Belize, extensive articles, photos and links.

Belize Annual Rainfall

Belize annual rainfall chart.
ABOVE: Belize annual rainfall as recorded by various weather stations in Belize. Note that Consejo in Corozal is the extreme north of Belize. Tower Hill refers to the Orange Walk district. PSWGIA is the Internatioinal Airport in Belize city. Belmopan is the inland capital, Central Farm is a couple of miles from San Ignacio, Cayo District. TRDP is Stann Creek and Punta Gorda is the extreme south.


One of the top questions we get asked is: what's the Belize annual rainfall? Generally, Belize enjoys good sub-tropical weather. We are not meteorologists, so we enlisted the assistance of the Belize Weather Bureau for the following summary:

Belize is situated on the Caribbean coast of Central America with Mexico to the North and Guatemala to the west and south. It lies between 15º45´ and 18º30´N and 87º30´ and 89º15´W. The terrain is low and flat along coastal areas and in some northern regions of the country while in the central and southern regions low mountains rise gradually to a height of 3,685 feet.

Our weather is characterized by two seasons: a rainy and a dry season. Belize annual rainfall: most of the year's rainfall occurs during the period June to November, that is, the rainy season. It is noted that the transition from dry to the rainy is very sharp. Belize annual rainfall ranges from 60 inches (1524mm) in the north to 160 inches (4064mm) in the south. Except for the southern regions, the rainfall is variable from year to year.

The onset of the rainy season begins in the early May in Toledo, (where the Belize annual rainfall is highest) progressing north to the Stann Creek, Belize, Cayo and Orange Walk District in late May, followed by Corozal District in early June. The mean temperature varies from 81°F/ 27°C along the coast to 69°F/21°C in the hills. The coldest month is January while the highest temperatures are experienced during the month of May.

In the south the rainfall is further enhanced by the intrusion of the Inter-Tropical Convergence Zone (ITCZ) as it journeys northwards. Orographic lifting over steep slopes in the south also enhances rainfall activity. The southern region has one maximum which occurs in the month of July and is by far the wettest month.

Central Regions show a primary and secondary maxima occurring in June and September. Each of these is significantly less than the single maximum for the south.

The data for the Northern region show that rainfall is more evenly distributed during the same period with no significant variation as in the other regions.

The rainy season exhibits a break or mark decrease in the month of August. This break is known as the "Mauga" season. However, this pattern is not evident in the Toledo district.

The main synoptic features that influence Belize annual rainfall trends are Tropical waves, Tropical storms and Hurricanes which move westward through the Caribbean from June to November. Tropical waves can be active or inactive systems and peak activity occurs during the months of June and July. Tropical storms and hurricanes peak during the months of September and October even though they vary in number from year to year.

In addition there are cold fronts that progress southeastward from the Continental USA into the Northwest Caribbean. The effect of frontal activity on rainfall distribution and therefore climatic conditions begins in October and ends in April peaking through December and January. A cold front moves across Belize about once every 10 days.

Other features include upper level troughs and cold core lows to lesser degrees; these sometimes interact with surface low level troughs resulting in the enhancement of precipitation. Below is a table showing the frequency of the synoptic systems that affect Belize.

The transition from wet to dry is a gradual process. The dry season is from November to May with April as the driest month. The dry season can be subdivided into a cool transition from November to February, as a result of the incursion of frontal systems and a warm dry period from March to May when high pressure systems in the Atlantic produce stable and windy south easterlies.

 


Home