Sebastian in Fall
In fall (September, October and November), Sebastian sees average daytime highs around 83°F and overnight lows near 71°F, with 11.5 in of rain over about 42 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 88°F in early September to 76°F by late November. The sky is clear or mostly clear about 27% of the time across fall, and the air most often feels oppressive.
Fall is Sebastian's 3rd-best season to visit on our travel score. For the whole year in context, see Sebastian's year-round climate.
- Avg daytime high
- 83°F
- 2nd-warmest season
- Avg overnight low
- 71°F
- Rainfall
- 11.5 in
- 42 wet days
- Avg wind
- 7 mph
- Travel score
- 5.4
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Sebastian in Fall
Over the season highs ease from about 88°F in early September to 76°F by late November.
A typical fall day in Sebastian reaches about 83°F and drops to 71°F overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Sebastian
Once humidity and wind are folded in, fall brings about 37 days that feel above 90°F and 0 that feel at or below 32°F.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Sebastian weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 72° / 57° | 2.0 | 6.9 | 10.4 | 7.2 |
| Feb | 74° / 58° | 1.7 | 7 | 11 | 7.4 |
| Mar | 78° / 62° | 2.2 | 7.6 | 11.8 | 7.3 |
| Apr | 82° / 67° | 2.1 | 7.7 | 12.6 | 6.6 |
| May | 85° / 72° | 3.2 | 11.3 | 13.4 | 5.1 |
| Jun | 88° / 75° | 7.2 | 21.4 | 13.7 | 3.2 |
| Jul | 89° / 77° | 6.7 | 23.2 | 13.6 | 2.8 |
| Aug | 89° / 77° | 7.2 | 24.9 | 13 | 2.7 |
| Sep | 87° / 76° | 6.2 | 21.4 | 12.2 | 3.4 |
| Oct | 83° / 72° | 3.7 | 12.7 | 11.3 | 5.5 |
| Nov | 78° / 65° | 1.6 | 7.5 | 10.6 | 7.2 |
| Dec | 74° / 60° | 1.5 | 5.6 | 10.3 | 7.5 |
Cloud cover in Fall
The sky is clear or mostly clear about 27% of the time across fall.
Chance of precipitation in Fall
Sebastian gets around 11.5 in of rain over 42 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 7 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 36 min in early September to 10 h 24 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.2 kWh/m².
Hazard calendar for Sebastian
In fall, Sebastian overlaps its atlantic hurricane and monsoon season. The full year is below, with each hazard's peak months called out.
Sebastian sits in the Atlantic hurricane belt; the season peaks August–October.
Sebastian's monsoon runs June–October, when most of the year's rain falls.
Is fall a good time to visit Sebastian?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Sebastian for sightseeing.
What to pack for Sebastian in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Sebastian sees daytime highs around 83°F and nights near 71°F. Pack light clothes and rain gear. Worth having: sun protection. About 42 days see rain.
Sea temperature near Sebastian in Fall
The nearest coast averages about 80°F across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 83°F and coldest in February near 70°F.
The water stays above 68°F all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 70 | 70 | 71 | 74 | 77 | 80 | 82 | 82 | 83 | 81 | 76 | 73 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Warm | Warm | Warm | Warm | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 70 | Refreshing |
| Feb | 70 | Refreshing |
| Mar | 71 | Refreshing |
| Apr | 74 | Refreshing |
| May | 77 | Warm |
| Jun | 80 | Warm |
| Jul | 82 | Warm |
| Aug | 82 | Warm |
| Sep | 83 | Tropical |
| Oct | 81 | Warm |
| Nov | 76 | Warm |
| Dec | 73 | Refreshing |
UV index in Sebastian in Fall
Clear-sky midday UV across fall averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sebastian peaks around July 14 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 7 | 9 | 8 | 10 | 11 | 11 | 10 | 9 | 7 | 5 | 4 |
| Level | Moderate | High | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 7 | High |
| Mar | 9 | Very high |
| Apr | 8 | Very high |
| May | 10 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 9 | Very high |
| Oct | 7 | Very high |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Air quality in Sebastian in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Sebastian is worst in July — around 17 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 6 | 7 | 9 | 10 | 10 | 14 | 17 | 15 | 10 | 8 | 6 | 6 |
| Level | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 7 | Good |
| Mar | 9 | Good |
| Apr | 10 | Good |
| May | 10 | Good |
| Jun | 14 | Moderate |
| Jul | 17 | Moderate |
| Aug | 15 | Moderate |
| Sep | 10 | Good |
| Oct | 8 | Good |
| Nov | 6 | Good |
| Dec | 6 | Good |
Where is Sebastian?
Sebastian sits at 27.8°N, 80.5°W, 20 ft above sea level, in United States. The nearest listed city is Vero Beach, 13 mi away.
Topography around Sebastian
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Sebastian.
Within 2 miles, the terrain around Sebastian has only modest variations in elevation — a maximum elevation change of 43 ft around an average of 13 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 82 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 246 ft.
The land around Sebastian is covered by water (44%) and trees (28%) within 2 miles, water (45%), trees (28%) and grassland (21%) within 10 miles, and water (37%), grassland (32%) and trees (25%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sebastian (27.8164°, -80.4706°, elevation 20 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.