Oster, Ukraine experiences average highs of 13°C (55°F) and lows of 6°C (43°F) throughout the year. Rainfall is moderate, averaging about 9 rainy days per month. Average highs have warmed by 0.9°C (1.6°F) across the available records.
Oster, Ukraine Weather & Climate 2026
Monthly climate averages for Oster, Ukraine. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Nov 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.9/10
Best: May, June, July, August, September
UV Index
3
Low
Temperature 13°C / 6°C
Feels Like 11°C / 3°C
Rainy Days 9
Rainfall 51 mm
Sunshine 7 h
Humidity 74%
Wind Speed 18 km/h
Dew Point 5°C
Snow Days 8 days
Frost Days 15 days
Hottest Month
26°C
July
Avg Low17°C
Rain10days
Coldest Month
-5°C
January
Avg High-1°C
Rain10days
Driest Month
6days
September
Avg High20°C
Avg Low12°C
Windiest Month
19 km/h
January (Gusts 35)
Worst Time to Visit
Consider avoiding January, February, November, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 04:43
Daylight 16.5h
Sunset 21:13
Live conditions—
Oster on the map · live conditions
Oster, Ukraine
- Continent
- Europe
- Country
- Ukraine
- City
- Oster
- Population
- 5.6K
- Coordinates
- 50.95°, 30.88°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 4°C
Rain 9 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 25°C
Avg Low 16°C
Rain 9 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 13°C
Avg Low 6°C
Rain 8 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 1°C
Avg Low -4°C
Rain 10 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: -1°C / -5°C . Feb: 1°C / -5°C . Mar: 7°C / -1°C . Apr: 14°C / 5°C . May: 19°C / 10°C . Jun: 25°C / 16°C . Jul: 26°C / 17°C . Aug: 26°C / 16°C . Sep: 20°C / 12°C . Oct: 13°C / 6°C . Nov: 5°C / 1°C . Dec: 1°C / -2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 43 mm. Feb: 36 mm. Mar: 33 mm. Apr: 50 mm. May: 56 mm. Jun: 67 mm. Jul: 70 mm. Aug: 52 mm. Sep: 34 mm. Oct: 63 mm. Nov: 47 mm. Dec: 55 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 86%. Feb: 81%. Mar: 74%. Apr: 68%. May: 65%. Jun: 64%. Jul: 67%. Aug: 65%. Sep: 65%. Oct: 78%. Nov: 84%. Dec: 88%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 19 km/h . Feb: 19 km/h . Mar: 19 km/h . Apr: 19 km/h . May: 17 km/h . Jun: 17 km/h . Jul: 16 km/h . Aug: 15 km/h . Sep: 17 km/h . Oct: 18 km/h . Nov: 18 km/h . Dec: 19 km/h .
Sunshine
Sunshine
Sunshine: Jan: 2h. Feb: 4h. Mar: 7h. Apr: 9h. May: 11h. Jun: 13h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 5h. Nov: 2h. Dec: 2h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 2. Mar: UV 3. Apr: UV 4. May: UV 5. Jun: UV 6. Jul: UV 6. Aug: UV 6. Sep: UV 4. Oct: UV 2. Nov: UV 1. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 14 days. Feb: 10 days. Mar: 5 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 4 days. Dec: 13 days.
Climate Trends
Average highs have warmed by 0.9°C (1.6°F) across the available records. Average rainfall is trending drier by about 13 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 26°C | Jul · 26°C |
| Coldest month | Feb 2025 · -8°C | Jan · -5°C |
| Wettest month | Jul 2025 · 79 mm | Jul · 70 mm |
| Windiest month | Jun 2025 · 22 km/h | Jan · 19 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May best
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -1°C / -5°C | -5°C / -10°C | 10days (43 mm) Wet | 2.3h Poor | 86% Very Muggy | 1.1 Low | Poor | View Details |
| February | 1°C / -5°C | -3°C / -9°C | 9days (36 mm) Wet | 4.1h Fair | 81% Humid | 2 Low | Poor | View Details |
| March | 7°C / -1°C | 3°C / -5°C | 8days (33 mm) Wet | 6.6h Fair | 74% Muggy | 2.9 Moderate | Poor | View Details |
| April | 14°C / 5°C | 11°C / 1°C | 10days (50 mm) Wet | 9.2h Good | 68% Muggy | 4.3 Moderate | Fair | View Details |
| May best | 19°C / 10°C | 17°C / 7°C | 10days (56 mm) Wet | 11.2h Excellent | 65% Muggy | 5.3 High | Good | View Details |
| June best | 25°C / 16°C | 25°C / 15°C | 11days (67 mm) Wet | 12.6h Excellent | 64% Muggy | 5.8 High | Excellent | View Details |
| July best | 26°C / 17°C | 26°C / 17°C | 10days (70 mm) Wet | 12.1h Excellent | 67% Muggy | 5.8 High | Excellent | View Details |
| August best | 26°C / 16°C | 26°C / 16°C | 7days (52 mm) Good | 11.4h Excellent | 65% Muggy | 5.5 High | Excellent | View Details |
| September best | 20°C / 12°C | 19°C / 10°C | 6days (34 mm) Good | 8.7h Good | 65% Muggy | 4.1 Moderate | Excellent | View Details |
| October | 13°C / 6°C | 10°C / 3°C | 9days (63 mm) Wet | 5.3h Fair | 78% Humid | 2.1 Moderate | Fair | View Details |
| November | 5°C / 1°C | 2°C / -3°C | 9days (47 mm) Wet | 2.3h Poor | 84% Humid | 1.2 Low | Poor | View Details |
| December | 1°C / -2°C | -3°C / -7°C | 12days (55 mm) Wet | 1.5h Poor | 88% Very Muggy | 0.9 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Oster are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Oster, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Oster is July, with average daytime highs of 26°C (78°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Oster is January, with average overnight lows of -5°C (23°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Oster is July, averaging 70mm of precipitation across 10 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Oster runs through December, June, January, April, with the heaviest rainfall in December. Based on 10-year averages for Oster.
Oster receives approximately 87 sunshine hours per year. The sunniest month is June with around 13 hours. Based on climate data for Oster.
The least favorable months to visit Oster are January, February, November, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Oster is 3, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Oster is 74%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Oster receives snow. Months with snowfall average 8 snow days and 12 cm (5 in) of accumulation, with about 15 frost days during winter.
Average wind speeds in Oster are 18 km/h (11 mph). The windiest month is January with peak winds reaching 19 km/h (12 mph) (gusts up to 35 km/h / 22 mph).
Oster averages 3 clear-sky days per month with overall cloud cover around 66%. The clearest skies occur in August.
The annual average dew point in Oster is 5°C (41°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Oster has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Oster ranges from 3°C (37°F) to 11°C (52°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Oster. It earns a climate score of 8.5/10 with Excellent.
For June in Oster, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 25°C (77°F) and 11 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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