Sumy Climate by Month
Sumy, Ukraine
Warm summers and freezing winters, with rain spread through the year.
Warm summers and freezing winters, with rain spread through the year: that's Sumy's climate in short. Afternoon highs range from 29°F (-2°C) in January to 80°F (27°C) in July, and February nights average 20°F (-7°C). It gets 22 in (552 mm) of rain a year, spread across the months.
- Warmest month
- 80°F(27°C)
- Average high, July
- Coldest nights
- 20°F(-7°C)
- Average low, February
- Rain per year
- 22 in(552 mm)
- No clear rainy season
- Humidity
- 70%
- Sunniest: June
Best and worst months in Sumy
Best for weatherJune and August are the best time for weather in Sumy: highs near 78°F (26°C) and about 2.1 in (53 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 29°F (-2°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Sumy weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 29°F(-2°C) | 20°F(-7°C) | 1.7 in(43 mm) | 68% | 0.8 |
| FebFebruary | 31°F(0°C) | 20°F(-7°C) | 1.3 in(32 mm) | 86% | 1.5 |
| MarMarch | 41°F(5°C) | 27°F(-3°C) | 1.5 in(37 mm) | 76% | 2.7 |
| AprApril | 58°F(14°C) | 39°F(4°C) | 1.4 in(36 mm) | 60% | 4.0 |
| MayMay | 70°F(21°C) | 49°F(10°C) | 2.2 in(57 mm) | 57% | 5.4 |
| JunJuneBest | 77°F(25°C) | 56°F(13°C) | 2.5 in(64 mm) | 59% | 6.0 |
| JulJuly | 80°F(27°C) | 60°F(16°C) | 2.7 in(69 mm) | 64% | 5.8 |
| AugAugustBest | 79°F(26°C) | 57°F(14°C) | 1.7 in(42 mm) | 60% | 5.1 |
| SepSeptember | 67°F(20°C) | 48°F(9°C) | 1.9 in(48 mm) | 68% | 3.3 |
| OctOctober | 54°F(12°C) | 38°F(3°C) | 1.8 in(46 mm) | 76% | 1.8 |
| NovNovember | 39°F(4°C) | 29°F(-1°C) | 1.5 in(39 mm) | 89% | 0.8 |
| DecDecember | 31°F(-1°C) | 22°F(-5°C) | 1.5 in(39 mm) | 82% | 0.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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