Óssa, Greece experiences average highs of 21°C (70°F) and lows of 13°C (55°F) throughout the year. The climate is relatively dry, with only 7 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.
Óssa, Greece Weather & Climate 2026
Monthly climate averages for Óssa, 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
7.4/10
Best: May, June, August, September, October
UV Index
5
Low
Temperature 21°C / 13°C
Feels Like 21°C / 12°C
Rainy Days 7
Rainfall 63 mm
Sunshine 10 h
Humidity 68%
Wind Speed 11 km/h
Dew Point 11°C
Snow Days 2 days
Frost Days 2 days
Hottest Month
31°C
July
Avg Low 22°C
Rain 3 days
Coldest Month
4°C
January
Avg High 10°C
Rain 10 days
Driest Month
3 days
July
Avg High 31°C
Avg Low 22°C
Windiest Month
12 km/h
March (Gusts 34)
Worst Time to Visit
Consider avoiding January, February, December due to less favorable weather conditions.
Sun Position
Sunrise 06:14
Daylight 14.7h
Sunset 20:57
Live conditions —
Óssa on the map · live conditions
Óssa, Greece
- Continent
- Europe
- Country
- Greece
- City
- Óssa
- Population
- 651
- Coordinates
- 39.75°, 22.58°
Seasonal Breakdown
Spring
Mar–May
Avg High 19°C
Avg Low 10°C
Rain 9 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 30°C
Avg Low 21°C
Rain 4 days/mo
2/3 best months
Autumn
Sep–Nov
Avg High 21°C
Avg Low 14°C
Rain 7 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 12°C
Avg Low 5°C
Rain 10 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: 10°C / 4°C . Feb: 13°C / 5°C . Mar: 15°C / 7°C . Apr: 19°C / 10°C . May: 23°C / 14°C . Jun: 29°C / 20°C . Jul: 31°C / 22°C . Aug: 31°C / 22°C . Sep: 26°C / 19°C . Oct: 21°C / 14°C . Nov: 16°C / 10°C . Dec: 12°C / 6°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 83 mm. Feb: 70 mm. Mar: 76 mm. Apr: 54 mm. May: 52 mm. Jun: 45 mm. Jul: 41 mm. Aug: 27 mm. Sep: 71 mm. Oct: 55 mm. Nov: 82 mm. Dec: 98 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 76%. Mar: 72%. Apr: 68%. May: 65%. Jun: 60%. Jul: 55%. Aug: 56%. Sep: 63%. Oct: 72%. Nov: 78%. Dec: 78%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 10 km/h . Feb: 11 km/h . Mar: 12 km/h . Apr: 12 km/h . May: 12 km/h . Jun: 11 km/h . Jul: 11 km/h . Aug: 11 km/h . Sep: 11 km/h . Oct: 10 km/h . Nov: 10 km/h . Dec: 10 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 7h. Mar: 9h. Apr: 11h. May: 12h. Jun: 13h. Jul: 13h. Aug: 12h. Sep: 10h. Oct: 8h. Nov: 6h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 3. Mar: UV 5. Apr: UV 7. May: UV 7. Jun: UV 8. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
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: 3 days. Feb: 1 days. Mar: 1 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: 1 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 18 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 33°C | Jul · 31°C |
| Coldest month | Feb 2025 · 5°C | Jan · 4°C |
| Wettest month | Dec 2025 · 210 mm | Dec · 98 mm |
| Windiest month | Aug 2025 · 12 km/h | Mar · 12 km/h |
Month-by-Month Weather Table
January
Poor 
February
Fair March
Fair April
Good May best
Excellent June best
Excellent July
Good August best
Excellent September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 10°C / 4°C | 8°C / 1°C | 10days (83 mm) Wet | 6.6h Fair | 76% Humid | 2.7 Moderate | Poor | View Details |
| February | 13°C / 5°C | 10°C / 3°C | 9days (70 mm) Wet | 7.3h Good | 76% Humid | 3.4 Moderate | Fair | View Details |
| March | 15°C / 7°C | 14°C / 5°C | 10days (76 mm) Wet | 9h Good | 72% Muggy | 5.2 High | Fair | View Details |
| April | 19°C / 10°C | 19°C / 9°C | 8days (54 mm) Wet | 10.6h Excellent | 68% Muggy | 6.5 High | Good | View Details |
| May best | 23°C / 14°C | 24°C / 14°C | 8days (52 mm) Wet | 11.6h Excellent | 65% Muggy | 7.3 Very High | Excellent | View Details |
| June best | 29°C / 20°C | 31°C / 21°C | 6days (45 mm) Good | 12.8h Excellent | 60% Moderate | 8 Very High | Excellent | View Details |
| July | 31°C / 22°C | 34°C / 24°C | 3days (41 mm) Excellent | 13h Excellent | 55% Moderate | 8.1 Very High | Good | View Details |
| August best | 31°C / 22°C | 33°C / 24°C | 4days (27 mm) Good | 12.4h Excellent | 56% Moderate | 7.4 Very High | Excellent | View Details |
| September best | 26°C / 19°C | 27°C / 20°C | 6days (71 mm) Good | 10.2h Excellent | 63% Muggy | 5.9 High | Excellent | View Details |
| October best | 21°C / 14°C | 21°C / 14°C | 6days (55 mm) Good | 8.4h Good | 72% Muggy | 4.4 Moderate | Excellent | View Details |
| November | 16°C / 10°C | 15°C / 9°C | 9days (82 mm) Wet | 6.4h Fair | 78% Humid | 2.9 Moderate | Good | View Details |
| December | 12°C / 6°C | 10°C / 4°C | 10days (98 mm) Wet | 6.1h Fair | 78% Humid | 2.2 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Óssa are May, June, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Óssa, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Óssa is July, with average daytime highs of 31°C (88°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Óssa is January, with average overnight lows of 4°C (38°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Óssa is December, averaging 98mm of precipitation across 10 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Óssa runs through January, March, December, with the heaviest rainfall in January. Based on 10-year averages for Óssa.
Óssa receives approximately 114 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Óssa.
The least favorable months to visit Óssa are January, February, December, primarily due to less favorable weather conditions. For the best conditions, consider May, June, August, September, October instead.
The annual average UV index in Óssa is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Óssa is 68%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Óssa receives snow. Months with snowfall average 2 snow days and 4 cm (2 in) of accumulation, with about 2 frost days during winter.
Average wind speeds in Óssa are 11 km/h (7 mph). The windiest month is March with peak winds reaching 12 km/h (7 mph) (gusts up to 34 km/h / 21 mph).
Óssa averages 9 clear-sky days per month with overall cloud cover around 43%. The clearest skies occur in July.
The annual average dew point in Óssa is 11°C (52°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Óssa has a Hot-Summer Mediterranean climate, classified as Csa 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 Óssa ranges from 12°C (54°F) to 21°C (70°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 Óssa. It earns a climate score of 8.3/10 with Good.
For July in Óssa, pack Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. With average highs of 31°C (88°F) and 3 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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