Do you need to know, when is the best time to go to Djibouti? Then you should take a look here, what weather you can expect there during the year.
The climate of Djibouti is dry, you should not expect much variation of the weather during the year. It is usually hot year-round, but you can expect some rainfalls during winter. During December the weather may be very cold in the highlands.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Djibouti, Moucha Island.
Let's look now what weather you can expect in the area around the capital and in many other cities. The warmest month here is August, the average maximum temperature is 42.3 ℃ (108.14 ℉). The average minimum temperature in this month is 30.3 ℃ (86.54 ℉). The coldest month here is January, the average maximum temperature is 29.1 ℃ (84.38 ℉). The average minimum temperature in this month is 21.2 ℃ (70.16 ℉). 
When travelling to some places in Djibouti, always consider the altitude of the the place as well. The highest point here is Moussa Ali (2021 m) and the lowest point is Lac Assal (-155 m). So there are quite big differences in altitudes in this country, so you can expect the weather to be different in different altitudes as well. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Djibouti in January is this: The average highest temperature in Djibouti in January is 29.1 ℃ (84.38 ℉). The average lowest temperature is 21.2 ℃ (70.16 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 29.5 ℃ (85.1 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 29.35 ℃ (84.83 ℉). The average rainfall is 10.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:27 (hours and minutes), in the middle of the month 11:31 and at the end of the month 11:37.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in February is this: The average highest temperature in Djibouti in February is 29.6 ℃ (85.28 ℉). The average lowest temperature is 23.1 ℃ (73.58 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 29.35 ℃ (84.83 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 30.05 ℃ (86.09 ℉). The average rainfall is 19.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:37 (hours and minutes), in the middle of the month 11:45 and at the end of the month 11:54.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in March is this: The average highest temperature in Djibouti in March is 30.5 ℃ (86.9 ℉). The average lowest temperature is 24.2 ℃ (75.56 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 30.05 ℃ (86.09 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 31.2 ℃ (88.16 ℉). The average rainfall is 20.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:54 (hours and minutes), in the middle of the month 12:04 and at the end of the month 12:13.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in April is this: The average highest temperature in Djibouti in April is 31.9 ℃ (89.42 ℉). The average lowest temperature is 25.6 ℃ (78.08 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 31.2 ℃ (88.16 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 33.35 ℃ (92.03 ℉). The average rainfall is 29.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:13 (hours and minutes), in the middle of the month 12:23 and at the end of the month 12:31.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in May is this: The average highest temperature in Djibouti in May is 34.8 ℃ (94.64 ℉). The average lowest temperature is 27.9 ℃ (82.22 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 33.35 ℃ (92.03 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 37.35 ℃ (99.23 ℉). The average rainfall is 16.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:31 (hours and minutes), in the middle of the month 12:39 and at the end of the month 12:44.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in June is this: The average highest temperature in Djibouti in June is 39.9 ℃ (103.82 ℉). The average lowest temperature is 28.8 ℃ (83.84 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 37.35 ℃ (99.23 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 40.65 ℃ (105.17 ℉). The average rainfall is 0.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:44 (hours and minutes), in the middle of the month 12:47 and at the end of the month 12:47.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in July is this: The average highest temperature in Djibouti in July is 41.4 ℃ (106.52 ℉). The average lowest temperature is 31.8 ℃ (89.24 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 40.65 ℃ (105.17 ℉). At the end of July you can expect higher temperatures, the average highest temperature is around 41.85 ℃ (107.33 ℉). The average rainfall is 6.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:47 (hours and minutes), in the middle of the month 12:44 and at the end of the month 12:38.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in August is this: The average highest temperature in Djibouti in August is 42.3 ℃ (108.14 ℉). The average lowest temperature is 30.3 ℃ (86.54 ℉). At the beginning of August you can expect lower temperatures, the average highest temperature is around 41.85 ℃ (107.33 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 40.1 ℃ (104.18 ℉). The average rainfall is 5.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:38 (hours and minutes), in the middle of the month 12:31 and at the end of the month 12:22.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in September is this: The average highest temperature in Djibouti in September is 37.9 ℃ (100.22 ℉). The average lowest temperature is 29.4 ℃ (84.92 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 40.1 ℃ (104.18 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 35.95 ℃ (96.71 ℉). The average rainfall is 3.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:22 (hours and minutes), in the middle of the month 12:13 and at the end of the month 12:04.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in October is this: The average highest temperature in Djibouti in October is 34 ℃ (93.2 ℉). The average lowest temperature is 25.4 ℃ (77.72 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 35.95 ℃ (96.71 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 32.35 ℃ (90.23 ℉). The average rainfall is 20.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:04 (hours and minutes), in the middle of the month 11:54 and at the end of the month 11:45.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in November is this: The average highest temperature in Djibouti in November is 30.7 ℃ (87.26 ℉). The average lowest temperature is 23.5 ℃ (74.3 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 32.35 ℃ (90.23 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 30.3 ℃ (86.54 ℉). The average rainfall is 22.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:45 (hours and minutes), in the middle of the month 11:37 and at the end of the month 11:31.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Djibouti in December is this: The average highest temperature in Djibouti in December is 29.9 ℃ (85.82 ℉). The average lowest temperature is 21.7 ℃ (71.06 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 30.3 ℃ (86.54 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 29.5 ℃ (85.1 ℉). The average rainfall is 11 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:31 (hours and minutes), in the middle of the month 11:27 and at the end of the month 11:26.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.