Do you need to know, when is the best time to go to Marshall Islands? Then you should take a look here, what weather you can expect there during the year.
The climate of Marshall Islands is tropical. You can expect hot and humid weather here. Wet season is from May to November, dry season is from December to April. Not only a few typhoons begin as tropical storms in the region of Marshall Islands. Because of the very low elevation of the Marshall Islands, they are threatened by the potential sea level rise.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Ebeye, Kwajalein, Majuro, Ralik, Ratak.
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 September, the average maximum temperature is 31.8 ℃ (89.24 ℉). The average minimum temperature in this month is 25.9 ℃ (78.62 ℉). The coldest month here is February, the average maximum temperature is 30.2 ℃ (86.36 ℉). The average minimum temperature in this month is 25.9 ℃ (78.62 ℉). 
Typical (usual) weather in Marshall Islands in January is this: The average highest temperature in Marshall Islands in January is 31.2 ℃ (88.16 ℉). The average lowest temperature is 25.2 ℃ (77.36 ℉). At the beginning of January you can expect lower temperatures, the average highest temperature is around 31.05 ℃ (87.89 ℉). At the end of January you can expect lower temperatures, the average highest temperature is around 30.7 ℃ (87.26 ℉). The average rainfall is 115.3 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 11:37 (hours and minutes), in the middle of the month 11:40 and at the end of the month 11:44.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in February is this: The average highest temperature in Marshall Islands in February is 30.2 ℃ (86.36 ℉). The average lowest temperature is 25.9 ℃ (78.62 ℉). At the beginning of February you can expect higher temperatures, the average highest temperature is around 30.7 ℃ (87.26 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 30.5 ℃ (86.9 ℉). The average rainfall is 82.1 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 11:44 (hours and minutes), in the middle of the month 11:50 and at the end of the month 11:57.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in March is this: The average highest temperature in Marshall Islands in March is 30.8 ℃ (87.44 ℉). The average lowest temperature is 25.6 ℃ (78.08 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 30.5 ℃ (86.9 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 31 ℃ (87.8 ℉). The average rainfall is 105.5 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 11:57 (hours and minutes), in the middle of the month 12:04 and at the end of the month 12:11.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in April is this: The average highest temperature in Marshall Islands in April is 31.2 ℃ (88.16 ℉). The average lowest temperature is 25.7 ℃ (78.26 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 31 ℃ (87.8 ℉). At the end of April you can expect lower temperatures, the average highest temperature is around 30.85 ℃ (87.53 ℉). The average rainfall is 188 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 12:11 (hours and minutes), in the middle of the month 12:19 and at the end of the month 12:25.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in May is this: The average highest temperature in Marshall Islands in May is 30.5 ℃ (86.9 ℉). The average lowest temperature is 26.1 ℃ (78.98 ℉). At the beginning of May you can expect higher temperatures, the average highest temperature is around 30.85 ℃ (87.53 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 30.6 ℃ (87.08 ℉). The average rainfall is 249.7 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 12:25 (hours and minutes), in the middle of the month 12:31 and at the end of the month 12:35.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in June is this: The average highest temperature in Marshall Islands in June is 30.7 ℃ (87.26 ℉). The average lowest temperature is 25.9 ℃ (78.62 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 30.6 ℃ (87.08 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 31.2 ℃ (88.16 ℉). The average rainfall is 242.1 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 12:35 (hours and minutes), in the middle of the month 12:37 and at the end of the month 12:37.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in July is this: The average highest temperature in Marshall Islands in July is 31.7 ℃ (89.06 ℉). The average lowest temperature is 25.4 ℃ (77.72 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 31.2 ℃ (88.16 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 31.1 ℃ (87.98 ℉). The average rainfall is 265.3 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 12:37 (hours and minutes), in the middle of the month 12:35 and at the end of the month 12:31.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in August is this: The average highest temperature in Marshall Islands in August is 30.5 ℃ (86.9 ℉). The average lowest temperature is 26.2 ℃ (79.16 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 31.1 ℃ (87.98 ℉). At the end of August you can expect higher temperatures, the average highest temperature is around 31.15 ℃ (88.07 ℉). The average rainfall is 254.5 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 12:31 (hours and minutes), in the middle of the month 12:25 and at the end of the month 12:18.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in September is this: The average highest temperature in Marshall Islands in September is 31.8 ℃ (89.24 ℉). The average lowest temperature is 25.9 ℃ (78.62 ℉). At the beginning of September you can expect lower temperatures, the average highest temperature is around 31.15 ℃ (88.07 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 31.15 ℃ (88.07 ℉). The average rainfall is 301.9 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 12:18 (hours and minutes), in the middle of the month 12:11 and at the end of the month 12:04.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in October is this: The average highest temperature in Marshall Islands in October is 30.5 ℃ (86.9 ℉). The average lowest temperature is 25.6 ℃ (78.08 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 31.15 ℃ (88.07 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 30.4 ℃ (86.72 ℉). The average rainfall is 301.9 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 12:04 (hours and minutes), in the middle of the month 11:57 and at the end of the month 11:50.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in November is this: The average highest temperature in Marshall Islands in November is 30.3 ℃ (86.54 ℉). The average lowest temperature is 26 ℃ (78.8 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 30.4 ℃ (86.72 ℉). At the end of November you can expect higher temperatures, the average highest temperature is around 30.6 ℃ (87.08 ℉). The average rainfall is 266.7 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 11:50 (hours and minutes), in the middle of the month 11:44 and at the end of the month 11:40.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Marshall Islands in December is this: The average highest temperature in Marshall Islands in December is 30.9 ℃ (87.62 ℉). The average lowest temperature is 26.4 ℃ (79.52 ℉). At the beginning of December you can expect lower temperatures, the average highest temperature is around 30.6 ℃ (87.08 ℉). At the end of December you can expect higher temperatures, the average highest temperature is around 31.05 ℃ (87.89 ℉). The average rainfall is 201.2 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 11:40 (hours and minutes), in the middle of the month 11:37 and at the end of the month 11:36.These numbers above are valid primarily for the capital and the area around it.