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Weather & Climate in Mersa, Ethiopia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mersa enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 60°F in January while summers reach 66°F in July / relatively mild seasonal variation. The area gets 270 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 36.3 inches. The city sits at an elevation of 5,646 feet.
Temperature
60°F Jan (15°C)
66°F Jul (19°C)
| Annual Average | 62.9°F |
| 16% above US avg | |
| January Average | 60°F (15°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 270 days/yr |
Geography
| Elevation | 5,646 ft (1,721 m) |
| Area | 4,710.8 sq mi (12,201.0 km²) |
| Population Density | 8/sq mi |
| Coordinates | 11.6667°N, 39.6500°W |
| Timezone | Africa/Addis_Ababa |
Precipitation & Snow
Air Quality
Earthquake History
17 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.7.
| Sep 21, 1993 | 38 km N of Des?, Ethiopia | M5.7 | 21 km | 15 km |
| May 4, 1990 | 6 km SW of Semera, Ethiopia | M5.0 | 143 km | 10 km |
| Jan 21, 1993 | 101 km NNW of Semera, Ethiopia | M4.9 | 149 km | 10 km |
| Oct 21, 1996 | 99 km E of Maych’ew, Ethiopia | M4.8 | 139 km | 33 km |
| Oct 16, 1996 | 108 km E of Maych’ew, Ethiopia | M4.8 | 150 km | 10 km |
| Jan 18, 2004 | 23 km WSW of Kemis?, Ethiopia | M4.6 | 112 km | 10 km |
| Jun 17, 2006 | 70 km NNW of Semera, Ethiopia | M4.6 | 149 km | 10 km |
| Jan 20, 2020 | 16 km S of Kemis?, Ethiopia | M4.5 | 125 km | 10 km |
| Jun 17, 2006 | 76 km NW of Semera, Ethiopia | M4.5 | 121 km | 10 km |
| Jul 6, 2024 | 38 km S of Robīt, Ethiopia | M4.4 | 3 km | 10 km |
| Jun 17, 2006 | 72 km NW of Semera, Ethiopia | M4.4 | 113 km | 10 km |
| Jan 25, 2023 | 94 km NW of Semera, Ethiopia | M4.3 | 133 km | 10 km |
| Jun 17, 2006 | 71 km NW of Semera, Ethiopia | M4.3 | 115 km | 10 km |
| Jun 20, 2014 | 56 km WNW of Were ?lu, Ethiopia | M4.2 | 133 km | 10 km |
| Dec 5, 2001 | 107 km E of Maych’ew, Ethiopia | M4.0 | 147 km | 10 km |
| Jun 17, 2006 | 68 km NW of Semera, Ethiopia | M3.9 | 126 km | 10 km |
| Jul 14, 1997 | 22 km ESE of Lal?bela, Ethiopia | M3.8 | 55 km | 10 km |
| Jul 11, 2005 | 71 km ENE of Rob?t, Ethiopia | M3.7 | 90 km | 28 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Dabbayra (92 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Dabbayra | Shield | 1,302 m (4,272 ft) | Unknown | 92 km |
| Dabbahu | Stratovolcano | 1,401 m (4,596 ft) | 2005 | 137 km |
| Manda Hararo | Shield(s) | 600 m (1,969 ft) | 2009 | 139 km |
| Alayta | Shield | 1,496 m (4,908 ft) | 1915 | 169 km |
| Gabillema | Stratovolcano | 1,459 m (4,787 ft) | Unknown | 188 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 60°F (15°C) | 1.0 in | |
| February | 61°F (16°C) | 1.3 in | |
| March | 62°F (16°C) | 2.6 in | |
| April | 64°F (18°C) | 3.0 in | |
| May | 65°F (19°C) | 2.7 in | |
| June | 67°F (19°C) | 1.3 in | Warmest |
| July | 66°F (19°C) | 8.9 in | |
| August | 65°F (19°C) | 9.7 in | Wettest |
| September | 65°F (18°C) | 2.9 in | |
| October | 62°F (17°C) | 1.3 in | |
| November | 60°F (15°C) | 0.8 in | |
| December | 60°F (15°C) | 0.8 in | Coldest, Driest |
Mersa has a seasonal temperature swing of 7°F / from 60°F in December to 67°F in June. Total annual precipitation is 36.3 inches, with August being the wettest month (9.7") and December the driest (0.8").