Do you need to know, when is the best time to go to Kiribati? Then you should take a look here, what weather you can expect there during the year.
The climate of Kiribati is tropical, marine. You can expect hot and humid weather, but it is moderated by winds. Weather is usually most pleasant from April to October, but you can expect rains from November to March - and even cyclones sometimes.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Abaiang, Abemama, Aranuka, Butaritari, Gilbert Islands, Kiritimati, Kuria, Line Islands, Marakei, Nonouti, Phoenix Islands, Tabuaeran, Tarawa.
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 31.2 ℃ (88.16 ℉). The average minimum temperature in this month is 25.3 ℃ (77.54 ℉). The coldest month here is July, the average maximum temperature is 29.8 ℃ (85.64 ℉). The average minimum temperature in this month is 25.2 ℃ (77.36 ℉). 
Typical (usual) weather in Kiribati in January is this: The average highest temperature in Kiribati in January is 30.1 ℃ (86.18 ℉). The average lowest temperature is 24.7 ℃ (76.46 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 30.45 ℃ (86.81 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 30.2 ℃ (86.36 ℉). The average rainfall is 215.5 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 11:43 (hours and minutes), in the middle of the month 11:45 and at the end of the month 11:48.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in February is this: The average highest temperature in Kiribati in February is 30.3 ℃ (86.54 ℉). The average lowest temperature is 25.8 ℃ (78.44 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 30.2 ℃ (86.36 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 30.7 ℃ (87.26 ℉). The average rainfall is 153.6 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 11:48 (hours and minutes), in the middle of the month 11:53 and at the end of the month 11:59.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in March is this: The average highest temperature in Kiribati in March is 31.1 ℃ (87.98 ℉). The average lowest temperature is 25.8 ℃ (78.44 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 30.7 ℃ (87.26 ℉). At the end of March you can expect lower temperatures, the average highest temperature is around 30.55 ℃ (86.99 ℉). The average rainfall is 205.4 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 11:59 (hours and minutes), in the middle of the month 12:05 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 Kiribati in April is this: The average highest temperature in Kiribati in April is 30 ℃ (86 ℉). The average lowest temperature is 25.3 ℃ (77.54 ℉). At the beginning of April you can expect higher temperatures, the average highest temperature is around 30.55 ℃ (86.99 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 30.1 ℃ (86.18 ℉). The average rainfall is 258.2 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 12:10 (hours and minutes), in the middle of the month 12:16 and at the end of the month 12:22.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in May is this: The average highest temperature in Kiribati in May is 30.2 ℃ (86.36 ℉). The average lowest temperature is 25.5 ℃ (77.9 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 30.1 ℃ (86.18 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 30.5 ℃ (86.9 ℉). The average rainfall is 288.3 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 12:22 (hours and minutes), in the middle of the month 12:26 and at the end of the month 12:30.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in June is this: The average highest temperature in Kiribati in June is 30.8 ℃ (87.44 ℉). The average lowest temperature is 25.5 ℃ (77.9 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 30.5 ℃ (86.9 ℉). At the end of June you can expect lower temperatures, the average highest temperature is around 30.3 ℃ (86.54 ℉). The average rainfall is 297.2 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 12:30 (hours and minutes), in the middle of the month 12:31 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 Kiribati in July is this: The average highest temperature in Kiribati in July is 29.8 ℃ (85.64 ℉). The average lowest temperature is 25.2 ℃ (77.36 ℉). At the beginning of July you can expect higher temperatures, the average highest temperature is around 30.3 ℃ (86.54 ℉). At the end of July you can expect higher temperatures, the average highest temperature is around 30 ℃ (86 ℉). The average rainfall is 338.1 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 12:31 (hours and minutes), in the middle of the month 12:29 and at the end of the month 12:26.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in August is this: The average highest temperature in Kiribati in August is 30.2 ℃ (86.36 ℉). The average lowest temperature is 25 ℃ (77 ℉). At the beginning of August you can expect lower temperatures, the average highest temperature is around 30 ℃ (86 ℉). At the end of August you can expect higher temperatures, the average highest temperature is around 30.7 ℃ (87.26 ℉). The average rainfall is 296.8 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 12:26 (hours and minutes), in the middle of the month 12:21 and at the end of the month 12:16.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in September is this: The average highest temperature in Kiribati in September is 31.2 ℃ (88.16 ℉). The average lowest temperature is 25.3 ℃ (77.54 ℉). At the beginning of September you can expect lower temperatures, the average highest temperature is around 30.7 ℃ (87.26 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 30.65 ℃ (87.17 ℉). The average rainfall is 318.7 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 12:16 (hours and minutes), in the middle of the month 12:10 and at the end of the month 12:05.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in October is this: The average highest temperature in Kiribati in October is 30.1 ℃ (86.18 ℉). The average lowest temperature is 25.7 ℃ (78.26 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 30.65 ℃ (87.17 ℉). At the end of October you can expect higher temperatures, the average highest temperature is around 30.55 ℃ (86.99 ℉). The average rainfall is 345.9 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 12:05 (hours and minutes), in the middle of the month 11:59 and at the end of the month 11:53.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in November is this: The average highest temperature in Kiribati in November is 31 ℃ (87.8 ℉). The average lowest temperature is 25.6 ℃ (78.08 ℉). At the beginning of November you can expect lower temperatures, the average highest temperature is around 30.55 ℃ (86.99 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 30.9 ℃ (87.62 ℉). The average rainfall is 333.1 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 11:53 (hours and minutes), in the middle of the month 11:49 and at the end of the month 11:45.These numbers above are valid primarily for the capital and the area around it.Typical (usual) weather in Kiribati in December is this: The average highest temperature in Kiribati in December is 30.8 ℃ (87.44 ℉). The average lowest temperature is 25.1 ℃ (77.18 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 30.9 ℃ (87.62 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 30.45 ℃ (86.81 ℉). The average rainfall is 300.2 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 11:45 (hours and minutes), in the middle of the month 11:43 and at the end of the month 11:42.These numbers above are valid primarily for the capital and the area around it.