Gromnik, Poland experiences average highs of 14°C (57°F) and lows of 6°C (43°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Average highs have stayed broadly stable across the available records.
Gromnik, Poland Weather & Climate 2026
Monthly climate averages for Gromnik, Poland. 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
4.6/10
Best: June, July, August, September
UV Index
3
Low
Temperature 14°C / 6°C
Feels Like 12°C / 4°C
Rainy Days 13
Rainfall 77 mm
Sunshine 8 h
Humidity 77%
Wind Speed 16 km/h
Dew Point 6°C
Snow Days 9 days
Frost Days 12 days
Hottest Month
25°C
August
Avg Low15°C
Rain12days
Coldest Month
-3°C
January
Avg High2°C
Rain13days
Driest Month
11days
October
Avg High14°C
Avg Low7°C
Windiest Month
18 km/h
February (Gusts 39)
Worst Time to Visit
Consider avoiding January, February, November, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 04:29
Daylight 16.3h
Sunset 20:47
Live conditions—
Gromnik on the map · live conditions
Gromnik, Poland
- Continent
- Europe
- Country
- Poland
- City
- Gromnik
- Population
- 3.3K
- Coordinates
- 49.84°, 20.96°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 4°C
Rain 13 days/mo
Summer
Jun–Aug
Avg High 24°C
Avg Low 15°C
Rain 13 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 14°C
Avg Low 7°C
Rain 11 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 4°C
Avg Low -2°C
Rain 13 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: 2°C / -3°C . Feb: 5°C / -2°C . Mar: 9°C / 0°C . Apr: 14°C / 5°C . May: 18°C / 9°C . Jun: 23°C / 14°C . Jul: 24°C / 16°C . Aug: 25°C / 15°C . Sep: 20°C / 12°C . Oct: 14°C / 7°C . Nov: 8°C / 2°C . Dec: 4°C / -1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 61 mm. Feb: 60 mm. Mar: 49 mm. Apr: 70 mm. May: 92 mm. Jun: 78 mm. Jul: 115 mm. Aug: 101 mm. Sep: 94 mm. Oct: 76 mm. Nov: 61 mm. Dec: 64 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 83%. Feb: 79%. Mar: 73%. Apr: 70%. May: 72%. Jun: 72%. Jul: 72%. Aug: 74%. Sep: 77%. Oct: 80%. Nov: 85%. Dec: 86%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 18 km/h . Mar: 17 km/h . Apr: 17 km/h . May: 15 km/h . Jun: 14 km/h . Jul: 14 km/h . Aug: 13 km/h . Sep: 14 km/h . Oct: 17 km/h . Nov: 16 km/h . Dec: 17 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 5h. Mar: 8h. Apr: 9h. May: 11h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 8h. Oct: 6h. Nov: 4h. Dec: 3h.
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
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 14 days. Feb: 11 days. Mar: 6 days. Apr: 4 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 6 days. Dec: 12 days.
Climate Trends
Average highs have stayed broadly stable 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 · 24°C | Aug · 25°C |
| Coldest month | Feb 2025 · -3°C | Jan · -3°C |
| Wettest month | Jul 2025 · 144 mm | Jul · 115 mm |
| Windiest month | Jan 2025 · 19 km/h | Feb · 18 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Good October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 2°C / -3°C | -2°C / -8°C | 13days (61 mm) Wet | 4h Fair | 83% Humid | 1.2 Low | Poor | View Details |
| February | 5°C / -2°C | 1°C / -6°C | 12days (60 mm) Wet | 5.2h Fair | 79% Humid | 1.8 Low | Poor | View Details |
| March | 9°C / 0°C | 5°C / -4°C | 12days (49 mm) Wet | 7.5h Good | 73% Muggy | 3.2 Moderate | Poor | View Details |
| April | 14°C / 5°C | 11°C / 1°C | 12days (70 mm) Wet | 9.1h Good | 70% Muggy | 4.4 Moderate | Fair | View Details |
| May | 18°C / 9°C | 17°C / 7°C | 15days (92 mm) Wet | 10.5h Excellent | 72% Muggy | 5.4 High | Good | View Details |
| June best | 23°C / 14°C | 24°C / 14°C | 13days (78 mm) Wet | 12h Excellent | 72% Muggy | 6 High | Excellent | View Details |
| July best | 24°C / 16°C | 25°C / 15°C | 15days (115 mm) Wet | 11.5h Excellent | 72% Muggy | 5.8 High | Excellent | View Details |
| August best | 25°C / 15°C | 25°C / 15°C | 12days (101 mm) Wet | 10.6h Excellent | 74% Muggy | 5.3 High | Excellent | View Details |
| September best | 20°C / 12°C | 19°C / 10°C | 12days (94 mm) Wet | 8.1h Good | 77% Humid | 3.9 Moderate | Good | View Details |
| October | 14°C / 7°C | 12°C / 4°C | 11days (76 mm) Wet | 6.4h Fair | 80% Humid | 2.4 Moderate | Fair | View Details |
| November | 8°C / 2°C | 5°C / -1°C | 11days (61 mm) Wet | 4.3h Fair | 85% Humid | 1.3 Low | Poor | View Details |
| December | 4°C / -1°C | 0°C / -5°C | 14days (64 mm) Wet | 3.2h Poor | 86% Very Muggy | 1 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Gromnik are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Gromnik, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Gromnik is August, with average daytime highs of 25°C (76°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Gromnik is January, with average overnight lows of -3°C (26°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Gromnik is July, averaging 115mm of precipitation across 15 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Gromnik runs through May, July, December, January, with the heaviest rainfall in May. Based on 10-year averages for Gromnik.
Gromnik receives approximately 92 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Gromnik.
The least favorable months to visit Gromnik are January, February, November, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Gromnik is 3, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Gromnik is 77%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Gromnik receives snow. Months with snowfall average 9 snow days and 15 cm (6 in) of accumulation, with about 12 frost days during winter.
Average wind speeds in Gromnik are 16 km/h (10 mph). The windiest month is February with peak winds reaching 18 km/h (11 mph) (gusts up to 39 km/h / 24 mph).
Gromnik averages 2 clear-sky days per month with overall cloud cover around 65%. The clearest skies occur in April.
The annual average dew point in Gromnik is 6°C (43°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Gromnik 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 Gromnik ranges from 4°C (39°F) to 12°C (54°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Gromnik. It earns a climate score of 8.5/10 with Excellent.
For June in Gromnik, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 23°C (74°F) and 13 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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