Do you need to know, when is the best time to go to Namibia? Then you should take a look here, what weather you can expect there during the year.
The climate of Namibia is hot and dry. Rainfall is rare and erratic. You can expect sunny weather there, as Namibia has more than 300 days of sunshine per year. The winter is from June to August and it is usually dry. Two rainy seasons come in summer: one from September to November, one from February to April.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Aus, Caprivi, Central Namibia, Etosha National Park, Fish River Canyon Park, Gobabis, Grootfontein, Kaokoland, Karasburg, Katima Mulilo, Keetmanshoop, Lüderitz, Namib Naukluft National Park, Nkasa Lupala National Park, Northern Namibia, Opuwo, Oranjemund, Oshakati, Otjiwarongo, Outjo, Rehoboth, Rundu, Skeleton Coast National Park, Sossusvlei, Southern Namibia, Spitzkoppe, Swakopmund, Tsumeb, Tsumkwe, Walvis Bay, Waterberg Plateau Park, Windhoek.
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 December, the average maximum temperature is 32.2 ℃ (89.96 ℉). The average minimum temperature in this month is 17.1 ℃ (62.78 ℉). The coldest month here is June, the average maximum temperature is 20.8 ℃ (69.44 ℉). The average minimum temperature in this month is 7 ℃ (44.6 ℉). The most rainy month here is January, the average number of rainy days is 12.4. The least rainy month here is July, the average number of rainy days is 0.1. 
When travelling to some places in Namibia, always consider the altitude of the the place as well. The highest point here is Konigstein on Brandberg (2573 m) and the lowest point is Atlantic Ocean (0 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 Namibia in January is this: The average highest temperature in Namibia in January is 30.5 ℃ (86.9 ℉). The average lowest temperature is 17.6 ℃ (63.68 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 31.35 ℃ (88.43 ℉). At the end of January you can expect lower temperatures, the average highest temperature is around 29.85 ℃ (85.73 ℉). The average number of rainy days in January is 12.4. The average rainfall is 87.3 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 13:28 (hours and minutes), in the middle of the month 13:20 and at the end of the month 13:07.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 Namibia in February is this: The average highest temperature in Namibia in February is 29.2 ℃ (84.56 ℉). The average lowest temperature is 17.3 ℃ (63.14 ℉). At the beginning of February you can expect higher temperatures, the average highest temperature is around 29.85 ℃ (85.73 ℉). At the end of February you can expect lower temperatures, the average highest temperature is around 28.25 ℃ (82.85 ℉). The average number of rainy days in February is 12.1. The average rainfall is 93.3 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 13:07 (hours and minutes), in the middle of the month 12:50 and at the end of the month 12:32.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 Namibia in March is this: The average highest temperature in Namibia in March is 27.3 ℃ (81.14 ℉). The average lowest temperature is 16 ℃ (60.8 ℉). At the beginning of March you can expect higher temperatures, the average highest temperature is around 28.25 ℃ (82.85 ℉). At the end of March you can expect lower temperatures, the average highest temperature is around 26.45 ℃ (79.61 ℉). The average number of rainy days in March is 10.9. The average rainfall is 69.6 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 12:32 (hours and minutes), in the middle of the month 12:12 and at the end of the month 11:53.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 Namibia in April is this: The average highest temperature in Namibia in April is 25.6 ℃ (78.08 ℉). The average lowest temperature is 12.9 ℃ (55.22 ℉). At the beginning of April you can expect higher temperatures, the average highest temperature is around 26.45 ℃ (79.61 ℉). At the end of April you can expect lower temperatures, the average highest temperature is around 24.7 ℃ (76.46 ℉). The average number of rainy days in April is 6.6. The average rainfall is 35.6 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 11:53 (hours and minutes), in the middle of the month 11:34 and at the end of the month 11:17.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 Namibia in May is this: The average highest temperature in Namibia in May is 23.8 ℃ (74.84 ℉). The average lowest temperature is 9.9 ℃ (49.82 ℉). At the beginning of May you can expect higher temperatures, the average highest temperature is around 24.7 ℃ (76.46 ℉). At the end of May you can expect lower temperatures, the average highest temperature is around 22.3 ℃ (72.14 ℉). The average number of rainy days in May is 1.5. The average rainfall is 5.8 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 11:17 (hours and minutes), in the middle of the month 11:02 and at the end of the month 10:52.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 Namibia in June is this: The average highest temperature in Namibia in June is 20.8 ℃ (69.44 ℉). The average lowest temperature is 7 ℃ (44.6 ℉). At the beginning of June you can expect higher temperatures, the average highest temperature is around 22.3 ℃ (72.14 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 21.25 ℃ (70.25 ℉). The average number of rainy days in June is 0.5. The average rainfall is 1.5 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 10:52 (hours and minutes), in the middle of the month 10:46 and at the end of the month 10:46.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 Namibia in July is this: The average highest temperature in Namibia in July is 21.7 ℃ (71.06 ℉). The average lowest temperature is 7.2 ℃ (44.96 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 21.25 ℃ (70.25 ℉). At the end of July you can expect higher temperatures, the average highest temperature is around 22.7 ℃ (72.86 ℉). The average number of rainy days in July is 0.1. 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 10:46 (hours and minutes), in the middle of the month 10:52 and at the end of the month 11:03.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 Namibia in August is this: The average highest temperature in Namibia in August is 23.7 ℃ (74.66 ℉). The average lowest temperature is 8.9 ℃ (48.02 ℉). At the beginning of August you can expect lower temperatures, the average highest temperature is around 22.7 ℃ (72.86 ℉). At the end of August you can expect higher temperatures, the average highest temperature is around 25.6 ℃ (78.08 ℉). The average number of rainy days in August is 0.3. The average rainfall is 1.1 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 11:03 (hours and minutes), in the middle of the month 11:18 and at the end of the month 11:35.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 Namibia in September is this: The average highest temperature in Namibia in September is 27.5 ℃ (81.5 ℉). The average lowest temperature is 12.7 ℃ (54.86 ℉). At the beginning of September you can expect lower temperatures, the average highest temperature is around 25.6 ℃ (78.08 ℉). At the end of September you can expect higher temperatures, the average highest temperature is around 28.3 ℃ (82.94 ℉). The average number of rainy days in September is 1. The average rainfall is 4.3 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 11:35 (hours and minutes), in the middle of the month 11:53 and at the end of the month 12:12.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 Namibia in October is this: The average highest temperature in Namibia in October is 29.1 ℃ (84.38 ℉). The average lowest temperature is 15.1 ℃ (59.18 ℉). At the beginning of October you can expect lower temperatures, the average highest temperature is around 28.3 ℃ (82.94 ℉). At the end of October you can expect higher temperatures, the average highest temperature is around 29.85 ℃ (85.73 ℉). The average number of rainy days in October is 3.1. The average rainfall is 13.1 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 12:12 (hours and minutes), in the middle of the month 12:31 and at the end of the month 12:50.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 Namibia in November is this: The average highest temperature in Namibia in November is 30.6 ℃ (87.08 ℉). The average lowest temperature is 16.5 ℃ (61.7 ℉). At the beginning of November you can expect lower temperatures, the average highest temperature is around 29.85 ℃ (85.73 ℉). At the end of November you can expect higher temperatures, the average highest temperature is around 31.4 ℃ (88.52 ℉). The average number of rainy days in November is 6.2. The average rainfall is 29.4 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 12:50 (hours and minutes), in the middle of the month 13:07 and at the end of the month 13:20.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 Namibia in December is this: The average highest temperature in Namibia in December is 32.2 ℃ (89.96 ℉). The average lowest temperature is 17.1 ℃ (62.78 ℉). At the beginning of December you can expect lower temperatures, the average highest temperature is around 31.4 ℃ (88.52 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 31.35 ℃ (88.43 ℉). The average number of rainy days in December is 7.2. The average rainfall is 31.4 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 13:20 (hours and minutes), in the middle of the month 13:28 and at the end of the month 13:29.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.