Daylight & Dew Dial
What does the next 24 hours do to a damp wall? A 24-hour day/night wheel showing daylight, UV exposure and how close the overnight air gets to its dew point — the window mould-suppressing sun opens, and the window overnight condensation opens back up.
24-hour day/night wheel
Noon at the top, midnight at the bottom. The warm half is daylight — sunrise to sunset, ramping dawn → noon → dusk, with the sun rays showing the UV index hour by hour. The starry half is the night, deepest at midnight, with the blue band swelling toward the rim as the air closes on its dew point and the red rim arc marking the condensation-risk hours. The straight line across the disc is the horizon.
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