What is the Climate Data Analyzer?
Analyze temperature and precipitation climate data with this free climate data analyzer. Paste daily or monthly values (comma, space, or newline separated) to compute mean, median, min, max, standard deviation, heating and cooling degree days, frost and hot days, wet-day counts, dry spells, and Northern Hemisphere seasonal summaries (DJF, MAM, JJA, SON). Supports °C/°F and mm/inches. Runs instantly in your browser — data never leaves your device.
How to use the Climate Data Analyzer
- Choose Temperature Series, Precipitation Series, or Monthly / Seasonal analysis.
- Select units (°C/°F or mm/inches) and set degree-day base or wet-day threshold.
- Paste your climate values into the data field.
- For seasonal mode, enter exactly 12 monthly values (Jan–Dec).
- Review statistics, seasonal breakdown, analysis steps, and copy results.
Common use cases
- Summarizing a month of daily temperature readings for a school project
- Computing HDD and CDD from utility billing period temperatures
- Analyzing rainfall totals, wet days, and dry spells from a rain gauge log
- Building seasonal climate summaries from 12 monthly averages
- Quick descriptive statistics before importing data into a spreadsheet
Frequently asked questions
- What data format does this accept?
- Enter numbers separated by commas, spaces, tabs, or new lines — for example daily temperatures or monthly rainfall totals. Seasonal mode expects exactly 12 values in calendar order from January through December.
- What are heating and cooling degree days?
- Heating degree days (HDD) sum how much each period falls below a base temperature: Σ max(0, base − T). Cooling degree days (CDD) sum excess above the base: Σ max(0, T − base). Common bases are 18°C or 65°F.
- How are wet days counted?
- A wet day is any period where precipitation meets or exceeds your threshold (default 0.1 mm or 0.01 in). The tool also reports dry days and the longest consecutive dry spell.
- What seasonal groups are used?
- Northern Hemisphere meteorological seasons: winter (DJF), spring (MAM), summer (JJA), and autumn (SON). For temperature, seasonal values are means; for precipitation, they are totals.
- Is my climate data uploaded?
- No. All parsing and statistics run entirely in your browser. Nothing is sent to a server.
