Climate Insights for St. Louis

The climate in St. Louis is cold. The average annual temperature is 2°C and approximately 467 mm of precipitation falls per year. June is the wettest month, receiving around 87 mm of rainfall. St. Louis is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are February, January, December, when temperatures can drop to -20°C. Snowfall occurs from January to December, with around 131cm accumulating over the season.The climate in St. Louis is cold. The average annual temperature is 36°F and approximately 18.4 in of precipitation falls per year. June is the wettest month, receiving around 3.4 in of rainfall. St. Louis is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are February, January, December, when temperatures can drop to -4°F. Snowfall occurs from January to December, with around 52in accumulating over the season.

St. Louis has a wide annual temperature range, spanning 45°C from the coldest to warmest months. The warmest month is July, when average highs reach 25°C and the mean temperature sits around 18°C. February brings the harshest conditions, with lows dropping to -20°C and an average temperature of -15°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 10°C shift in average temperatures.St. Louis has a wide annual temperature range, spanning 81°F from the coldest to warmest months. The warmest month is July, when average highs reach 77°F and the mean temperature sits around 65°F. February brings the harshest conditions, with lows dropping to -4°F and an average temperature of 4°F. On average, daily temperatures fluctuate by about 20°F between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 18°F shift in average temperatures.

St. Louis is a relatively dry area, receiving approximately 467 mm of precipitation annually, which averages out to around 39 mm per month. The wettest month is June, averaging 87 mm of rainfall. July and August also tend to see above-average precipitation. The driest month is February, with just 13 mm. That's 74 mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 131cm accumulating over the season. November typically sees the most snow at around 29cm.St. Louis is a relatively dry area, receiving approximately 18.4 in of precipitation annually, which averages out to around 1.5 in per month. The wettest month is June, averaging 3.4 in of rainfall. July and August also tend to see above-average precipitation. The driest month is February, with just 0.5 in. That's 2.9 in less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 52in accumulating over the season. November typically sees the most snow at around 12in.

St. Louis is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.St. Louis is moderately windy, with an average annual wind speed of 8mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is April, averaging 9mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 7mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2mph between the calmest and windiest months.

The best time to visit St. Louis is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 72 mm per month. By contrast, February can be quite cold with temperatures dropping to -20°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.The best time to visit St. Louis is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 63°F with modest rainfall averaging 2.8 in per month. By contrast, February can be quite cold with temperatures dropping to -4°F. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for St. Louis based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for St. Louis based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in inches (in) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.