Belize is typically hot and humid day and night year-round. Temperatures vary by only about 4°C between the coolest part of the year (December to March) and the hottest (May to September). The daily temperature range is around 10°C from the hottest part of the day to the coolest part of the night. In the uplands (Mountain Pine Ridge and the Maya Mountains) you can expect temperatures to fall by about 3°C for every 1000ft rise in altitude, making things noticeably more comfortable.
Belize has distinct wet and dry seasons. The wet season runs from mid-May to November in the south and from mid-June to November in the north. November to February is a transitional period, with the year’s coolest temperatures and a limited amount of rain. The true dry season is February to April. There’s quite a large difference in rainfall between the north of the country (around 1500mm or 60in a year) and the south (about 4000mm or 160in). In the north and center of the country there’s a dip in rainfall in August, between peaks in July and September.
Best Time to Travel to Belize
In Belize the high season for tourists corresponds roughly with the dry season: December to May. The shoulder months – especially December – receive a fair amount of rain, but not enough to scare away the multitudes of travelers who want to spend their holidays in the tropics. Most hotels and resorts are more expensive during this period (high-season rates are quoted throughout this book).
The biggest influx of tourists comes between December 15 and January 15, and during the weeks around Easter. Some hotels and resorts, especially top-end accommodations, charge extra-high prices during these peak periods. If you’re using top-end or some midrange accommodations, you’ll certainly save money by avoiding these seasons.
The rainy season runs from June to November. The early months, especially May and June, are actually a wonderful time to travel to Belize: you can avoid the tourist bustle and lodging is slightly cheaper. The only ownside is that it’s outside the lobster season, so you’ll have to forego at least one local specialty. Rivers start to swell and dirt roads get muddy. Some more remote roads may not be accessible to public transportation. With too much rain, some of the caves such as Actun Tunichil Muknal are dangerous and therefore closed to the public. Southern Belize is especially precarious during the rainy season; this relatively remote region receives two to three times as much rain as the rest of the country.
Belize Weather by Month
The overall climate of Belize can be described as sub-tropical. The humidity while high, is seldom oppressive and is most noticeable along the coast. The mean annual humidity is 83%, but on many days the humidity disappears with the cooling sea breezes. The Belize coastal area is exposed to southeast tradewinds averaging 10-13 knots, which can attain an uncanny consistency during the month of July.
Temperatures in Belize range from 50°F to 95°F with an annual mean of 79°F. November to January are traditionally the coolest months with a 75°F average, and May to September are the warmest, with an average of 81°F.
Location is a big factor for temperature as Cayo to the west can be several degrees colder than the coast. During November at night, temperatures can fall to a crisp 46°F in Cayo. In the mountains, the coldest days and nights might are relatively cold, and blankets will definitely be needed at night. However, the mean annual temperatures on in the mountains is a very comfortable 72°F.
Below is a breakdown of the weather in Belize by month:
Belize Weather in January
Generally mild temperatures, with intermittent rainfall. The end of the month marks the beginning of the dry season, so January is a very popular month for visitors to come experience Belize.
Daytime highs average around 80°F (27°C) with nights around 70°F (21°C).
Belize Weather in February
Very little rainfall and cool breezes make for very pleasant weather in February. Daytime highs average around 80°F (27°C) and nights rarely drop below 70°F (21°C), making this winter month still warm enough for T-shirts and sandals.
Belize Weather in March
Almost no rainfall, so the weather is extremely pleasant for visitors celebrating Easter in Belize. Temperatures during the day are around 83F (28°C), while nights stay breezy but warm at around 74F (23°C). One of the balmiest and most enjoyable times for visitors to experience Belize.
Belize Weather in April
Warmer temperatures mark the onset of the “Iguana Rains”, short, refreshing rain showers that keep temperatures pleasantly warm and excess humidity at bay. Days can get up to around 85°F (29°C) while nights stay comfortably warm at around 76°F (24°C).
Belize Weather in May
One of the warmer months, daytime temps are generally around 87°F (31°C), while it’s easy to enjoy the nightlife with temps falling to only around 79°F (26°C). Some light showers occur in the morning, while some nights see the occasional thunderstorm.
Belize Weather in June
Warming temperatures are moderated by plenty of fresh Caribbean breezes, with an average daytime high of 84°F (29°C), with warm nights as well at around 80°F (27°C). Expect to see a short rain shower on most afternoons that will quickly transition to sunny skies once again. One of the most enjoyable times for visitors to experience Belize.
Belize Weather in July
The heart of the summer, July daytime highs average around 86°F (30°C), while nights stay pleasantly warm with an average of 79°F (26°C). Expect to see plentiful rain showers in the early morning, and fairly frequent thunderstorms during the night. Fishing, diving and snorkeling opportunities are fantastic during this month.
Belize Weather in August
As the rainy season takes a break, August is known locally as the “Little Dry” month. The weather in Belize in August stays nice and warm, with daytime highs of about 86°F (30°C), while nights stay balmy at 78°F (26°C), making it perfect beach and swimming weather.
Belize Weather in September
Expect to see a brief resumption of regular rains during this month, especially early in the morning and during the night, but most days stay sunny and clear. Daytime temps average about 81°F (27°C), while nights stay pleasant with a low of 77°F (25°C).
Belize Weather in October
The rainy season begins in earnest, with more regular bouts of heavier rainfall. Occasionally, stronger rain storms known as “Northers” will bring plenty of precipitation, especially in the region of the Maya Mountains, which can see heavy rain for days at a stretch.
Daytime highs are slightly cooler, with a high of about 79°F (26°C), and lows reaching around 75°F (24°C).
Belize Weather in November
The coolest month in this tropical nation, daytime highs average about 76°F (24°C), with nights dipping down to around 73°F (23°C). Although these temperatures seem warm to visitors from America and Canada, this marks the beginning of winter for locals.
Belize Weather in December
This month usually starts with plenty of rain, but the end of the year heralds the start of the dry season. The last month of the year sees daytime highs at a pleasant average of 80°F (27°C), while nights average around 75°F (24°C), making Belize the perfect place to enjoy a balmy Christmas on the beach.
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