Weather in La Unión by month: what to expect

La Unión enjoys a mild climate with distinct seasonal shifts, making it a year-round destination with something different each season. Summers here are warm, with January and February bringing the highest temperatures, often reaching +28.5 °C. Winters are cooler but rarely harsh, with July averaging +10.7 °C—a pleasant contrast to the summer heat.

Rainfall in La Unión varies throughout the year, with the wettest months falling in March and February, while June is the driest. Travelers can expect a mix of sunny and overcast days, with the most stable weather typically occurring in November and December, when temperatures are mild and rainfall moderate.

Temperatures in La Unión follow a clear seasonal pattern, with warm summers and cool winters. From December to February, daytime highs hover around +26...+28.5 °C, while nights remain comfortable at +17...+19 °C. By March, the heat begins to ease, and by May, temperatures drop to +14 °C on average, with nights cooling further to +10.5 °C.

Winter in La Unión spans June to August, with average temperatures ranging from +10.7 °C to +11.9 °C. While frosts are rare, the coolest nights in July can dip to +6.9 °C. By September, temperatures start climbing again, reaching +14.2 °C, and by November, the warmth of summer begins to return, with averages around +19.9 °C.

Rainfall in La Unión is spread unevenly across the year, with the heaviest downpours occurring in March (124.4 mm) and February (107.5 mm). These months can bring frequent showers, though they rarely disrupt travel plans for long. The driest period is June, with just 36.4 mm of rain, offering the most reliable weather for outdoor activities.

From April to October, rainfall in La Unión remains moderate, with monthly totals between 52.8 mm and 87.8 mm. November and December see a slight increase in precipitation, but showers are usually brief. Travelers visiting during the wetter months should pack light rain gear, though prolonged storms are uncommon.

For a trip to La Unión in summer (December to February), lightweight clothing is essential, along with sun protection like hats and sunscreen. Evenings can be mild, so a light jacket or shawl is useful. If visiting in March or April, a compact umbrella or waterproof layer will help with occasional rain.

Winter travelers (June to August) should pack layers, including a warm sweater or fleece for cooler evenings. While daytime temperatures are comfortable, nights can feel chilly, especially in July. For spring (September to November) or autumn (April to May), a mix of light and medium-weight clothing works best, with a waterproof option for unexpected showers.