Today
Sun, Jun 21
Partly cloudy
27°14°
- Rain chance
- 0%
- Precip
- 0 mm
- Max wind
- 16 km/h
Sumy weather forecast
Sumy, Ukraine · Kyiv time · 50.92°, 34.80°
Current conditions · 6:00 PM local
Current conditions in Sumy
26°C
Partly cloudy
Feels like 24°C
- Humidity
- 31%
- Wind
- 13 km/h NNW
- Gusts
- 36 km/h
- UV index
- 2.15
- Visibility
- 46.5 km
Right now
Conditions in Sumy at the moment: partly cloudy, 26 °C. It feels colder than it reads, more like 24 °C. Wind is from the NNW at 13 km/h, gusting to 36 km/h. Humidity stands at 31% with sea-level pressure near 1020 hPa.
At a glance
Today
27° / 14°Partly cloudy
Tomorrow
29° / 16°Slight rain showers · 45% chance of rain
Upcoming · to Saturday
29° / 12°A steady stretch: highs near 29°, lows around 12°, and no day above a 40% rain chance through Saturday.
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Next 3 days
Expect partly cloudy today, between 14 °C and 27 °C. Gusts may reach 40 km/h from the NNW. Expect slight rain showers tomorrow, between 16 °C and 29 °C. Rain chance peaks at 45% with around 1.9 mm possible. Gusts may reach 45 km/h from the WNW. Tuesday looks like overcast; temperatures run from 19 °C up to 29 °C.
Tomorrow
Mon, Jun 22
Slight rain showers
29°16°
- Rain chance
- 45%
- Precip
- 1.9 mm
- Max wind
- 14 km/h
Tuesday
Tue, Jun 23
Overcast
29°19°
- Rain chance
- 5%
- Precip
- 0 mm
- Max wind
- 13 km/h
Next 48 hours
- 12 AM17°0%3 km/h
- 1 AM17°0%3 km/h
- 2 AM17°0%3 km/h
- 3 AM16°0%5 km/h
- 4 AM15°0%4 km/h
- 5 AM14°0%4 km/h
- 6 AM15°0%3 km/h
- 7 AM18°0%4 km/h
- 8 AM20°0%7 km/h
- 9 AM22°0%11 km/h
- 10 AM23°0%14 km/h
- 11 AM24°0%14 km/h
- 12 PM25°0%16 km/h
- 1 PM26°0%14 km/h
- 2 PM26°0%15 km/h
- 3 PM27°0%15 km/h
- 4 PM27°0%15 km/h
- 5 PM27°0%15 km/h
- 6 PM26°0%13 km/h
- 7 PM26°0%11 km/h
- 8 PM24°0%7 km/h
- 9 PM22°0%4 km/h
- 10 PM20°0%5 km/h
- 11 PM19°0%5 km/h
- 12 AM18°0%5 km/h
- 1 AM17°0%4 km/h
- 2 AM16°0%4 km/h
- 3 AM16°0%4 km/h
- 4 AM16°0%4 km/h
- 5 AM16°0%4 km/h
- 6 AM17°0%3 km/h
- 7 AM19°0%4 km/h
- 8 AM22°0%6 km/h
- 9 AM24°0%7 km/h
- 10 AM26°0%8 km/h
- 11 AM27°5%10 km/h
- 12 PM27°8%12 km/h
- 1 PM28°3%12 km/h
- 2 PM29°10%13 km/h
- 3 PM29°10%12 km/h
- 4 PM28°43%14 km/h
- 5 PM25°45%12 km/h
- 6 PM24°35%9 km/h
- 7 PM23°20%6 km/h
- 8 PM22°5%5 km/h
- 9 PM21°0%4 km/h
- 10 PM20°0%4 km/h
- 11 PM20°3%4 km/h
In depth
Sumy starts the period under partly cloudy, with the mercury at 26 °C and a feels-like of 24 °C. Today's forecast calls for partly cloudy, topping out near 27 °C before falling back to 14 °C overnight. Winds blow mainly from the NNW around 16 km/h, with gusts up to 40 km/h. Highs ease downward through the week, ranging 18 to 29 °C. Rain is in the picture on tomorrow, Thursday, Saturday, with roughly 12 mm expected in total across the week. Tomorrow brings slight rain showers with a high of 29 °C and a 45% chance of precipitation. The UV index reaches 7 today, so sun protection is sensible during the middle of the day. Sunrise comes at 04:26 and sunset at 20:58, giving 16.5 hours of daylight. Current humidity sits at 31% with pressure near 1020 hPa. Looking further out, Thursday shows slight rain showers with a high around 23 °C, while Saturday ends the week at 18 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.
Air quality
33
Good
US AQI · European AQI 28
Air quality in Sumy is currently good, with a US AQI of 33 (European AQI 28). The dominant pollutant right now is ozone. Air quality is healthy; no precautions needed. Fine particulate matter (PM2.5) measures 3.4 µg/m³. Pollen in the air today: grass (low) — allergy sufferers take note.
Pollutants
- PM2.5
- 3.4 µg/m³
- PM10
- 4.4 µg/m³
- Ozone (O₃)
- 69 µg/m³
- NO₂
- 1 µg/m³
- SO₂
- 0.3 µg/m³
- CO
- 112 µg/m³
- Dust
- 0 µg/m³
Pollen
- Grass
- 18.4 gr/m³
- Birch
- 0.3 gr/m³
- Alder
- 0 gr/m³
- Olive
- 0 gr/m³
- Mugwort
- 0 gr/m³
- Ragweed
- 0 gr/m³
Sun & UV
- Sunrise
- 4:26 AM
- Sunset
- 8:58 PM
- Daylight
- 16h 32m
- Max UV
- 6.55 High
Wind
- Wind
- 13 km/h
- Gusts
- 36 km/h
- Direction
- NNW (343°)
Farming weather
Soil temperatures today read surface 15.4 °C, 6 cm 19.5 °C, 18 cm 20.2 °C, 54 cm 16.1 °C. Soil moisture sits at 0-1 cm at 0.11 m³/m³, 3-9 cm at 0.14 m³/m³, 27-81 cm at 0.21 m³/m³. For wheat, the root-zone reading is below the ideal 0.2-0.35 m³/m³ band. Reference evapotranspiration totals 31 mm against only 12 mm of expected rain — a 19 mm deficit, so irrigation will be needed this week. A suitable spraying window opens around 05:00 on 2026-06-21, with winds at or below 15 km/h and no rain expected. Projected growing degree days over the next week: wheat 109, maize 71.
- Topsoil moisture
- 0.118 m³/m³
- Soil temp
- 15°C
- ET₀ today
- 5.28 mm
- Spray window
- ~5:00
- Rain (next 7d)
- 11.5 mm
- Wind
- 13 km/h
- Humidity
- 31%
Advisory summary
No weather alert thresholds are crossed for Sumy in the current forecast (derived from forecast data, not official warnings). Conditions may still change — check back for updates.
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All data for Sumy
| Variable | Value |
|---|---|
| City | Sumy, Sumy, Ukraine |
| Coordinates | 50.91741, 34.79906 |
| Elevation | 171 m |
| Timezone | Europe/Kyiv |
| Population | 256,474 |
| Observed at (local) | 6:00 PM |
| Temperature (2 m) | 26°C |
| Apparent temperature | 24°C |
| Relative humidity (2 m) | 31% |
| Dew point (2 m) | 8°C |
| Precipitation (last hour) | 0 mm |
| Rain | 0 mm |
| Showers | 0 mm |
| Snowfall | 0 cm |
| Weather code (WMO) | 2 |
| Cloud cover | 49% |
| Surface pressure | 1004 hPa |
| Sea-level pressure | 1020 hPa |
| Wind speed (10 m) | 13 km/h |
| Wind gusts (10 m) | 36 km/h |
| Wind direction (10 m) | 343° (NNW) |
| Visibility | 46.5 km |
| UV index | 2.15 |
| Day / night | Day |
| Today max / min | 27°C / 14°C |
| Today feels-like max / min | 25°C / 14°C |
| Today precipitation sum | 0 mm |
| Today rain sum | 0 mm |
| Today snowfall sum | 0 cm |
| Today max precip probability | 0% |
| Today max wind / gusts | 16 km/h / 40 km/h |
| Dominant wind direction | 345° (NNW) |
| Sunrise / sunset | 4:26 AM / 8:58 PM |
| Daylight duration | 16h 32m |
| Sunshine duration | 15h 12m |
| Max UV index | 6.55 |
| Reference evapotranspiration (ET₀) | 5.28 mm |
| Topsoil moisture (0–1 cm) | 0.118 m³/m³ |
| Surface soil temperature | 15°C |
| US AQI | 33 |
| European AQI | 28 |
| PM2.5 | 3.4 µg/m³ |
| PM10 | 4.4 µg/m³ |
| Ozone (O₃) | 69 µg/m³ |
| Nitrogen dioxide (NO₂) | 1 µg/m³ |
| Sulphur dioxide (SO₂) | 0.3 µg/m³ |
| Carbon monoxide (CO) | 112 µg/m³ |
| Dust | 0 µg/m³ |
| Alder pollen | 0 gr/m³ |
| Birch pollen | 0.3 gr/m³ |
| Grass pollen | 18.4 gr/m³ |
| Mugwort pollen | 0 gr/m³ |
| Olive pollen | 0 gr/m³ |
| Ragweed pollen | 0 gr/m³ |
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<iframe src="https://weathertomorrow.cloud/embed/city/ua/sumy/sumy" width="320" height="180" frameborder="0" title="Sumy weather" loading="lazy"></iframe>Frequently asked questions
Will it rain in Sumy tomorrow?
There is a moderate chance of rain in Sumy tomorrow, peaking at 45%.
What is the temperature in Sumy today?
Today Sumy sees partly cloudy with a high of 27 °C and a low of 14 °C.
How hot will it be in Sumy tomorrow?
Tomorrow's high in Sumy is forecast at 29 °C with slight rain showers.
Is it windy in Sumy today?
Yes, yes — gusts up to 40 km/h today.
What is the UV index in Sumy today?
The UV index peaks at 7 today, which is high.
What time is sunrise and sunset in Sumy today?
The sun rises at 04:26 and sets at 20:58 local time.
Is the air quality in Sumy good today?
Air quality is good right now, with a US AQI reading of 33.