Weather in Sinop

Planning your visit to Sinop? In this section, you will find the latest information on weather conditions, detailed charts, and an up-to-date forecast to help you better prepare for your trip.

Sinop is characterized by a hot tropical climate, with high temperatures typical throughout the year. Travellers should expect consistently warm weather: average daytime readings range from +29°C to +35°C. Cold weather is practically non-existent here, making the city an attractive destination for sun lovers in any season.

Weather conditions in the city are clearly divided into two distinct periods: wet and dry. From May to August, the rains practically stop, and clear, arid weather sets in — the ideal time for those who want to avoid precipitation. Conversely, the rainy season lasts from October to April, peaking during the summer months (January-March), when the number of rainy days can exceed 25 per month.

A specific feature of the local climate is that the highest temperatures are recorded not at the height of the rainy season, but at the end of the dry period — in August and September, the air warms up to +35°C. When planning a trip to Brazil and specifically to this region, it is important to consider this contrast: choose the middle of the year for dry walks or the beginning of the year if you prefer the riot of tropical greenery nourished by moisture.

The climate in Sinop is distinguished by consistently high temperatures throughout the year, making this Brazilian city a truly hot place. The concept of cold in the usual sense is practically absent here: annual average figures rarely drop below comfortable values. The hottest period is the transition season — August, September, and October. In September, the average temperature reaches its peak at 29.2°C, and daytime maximums often exceed the 35°C mark, creating conditions of intense heat.

The period from June to August, which is calendar winter in the Southern Hemisphere, has its own peculiarities in Sinop. Days at this time remain hot, with temperatures around 31–32°C, but nights become noticeably fresher. It is during these months that the most perceptible difference between daytime heat and evening coolness is observed: after sunset, the thermometer can drop to 19–20°C. This time of year is characterized by dry weather, which makes it easier to tolerate the high daytime temperatures.

From December to April, a more even temperature regime sets in. During these months, fluctuations between day and night are minimal: daytime maximums hover around 29–30°C, and nighttime minimums do not fall below 22°C. Thanks to such stability, the weather feels like an "eternal summer," without the extreme heat spikes typical of September, but also without the refreshing night coolness of the middle of the year.

The climate in Sinop is characterized by a clear division of the year into a pronounced rainy season and a dry period. Since the city is located in the tropical zone of Brazil, precipitation here falls exclusively in the form of rain. Travellers should carefully choose the time for their trip, as weather conditions differ drastically in different months.

The wettest period lasts from October to April. The peak of rainy weather falls on January, March, and December, when up to 27 rainy days per month are recorded. At this time, precipitation occurs almost daily, often in the form of warm tropical rains. November and April also remain quite wet, with more than 20 days of precipitation, so having an umbrella or raincoat is mandatory during this season.

The dry season arrives during the winter months of the Southern Hemisphere. June and July are the driest months of the year, when rains cease almost completely (statistics show 0 rainy days). In August, the probability of precipitation is also minimal. May and September serve as short transition periods: in May, the rains stop abruptly, and in September they begin to return, preparing nature for a new wet cycle.

Since Sinop features a warm tropical climate throughout the year, the foundation of your wardrobe should consist of items made from natural breathable fabrics, such as cotton and linen. T-shirts, shorts, and light dresses will be appropriate in any season. Do not forget comfortable walking shoes, preferably open and well-ventilated, to feel comfortable even on the hottest days, when temperatures in September and October can rise above 33°C.

It is important to consider the pronounced seasonality of rainfall when planning your luggage. The period from October to April is the rainy season, when the number of wet days reaches a maximum (up to 27 days per month). At this time, be sure to pack a compact umbrella and a light waterproof raincoat. If you are travelling in the dry season (from May to September), when there is practically no rain, pay special attention to sun protection: be sure to bring a wide-brimmed hat or cap, sunglasses, and cream with a high SPF factor.

Despite consistently high daytime temperatures, in the evenings, especially in June and July, the air can cool down to 19–20°C. Therefore, it is recommended to bring one light sweater, hoodie, or cardigan. The principle of layering will also come in handy in transport or shopping centres, where powerful air conditioners often operate. Furthermore, given the humid climate in certain months, it would not be amiss to bring a high-quality insect repellent.