Best time to visit St. Louis
The best time to visit St. Louis is September–October, judged on twenty years of weather records and the events worth going for.
St. Louis, Missouri, United States
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 4.3 °C / 40 °F | -4.2 °C / 24 °F | 66 mm / 2.6 in | neither best nor good |
| February | 6.5 °C / 44 °F | -3.1 °C / 26 °F | 65 mm / 2.6 in | neither best nor good |
| March | 13.8 °C / 57 °F | 3.7 °C / 39 °F | 108 mm / 4.3 in | good month |
| April | 19.4 °C / 67 °F | 8.6 °C / 47 °F | 122 mm / 4.8 in | good month |
| May | 24.5 °C / 76 °F | 14.9 °C / 59 °F | 122 mm / 4.8 in | good month |
| June | 29.7 °C / 85 °F | 20.1 °C / 68 °F | 102 mm / 4 in | neither best nor good |
| July | 30.8 °C / 87 °F | 21.6 °C / 71 °F | 102 mm / 4 in | neither best nor good |
| August | 30 °C / 86 °F | 20.2 °C / 68 °F | 85 mm / 3.3 in | neither best nor good |
| September | 27 °C / 81 °F | 15.9 °C / 61 °F | 83 mm / 3.3 in | best month |
| October | 20.2 °C / 68 °F | 9.2 °C / 49 °F | 90 mm / 3.5 in | best month |
| November | 12.9 °C / 55 °F | 3 °C / 37 °F | 78 mm / 3.1 in | good month |
| December | 7.1 °C / 45 °F | -1.3 °C / 30 °F | 71 mm / 2.8 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: good
- AApril: good
- MMay: good
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: best
- OOctober: best
- NNovember: good
- DDecember: neither
- Best
- September–October
- Good
- March–May, November
September and October are the best months to explore St. Louis on foot, with pleasant warmth and sun; spring (March-May) is good but rainy, summer (June-August) turns hot and humid, and winter (December-February) is cold and dull with frequent heavy-rain days.
Why these months
March · good
In its favour: share of daylight that is sunny 68%, average daily high 13.8 °C / 57 °F, relative humidity 64%.
Against: precipitation 108 mm / 4.3 in, wet days 11.3 days, days with heavy rain 3.8 days, feels like (high) 10.7 °C / 51 °F, average daily low 3.7 °C / 39 °F.
Also on: Mardi Gras (Soulard).
Watch out for: Easter, Good Friday.
April · good
In its favour: feels like (high) 17.4 °C / 63 °F, average daily high 19.4 °C / 67 °F, share of daylight that is sunny 70%, relative humidity 61%, average daily low 8.6 °C / 47 °F.
Against: precipitation 122 mm / 4.8 in, days with heavy rain 4.5 days, wet days 11.1 days.
Watch out for: Easter, Good Friday.
May · good
In its favour: feels like (high) 24.8 °C / 77 °F, average daily high 24.5 °C / 76 °F, share of daylight that is sunny 74%, average daily low 14.9 °C / 59 °F, relative humidity 66%.
Against: wet days 13.2 days, precipitation 122 mm / 4.8 in, days with heavy rain 4.3 days.
Also on: Cinco de Mayo festival (Cherokee Street), Shakespeare Festival St. Louis.
Watch out for: Memorial Day.
September · best
In its favour: feels like (high) 28 °C / 82 °F, share of daylight that is sunny 82%, average daily high 27 °C / 81 °F, precipitation 83 mm / 3.3 in, average daily low 15.9 °C / 61 °F, relative humidity 69%.
Against: days with heavy rain 2.4 days, wet days 8 days.
Watch out for: Labor Day.
October · best
In its favour: feels like (high) 18.4 °C / 65 °F, average daily high 20.2 °C / 68 °F, share of daylight that is sunny 74%, precipitation 90 mm / 3.5 in, average daily low 9.2 °C / 49 °F, relative humidity 67%.
Against: days with heavy rain 3.4 days, wet days 8.2 days.
Watch out for: Columbus Day, Halloween business closures.
November · good
In its favour: share of daylight that is sunny 70%, precipitation 78 mm / 3.1 in, wet days 7.7 days, relative humidity 67%.
Against: days with heavy rain 2.6 days, sunshine per day 7.1 h, feels like (high) 9.7 °C / 49 °F, average daily high 12.9 °C / 55 °F, average daily low 3 °C / 37 °F.
Watch out for: Holiday season travel crowding, Thanksgiving, Veterans Day.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Sugar Mountain Resort, 786 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 0.1 °C | 2.5 °C | 10.7 °C | 17.4 °C | 24.8 °C | 32.1 °C | 34.5 °C | 33 °C | 28 °C | 18.4 °C | 9.7 °C | 3.5 °C |
| Days with heavy rain | 2.5 days | 2.4 days | 3.8 days | 4.5 days | 4.3 days | 3.2 days | 3.4 days | 2.9 days | 2.4 days | 3.4 days | 2.6 days | 2.4 days |
| Time rain usually falls | 11 pm | 8 am | 10 pm | 7 pm | 11 pm | 5 pm | 6 pm | 3 am | 7 am | 2 pm | 7 pm | 2 am |
| Sunshine per day | 6.4 h | 7.4 h | 8.1 h | 9.2 h | 10.5 h | 12 h | 12.3 h | 11.6 h | 10.2 h | 8.3 h | 7.1 h | 5.8 h |
| Relative humidity | 70% | 66% | 64% | 61% | 66% | 66% | 69% | 70% | 69% | 67% | 67% | 72% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 9.2 µg/m³ | 9.9 µg/m³ | 8.4 µg/m³ | 8.8 µg/m³ | 11.4 µg/m³ | 16.2 µg/m³ | 14.7 µg/m³ | 12.1 µg/m³ | 10.3 µg/m³ | 7.1 µg/m³ | 7.7 µg/m³ | 7.8 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 15.4 µg/m³ | 15.8 µg/m³ | 13.9 µg/m³ | 14.7 µg/m³ | 18.3 µg/m³ | 23.8 µg/m³ | 21 µg/m³ | 18.4 µg/m³ | 16.3 µg/m³ | 11.5 µg/m³ | 13.1 µg/m³ | 13.4 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.
Events and seasons
What the weather records cannot show. A major event can lift a month to good or best. The warnings are there to help you plan, and never count against a month.
Reasons to go
- Mardi Gras (Soulard)
January, February and March, dates vary from year to year
- Cinco de Mayo festival (Cherokee Street)
1–10 May, dates vary from year to year
- Shakespeare Festival St. Louis
May and June
- Show-me Burlesque Festival
June
- The Muny outdoor musical season
June, July and August
- PrideFest
June
- Bastille Day (Soulard)
14 July
- Fourth of July Fireworks Celebration
4 July
- Festival of Nations
August
Worth knowing before you go
- New Year's Day
1 January
- Martin Luther King Jr. Day
January, dates vary from year to year
- Holiday season travel crowding
26 November–1 January, dates vary from year to year
- Presidents' Day
February, dates vary from year to year
- Good Friday
March and April, dates vary from year to year
- Easter
March and April, dates vary from year to year
- Memorial Day
May, dates vary from year to year
- Juneteenth
19 June
- Independence Day
4 July
- Labor Day
September, dates vary from year to year
- Columbus Day
October, dates vary from year to year
- Halloween business closures
31 October
- Veterans Day
11 November
- Thanksgiving
25–29 November, dates vary from year to year
- Christmas Day closures
24–25 December