Data Sources
All climate data on this site is sourced from the National Oceanic and Atmospheric Administration (NOAA) Climate Normals dataset (1991-2020). NOAA maintains weather stations across the United States that record temperature, precipitation, snowfall, and other meteorological measurements.
The Climate Normals represent 30-year averages of weather observations, providing a standardized baseline for understanding typical climate conditions at each location.
Data Consolidation
Many cities have multiple weather stations (airports, downtown locations, regional facilities). To provide the most complete climate picture, we consolidate data from multiple stations serving the same city when appropriate.
Our consolidation process:
- Identifies stations within the same metropolitan area
- Merges complementary data (e.g., temperature from one station, precipitation from another)
- Averages coordinate data when combining multiple station locations
- Uses the simplest city name when multiple variants exist
This consolidation process aims to provide the most complete climate picture for each city by combining data from all available sources.
Data Quality & Coverage
Our dataset includes climate statistics for over 6,500 cities across all 50 US states. We prioritize data completeness and only include cities with reliable temperature measurements.
Not all cities have data for every metric. Data availability varies based on what each NOAA weather station measures. Some stations may have comprehensive data including temperature, precipitation, snowfall, and extremes, while others may have more limited observations.
Accuracy & Limitations
While we strive for accuracy, this data is provided on a best-effort basis for educational and informational purposes only. Climate data represents historical averages and may not reflect current or future conditions.
Limitations to consider:
- Weather station locations may not perfectly represent all areas within a city
- Microclimates and elevation changes can create local variations
- Historical averages may not reflect ongoing climate change trends
- Data processing and consolidation may introduce minor discrepancies
Intended Use
This data is intended for:
- General climate research and education
- Comparing typical weather patterns between cities
- Understanding seasonal climate variations
- Personal planning and informational purposes
This data should not be used for critical decision-making, commercial applications, or situations where accuracy is essential. For authoritative climate data, please consult NOAA directly.
Updates & Corrections
Our dataset is based on NOAA Climate Normals (1991-2020). While NOAA updates Climate Normals every 10 years, we may not immediately reflect these updates. Data is provided as-is without warranty of any kind.
If you notice errors or have questions about the data, please refer to the official NOAA Climate Normals dataset for authoritative information.