AI-generatedSt. Louis at a glance
- Best time
- Apr – May, Sep – Oct
- Warmest month
- Jul · 31°
- Sunshine a year
- 2,290 h
- Rain a year
- 1,080 mm
- Climate
- Continental
- Time zone
- UTC−6 / UTC−5
- Elevation
- 142 m
Climate in St. Louis
St. Louis has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 31 °C, while January is the coolest at 4 °C. With around 2,290 hours of sunshine a year, St. Louis is sunny; July is the sunniest month with 8.6 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Excellent
Best time to visit: April – May, September – October
October is the peak of the hurricane season
Good forSightseeing & walks
Keep in mindStorm season
A typical day in October
- Morning, 08:00: about 12°
- Midday, 13:00: about 20°
- Afternoon, 16:00: about 20°
- Evening, 20:00: about 16°
- Night, 23:00: about 14°
07:0918:24
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:52–07:44 · evening 17:48–18:41
- Blue hour
- Morning 06:42–06:52 · evening 18:41–18:51
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in St. Louis in October?
In October, St. Louis is mild: daytime highs average 20 °C, and nights cool down to about 11 °C. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 89 mm. All in all, October is an excellent month for a holiday in St. Louis.
More details for October
- Daylight
- 11 h 16 min07:09 – 18:24
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 47 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−5America/Chicago
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %50 %
- Few rainy daysweight 30 %72 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- A jumper for the evenings
Sunshine hours in St. Louis
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 6.0 of 11.3 hours of daylight in St. Louis, 53 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in St. Louis
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 4 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 30 min
- Fair skin
- about 40 min
- Light brown skin
- about 55 min
- Olive skin
- about 70 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in St. Louis: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, St. Louis has about 8 rainy days with 89 mm of rain in total.
Wind and clouds in St. Louis
How breezy and how cloudy St. Louis is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in St. Louis typically peaks at 17 km/h during the day: Beaufort 3, light breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 47 % of the sky over St. Louis: variable cloud, with about 6.0 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in St. Louis
How often the day gets hot in St. Louis (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, St. Louis has about 1 hot days, with an average daytime high of 20 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow in St. Louis
Snow is possible in St. Louis, but no month makes it likely: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in St. Louis.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in St. Louis
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- muggy month (10+ muggy days)
CoolOctober: nights around 11°. A duvet at night and a jumper for the evening. Muggy on about 1 days (dew point 18 °C or more).
The coolest nights are in January (−4°), the warmest in July (22°). Tropical nights of 20 °C and more are the rule from June to August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in May and in September. Nights fall below 8 °C on average from November to March, so the room should be heated. It is muggy (dew point 18 °C or more) on about 71 days a year, mostly from June to August.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 26 | 4° | −4° | 4.4 h | 8 | 73 |
| FebruaryFeb | 28 | 7° | −3° | 4.9 h | 8 | 65 |
| MarchMar | 50 | 13° | 3° | 5.6 h | 11 | 105 |
| AprilApr | 77 | 19° | 9° | 6.6 h | 11 | 115 |
| MayMay | 73 | 24° | 15° | 7.0 h | 14 | 126 |
| JuneJun | 68 | 29° | 20° | 8.2 h | 11 | 104 |
| JulyJul | 59 | 31° | 22° | 8.6 h | 10 | 91 |
| AugustAug | 65 | 30° | 21° | 8.0 h | 9 | 77 |
| SeptemberSep | 86 | 27° | 17° | 7.1 h | 7 | 81 |
| OctoberOct | 82 | 20° | 11° | 6.0 h | 8 | 89 |
| NovemberNov | 51 | 13° | 4° | 4.9 h | 8 | 83 |
| DecemberDec | 23 | 7° | −1° | 4.0 h | 9 | 71 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
38.63° N, 90.20° W · 142 m · America/Chicago
Best time to visit St. Louis
The best time to visit St. Louis is from April to May and from September to October. For sightseeing, day trips and hiking, conditions are most comfortable in April and from September to October. The wettest month is May with 126 mm of precipitation.
St. Louis through the seasons
How the weather changes over the seasons, with averages for each.
St. Louis in spring
Mar – May
Good
- 13–24 °C by day
- 6 h of sun a day
- 36 rainy days in all
St. Louis in summer
Jun – Aug
Good
- 29–31 °C by day
- 8 h of sun a day
- 30 rainy days in all
St. Louis in autumn
Sep – Nov
Good
- 13–27 °C by day
- 6 h of sun a day
- 23 rainy days in all
St. Louis in winter
Dec – Feb
Poor
- 4–7 °C by day
- 4 h of sun a day
- 25 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in St. Louis for you.
Your best months: May, September – October
Based on the climate averages; tap a month to see its details.
Compare two months in St. Louis
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
October and September bring similar holiday weather to St. Louis (score 82 and 86). In September, days are 7 °C warmer than in October. September has one rainy day fewer. The sun shines an hour longer a day in September.
| Month | October | September |
|---|---|---|
| Weather score | 82 | 86better |
| Day high | 20° | 27° |
| Night low | 11° | 17° |
| Sunshine | 6.0 h | 7.1 hbetter |
| Rainy days | 8 | 7better |
| Rainfall | 89 mm | 81 mm |
| Muggy days | 1better | 8 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr, Sep – Oct
15–28 °C and not too much rain
Rainy months
May
12 or more rainy days
Snow
Jan – Feb
Snow on 2 or more days
St. Louis month by month
The typical weather for every month at a glance.
26January4° · 4 h
In January, St. Louis is cold: daytime highs average 4 °C, and nights often drop below freezing (−4 °C). Expect around 4 hours of sunshine a day. Rain falls on about 8 days, adding up to 73 mm. Snow falls on about 2 days. All in all, January is not an ideal month for a holiday in St. Louis.
St. Louis in January28February7° · 5 h
In February, St. Louis is cold: daytime highs average 7 °C, and nights often drop below freezing (−3 °C). Expect around 5 hours of sunshine a day. Rain falls on about 8 days, adding up to 65 mm. Snow falls on about 2 days. All in all, February is not an ideal month for a holiday in St. Louis.
St. Louis in February50March13° · 6 h
In March, St. Louis is cool: daytime highs average 13 °C, and nights cool down to about 3 °C. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 105 mm in total. All in all, March is a so-so month for a holiday in St. Louis.
St. Louis in March77April19° · 7 h
In April, St. Louis is mild: daytime highs average 19 °C, and nights cool down to about 9 °C. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 115 mm in total. All in all, April is a good month for a holiday in St. Louis.
St. Louis in April73May24° · 7 h
In May, St. Louis is warm: daytime highs average 24 °C, and nights cool down to about 15 °C. The sun shines for around 7 hours a day. Rain is frequent, with about 14 rainy days and 126 mm in total. All in all, May is a good month for a holiday in St. Louis.
St. Louis in May68June29° · 8 h
In June, St. Louis is hot: daytime highs average 29 °C, and nights cool down to about 20 °C. The sun shines for around 8 hours a day. Rain is frequent, with about 11 rainy days and 104 mm in total. On about 14 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, June is a good month for a holiday in St. Louis.
St. Louis in June59July31° · 9 h
In July, St. Louis is hot: daytime highs average 31 °C, and even at night it stays warm at around 22 °C. The sun shines for around 9 hours a day. Rain is frequent, with about 10 rainy days and 91 mm in total. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a so-so month for a holiday in St. Louis.
St. Louis in July65August30° · 8 h
In August, St. Louis is hot: daytime highs average 30 °C, and even at night it stays warm at around 21 °C. The sun shines for around 8 hours a day. Rain is frequent, with about 9 rainy days and 77 mm in total. On about 17 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a good month for a holiday in St. Louis.
St. Louis in August86September27° · 7 h
In September, St. Louis is warm: daytime highs average 27 °C, and nights cool down to about 17 °C. The sun shines for around 7 hours a day. Rain falls on about 7 days, adding up to 81 mm. On about 7 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in St. Louis.
St. Louis in September82October20° · 6 h
In October, St. Louis is mild: daytime highs average 20 °C, and nights cool down to about 11 °C. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 89 mm. All in all, October is an excellent month for a holiday in St. Louis.
St. Louis in October51November13° · 5 h
In November, St. Louis is cool: daytime highs average 13 °C, and nights cool down to about 4 °C. Expect around 5 hours of sunshine a day. Rain falls on about 8 days, adding up to 83 mm. All in all, November is a so-so month for a holiday in St. Louis.
St. Louis in November23December7° · 4 h
In December, St. Louis is cold: daytime highs average 7 °C, and nights often drop below freezing (−1 °C). Expect around 4 hours of sunshine a day. Rain falls on about 9 days, adding up to 71 mm. Snow falls on about 2 days. All in all, December is not an ideal month for a holiday in St. Louis.
St. Louis in DecemberSt. Louis compared
Put St. Louis side by side with another destination.
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St. Louis vs. Indianapolis
In October the holiday weather in St. Louis and Indianapolis is about equally good (score 82 vs. 78). During the day Indianapolis is 2 °C cooler than St. Louis. Indianapolis gets one hour less sunshine a day.
| in October | St. Louis | Indianapolis |
|---|---|---|
| Holiday score | 82 | 78 |
| Daytime high | 20° | 18° |
| Sunshine | 6 h | 5 h |
| Rainy days | 8 | 9 |
| Best time | Apr – May, Sep – Oct | May – Jun, Aug – Oct |
Through the year
USA in October: the best places
In October, St. Louis ranks 14 among the 31 nearest destinations in this country.
- Panama City Beach25°26°90
- 2Destin26°26°89
- 3Mobile26°25°87
- 4Oklahoma City23°86
- 5Baton Rouge26°86
- 6Fort Worth26°86
- 7Atlanta22°85
- 8Greenville22°85
- 14St. LouisThis page20°82
Planning a trip to St. Louis
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
St. Louis in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
St. Louis has its best school-holiday weather during October half-term (score 82) and its weakest during the Christmas holidays (score 25).
- 69
Easter holidays
Mar – Apr
Good
- 18 °C by day
- 6.3 h of sun a day
- 11 rainy days a month
- 72
May half-term
May – Jun
Good
- 25 °C by day
- 7.2 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain
- 63
Summer holidays
Jul – Aug
Good
- 31 °C by day
- 8.2 h of sun a day
- 9 rainy days a month
Keep in mind: Storm season
- 82
October half-term
Oct
ExcellentBest holidays
- 20 °C by day
- 6.0 h of sun a day
- 8 rainy days a month
Good for: Sightseeing & walks
Keep in mind: Storm season
- 25
Christmas holidays
Dec – Jan
Poor
- 6 °C by day
- 4.2 h of sun a day
- 8 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 8 h 35 min
- Distance
- 6,740 km
- Time zone
- UTC−5
- Jet lag
- About 4 days (6 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
St. Louis lies in an area that Atlantic hurricanes can reach. The hurricane season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM); not a forecast.
Frequently asked questions about St. Louis
When is the best time to visit St. Louis?
The best time to visit St. Louis is from April to May and from September to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in St. Louis?
July is the warmest month, with average highs of 31 °C and nights around 22 °C. January is the coolest month at 4 °C.
When does it rain most in St. Louis?
The wettest month is May with 126 mm of precipitation. The driest month is February with 65 mm.
How many hours of sunshine does St. Louis get?
St. Louis gets around 2,290 hours of sunshine a year. The sunniest month is July with 8.6 hours a day; in December there are 4.0 hours a day.
What time zone is St. Louis in?
St. Louis uses the time zone America/Chicago: UTC−6 in January and UTC−5 in July.
How long is the flight from London to St. Louis?
A nonstop flight from London to St. Louis takes about 8 h 35 min, for a straight-line distance of about 6,740 km.
When is hurricane season in St. Louis?
St. Louis lies in an area that Atlantic hurricanes can reach. The hurricane season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for St. Louis?
St. Louis has its best school-holiday weather during October half-term (score 82) and its weakest during the Christmas holidays (score 25). Holiday ratings (0–100): Easter holidays 69, May half-term 72, Summer holidays 63, October half-term 82, Christmas holidays 25.
Near St. Louis
Other destinations close by.
Places with a climate like St. Louis
Destinations whose weather through the year is closest to St. Louis's – good alternatives.