during the day and 10°C (50°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 10°C (50°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.If you're inclined towards comfortable temperatures and drier conditions, May is a good time to visit Sumy.
Sumy Temperature in May
Min Temperature
10°C (50°F)
Max Temperature
21°C (70°F)
Chance of Rain
41%
Precipitation
66 mm (2.6 in)
Rainy days
12 days
Humidity
62%
Sumy Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sumy - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Sumy typically rise from around 18°C (64°F) at the start of May to approximately 22°C (72°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 13°C (55°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Sumy in May
Browse day-by-day weather records for Sumy spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sumy historical weather extremes in May
According to our 50 years of weather records for Sumy, the following extremes were recorded between 1976 and 2026.
- On May 26, 2007, temperatures climbed to 33°C (91°F), marking the warmest May day on record.
- The coldest night in May in Sumy was on May 5, 1999, with a minimum of -4°C (25°F).
Best Places in Ukraine in May
Find out more about the weather in Ukraine and which places have the best travel conditions in this month. See all of Ukraine in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Sumy in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.
What To Do in Sumy in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling10/10 -
Walking10/10 -
Camping8/10 -
Outdoor sports10/10
Sumy 3-Day Forecast
More climate data for Sumy
See the full Sumy climate overview or explore weather in Ukraine.
Popular in May
Where to go in May - average daytime high across popular destinations.
Dnepropetrovsk
23°C (73°F) Odessa
23°C (73°F) Kharkov
22°C (72°F) Kiev22°C (72°F) Lviv20°C (68°F) Truskavets19°C (66°F) Yaremche
17°C (63°F) Bukovel17°C (63°F) Bucket list
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