St. Louis, MO weather in October
In October, St. Louis sees highs around 69°F and lows around 49°F: mild, with some rain. Expect about 9 wet days. Good for outdoor plans.
- Normal high
- 69°F
- Normal low
- 49°F
- Wet days
- 9
- 3.1 in total
- Muggy days
- 1
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 75°F | 63°F |
| Normal low | 55°F | 43°F |
| Chance of a wet day | 25% | 29% |
| Sunrise / sunset | 6:56 am / 6:44 pm | 7:26 am / 6:02 pm |
| Daylight | 11.8 h | 10.6 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical October day
- 6 am52°Fdew point 46°F
- 9 am58°Fdew point 47°F
- Noon65°Fdew point 46°F
- 3 pm67°Fdew point 46°F
- 6 pm62°Fdew point 46°F
- 9 pm58°Fdew point 46°F
NOAA hourly normals (local standard time) from St Louis Lambert Intl Airport (13 mi away); average wind 8 mph; clear or few clouds in 39% of daytime hours, mostly cloudy or overcast in 45%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F14 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more1 of 31
- Wet daysat least 0.01 in of rain or melted snow9 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below1 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain in October
Normal precipitation is 3.1 in; a dry October brings about 2.0 in and a wet one about 3.7 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How October varies from year to year
- Warmest October, 1991-20202016: average high 75°F
- Coolest October2009: average high 61°F
- Wettest October2009: 12.4 in
- Driest October2015: 1.0 in
- Highest reading94°F (October 1, 2019)
- Lowest reading29°F (October 28, 2008)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 81°F | 69°F | 56°F |
| Normal low | 61°F | 49°F | 37°F |
| Wet days | 7 | 9 | 9 |
| Comfortable days | 10 | 14 | 7 |
| Daylight | 12.4 h | 11.2 h | 10.1 h |
Highs change by -12°F from September and -13°F into November.
Nearby alternatives in October
- Warmer: Memphis, TN240 mi · high 75°F · 8 wet days
- Cooler: Joliet, IL229 mi · high 63°F · 10 wet days
How St. Louis ranks in October
- Normal high204th warmest of 378 cities; 3rd of 7 in Missouri
- Wet days229th driest of 378
- Comfortable days116th most of 340
What to pack for St. Louis in October
- A rain jacket or umbrella – rain on about 9 days
Frost in October
The first fall frost typically comes around Oct 26; in 1 year in 10 it comes before Oct 12. All frost dates for St. Louis.
Heating and cooling
October has 229 heating degree days and 48 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How cold is St. Louis in October?
The normal high is 69°F and the normal low is 49°F. From 1991 to 2020 the coldest October reading was 29°F (most recently on October 28, 2008).
Does it rain a lot in St. Louis in October?
About 9 days in October have at least 0.01 in of precipitation, and the normal total is 3.2 in. The wettest October in 1991-2020 was in 2009 (12.4 in); the driest was in 2015 (1.0 in).
Is October a good time to visit St. Louis?
October ranks 3rd of 12 months on our comfort score for St. Louis (63 out of 100). It has about 14 comfortable days. The best months are April and May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, humidity and wind by hour and cloud cover: St Louis Lambert Intl Airport (USW00013994), 13 mi NW of the city center, 531 ft (67 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Cahokia St Louis Airport (USW00003960), 4.4 mi SSE of the city center, 413 ft (51 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Lambert-St Louis International Airport (724340-13994), 13 mi NW of the city center, 531 ft (67 ft higher than the city). Hourly observations, 1991-2020.