MO
Lake St. Louis and Troy have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Lake St. Louis | Metric | Troy |
|---|---|---|
| 203 days | Sunny daysclear or partly cloudy skies | 203 days |
| 41 in | Precipitationper year | 41 in |
| 117 days | Wet daysrain or snow per year | 116 days |
| 12 in | Snowfallper year | 14 in |
| 38 days | Hot daysabove 90 °F | 34 days |
| 104 days | Freezing nightsat or below 32 °F | 110 days |
| 69% | Humidityaverage relative | 68% |
| 56 °F | Average temperatureyear round | 54 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lake St. Louis high | 40 | 45 | 56 | 67 | 76 | 84 | 88 | 87 | 80 | 69 | 55 | 44 |
| Troy high | 38 | 44 | 55 | 67 | 75 | 84 | 87 | 86 | 79 | 68 | 54 | 42 |
| Lake St. Louis low | 21 | 25 | 34 | 44 | 54 | 64 | 67 | 65 | 57 | 45 | 35 | 26 |
| Troy low | 20 | 23 | 33 | 43 | 53 | 63 | 66 | 64 | 56 | 45 | 34 | 25 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lake St. Louis | 2.5 | 2.4 | 3.6 | 4.5 | 4.9 | 4.0 | 3.2 | 3.0 | 3.2 | 3.3 | 3.5 | 2.4 |
| Troy | 2.4 | 2.4 | 3.5 | 4.7 | 5.0 | 4.1 | 3.5 | 3.1 | 3.1 | 3.1 | 3.5 | 2.4 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lake St. Louis | 15 | 13 | 15 | 15 | 16 | 17 | 21 | 22 | 21 | 19 | 17 | 14 |
| Troy | 15 | 13 | 15 | 15 | 16 | 17 | 21 | 22 | 21 | 19 | 17 | 14 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Lake St. Louis vs another city
- Lake St. Louis vs O'Fallon, MO
- Lake St. Louis vs Dardenne Prairie, MO
- Lake St. Louis vs Wentzville, MO
- Lake St. Louis vs Cottleville, MO
- Lake St. Louis vs Weldon Spring, MO
- Lake St. Louis vs St. Peters, MO
- Lake St. Louis vs New York, NY
- Lake St. Louis vs Los Angeles, CA
- Lake St. Louis vs Chicago, IL
- Lake St. Louis vs Houston, TX
- Lake St. Louis vs Phoenix, AZ
- Lake St. Louis vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).