Data Series
What Three Summers of Noon Readings Actually Show
A single fixed hour, tracked for three years, turns out to hide as much as it reveals.
Station Log — Specimen Week, Late June 2026
| Day | High | Low | Pressure (mb) | Trend | Rain (in) | Notes |
|---|---|---|---|---|---|---|
| Mon 15 | 78.4 | 61.2 | 1015.8 | Steady | 0.00 | Clear, light haze at dusk |
| Tue 16 | 81.1 | 63.5 | 1013.2 | Falling | 0.00 | Cirrus moving in from west |
| Wed 17 | 79.6 | 64.9 | 1009.7 | Falling | 0.18 | Brief afternoon shower |
| Thu 18 | 74.2 | 60.3 | 1011.4 | Rising | 0.42 | Overnight rain, gauge checked twice |
| Fri 19 | 77.8 | 58.7 | 1016.9 | Rising | 0.00 | Clear, low humidity |
| Sat 20 | 83.0 | 62.4 | 1017.5 | Steady | 0.00 | Warmest noon reading of the week |
| Sun 21 | 80.5 | 63.8 | 1014.6 | Falling | 0.05 | Fog before 7am, cleared by 9 |
A single specimen week pulled from the running log, kept here as an example of the format — not a live feed. Full method notes in the Glossary and FAQ.
From the Log
A Three-Year Backyard Record, and What the Monthly Average Leaves Out
Barograph is a running notebook from one home weather station — noon readings, a home barometer, and a rain gauge kept honest against a borrowed reference. The site exists to show the daily record behind the summary, and to work through calibration questions a lab would answer in an afternoon and a backyard has to answer over a season.
Field Notes
9 recent entries
Data Series
Method
The Monthly Average Hides the Day It Happened
Two months with the same mean can contain completely different weeks.
Calibration
Calibrating a Home Barometer Without a Lab
A borrowed reference reading and a notebook are usually enough to start.
Instruments
Screen Placement and the Half-Degree of Radiant Error
Moving a thermometer eighteen inches changed three years of afternoon highs.
Field Notes
Reading the Trend Arrow Correctly, or Not at All
The little arrow on a home barometer answers a narrower question than most people think.
Microclimate
A Year of Fog Mornings, Counted by Hand
Counting fog by eye instead of instrument turned into the most useful log of the year.
Archive
The Drift Nobody Notices Until the Second Winter
Sensors do not fail loudly; they wander a little every season until a check catches it.
Records
Comparing Two Thermometers a Decade Apart
Retiring an old instrument meant a month of parallel readings before trusting the new one.
Almanac
What the Almanac Gets Quietly Wrong
Old folk rules made in a different climate zone still get repeated as if local.
Noon reading78.4°F
Pressure1015.8 mb
Rain today0.00 in
TrendSteady
Companion App
Raingauge Log
The notebook this site is built on started as a paper log, then a spreadsheet, then Raingauge Log — a small app for keeping a daily station record, checking it against a reference point, and seeing a season at a glance instead of just a monthly mean.
See how it worksAbout this log
Barograph is written by a small group of backyard observers keeping one long station record and comparing notes on method. No products are sold here. Read more on the About page, or browse the Glossary for the terms used throughout the log.