Pentéli, Greece experiences average highs of 21°C (70°F) and lows of 11°C (52°F) throughout the year. The climate is relatively dry, with only 5 rainy days per month on average. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Pentéli, Greece Weather & Climate 2026
Monthly climate averages for Pentéli, Greece. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.8/10
Best: June, July, August, September, October
UV Index
6
High
Temperature 21°C / 11°C
Feels Like 19°C / 10°C
Rainy Days 5
Rainfall 30 mm
Sunshine 10 h
Humidity 66%
Wind Speed 16 km/h
Dew Point 9°C
Snow Days 1 days
Frost Days 3 days
Hottest Month
32°C
July
Avg Low 21°C
Rain 2 days
Coldest Month
3°C
January
Avg High 11°C
Rain 8 days
Driest Month
2 days
July
Avg High 32°C
Avg Low 21°C
Windiest Month
18 km/h
August (Gusts 46)
Sea Temperature
15°C – 26°C
Warmest water: August (
26.3°C
)
Worst Time to Visit
Consider avoiding January, February, March, December due to less favorable weather conditions.
Sun Position
Sunrise 06:14
Daylight 14.6h
Sunset 20:47
Live conditions —
Pentéli on the map · live conditions
Pentéli, Greece
- Continent
- Europe
- Country
- Greece
- City
- Pentéli
- Population
- 4.9K
- Coordinates
- 38.05°, 23.87°
Seasonal Breakdown
Spring
Mar–May
Avg High 20°C
Avg Low 9°C
Rain 5 days/mo
Summer
Jun–Aug
Avg High 31°C
Avg Low 20°C
Rain 3 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 22°C
Avg Low 13°C
Rain 4 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 12°C
Avg Low 4°C
Rain 8 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: 11°C / 3°C . Feb: 12°C / 4°C . Mar: 15°C / 5°C . Apr: 20°C / 9°C . May: 24°C / 13°C . Jun: 29°C / 18°C . Jul: 32°C / 21°C . Aug: 31°C / 21°C . Sep: 27°C / 17°C . Oct: 22°C / 13°C . Nov: 17°C / 9°C . Dec: 12°C / 5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 50 mm. Feb: 38 mm. Mar: 39 mm. Apr: 31 mm. May: 23 mm. Jun: 22 mm. Jul: 8 mm. Aug: 11 mm. Sep: 16 mm. Oct: 22 mm. Nov: 43 mm. Dec: 53 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 79%. Feb: 77%. Mar: 71%. Apr: 64%. May: 58%. Jun: 53%. Jul: 47%. Aug: 51%. Sep: 60%. Oct: 71%. Nov: 78%. Dec: 81%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 16 km/h . Mar: 16 km/h . Apr: 15 km/h . May: 15 km/h . Jun: 15 km/h . Jul: 17 km/h . Aug: 18 km/h . Sep: 16 km/h . Oct: 15 km/h . Nov: 15 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 8h. Mar: 10h. Apr: 11h. May: 12h. Jun: 13h. Jul: 13h. Aug: 13h. Sep: 11h. Oct: 9h. Nov: 8h. Dec: 7h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 16°C . Feb: 15°C . Mar: 15°C . Apr: 17°C . May: 18°C . Jun: 22°C . Jul: 26°C . Aug: 26°C . Sep: 25°C . Oct: 23°C . Nov: 20°C . Dec: 18°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 7. Oct: UV 5. Nov: UV 4. Dec: UV 3.
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: 1 days. Feb: 1 days. Mar: 0 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 0 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 10 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 34°C | Jul · 32°C |
| Coldest month | Feb 2025 · 3°C | Jan · 3°C |
| Wettest month | Dec 2025 · 65 mm | Dec · 53 mm |
| Windiest month | Aug 2025 · 19 km/h | Aug · 18 km/h |
Month-by-Month Weather Table
January
Poor 
February
Fair March
Fair April
Good May
Excellent June best
Excellent July best
Excellent August best
Excellent September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 11°C / 3°C | 7°C / 0°C | 8days (50 mm) Wet | 7.3h Good | 79% Humid | 2.9 Moderate | Poor | View Details |
| February | 12°C / 4°C | 9°C / 1°C | 7days (38 mm) Good | 8.1h Good | 77% Humid | 3.7 Moderate | Fair | View Details |
| March | 15°C / 5°C | 13°C / 3°C | 6days (39 mm) Good | 9.8h Good | 71% Muggy | 5.7 High | Fair | View Details |
| April | 20°C / 9°C | 18°C / 7°C | 5days (31 mm) Good | 11.2h Excellent | 64% Muggy | 6.9 High | Good | View Details |
| May | 24°C / 13°C | 24°C / 12°C | 5days (23 mm) Good | 12.3h Excellent | 58% Moderate | 7.6 Very High | Excellent | View Details |
| June best | 29°C / 18°C | 30°C / 18°C | 4days (22 mm) Good | 13.1h Excellent | 53% Moderate | 8.2 Very High | Excellent | View Details |
| July best | 32°C / 21°C | 32°C / 21°C | 2days (8 mm) Excellent | 13.1h Excellent | 47% Moderate | 8.4 Very High | Excellent | View Details |
| August best | 31°C / 21°C | 31°C / 21°C | 2days (11 mm) Excellent | 12.5h Excellent | 51% Moderate | 7.8 Very High | Excellent | View Details |
| September best | 27°C / 17°C | 26°C / 17°C | 2days (16 mm) Excellent | 10.9h Excellent | 60% Moderate | 6.6 High | Excellent | View Details |
| October best | 22°C / 13°C | 20°C / 12°C | 3days (22 mm) Excellent | 9.4h Good | 71% Muggy | 5 Moderate | Excellent | View Details |
| November | 17°C / 9°C | 15°C / 8°C | 6days (43 mm) Good | 7.7h Good | 78% Humid | 3.5 Moderate | Good | View Details |
| December | 12°C / 5°C | 10°C / 3°C | 8days (53 mm) Wet | 7h Good | 81% Humid | 2.6 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Pentéli are June, July, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Pentéli, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Pentéli is July, with average daytime highs of 32°C (89°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Pentéli is January, with average overnight lows of 3°C (37°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Pentéli is December, averaging 53mm of precipitation across 8 rainy days. An umbrella or waterproof jacket is essential.
Pentéli receives approximately 122 sunshine hours per year. The sunniest month is June with around 13 hours. Based on climate data for Pentéli.
The least favorable months to visit Pentéli are January, February, March, December, primarily due to less favorable weather conditions. For the best conditions, consider June, July, August, September, October instead.
The annual average UV index in Pentéli is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Pentéli is 66%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in June, July, August, September, October average 24°C (75°F), which is warm and comfortable for swimming and water activities.
Yes, Pentéli receives snow. Months with snowfall average 1 snow days and 1 cm (0 in) of accumulation, with about 3 frost days during winter.
Average wind speeds in Pentéli are 16 km/h (10 mph). The windiest month is August with peak winds reaching 18 km/h (11 mph) (gusts up to 46 km/h / 29 mph).
Pentéli averages 12 clear-sky days per month with overall cloud cover around 36%. The clearest skies occur in July.
The annual average dew point in Pentéli is 9°C (48°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Pentéli has a Cold Semi-Arid climate, classified as BSk under the Köppen system. Arid climates have very low rainfall relative to temperature, with large swings between daytime heat and cool nights.
The 'feels like' temperature in Pentéli ranges from 10°C (50°F) to 19°C (66°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, July is a great time to visit Pentéli. It earns a climate score of 9.2/10 with Excellent.
For July in Pentéli, pack Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. With average highs of 32°C (89°F) and 2 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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