Do you need to know, when is the best time to go to United Arab Emirates? Then you should take a look here, what weather you can expect there during the year.
The climate of United Arab Emirates is dry, very hot and sunny. Weather is cooler in eastern mountains, Al Hajar al Gharbi mountains. During late summer you can expect a humid southeastern wind, which sometimes makes the coastal region quite unpleasant.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Abu Dhabi, Ajman, Al Ain, Dibba, Dubai, Fujairah, Hatta, Khor Fakkan, Liwa Oasis, Ra's al Khaymah, Ruwais, Sharjah, Sir Bani Yas Island, Umm al Quwain, Yas 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 July, the average maximum temperature is 41.9 ℃ (107.42 ℉). The average minimum temperature in this month is 27.9 ℃ (82.22 ℉). The coldest month here is January, the average maximum temperature is 23.9 ℃ (75.02 ℉). The average minimum temperature in this month is 11.8 ℃ (53.24 ℉). The most rainy month here is March, the average number of rainy days is 4. The least rainy month here is May, the average number of rainy days is 0. 
When travelling to some places in United Arab Emirates, always consider the altitude of the the place as well. The highest point here is Jabal Yibir (1527 m) and the lowest point is Persian Gulf (0 m). So the differences in altitudes in this country are not negligible and you should expect the weather to be different in places in different altitudes. 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 United Arab Emirates in January is this: The average highest temperature in United Arab Emirates in January is 23.9 ℃ (75.02 ℉). The average lowest temperature is 11.8 ℃ (53.24 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 25.2 ℃ (77.36 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 24.1 ℃ (75.38 ℉). The average number of rainy days in January is 0.8. The average rainfall is 3.8 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 10:38 (hours and minutes), in the middle of the month 10:47 and at the end of the month 11:01.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 United Arab Emirates in February is this: The average highest temperature in United Arab Emirates in February is 24.3 ℃ (75.74 ℉). The average lowest temperature is 13.6 ℃ (56.48 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 24.1 ℃ (75.38 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 26.2 ℃ (79.16 ℉). The average number of rainy days in February is 3.4. The average rainfall is 41 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 11:01 (hours and minutes), in the middle of the month 11:19 and at the end of the month 11:39.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 United Arab Emirates in March is this: The average highest temperature in United Arab Emirates in March is 28.1 ℃ (82.58 ℉). The average lowest temperature is 15.9 ℃ (60.62 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 26.2 ℃ (79.16 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 31.2 ℃ (88.16 ℉). The average number of rainy days in March is 4. The average rainfall is 24.5 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 11:39 (hours and minutes), in the middle of the month 12:01 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 United Arab Emirates in April is this: The average highest temperature in United Arab Emirates in April is 34.3 ℃ (93.74 ℉). The average lowest temperature is 19.7 ℃ (67.46 ℉). 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 36.45 ℃ (97.61 ℉). The average number of rainy days in April is 1.4. The average rainfall is 7.4 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 12:22 (hours and minutes), in the middle of the month 12:43 and at the end of the month 13:02.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 United Arab Emirates in May is this: The average highest temperature in United Arab Emirates in May is 38.6 ℃ (101.48 ℉). The average lowest temperature is 23.4 ℃ (74.12 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 36.45 ℃ (97.61 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 38.8 ℃ (101.84 ℉). The average number of rainy days in May is 0. The average rainfall is 0 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 13:02 (hours and minutes), in the middle of the month 13:19 and at the end of the month 13:31.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 United Arab Emirates in June is this: The average highest temperature in United Arab Emirates in June is 39 ℃ (102.2 ℉). The average lowest temperature is 25.3 ℃ (77.54 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 38.8 ℃ (101.84 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 40.45 ℃ (104.81 ℉). The average number of rainy days in June is 0. The average rainfall is 0 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 13:31 (hours and minutes), in the middle of the month 13:38 and at the end of the month 13:38.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 United Arab Emirates in July is this: The average highest temperature in United Arab Emirates in July is 41.9 ℃ (107.42 ℉). The average lowest temperature is 27.9 ℃ (82.22 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 40.45 ℃ (104.81 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 41.8 ℃ (107.24 ℉). The average number of rainy days in July is 0. The average rainfall is 0 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 13:38 (hours and minutes), in the middle of the month 13:31 and at the end of the month 13:18.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 United Arab Emirates in August is this: The average highest temperature in United Arab Emirates in August is 41.7 ℃ (107.06 ℉). The average lowest temperature is 28.8 ℃ (83.84 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 41.8 ℃ (107.24 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 40.85 ℃ (105.53 ℉). The average number of rainy days in August 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 13:18 (hours and minutes), in the middle of the month 13:02 and at the end of the month 12:42.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 United Arab Emirates in September is this: The average highest temperature in United Arab Emirates in September is 40 ℃ (104 ℉). The average lowest temperature is 25.7 ℃ (78.26 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 40.85 ℃ (105.53 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 38.2 ℃ (100.76 ℉). The average number of rainy days in September is 0. The average rainfall is 0 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 12:42 (hours and minutes), in the middle of the month 12:22 and at the end of the month 12:01.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 United Arab Emirates in October is this: The average highest temperature in United Arab Emirates in October is 36.4 ℃ (97.52 ℉). The average lowest temperature is 21.9 ℃ (71.42 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 38.2 ℃ (100.76 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 33.35 ℃ (92.03 ℉). The average number of rainy days in October is 0. The average rainfall is 0 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 12:01 (hours and minutes), in the middle of the month 11:40 and at the end of the month 11:19.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 United Arab Emirates in November is this: The average highest temperature in United Arab Emirates in November is 30.3 ℃ (86.54 ℉). The average lowest temperature is 17.8 ℃ (64.04 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 33.35 ℃ (92.03 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 28.4 ℃ (83.12 ℉). The average number of rainy days in November is 0.2. The average rainfall is 1.8 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 11:19 (hours and minutes), in the middle of the month 11:01 and at the end of the month 10:47.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 United Arab Emirates in December is this: The average highest temperature in United Arab Emirates in December is 26.5 ℃ (79.7 ℉). The average lowest temperature is 14 ℃ (57.2 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 28.4 ℃ (83.12 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 25.2 ℃ (77.36 ℉). The average number of rainy days in December is 2.1. The average rainfall is 9.2 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 10:47 (hours and minutes), in the middle of the month 10:39 and at the end of the month 10:37.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.| Abu Dhabi | temperature: - | highest temperature: 26.5 ℃ (79.7 ℉) | lowest temperature: 14 ℃ (57.2 ℉) | rainfall: 9.2mm | rainy days: 2.1 |
| Dubai | temperature: - | highest temperature: 26.1 ℃ (78.98 ℉) | lowest temperature: 15.7 ℃ (60.26 ℉) | rainfall: 14mm | rainy days: 2 |
| Ras Al Khaimah | temperature: - | highest temperature: 27.1 ℃ (80.78 ℉) | lowest temperature: 13.5 ℃ (56.3 ℉) | rainfall: 17mm | rainy days: 2.3 |