Online Tool Store
Rainfall Log
Log daily rain gauge readings in inches or millimeters and track cumulative precipitation, rain days, and peak downpours, with CSV export for garden or farm records.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Cumulative Total Precipitation
0 in
0 mm
Rain Days Logged
0 days
Active recorded events
Highest Daily Rainfall
0 in
Avg: 0 in / rain day
Precipitation Log History
| Date | Rainfall (in) | Rainfall (mm) | Intensity | Notes | Action |
|---|
How it works
- Select the observation date and input the measured precipitation depth from your rain gauge (in inches or millimeters).
- Choose the weather event intensity (Drizzle, Moderate, Downpour, or Melted Snow equivalent).
- Click + Log Precipitation Reading to add the event to your chronological ledger.
- View total cumulative precipitation, average event yield, and export logs to CSV.
FAQ
How do I accurately measure rainfall with a home rain gauge?
Place a standard cylinder rain gauge in an open outdoor area away from overhanging trees, roof eaves, and fences. Measure precipitation at the same time each day (typically 7:00 AM or 8:00 AM) and record the level before emptying the gauge.
Can I enter measurements in both inches and millimeters?
Yes. You can toggle between inches (in) and millimeters (mm). The tool automatically converts and logs both values in your summary table.
How does this tool calculate cumulative monthly and annual precipitation?
The log sums all recorded daily precipitation events to calculate cumulative volume, total rain days, average rainfall per rain event, and peak daily downpours.
Can I export my rainfall records for gardening or agricultural records?
Yes. You can copy the formatted log or download a CSV spreadsheet file to analyze seasonal climate patterns and irrigation requirements.
How we compare
| Feature | Online Tool Store | Weather station apps | Paper garden log |
|---|---|---|---|
| Dual unit conversion (in & mm) | ✓ | ✓ | Manual |
| Instant statistical accumulation | ✓ | ✓ | ✗ |
| Zero hardware or account required | ✓ | ✗ (Proprietary hub) | ✓ |