Climate and monthly weather forecast
Cuiabá, Brazil

Cuiabá, Brazil finds itself embedded within the area characterized by the Köppen climate classification as Aw. The predominant climate, thus attributed, is tropical wet and dry or savanna. This geographical setting crafts unique weather patterns, which prominently command the year-round conditions.

Throughout the year, Cuiabá sees variations in each of its key weather parameters - temperature, rainfall, humidity, daylight, sunshine and UV index. Examining the monthly averages, the population experience high temperatures ranging from 30.7°C (87.3°F) in the month of June to an annual peak of 34.1°C (93.4°F) in August and September. Concurrently, low temperature fluctuates from a minimum of 16.6°C (61.9°F) in July to the highest low of 23.2°C (73.8°F) in January.

Rainfall patterns exhibit a clear cycle with drier months occurring from May through August, where rainfall levels stay below 16mm (0.63"), reaching a low of 10mm (0.39") in July. Contrastingly, rainfall surges between January and April, and again from October to December, peaking at 210mm (8.27") in January. Complementarily, instances of rain span from a mere three days in June, July, and August to a maximum of 19 days in January.

Humidity levels reflect the precipitation patterns with lower averages from 59% to 64% between July and September and increasing during the more rainy periods up to 80% between February and March. In relation to the daylight hours, they present a slight yearly variation from 11.2 hours in June to a high of 13 hours in December. The average amount of sunshine ranges from 5 hours in January to a high of 8 hours in July. Year-round, UV index stands high with minor fluctuations between 7 and 12, pointing out an almost constant high risk of harm from unprotected sun exposure.

The weather of Cuiabá is characteristically hot with high humidity during the wet months and slightly less intense during the drier months. Rainfall patterns show an evident seasonality with major downpours at the start and end of the calendar year, correspondingly creating a drier period from May to August.

The most propitious time for a visit would be between May to August where the rainfall transitions to a minimum, and the temperature averages are relatively lower, providing a more comfortable environment for outdoor activities. During this period, daylight hours span from 11.2 to 11.6 hours providing sufficient light for exploration and enjoyment of the local attractions. Notably, UV indices drop to a relatively safer yearly low during June, although protection from sun exposure remains necessary.

The span from January through April and October to December may pose discomfort for visitors not accustomed to high humidity levels complemented by heavy rainfall. These months record considerable rainfall with January seeing the highest at 210mm (8.27") spread across 19 days. This coincides with highs of temperature around 32.6°C (90.7°F) to 34°C (93.2°F), which combined with high humidity, creates stifling conditions that may mar the overall experience.

Spring unfolds in Cuiabá with the period of September through November witnessing an upsurge in rainfall from 11mm (0.43") to 154mm (6.06"). Concurrently, temperatures hover between 31.1°C (88°F) to 34.1°C (93.4°F), implying a warm, increasingly humid atmosphere. The daylight hours increase to a range of 12 hours to 12.8 hours, while sunlight hours stay relatively stable around 6 to 7 hours per day. This enhances the overall sunny and warm feel of the spring months.

Summer, from December through February, in Cuiabá is the warmest and wettest period with temperatures maintaining around 32.6°C (90.7°F) and rainfall counts peaking at 210mm (8.27") in January. Humidity levels remain elevated, averaging 78% to 80%, affording a generally muggy feel. Despite the voluminous rainfall, the amount of sunshine remains stable at 6 hours per day, whereas the daylight extends to its longest duration, achieving up to 13 hours in December.

During autumn, March through May, weather conditions depict a shift towards drier months. Rainfall decreases significantly from 171mm (6.73") in March to as low as 16mm (0.63") in May. Consequently, humidity begins to recede, falling from 79% in March to 72% in May. This period observes a slight cooling trend with high temperatures reducing from 32.7°C (90.9°F) to 30.7°C (87.3°F) and low temperatures also descending from average 22°C (71.6°F) to near 17.5°C (63.5°F) in May.

In Cuiabá, winter runs from June through August. This is the driest and coolest spell with rainfall resting around 10mm (0.39") to 11mm (0.43"), and humidity dipping to as low as 59% in September. Although the term "coolest" is relative, meaning highs of 31.8°C (89.2°F) in July to a peak summer high of 34.1°C (93.4°F) in August, and lows from 16.6°C (61.9°F) in July up to 22.1°C (71.8°F) in September. Sunshine hours increase to an annual high of 8 hours in July, offering a higher likelihood of clear skies.

January is the month that historically begins the year with high temperatures in Cuiabá, Brazil. The most remarkable characteristics are the high temperatures that reach an average maximum of 32.6°C (90.7°F) and a humidity level of about 78%. Weather in January »

As Cuiabá moves into February, a continuation of the high temperatures and humidity from January is evident. Maximum temperatures remained unaltered at 32.6°C (90.7°F), upholding the city's reputation for high heat. However, this doesn't make February an unfavorable month, but instead presents an opportunity to enjoy a variety of outdoor activities during the 12.6 hours of daylight. Weather in February »

March in Cuiabá sees a slight rise in temperature with an average maximum temperature reaching 32.9°C (91.2°F), making it the third hottest month of the year. This slight temperature increase aligns with the decrease in rainfall, making March an excellent time for outdoor pursuits. Weather in March »

In April, Cuiabá sees a temperate and dry climate that stands out distinctly from March. The maximum temperature averages to around 32.7°C (90.9°F), offering a slightly cooler atmosphere. Amid this slight relief from the scorching summer heat, April is the month of appreciable solar exposure with 7 hours of sunshine. Weather in April »

May brings a pleasant atmosphere to Cuiabá with a further drop in the maximum temperature reaching 31.6°C (88.9°F). The reduction in heat is coupled with a noticeable decrease in rainfall which makes May relatively dry. The dry and warm weather introduces a new seasonal dynamic, paving the way for different recreational activities. Weather in May »

June introduces the winter season in Cuiabá, but the city never really experiences a real winter as known in temperate regions. The daily high averages at around 30.7°C (87.3°F), marking the transition from high temperatures to a more pleasant climate. Weather in June »

July is the coolest month in Cuiabá with the lowest average minimum temperature falling to 16.6°C (61.9°F). This cooler temperature paired with the lowest relative humidity value in the year enhances a mild, dry climate in this Brazilian city. Weather in July »

As Cuiabá heads into August, temperatures rise slightly, with an average high of 34.1°C (93.4°F). This escalation in temperature, alongside a rise in humidity level, hints towards the return of warmer conditions. August brings back clear, sunny days, reminding residents of the city's tropical climate. Weather in August »

September in Cuiabá is marked by a consistency in the high temperature, maintaining an average high of 34.1°C (93.4°F). It is one of the months with the highest temperatures and denotes the peak of dry season with an increase in rainfall. Weather in September »

October showcases fluctuating weather in Cuiabá with temperatures slightly declining to an average high of 34°C (93.2°F). This slight reduction in temperature aligns with the increase in rainfall, making October lean towards wetter conditions. Weather in October »

November in Cuiabá has relatively lower temperatures with the maximum reaching 31.1°C (88°F). This norm, along with an increased rainfall, signals the onset of a slightly cooler season. Despite these variations, daylight hours are fairly consistent, providing a fair balance between day and night time. Weather in November »

December usually has nearly similar weather conditions to November, with an increase in daytime temperatures to an average high of 32.5°C (90.5°F). The weather retains a delicate balance between maintaining the warmth and preparing for the next year. Weather in December »