St. Louis in Fall
In fall (September, October and November), St. Louis sees average daytime highs around 67°F and overnight lows near 48°F, with 10.4 in of precipitation over about 25 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 84°F in early September to 49°F by late November. The sky is clear or mostly clear about 43% of the time across fall, and the air most often feels dry.
Fall is St. Louis's best season of the year to visit on our travel score. For the whole year in context, see St. Louis's year-round climate.
- Avg daytime high
- 67°F
- 2nd-warmest season
- Avg overnight low
- 48°F
- Precipitation
- 10.4 in
- 25 wet days
- Avg wind
- 7 mph
- Travel score
- 5.7
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in St. Louis in Fall
Over the season highs ease from about 84°F in early September to 49°F by late November.
A typical fall day in St. Louis reaches about 67°F and drops to 48°F overnight. The warmest of the three months is September, the coolest November.
How fall really feels in St. Louis
Once humidity and wind are folded in, fall brings about 0 days that feel above 90°F and 18 that feel at or below 32°F.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
St. Louis 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 | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 39° / 24° | 2.8 | 8.2 | 2.9 | 9.6 | 0.0 |
| Feb | 44° / 28° | 2.5 | 7.7 | 2.8 | 10.5 | 0.8 |
| Mar | 55° / 37° | 3.7 | 10.5 | 1.4 | 11.7 | 3.5 |
| Apr | 66° / 47° | 4.6 | 11.2 | 0.2 | 13 | 5.8 |
| May | 75° / 58° | 5.0 | 13.5 | 0 | 14.1 | 6.2 |
| Jun | 84° / 67° | 4.2 | 11 | 0 | 14.6 | 5.4 |
| Jul | 87° / 70° | 3.4 | 9.9 | 0 | 14.4 | 4.7 |
| Aug | 86° / 68° | 2.9 | 9.2 | 0 | 13.5 | 5.2 |
| Sep | 79° / 60° | 3.3 | 7.6 | 0 | 12.3 | 7.1 |
| Oct | 67° / 48° | 3.4 | 8.4 | 0.1 | 11 | 6.6 |
| Nov | 54° / 37° | 3.6 | 8.6 | 0.8 | 9.9 | 3.4 |
| Dec | 43° / 29° | 2.6 | 8.2 | 2.2 | 9.4 | 0.6 |
Cloud cover in Fall
The sky is clear or mostly clear about 43% of the time across fall.
Chance of precipitation in Fall
St. Louis gets around 10.4 in of rain and snow over 25 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — 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 54 min in early September to 9 h 30 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 3.5 kWh/m².
Hazard calendar for St. Louis
In fall, St. Louis overlaps its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
St. Louis sits in the Atlantic hurricane belt; the season peaks August–October.
Is fall a good time to visit St. Louis?
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 St. Louis for sightseeing.
What to pack for St. Louis in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, St. Louis sees daytime highs around 67°F and nights near 48°F. Worth packing: light clothes, a warm layer, rain gear and sun protection. About 25 days see rain.
UV index in St. Louis in Fall
Clear-sky midday UV across fall averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in St. Louis peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 7 | 8 | 9 | 9 | 8 | 7 | 4 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 4 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in St. Louis 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 St. Louis is worst in August — around 18 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 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) | 10 | 13 | 13 | 11 | 14 | 16 | 18 | 18 | 13 | 8 | 9 | 10 |
| Level | Good | Moderate | Moderate | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 13 | Moderate |
| Mar | 13 | Moderate |
| Apr | 11 | Good |
| May | 14 | Moderate |
| Jun | 16 | Moderate |
| Jul | 18 | Moderate |
| Aug | 18 | Moderate |
| Sep | 13 | Moderate |
| Oct | 8 | Good |
| Nov | 9 | Good |
| Dec | 10 | Good |
Where is St. Louis?
St. Louis sits at 38.6°N, 90.2°W, 466 ft above sea level, in United States. The nearest listed city is East Saint Louis, 2.5 mi away.
Topography around St. Louis
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of St. Louis.
Within 2 miles, the terrain around St. Louis has only modest variations in elevation — a maximum elevation change of 190 ft around an average of 463 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 397 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 981 ft.
The land around St. Louis is covered by artificial surfaces (62%) within 2 miles, trees (37%) and artificial surfaces (28%) within 10 miles, and trees (45%) and cropland (41%) 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 St. Louis (38.6273°, -90.1979°, elevation 466 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.