Climate averages 1991–2020
Sumy weather
in May.
A mild, moderately wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Sumy: daytime highs average 19.5°C and nights cool to about 9.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 61 mm of rain on roughly 11 days, which makes May a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 30 min on an average May day.
The nearest other city in this atlas is Konotop (117 km away). In May its highs average 19.5°C, about as warm as Sumy, with 60 mm of rain.
Among the 59 cities listed in Ukraine, Sumy ranks joint 44th of 59 for the warmest May highs and joint 42nd of 59 for the driest May (rainfall, lowest first). The mean May high of those 59 cities is 20.2°C; Sumy is 0.6°C cooler than that mean.
From May to June, average highs rise by 3.7°C to 23.2°C, and monthly rainfall rises from 61 mm to 67 mm.
The annual picture
May in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sumy climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -3.0°C-7.5°C | -7.5°C | 42 | 9.9 | 8.58 h |
| February | -1.9°C-7.8°C | -7.8°C | 35 | 8.9 | 10.010 h |
| March | 4.0°C-3.7°C | -3.7°C | 42 | 9.6 | 11.812 h |
| April | 13.2°C3.3°C | 3.3°C | 43 | 9.3 | 13.814 h |
| May, selected | 19.5°C9.5°C | 9.5°C | 61 | 11.3 | 15.516 h |
| June | 23.2°C13.7°C | 13.7°C | 67 | 11.0 | 16.416 h |
| July | 25.2°C15.9°C | 15.9°C | 73 | 11.2 | 16.016 h |
| August | 24.6°C15.0°C | 15.0°C | 47 | 7.6 | 14.615 h |
| September | 18.5°C10.1°C | 10.1°C | 51 | 8.2 | 12.713 h |
| October | 11.1°C4.4°C | 4.4°C | 50 | 8.8 | 10.811 h |
| November | 3.4°C-1.1°C | -1.1°C | 41 | 8.1 | 9.09 h |
| December | -1.4°C-5.6°C | -5.6°C | 40 | 9.2 | 8.08 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Konotop in MayUkraine · 117 kmHigh 19.5°C · Low 9.7°C · 60 mm rain
- Belgorod in MayRussia · 130 kmHigh 19.9°C · Low 9.8°C · 56 mm rain
- Kursk in MayRussia · 132 kmHigh 19.0°C · Low 9.2°C · 59 mm rain
- Shostka in MayUkraine · 140 kmHigh 18.9°C · Low 9.3°C · 61 mm rain
- Kharkiv in MayUkraine · 146 kmHigh 20.4°C · Low 10.1°C · 53 mm rain
- Poltava in MayUkraine · 149 kmHigh 20.4°C · Low 10.2°C · 52 mm rain
- Zheleznogorsk (Kursk Oblast), Russia in MayRussia · 163 kmHigh 18.6°C · Low 9.2°C · 60 mm rain
- Gubkin in MayRussia · 195 kmHigh 19.7°C · Low 9.6°C · 53 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sumy) is explained once on the Sumy year overview and on the Sources, method and limits page.