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Weather & Climate in Ístro, Greece
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ístro enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 53°F in January while summers reach 79°F in July. The area gets 295 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 22.6 inches (drier than the 38-inch national average). The city sits at an elevation of 62 feet.
Temperature
53°F Jan (11°C)
79°F Jul (26°C)
| Annual Average | 64.4°F |
| 19% above US avg | |
| January Average | 53°F (11°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 295 days/yr |
Geography
| Elevation | 62 ft (19 m) |
| Area | 197.7 sq mi (512.0 km²) |
| Population Density | 3/sq mi |
| Coordinates | 35.1247°N, 25.7388°W |
| Timezone | Europe/Athens |
Precipitation & Snow
Air Quality
Earthquake History
2,975 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.5.
| May 2, 2020 | 91 km S of Néa Anatolí, Greece | M6.5 | 105 km | 10 km |
| Jul 1, 2009 | 95 km S of Néa Anatolí, Greece | M6.4 | 110 km | 19 km |
| May 22, 2025 | 66 km SE of Emporeío, Greece | M6.2 | 87 km | 64 km |
| Jan 22, 2002 | 49 km NW of Fry, Greece | M6.2 | 109 km | 88 km |
| Jun 15, 2013 | 68 km S of Pýrgos, Greece | M6.2 | 104 km | 10 km |
| May 23, 1994 | 15 km NNE of Pánormos, Greece | M6.1 | 104 km | 76 km |
| Apr 1, 2011 | 42 km NW of Fry, Greece | M6.0 | 95 km | 60 km |
| Apr 16, 2015 | 26 km SSW of Fry, Greece | M6.0 | 99 km | 20 km |
| May 13, 2025 | 20 km SSE of Fry, Greece | M6.0 | 115 km | 76 km |
| Jun 16, 2013 | 73 km S of Pýrgos, Greece | M6.0 | 101 km | 19 km |
| Apr 30, 1992 | 39 km ESE of Palekastro, Greece | M5.8 | 84 km | 20 km |
| May 18, 2020 | 92 km S of Néa Anatolí, Greece | M5.7 | 106 km | 10 km |
| Feb 28, 2011 | 22 km W of Néa Anatolí, Greece | M5.7 | 33 km | 53 km |
| Mar 28, 2008 | 32 km SSE of Pýrgos, Greece | M5.6 | 54 km | 45 km |
| Mar 19, 1991 | 42 km S of Palekastro, Greece | M5.6 | 64 km | 23 km |
| Feb 11, 2010 | 113 km S of Pýrgos, Greece | M5.5 | 129 km | 14 km |
| Apr 5, 2000 | 87 km S of Néa Anatolí, Greece | M5.5 | 101 km | 38 km |
| Jun 3, 2020 | 76 km S of Ierápetra, Greece | M5.4 | 89 km | 10 km |
| Jul 9, 1990 | 38 km ESE of Palekastro, Greece | M5.4 | 82 km | 60 km |
| Jun 9, 2015 | 43 km SSW of Fry, Greece | M5.4 | 96 km | 16 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
14 tsunamis recorded within 500 km. Highest wave on record: 90.0 m (295 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| -1610 | THERA ISLAND (SANTORINI) | Astronomical | 90.0 m | — | 145 km |
| 1650 | THERA ISLAND (SANTORINI) | Explosion | 30.0 m | 120 | 146 km |
| 1948 | DODECANESE, KARPATHOS IS. | Earthquake | 7.3 m | — | 141 km |
| 2020 | CRETE | Earthquake | 1.0 m | — | 105 km |
| 2000 | CRETE | Eruption + Earthquake | 0.5 m | — | 101 km |
| 2009 | CRETE | Earthquake | 0.3 m | — | 110 km |
| 2025 | ISLAND OF CRETE | Earthquake | 0.1 m | — | 77 km |
| 2013 | CRETE | Earthquake | 0.0 m | — | 104 km |
| 1870 | ALEXANDRIA | Earthquake | — | — | 100 km |
| 1629 | CRETE | Earthquake | — | — | 118 km |
| 1494 | ISLAND OF CRETE | Earthquake | — | — | 47 km |
| 1303 | AEGEAN SEA | Earthquake | — | 4,000 | 116 km |
| 1050 | ISLAND OF THIRA | Astronomical | — | — | 146 km |
| 46 | THERA ISLAND (SANTORINI) | Astronomical | — | — | 146 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km. Closest: Santorini (146 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Santorini | Shield(s) | 367 m (1,204 ft) | 1950 | 146 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 53°F (11°C) | 4.7 in | Wettest |
| February | 52°F (11°C) | 3.5 in | Coldest |
| March | 54°F (12°C) | 2.6 in | |
| April | 59°F (15°C) | 1.2 in | |
| May | 66°F (19°C) | 0.6 in | |
| June | 74°F (23°C) | 0.2 in | |
| July | 79°F (26°C) | 0.0 in | Warmest, Driest |
| August | 79°F (26°C) | 0.0 in | |
| September | 74°F (23°C) | 0.7 in | |
| October | 67°F (20°C) | 2.0 in | |
| November | 61°F (16°C) | 2.7 in | |
| December | 55°F (13°C) | 4.3 in |
Ístro has a seasonal temperature swing of 27°F / from 52°F in February to 79°F in July. Total annual precipitation is 22.6 inches, with January being the wettest month (4.7") and July the driest (0.0").