Moderate climate load. Physical climate score and electricity cost are reported separately.
St. Louis has a moderate climate load. Its Climate Stress Score of 41.9 is above the indexed-metro median of 37.9. The January normal low is 24.6°F, and 3 months have a normal low below freezing.
The primary planning issue in this profile is site design and equipment selection rather than severe climate. The standardized 9 kW session estimate is $2.49, above the indexed-metro median of $2.46; this uses the Missouri statewide residential electricity average, not a city utility quote. The selected snowfall record reports 16.6 inches annually.
For construction or maintenance work that is easier in moderate conditions, the monthly normals point to March, April, May, September. This is a climate-screening observation, not a construction schedule or permit recommendation.
| Profile | Climate | 9 kW session | Jan. low |
|---|---|---|---|
| St. Louis | 41.9 | $2.49 | 24.6°F |
| Indexed median | 37.9 | $2.46 | — |
| Closest index peer: Louisville | 41.2 | $2.12 | 25.9°F |
Climate source: NOAA/NCEI U.S. Monthly Climate Normals 1991–2020 (direct by-station archive)
Temperature/precipitation station: USC00237452 — ST LOUIS SCI CTR (3.8 mi from city reference point)
Snow station: USW00013994 — ST LOUIS LAMBERT INTL AP (12.6 mi from city reference point)
Normal period: 1991–2020
Electricity source: EIA residential retail electricity price (2026-07)
Rate geography: Missouri statewide residential average
Dataset generated: September 28, 2026
Recent observations through: Not available
Snowfall status: available. Missing values are not included in rankings.
