Rosário-Lagoa Weather in December

December in Rosário-Lagoa typically sees daytime highs of 18°C (64°F) and nighttime lows of 15°C (59°F). As the wettest month of the year, expect more rainfall than other months.

Rainfall in Rosário-Lagoa in December

With frequent rain showers this month, having an umbrella on hand will keep you dry. Rain is expected on roughly 20 days, totalling around 147 mm (5.8 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Rosário-Lagoa in December

Temperatures in Rosário-Lagoa in December top out at 18°C (64°F) and drop to 15°C (59°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 15°C (59°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Rosário-Lagoa in December

The city usually sees around 94 hours of sunlight, indicating fewer sunny days.

Average water temperature in December

At 19°C (66°F), the water is getting there, comfortable enough for most swimmers, though those used to warmer seas may still find it a touch cool.

If you prefer enjoying temperate temperatures and rain-free days, June, July, August and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.