Winter
Dec → Feb5 to 8°
nights -5 to -2°
- 7 rainy days · 62 mm
When is the best time to visit St. Louis?
- Jan5°not recommended
- Feb8°not recommended
- Mar14°fair
- Apr20°recommended
- May25°recommended
- Jun30°recommended
- Jul32°fair
- Aug31°fair
- Sep27°recommended
- Oct21°recommended
- Nov13°fair
- Dec7°not recommended
RecommendedFairNot recommended· afternoon temperature
The weather in St. Louis, month by month
The table of averages, month by month
| Month | High | Low | Rainfall | Rainy days | Best |
|---|---|---|---|---|---|
| January | 5° | -5° | 66 mm | 7 d | |
| February | 8° | -2° | 57 mm | 6 d | |
| March | 14° | 3° | 89 mm | 8 d | |
| April | 20° | 8° | 120 mm | 9 d | ✓ |
| May | 25° | 14° | 122 mm | 10 d | ✓ |
| June | 30° | 20° | 114 mm | 8 d | ✓ |
| July | 32° | 22° | 100 mm | 7 d | |
| August | 31° | 21° | 86 mm | 7 d | |
| September | 27° | 16° | 75 mm | 6 d | ✓ |
| October | 21° | 10° | 80 mm | 7 d | ✓ |
| November | 13° | 3° | 87 mm | 7 d | |
| December | 7° | -2° | 64 mm | 7 d |
The four seasons in St. Louis, in figures
What the 2015-2024 averages (St. Louis Lambert Airport) show, season by season, to compare at a glance instead of reading twelve rows of a table.
Spring
Mar → May14 to 25°
nights 3 to 14°
- 9 rainy days · 110 mm
Summer
Jun → Aug30 to 32°
nights 20 to 22°
- 7 rainy days · 100 mm
Autumn
Sep → Nov13 to 27°
nights 3 to 16°
- 7 rainy days · 81 mm
Book early for April to June and September to October
The timing is right, so it is right for everyone: in these months the best places to stay and the small-group tours go first. Here is where to start.
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Daylight in St. Louis, month by month
The time between sunrise and sunset, from shortest to longest. Not to be confused with the sunshine hours in the table above, which count clear skies. In June there are 14h52 of daylight, in December 9h28, a difference of 5h24.
9h44Jan
10h42Feb
11h50Mar
13h10Apr
14h16May
14h52Jun
14h37Jul
13h40Aug
12h23Sep
11h06Oct
10hNov
9h28Dec
Calculated for the latitude of the reference point "St. Louis Lambert Airport" (38.75°). Values on the 15th of each month, local solar time.
What to do in St. Louis, month by month
What to see and do
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sightseeing & walks | ||||||||||||
| Long days |
favourablewith compromisesunfavourable
- Sightseeing & walks: February, March, April, May, June, August, September, October, November
- Long days: May, June, July
Grid derived from the climate averages (temperature, rainfall), not from an opinion.
Travelling off-peak
Month by month, in detail
January
Not recommended5°-5° at night
- 66 mm · 7 d
Low season, lower prices
February
Not recommended8°-2° at night
- 57 mm · 6 d
Low season, lower prices
March
Fair14°3° at night
- 89 mm · 8 d
Low season, lower prices
April
Recommended20°8° at night
- 120 mm · 9 d
Busy, without the crush
May
Recommended25°14° at night
- 122 mm · 10 d
Busy, without the crush
June
Recommended30°20° at night
- 114 mm · 8 d
Busy, without the crush
July
Fair32°22° at night
- 100 mm · 7 d
Busy, without the crush
August
Fair31°21° at night
- 86 mm · 7 d
Busy, without the crush
September
Recommended27°16° at night
- 75 mm · 6 d
Busy, without the crush
October
Recommended21°10° at night
- 80 mm · 7 d
Busy, without the crush
November
Fair13°3° at night
- 87 mm · 7 d
Low season, lower prices
December
Not recommended7°-2° at night
- 64 mm · 7 d
Quiet, then the holidays
Read the twelve months in detail
January. Deep winter: 5 °C at the warmest of the day, -5 °C at night. Rain stays light: 66 mm over 7 days. Low season: fewer people, lower prices.
February. Cool: 8 °C at best, -2 °C at night. Rain stays light: 57 mm over 6 days. Low season: fewer people, lower prices.
March. Cool: 14 °C at best, 3 °C at night. Expect 8 days of rain in the month (89 mm). Low season: fewer people, lower prices.
April. Mild, 20 °C in the afternoon and 8 °C early in the morning. Expect 9 days of rain in the month (120 mm). Busy season, without the crush.
May. 25 °C in the afternoon and 14 °C at night. Expect 10 days of rain in the month (122 mm). Busy season, without the crush.
June. 30 °C in the afternoon and 20 °C at night. Expect 8 days of rain in the month (114 mm). Busy season, without the crush.
July. Real heat: 32 °C at the warmest of the day, 22 °C at night. Rain stays light: 100 mm over 7 days. Busy season, without the crush.
August. 31 °C in the afternoon and 21 °C at night. Rain stays light: 86 mm over 7 days. Busy season, without the crush.
September. 27 °C in the afternoon and 16 °C at night. Rain stays light: 75 mm over 6 days. Busy season, without the crush.
October. Mild, 21 °C in the afternoon and 10 °C early in the morning. Rain stays light: 80 mm over 7 days. Busy season, without the crush.
November. Cool: 13 °C at best, 3 °C at night. Rain stays light: 87 mm over 7 days. Low season: fewer people, lower prices.
December. Deep winter: 7 °C at the warmest of the day, -2 °C at night. Rain stays light: 64 mm over 7 days. Quiet at the start of the month, then busier as the holidays approach.
Same season, other ideas
Their best time overlaps with this one: worth comparing before you book.
Frequently asked questions
When is the best time to visit St. Louis?
April to June and September to October: over these months, average highs range from 20 to 30 °C, with 8 days of rain a month on average (2015-2024 averages, St. Louis Lambert Airport).
Which month should you avoid in St. Louis?
January: it is the wettest of the months to avoid, with 66 mm over 7 days of rain on average over 2015-2024 at the reference point (St. Louis Lambert Airport).
What is the hottest month in St. Louis?
July, with 32 °C on average in the afternoon and 22 °C at night. 2015-2024 averages (St. Louis Lambert Airport).
What is the coldest month in St. Louis?
January, with 5 °C at best during the day and -5 °C at night. 2015-2024 averages (St. Louis Lambert Airport).
What is the driest month in St. Louis?
February: 57 mm over 6 days of rain, against 122 mm in May, the wettest month.
Does it get cold at night in St. Louis?
The gap between day and night reaches 12 °C in April: 20 °C in the afternoon, 8 °C at dawn. Pack an extra layer, even in high season.
Plan this trip
📒 The free printable St. Louis guide: itinerary, map, where to sleep→
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Photos: Dougtone / CC BY-SA 2.0 (Wikimedia Commons) · Jon DeJong / CC BY 2.0 (Wikimedia Commons) · AmyBautz / CC BY-SA 3.0 (Wikimedia Commons) · Auteur inconnu / CC BY-SA 3.0 (Wikimedia Commons) · Warren LeMay from Cincinnati, OH, United States / CC0 (Wikimedia Commons) · ajay_suresh / CC BY 2.0 (Wikimedia Commons) · Nheyob / CC BY-SA 3.0 (Wikimedia Commons) · Pp391 / CC BY-SA 3.0 (Wikimedia Commons) · Paul Sableman / CC BY 2.0 (Wikimedia Commons)