Humidity card

Who it’s for

Building managers, HVAC engineers, farmers, and city operators ask “is the humidity comfortable right now, or is it too dry or too damp?” Humidity affects occupant comfort, mold risk, livestock health, and crop storage — a number that matters across offices, warehouses, greenhouses, and outdoor stations alike.

What it does

A sensor reading 52% shows a blue icon and value — Comfortable. The same card turns orange at 28% — Dry — and shifts to deep blue at 85% — Very Humid.

• Color-coded icon and value that change across five humidity bands, from Very Dry to Very Humid
• Auto-scaling layout that fits any card size
• Last-updated timestamp showing how long ago the reading arrived
• Shows one sensor’s data; it does not chart trends or compare multiple zones

How to set up

Data keys

Key	Role	Type	Description
humidity	Main value	Timeseries	Relative humidity in %; change the key name to match your device’s telemetry key

The widget ships with a simulated function datasource key labeled Humidity, so it draws random values until you point the datasource at a device and rename the key.

To point it at your own device: open the dashboard in edit mode, open the widget’s Datasources, pick the entity or entity alias, and replace the function key with the key your device reports.

The card shows the value in % with no decimal places. If the key has never reported, the card displays the label and icon with an empty value, not an error.

Value ranges

Range (%)	Level	Color
0–20	Very Dry	Red
20–40	Dry	Orange
40–60	Comfortable	Blue
60–80	Humid	Dark Blue
80–100	Very Humid	Deep Blue

How to customize

• To use your own humidity thresholds — edit Icon color ranges and Value color ranges; set the same boundaries in both so the icon and the number always agree.
• To change the icon — set Icon to any Material or MDI icon name.
• To reposition the label — change Label position to top, bottom, left, or right.
• To hide the label, icon, or timestamp — turn off Show label, Show icon, or Show date.
• To switch to an absolute timestamp — turn off Last update ago in the date format settings.
• To match your dashboard’s fonts — set Value font and Label font.

Tips

• Keep Icon color ranges and Value color ranges on the same boundaries so the icon and the number always show the same band.
• The comfort zone for most indoor spaces is 40–60%. Below 30% can cause dry skin and static; above 70% encourages mold and dust mites.