Ostrowsko, Poland experiences average highs of 12°C (54°F) and lows of 4°C (39°F) throughout the year. Rainfall is frequent, averaging about 15 rainy days per month. Average highs have warmed by 0.7°C (1.3°F) across the available records.
Ostrowsko, Poland Weather & Climate 2026
Monthly climate averages for Ostrowsko, Poland. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Apr–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.2/10
Best: May, June, July, August, September
UV Index
3
Low
Temperature 12°C / 4°C
Feels Like 11°C / 2°C
Rainy Days 15
Rainfall 99 mm
Sunshine 8 h
Humidity 80%
Wind Speed 12 km/h
Dew Point 5°C
Snow Days 10 days
Frost Days 17 days
Hottest Month
23°C
August
Avg Low 14°C
Rain 16 days
Coldest Month
-5°C
January
Avg High 1°C
Rain 13 days
Driest Month
12 days
November
Avg High 7°C
Avg Low 0°C
Windiest Month
14 km/h
February (Gusts 39)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 04:49
Daylight 15.9h
Sunset 20:41
Live conditions —
Ostrowsko on the map · live conditions
Ostrowsko, Poland
- Continent
- Europe
- Country
- Poland
- City
- Ostrowsko
- Population
- 1.3K
- Coordinates
- 49.48°, 20.10°
Seasonal Breakdown
Spring
Mar–May
Avg High 12°C
Avg Low 3°C
Rain 15 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 22°C
Avg Low 13°C
Rain 17 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 13°C
Avg Low 5°C
Rain 13 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 2°C
Avg Low -4°C
Rain 13 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 1°C / -5°C . Feb: 4°C / -3°C . Mar: 7°C / -1°C . Apr: 12°C / 3°C . May: 16°C / 7°C . Jun: 22°C / 13°C . Jul: 22°C / 14°C . Aug: 23°C / 14°C . Sep: 18°C / 10°C . Oct: 13°C / 5°C . Nov: 7°C / 0°C . Dec: 2°C / -3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 70 mm. Feb: 73 mm. Mar: 59 mm. Apr: 92 mm. May: 127 mm. Jun: 115 mm. Jul: 155 mm. Aug: 140 mm. Sep: 121 mm. Oct: 92 mm. Nov: 66 mm. Dec: 74 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 84%. Feb: 82%. Mar: 76%. Apr: 74%. May: 76%. Jun: 76%. Jul: 77%. Aug: 78%. Sep: 81%. Oct: 84%. Nov: 88%. Dec: 87%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 14 km/h . Mar: 14 km/h . Apr: 14 km/h . May: 13 km/h . Jun: 12 km/h . Jul: 12 km/h . Aug: 11 km/h . Sep: 12 km/h . Oct: 13 km/h . Nov: 11 km/h . Dec: 13 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 6h. Mar: 8h. Apr: 9h. May: 10h. Jun: 11h. Jul: 11h. Aug: 10h. Sep: 8h. Oct: 6h. Nov: 5h. Dec: 4h.
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 5. Sep: UV 4. Oct: UV 2. Nov: UV 1. Dec: UV 1.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow Days Snowfall
Snow Days: Jan: 18 days. Feb: 15 days. Mar: 11 days. Apr: 7 days. May: 1 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 3 days. Nov: 9 days. Dec: 15 days.
Climate Trends
Average highs have warmed by 0.7°C (1.3°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 22°C | Aug · 23°C |
| Coldest month | Feb 2025 · -4°C | Jan · -5°C |
| Wettest month | Jul 2025 · 218 mm | Jul · 155 mm |
| Windiest month | Oct 2025 · 15 km/h | Feb · 14 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May best
Wet June best
Good July best
Wet August best
Excellent September best
Good October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 1°C / -5°C | -3°C / -10°C | 13days (70 mm) Wet | 4h Fair | 84% Humid | 1.2 Low | Poor | View Details |
| February | 4°C / -3°C | 0°C / -7°C | 14days (73 mm) Wet | 5.5h Fair | 82% Humid | 1.9 Low | Poor | View Details |
| March | 7°C / -1°C | 4°C / -5°C | 13days (59 mm) Wet | 7.6h Good | 76% Humid | 3.3 Moderate | Poor | View Details |
| April | 12°C / 3°C | 10°C / 0°C | 15days (92 mm) Wet | 8.7h Good | 74% Muggy | 4.4 Moderate | Poor | View Details |
| May best | 16°C / 7°C | 15°C / 5°C | 18days (127 mm) Wet | 9.9h Good | 76% Humid | 5.3 High | Wet | View Details |
| June best | 22°C / 13°C | 22°C / 12°C | 16days (115 mm) Wet | 11.4h Excellent | 76% Humid | 6 High | Good | View Details |
| July best | 22°C / 14°C | 23°C / 14°C | 19days (155 mm) Wet | 11h Excellent | 77% Humid | 5.8 High | Wet | View Details |
| August best | 23°C / 14°C | 24°C / 14°C | 16days (140 mm) Wet | 10.1h Excellent | 78% Humid | 5.4 High | Excellent | View Details |
| September best | 18°C / 10°C | 18°C / 9°C | 14days (121 mm) Wet | 7.8h Good | 81% Humid | 3.9 Moderate | Good | View Details |
| October | 13°C / 5°C | 11°C / 2°C | 13days (92 mm) Wet | 6.1h Fair | 84% Humid | 2.3 Moderate | Fair | View Details |
| November | 7°C / 0°C | 4°C / -3°C | 12days (66 mm) Wet | 4.5h Fair | 88% Very Muggy | 1.4 Low | Poor | View Details |
| December | 2°C / -3°C | -1°C / -7°C | 13days (74 mm) Wet | 3.5h Poor | 87% Very Muggy | 1 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Ostrowsko 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 Ostrowsko, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Ostrowsko is August, with average daytime highs of 23°C (73°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Ostrowsko is January, with average overnight lows of -5°C (22°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Ostrowsko is July, averaging 155mm of precipitation across 19 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Ostrowsko runs through July, May, June, August, with the heaviest rainfall in July. Based on 10-year averages for Ostrowsko.
Ostrowsko receives approximately 90 sunshine hours per year. The sunniest month is June with around 11 hours. Based on climate data for Ostrowsko.
The least favorable months to visit Ostrowsko are January, February, March, 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 Ostrowsko is 3, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Ostrowsko is 80%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Ostrowsko receives snow. Months with snowfall average 10 snow days and 22 cm (9 in) of accumulation, with about 17 frost days during winter.
Average wind speeds in Ostrowsko are 12 km/h (7 mph). The windiest month is February with peak winds reaching 14 km/h (9 mph) (gusts up to 39 km/h / 24 mph).
Ostrowsko averages 2 clear-sky days per month with overall cloud cover around 68%. The clearest skies occur in March.
The annual average dew point in Ostrowsko is 5°C (41°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Ostrowsko 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 Ostrowsko ranges from 2°C (36°F) to 11°C (52°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
July is not the best time to visit Ostrowsko, with a climate score of 7.4/10. Consider visiting during May, June, July, August, September instead for better conditions.
For July in Ostrowsko, pack Umbrella, Waterproof jacket, Waterproof shoes, Sunscreen (SPF 30+), Sunglasses. With average highs of 22°C (72°F) and 19 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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