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Weather & Climate in Ierissós, Greece
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ierissós enjoys a temperate climate with an average annual temperature of 60°F (15°C). Winters average 44°F in January while summers reach 78°F in July. The area gets 302 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 18.5 inches (drier than the 38-inch national average). The city sits at an elevation of 20 feet.
Temperature
44°F Jan (6°C)
78°F Jul (25°C)
| Annual Average | 59.7°F |
| 11% above US avg | |
| January Average | 44°F (6°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 302 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 460.7 sq mi (1,193.2 km²) |
| Population Density | 7/sq mi |
| Coordinates | 40.3975°N, 23.8751°W |
| Timezone | Europe/Athens |
Precipitation & Snow
Air Quality
Earthquake History
1,941 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.9.
| May 24, 2014 | 21 km SSW of Kamariótissa, Greece | M6.9 | 129 km | 6 km |
| Dec 21, 1990 | 14 km WNW of Gouménissa, Greece | M6.1 | 149 km | 13 km |
| Jan 16, 2022 | 25 km SSE of Karyes, Greece | M5.5 | 57 km | 7 km |
| Jul 23, 1992 | 43 km ESE of Sykiá, Greece | M5.5 | 75 km | 7 km |
| Jun 7, 2025 | 6 km WNW of Karyes, Greece | M5.4 | 28 km | 10 km |
| May 24, 2009 | 11 km WNW of Stathmós Mourión, Greece | M5.3 | 140 km | 0 km |
| May 4, 1995 | 9 km NNW of Palaiochóri, Greece | M5.3 | 29 km | 10 km |
| Jun 9, 2003 | 7 km E of Tsarítsani, Greece | M5.2 | 144 km | 18 km |
| Mar 4, 2012 | 8 km ENE of Sárti, Greece | M5.2 | 33 km | 3 km |
| Feb 14, 2012 | 10 km ENE of Sárti, Greece | M5.2 | 35 km | 24 km |
| Aug 22, 2014 | 12 km S of Kassándreia, Greece | M5.2 | 64 km | 14 km |
| Oct 11, 2017 | 32 km E of Patitírion, Greece | M5.1 | 141 km | 12 km |
| Jul 16, 2010 | 24 km NNE of Patitírion, Greece | M5.0 | 118 km | 9 km |
| Jul 30, 2001 | 16 km ESE of Patitírion, Greece | M5.0 | 146 km | 10 km |
| Mar 3, 2021 | Greece | M4.9 | 146 km | 10 km |
| Feb 7, 2023 | 4 km SSW of Níkiti, Greece | M4.9 | 31 km | 10 km |
| Sep 4, 2014 | 29 km NNW of Mýrina, Greece | M4.9 | 91 km | 12 km |
| Feb 15, 2025 | 12 km E of Ouranoupolis, Greece | M4.9 | 23 km | 14 km |
| Jan 2, 2018 | 2 km N of Stathmós Mourión, Greece | M4.9 | 132 km | 12 km |
| Apr 21, 2018 | 3 km ESE of Pefkochóri, Greece | M4.9 | 51 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
9 tsunamis recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1905 | NORTH AEGEAN SEA | Eruption + Earthquake | 3.0 m | 11 | 72 km |
| 1932 | NORTH AEGEAN | Earthquake | 2.0 m | 161 | 12 km |
| 1968 | LEMNOS ISLAND, NORTH AEGEAN SEA | Earthquake | 1.2 m | 22 | 147 km |
| 1893 | SAMOTHRACE | Earthquake | 1.0 m | 1 | 138 km |
| 2014 | NORTH AEGEAN SEA | Earthquake | 0.2 m | 3 | 129 km |
| 1965 | AEGEAN SEA | Earthquake | — | 38 | 111 km |
| 1955 | VOLOS GULF | Earthquake | — | 8 | 129 km |
| 1902 | AEGEAN SEA | Earthquake | — | 5 | 66 km |
| 1585 | NORTH AEGEAN SEA | Earthquake | — | — | 57 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 44°F (6°C) | 2.2 in | Coldest |
| February | 45°F (7°C) | 1.6 in | |
| March | 49°F (10°C) | 1.7 in | |
| April | 56°F (14°C) | 1.3 in | |
| May | 65°F (18°C) | 1.3 in | |
| June | 73°F (23°C) | 1.2 in | |
| July | 78°F (25°C) | 0.8 in | Warmest |
| August | 77°F (25°C) | 0.6 in | Driest |
| September | 70°F (21°C) | 0.8 in | |
| October | 61°F (16°C) | 2.0 in | |
| November | 52°F (11°C) | 2.6 in | Wettest |
| December | 46°F (8°C) | 2.5 in |
Ierissós has a seasonal temperature swing of 34°F / from 44°F in January to 78°F in July. Total annual precipitation is 18.5 inches, with November being the wettest month (2.6") and August the driest (0.6").