Cultural events—film and music festivals, and fashion and art exhibits—usually take place between April and December. In South American summer (from January through March) the weather is rainy, and floods can disrupt traffic. Be sure to make reservations for beach resorts as far in advance as possible, particularly for weekend stays. In winter (June and July), follow the same rule for visits to Campos do Jordão. Summers are hot—35°C (95°F). In winter temperatures rarely dip below 10°C (50°F). The air pollution might irritate your eyes, especially in July and August (dirty air is held in the city by thermal inversions), so pack eyedrops.