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Monthly climate in Assab, Eritrea

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Assab features a hot desert climate (BWh). Temperatures typically range between 25 °C (78 °F) and 33 °C (91 °F) through the year, but rarely can drop to 21 °C (70 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 45 mm (1.8 inches) and receives 4 rainy days on the 1 mm (0.04 inches) threshold annually. Assab enjoys an average of 3893 hours of sunshine throughout the year, and daylight varies from 11 hours 21 minutes to 12 hours 51 minutes per day.

Monthly average temperatures in Assab, Eritrea

The warmest months in Assab are July, August and September, with daily mean temperatures ranging from 32 to 33 °C (90 - 91 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 25 to 26 °C (78 - 79 °F) throughout the day. On average each year, Assab experiences 329 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Assab. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum30°C
(86°F)		31°C
(89°F)		33°C
(92°F)		35°C
(94°F)		36°C
(97°F)		36°C
(97°F)		37°C
(99°F)		37°C
(99°F)		36°C
(97°F)		34°C
(94°F)		33°C
(91°F)		31°C
(88°F)
Mean maximum29°C
(84°F)		30°C
(86°F)		32°C
(90°F)		34°C
(93°F)		35°C
(96°F)		35°C
(96°F)		36°C
(97°F)		36°C
(98°F)		36°C
(96°F)		34°C
(93°F)		32°C
(90°F)		30°C
(87°F)
Average high28°C
(82°F)		28°C
(83°F)		30°C
(86°F)		32°C
(89°F)		33°C
(92°F)		34°C
(93°F)		35°C
(95°F)		35°C
(95°F)		34°C
(94°F)		32°C
(91°F)		30°C
(87°F)		29°C
(84°F)
Daily mean25°C
(78°F)		25°C
(78°F)		27°C
(81°F)		29°C
(85°F)		31°C
(88°F)		32°C
(90°F)		33°C
(91°F)		33°C
(91°F)		32°C
(90°F)		30°C
(86°F)		28°C
(82°F)		26°C
(79°F)
Average low23°C
(74°F)		23°C
(74°F)		25°C
(77°F)		27°C
(80°F)		29°C
(84°F)		30°C
(87°F)		31°C
(88°F)		31°C
(88°F)		31°C
(87°F)		28°C
(82°F)		25°C
(78°F)		24°C
(75°F)
Mean minimum22°C
(71°F)		22°C
(72°F)		23°C
(74°F)		25°C
(78°F)		27°C
(81°F)		29°C
(84°F)		29°C
(84°F)		29°C
(85°F)		29°C
(84°F)		26°C
(79°F)		24°C
(76°F)		23°C
(73°F)
Minimum21°C
(70°F)		21°C
(70°F)		23°C
(73°F)		24°C
(76°F)		26°C
(79°F)		27°C
(81°F)		26°C
(79°F)		26°C
(80°F)		28°C
(82°F)		25°C
(78°F)		24°C
(75°F)		22°C
(71°F)

Compare climate in Assab with other places

Compare temperature, precipitation, sunshine, UV index in Assab, Eritrea with other places around the world.

Monthly average precipitation in Assab, Eritrea

Assab usually has the most precipitation in January, July and August, with an average of 0 rainy days and 9 mm (0.3 inches) of precipitation per month. The driest months in Assab are June, November and December. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Assab. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)5 (0.2)3 (0.1)2 (0.1)3 (0.1)3 (0.1)1 (0.0)13 (0.5)8 (0.3)2 (0.1)4 (0.2)0 (0.0)0 (0.0)
Average precipitation days (≥ 1 mm)110100100000

Monthly sunshine hours in Assab, Eritrea

The sunniest months in Assab are March, April and May, when the sun shines an average of 11 hours 14 minutes a day. Least sunny months in Assab: January, February and July receive an average of 9 hours 49 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Assab. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours269303343340349327321326322336322331
Mean daily daylight hours11h 26m11h 42m12h 3m12h 24m12h 42m12h 51m12h 47m12h 31m12h 10m11h 49m11h 30m11h 21m

Solar UV radiation in Assab, Eritrea

Assab experiences the highest level of ultraviolet (UV) radiation in March, April and May, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme category of sun exposure. June, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly Assab UV Index data.

Average daily maximum UV levels by month for Assab. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)1011121313101010101098