Do you need to know, when is the best time to go to Belize? Then you should take a look here, what weather you can expect there during the year.
The climate of Belize is tropical, very hot and humid. There are two seasons, rainy season from May to November and dry season from February to May. You can expect various temperatures according to elevation and proximity to the coast. But generally speaking the temperatures are pleasant during the whole year. Belize lies in hurricane zone.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Actun Tunichil Muknal, Altun Ha, Ambergris Caye, Belize City, Belize District, Belmopan, Blue Creek, Caracol, Caye Caulker, Cayo, Cockscomb Basin Wildlife Sanctuary, Corozal Town, Crooked Tree, Dangriga, Five Blues Lake National Park, Hopkins, Lamanai, Lubaantun, Mayflower Bocawina National Park, Mountain Pine Ridge, Northern Belize, Orange Walk Town, Placencia, Placencia Peninsula, Punta Gorda, San Antonio, San Ignacio, Seine Bight, St. George's Caye, Stann Creek, Tobacco Caye, Toledo, Toledo Settlement, Xunantunich.
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 May, the average maximum temperature is 35 ℃ (95 ℉). The average minimum temperature in this month is 21.5 ℃ (70.7 ℉). The coldest month here is December, the average maximum temperature is 28.2 ℃ (82.76 ℉). The average minimum temperature in this month is 18.9 ℃ (66.02 ℉). The most rainy month here is July, the average number of rainy days is 21.2. The least rainy month here is April, the average number of rainy days is 4.9. 
When travelling to some places in Belize, always consider the altitude of the the place as well. The highest point here is Doyle's Delight (1124 m) and the lowest point is Caribbean Sea (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 Belize in January is this: The average highest temperature in Belize in January is 28.3 ℃ (82.94 ℉). The average lowest temperature is 18.1 ℃ (64.58 ℉). At the beginning of January you can expect lower temperatures, the average highest temperature is around 28.25 ℃ (82.85 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 29.1 ℃ (84.38 ℉). The average number of rainy days in January is 12.9. The average rainfall is 130.1 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 11:06 (hours and minutes), in the middle of the month 11:12 and at the end of the month 11:22.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.Typical (usual) weather in Belize in February is this: The average highest temperature in Belize in February is 29.9 ℃ (85.82 ℉). The average lowest temperature is 18.1 ℃ (64.58 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 29.1 ℃ (84.38 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 30.8 ℃ (87.44 ℉). The average number of rainy days in February is 9.1. The average rainfall is 64.8 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 11:22 (hours and minutes), in the middle of the month 11:34 and at the end of the month 11:48.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.Typical (usual) weather in Belize in March is this: The average highest temperature in Belize in March is 31.7 ℃ (89.06 ℉). The average lowest temperature is 19.2 ℃ (66.56 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 30.8 ℃ (87.44 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 32.25 ℃ (90.05 ℉). The average number of rainy days in March is 5.9. The average rainfall is 43.5 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 11:48 (hours and minutes), in the middle of the month 12:02 and at the end of the month 12:17.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.Typical (usual) weather in Belize in April is this: The average highest temperature in Belize in April is 32.8 ℃ (91.04 ℉). 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 32.25 ℃ (90.05 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 33.9 ℃ (93.02 ℉). The average number of rainy days in April is 4.9. The average rainfall is 43.9 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 12:17 (hours and minutes), in the middle of the month 12:31 and at the end of the month 12:44.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.Typical (usual) weather in Belize in May is this: The average highest temperature in Belize in May is 35 ℃ (95 ℉). The average lowest temperature is 21.5 ℃ (70.7 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 33.9 ℃ (93.02 ℉). At the end of May you can expect lower temperatures, the average highest temperature is around 33.5 ℃ (92.3 ℉). The average number of rainy days in May is 8.2. The average rainfall is 82.8 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 12:44 (hours and minutes), in the middle of the month 12:56 and at the end of the month 13:04.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.Typical (usual) weather in Belize in June is this: The average highest temperature in Belize in June is 32 ℃ (89.6 ℉). The average lowest temperature is 22.5 ℃ (72.5 ℉). At the beginning of June you can expect higher temperatures, the average highest temperature is around 33.5 ℃ (92.3 ℉). At the end of June you can expect lower temperatures, the average highest temperature is around 31.9 ℃ (89.42 ℉). The average number of rainy days in June is 19.3. The average rainfall is 308.8 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 13:04 (hours and minutes), in the middle of the month 13:09 and at the end of the month 13:08.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.Typical (usual) weather in Belize in July is this: The average highest temperature in Belize in July is 31.8 ℃ (89.24 ℉). The average lowest temperature is 21.9 ℃ (71.42 ℉). At the beginning of July you can expect higher temperatures, the average highest temperature is around 31.9 ℃ (89.42 ℉). At the end of July you can expect higher temperatures, the average highest temperature is around 32.25 ℃ (90.05 ℉). The average number of rainy days in July is 21.2. The average rainfall is 269.4 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 13:08 (hours and minutes), in the middle of the month 13:04 and at the end of the month 12:55.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.Typical (usual) weather in Belize in August is this: The average highest temperature in Belize in August is 32.7 ℃ (90.86 ℉). The average lowest temperature is 22.1 ℃ (71.78 ℉). At the beginning of August you can expect lower temperatures, the average highest temperature is around 32.25 ℃ (90.05 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 32.65 ℃ (90.77 ℉). The average number of rainy days in August is 18.5. The average rainfall is 223.9 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 12:55 (hours and minutes), in the middle of the month 12:44 and at the end of the month 12:31.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.Typical (usual) weather in Belize in September is this: The average highest temperature in Belize in September is 32.6 ℃ (90.68 ℉). The average lowest temperature is 22.3 ℃ (72.14 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 32.65 ℃ (90.77 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 31.85 ℃ (89.33 ℉). The average number of rainy days in September is 19.5. The average rainfall is 259.8 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 12:31 (hours and minutes), in the middle of the month 12:17 and at the end of the month 12:02.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.Typical (usual) weather in Belize in October is this: The average highest temperature in Belize in October is 31.1 ℃ (87.98 ℉). The average lowest temperature is 21.8 ℃ (71.24 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 31.85 ℃ (89.33 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 30.3 ℃ (86.54 ℉). The average number of rainy days in October is 18.1. The average rainfall is 212.5 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 12:02 (hours and minutes), in the middle of the month 11:48 and at the end of the month 11:34.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.Typical (usual) weather in Belize in November is this: The average highest temperature in Belize in November is 29.5 ℃ (85.1 ℉). The average lowest temperature is 19.8 ℃ (67.64 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 30.3 ℃ (86.54 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 28.85 ℃ (83.93 ℉). The average number of rainy days in November is 16.1. The average rainfall is 202.6 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 11:34 (hours and minutes), in the middle of the month 11:22 and at the end of the month 11:12.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.Typical (usual) weather in Belize in December is this: The average highest temperature in Belize in December is 28.2 ℃ (82.76 ℉). The average lowest temperature is 18.9 ℃ (66.02 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 28.85 ℃ (83.93 ℉). At the end of December you can expect higher temperatures, the average highest temperature is around 28.25 ℃ (82.85 ℉). The average number of rainy days in December is 14.8. The average rainfall is 174.7 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 11:12 (hours and minutes), in the middle of the month 11:06 and at the end of the month 11:05.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.| Belize City | temperature: - | highest temperature: 28.3 ℃ (82.94 ℉) | lowest temperature: 20.1 ℃ (68.18 ℉) | rainfall: 173.5mm | rainy days: 12.1 |
| Belmopan City | temperature: - | highest temperature: 28.2 ℃ (82.76 ℉) | lowest temperature: 18.9 ℃ (66.02 ℉) | rainfall: 174.7mm | rainy days: 14.8 |