Climate and monthly weather forecastBrownsville, TX

The climate of Brownsville

Predominantly, the climate of Brownsville, Texas, USA aligns to the Köppen climate classification Cfa, also known as Humid subtropical, with no dry season. Nestled close to the southerly border of Texas, Brownsville experiences unchanging weather patterns throughout the year.

A year in Brownsville consists of weather conditions marked by fairly consistent relative humidity levels, from 67% to 74%. The highest average temperatures range from 68.9°F (20.5°C) during the cooler months to 93.2°F (34°C) during the peak of summer, while the lowest average temperatures swing between 57°F (13.9°C) and 80.8°F (27.1°C).

Rainfall in Brownsville varies across the year with the most precipitation observed in September at 1.81" (46mm), while February experiences the least rainfall at 0.39" (10mm). The number of days with rainfall is highest in September, totaling 14.4 days, as compared to February and April with only 6.9 and 8.7 days respectively.

Visibility generally remains constant at 6 miles throughout the year. Wind speeds fluctuate from 9.3mph (15km/h) to 12.8mph (20.6km/h), while gusts can reach up to 18.1mph (29.1km/h). Brownsville also witnesses fluctuating pressure levels that range from 29.88" (759mm) to 30.11" (765mm).

The best time to visit Brownsville

From a weather perspective, the most favorable time to visit would be during the spring months. During this period, visitors can enjoy warm temperatures, lower wind speeds, and the least amount of rainfall. The improved weather comes with a bonus of longer sunshine hours ranging from 7.6 hours to 10.4 hours per day. Average daylight hours are maximized in May, with a 13.4 hour-long day serving as an ideal setting for outdoor activities.

The worst time to visit Brownsville

Conversely, September could be considered the most challenging period to visit Brownsville due to its highest rainfall of 1.81" (46mm) across 14.4 days. Similarly, August's humidity surges to its highest point of 80.8%, creating potentially oppressive conditions. Moreover, the highest average temperature of 93.2°F (34°C) is observed in August, coupling hot weather with high humidity.

Spring weather in Brownsville

Spring in Brownsville is observed from March to May, during which temperatures fluctuate between 65.7°F (18.7°C) to 86.5°F (30.3°C). Rainfall is anticipated to be between 0.39 to 0.87" (22mm) during this season. Peak daylight hours stretch up to 13.4 hours, supporting extended outdoor activities. Average wind speeds range between 12.6mph (20.3km/h) to 12.8mph (20.6km/h), of which gusts can reach up to 18mph (29km/h).

Summer weather in Brownsville

Witnessing some of the highest temperatures of the year, summer in Brownsville commences in June and concludes in August. Average temperatures soar from 90.5°F (32.5°C) to 93.2°F (34°C) during these months. Rainfall volume ranges from 0.75" (19mm) to 1.34" (34mm). Sunshine hours are at a high during this season, averaging between 10.9 to 11.2 hours per day, whilst daylight can last up to 13.7 hours.

Autumn weather in Brownsville

From September to November, Brownsville experiences Autumn. The season begins with the highest rainfall volume of the year at 1.81" (46mm) in September, which gradually diminishes to 0.83" (21mm) by November. Average temperatures fall from 89.4°F (31.9°C) to 76.3°F (24.6°C), while daylight hours decrease from 12.3 to 10.9 hours.

Winter weather in Brownsville

Winter settles into Brownsville from December through February. Despite being the coldest season, average high temperatures remain mild, rising from 68.9°F (20.5°C) to 72.9°F (22.7°C). Average low temperatures fluctuate between 59.9°F (15.5°C) and 61°F (16.1°C). Rainfall is at its least during winter, with recorded averages falling between 0.63" (16mm) to 0.87" (22mm). The brightness of the sun lasts 6.1 hours a day in December, reaching up to almost 7 hours by February. With less than 11.3 hours of daylight during Winter, it is the season with the shortest days. Lastly, the average wind speed ranges from 11.2mph (18km/h) to 12.2mph (19.6km/h) with gusts reaching up to 17.7mph (28.5km/h).

Weather in January

January in Brownsville, Texas, starts on a relatively mild note, frequently covered by partly cloudy skies. The early year winds blow at 11.2mph (18km/h), ushering in a fair precipitation. The visibility holds steady at 6 miles, creating a good balance between daylight and average cloud percentage. Weather in January »

Weather in February

As Brownsville moves into February, the temperatures take a slight increase, bringing a hint of the spring warmth due soon. The daylight also increases, which pairs well with the current temperatures. Amidst this early warmth, rainfall drops to a mere 0.39" (10mm), signalling the lowest rain level of the year. Weather in February »

Weather in March

March in Brownsville is witness to a consistent increase of daylight to 12 hours. The strengthening sun noticeably boosts the UV index to 6, indicating the subtle transition towards the brighter half of the year. Temperatures in March lie between 65.7°F (18.7°C) and 77.2°F (25.1°C), creating a comfortable atmosphere for the locals. Weather in March »

Weather in April

As April dawns in Brownsville, daylight duration stretches to nearly 13 hours. The weather is stabilizing with less cloud cover and steady pressures. It is during this time that winds blow at a rate of 12.8mph (20.6km/h), the year's highest, adding a tinge of coolness to the warming atmosphere. Weather in April »

Weather in May

With the advent of May in Brownsville, the city starts experiencing true summer vibes. The increase in daylight pairs well with the rising temperatures, resulting in longer, brighter days. The tropic warmth elevates the temperatures to peak at 86.5°F (30.3°C), signalling the onset of the hot season. Weather in May »

Weather in June

June in Brownsville, Texas, is right in the heart of summer with the weather characteristics being perfectly aligned to the season's persona. Bright sunshine dominates the day for almost 14 hours, defying the slightly increased cloud cover to keep the skies clear enough. Weather in June »

Weather in July

As July arrives in Brownsville, the city experiences its highest temperatures with a typical scale stretching from 79.5°F (26.4°C) to 92.1°F (33.4°C). The average number of daylight hours are steady, but the sunshine hours experience a slight dip. Weather in July »

Weather in August

August in Brownsville exhibits all the characteristics of a hot summer month, with an average high temperature soaring up to 93.2°F (34°C). The city witnesses almost 13 hours of daylight, ensuring that the summertime festivities continue in full swing. Weather in August »

Weather in September

In Brownsville, September brings a gradual respite from summer heat with temperatures starting their return journey towards annual mean values. Rainfall picks up pace, accumulating to 1.81" (46mm) - the highest in the year, making the weather a mix of wet and hot sensation. Weather in September »

Weather in October

October in Brownsville kicks off the fall season, observing the decline of the usual summer characteristics. A noticeable drop in temperature instigates crisp mornings and mild afternoons. The pressure starts rising, creating a tangible shift in the atmosphere. Weather in October »

Weather in November

November introduces Brownsville to the early signs of winter. Despite the drop in temperatures, which hover between 65.3°F (18.5°C) to 76.3°F (24.6°C), the weather remains charming for outdoor activities. The declining daylight hours and shortened sunshine hours signify the shortening of day length. Weather in November »

Weather in December

December marks the beginning of the winter season in Brownsville. The weather in this month is characterized by cooler temperatures, which fluctuate between 59.9°F (15.5°C) and 70.7°F (21.5°C). The city observes its darkest days with the shortest daylight hours. Weather in December »