Do you need to know, when is the best time to go to Tuvalu? Then you should take a look here, what weather you can expect there during the year.
The climate of Tuvalu is tropical, weather is moderated by eastern winds from March to November. You can expect quite heavy rains from November to March. Cyclones are rare here.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Funafuti.
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 31.1 ℃ (87.98 ℉). The average minimum temperature in this month is 23.5 ℃ (74.3 ℉). The coldest month here is September, the average maximum temperature is 29.4 ℃ (84.92 ℉). The average minimum temperature in this month is 23.8 ℃ (74.84 ℉). The most rainy month here is January, the average number of rainy days is 0. The least rainy month here is January, the average number of rainy days is 0. 
Typical (usual) weather in Tuvalu in January is this: The average highest temperature in Tuvalu in January is 30.9 ℃ (87.62 ℉). The average lowest temperature is 23.8 ℃ (74.84 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 31 ℃ (87.8 ℉). At the end of January you can expect lower temperatures, the average highest temperature is around 30.5 ℃ (86.9 ℉). The average number of rainy days in January is 0. The average rainfall is 491 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 12:55 (hours and minutes), in the middle of the month 12:50 and at the end of the month 12:43.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in February is this: The average highest temperature in Tuvalu in February is 30.1 ℃ (86.18 ℉). The average lowest temperature is 24.3 ℃ (75.74 ℉). At the beginning of February you can expect higher temperatures, the average highest temperature is around 30.5 ℃ (86.9 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 30.15 ℃ (86.27 ℉). The average number of rainy days in February is 0. The average rainfall is 364.3 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 12:43 (hours and minutes), in the middle of the month 12:33 and at the end of the month 12:21.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in March is this: The average highest temperature in Tuvalu in March is 30.2 ℃ (86.36 ℉). The average lowest temperature is 23.7 ℃ (74.66 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 30.15 ℃ (86.27 ℉). At the end of March you can expect lower temperatures, the average highest temperature is around 30.2 ℃ (86.36 ℉). The average number of rainy days in March is 0. The average rainfall is 350.9 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 12:21 (hours and minutes), in the middle of the month 12:10 and at the end of the month 11:58.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in April is this: The average highest temperature in Tuvalu in April is 30.2 ℃ (86.36 ℉). The average lowest temperature is 24.6 ℃ (76.28 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 30.2 ℃ (86.36 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 30.35 ℃ (86.63 ℉). The average number of rainy days in April is 0. The average rainfall is 210 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 11:58 (hours and minutes), in the middle of the month 11:47 and at the end of the month 11:37.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in May is this: The average highest temperature in Tuvalu in May is 30.5 ℃ (86.9 ℉). 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 30.35 ℃ (86.63 ℉). At the end of May you can expect lower temperatures, the average highest temperature is around 30.1 ℃ (86.18 ℉). The average number of rainy days in May is 0. The average rainfall is 189.5 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 11:37 (hours and minutes), in the middle of the month 11:28 and at the end of the month 11:22.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in June is this: The average highest temperature in Tuvalu in June is 29.7 ℃ (85.46 ℉). The average lowest temperature is 23.6 ℃ (74.48 ℉). At the beginning of June you can expect higher temperatures, the average highest temperature is around 30.1 ℃ (86.18 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 30.05 ℃ (86.09 ℉). The average number of rainy days in June is 0. The average rainfall is 121.5 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 11:22 (hours and minutes), in the middle of the month 11:18 and at the end of the month 11:18.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in July is this: The average highest temperature in Tuvalu in July is 30.4 ℃ (86.72 ℉). The average lowest temperature is 23.2 ℃ (73.76 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 30.05 ℃ (86.09 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 30.05 ℃ (86.09 ℉). The average number of rainy days in July is 0. The average rainfall is 123.5 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 11:18 (hours and minutes), in the middle of the month 11:22 and at the end of the month 11:28.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in August is this: The average highest temperature in Tuvalu in August is 29.7 ℃ (85.46 ℉). The average lowest temperature is 23.3 ℃ (73.94 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 30.05 ℃ (86.09 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 29.55 ℃ (85.19 ℉). The average number of rainy days in August is 0. The average rainfall is 115.2 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 11:28 (hours and minutes), in the middle of the month 11:37 and at the end of the month 11:47.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in September is this: The average highest temperature in Tuvalu in September is 29.4 ℃ (84.92 ℉). The average lowest temperature is 23.8 ℃ (74.84 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 29.55 ℃ (85.19 ℉). At the end of September you can expect higher temperatures, the average highest temperature is around 29.6 ℃ (85.28 ℉). The average number of rainy days in September is 0. The average rainfall is 151.1 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 11:47 (hours and minutes), in the middle of the month 11:58 and at the end of the month 12:10.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in October is this: The average highest temperature in Tuvalu in October is 29.8 ℃ (85.64 ℉). The average lowest temperature is 23.4 ℃ (74.12 ℉). At the beginning of October you can expect lower temperatures, the average highest temperature is around 29.6 ℃ (85.28 ℉). At the end of October you can expect higher temperatures, the average highest temperature is around 29.9 ℃ (85.82 ℉). The average number of rainy days in October is 0. The average rainfall is 228.4 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 12:10 (hours and minutes), in the middle of the month 12:21 and at the end of the month 12:32.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in November is this: The average highest temperature in Tuvalu in November is 30 ℃ (86 ℉). The average lowest temperature is 24.1 ℃ (75.38 ℉). At the beginning of November you can expect lower temperatures, the average highest temperature is around 29.9 ℃ (85.82 ℉). At the end of November you can expect higher temperatures, the average highest temperature is around 30.55 ℃ (86.99 ℉). The average number of rainy days in November is 0. The average rainfall is 255.4 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 12:32 (hours and minutes), in the middle of the month 12:42 and at the end of the month 12:50.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Tuvalu in December is this: The average highest temperature in Tuvalu in December is 31.1 ℃ (87.98 ℉). The average lowest temperature is 23.5 ℃ (74.3 ℉). At the beginning of December you can expect lower temperatures, the average highest temperature is around 30.55 ℃ (86.99 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 31 ℃ (87.8 ℉). The average number of rainy days in December is 0. The average rainfall is 366.4 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 12:55 and at the end of the month 12:56.These numbers above are valid primarily for the capital and the area around it.