Historical weather data, all-time temperature records, and monthly climate averages for Sebastian, FL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Sebastian runs warm and mostly dry — expect a high around 80° with just a 21% chance of rain. The date has seen wild swings over 68 years of records, from a scorching 91° in 2017 down to a jaw-dropping 36° back in 1987.
Sebastian's weather has some teeth: the mercury has climbed as high as 102° (June 2009) and crashed as low as 21° (January 1985). The wettest single day on record dropped a staggering 11.22 inches in May 2016 — a reminder that Florida's rain can arrive in buckets.
Sebastian is a warm destination year-round, with highs never dipping below the low 70s even in the dead of winter. Peak heat arrives in July and August, when average highs hit 90-91°, while late September is your best bet for avoiding the rain, though it's statistically the wettest stretch of the year at around 2 inches per week.