The wind rose
Read the wind rose, filter it to the months that matter, and see the prevailing direction, average speed and calm hours.
Read the rose #
The Wind rose card shows where the wind blows from, in 16 directions, with north at the top.
- Petal length is the share of hours the wind blows from that direction. The rings mark the shares.
- Color is speed, in bands from 1–5 mph up to 25+ mph. The legend under the rose names them.
- The middle shows the share of hours that are calm.
Pick months #
The buttons above the rose filter it:
- All year shows every hour of the year.
- Click a month to show just that month. Click more months to add them; click a month again to drop it.
The card's title and the summary beside it follow your choice ("Wind rose — Jan, Feb, Dec"). A January rose and a July rose are different design problems: check the cold months before you place entries, and a warm month for cross-ventilation.
The month filter is just your view. It isn't saved with the scheme, but it does carry into the wind rose exports.
What the wind does here #
The second card sums up the months you picked in one sentence, then lists:
- Prevailing direction: where the wind most often comes from.
- Average speed, in mph.
- Calm (<1 mph): the share of calm hours.
- Peak hour: the strongest hourly speed in the record.
- Hours of record: how many hours went into the rose.
The wind is measured at the station, usually an airport, about 33 feet above open ground. Terrain, trees and neighboring buildings change the wind at your site.
Chart colors #
The Colors setting above the study recolors the charts in every climate tool on this device:
- Tool colors: each tool's own colors.
- By value: colored by the value, temperatures cold blue to hot red, other measures by size.
- Brand color: one color you pick, lighter to darker by value. Use the swatch to set it.
It colors the charts on screen and the site climate board. It's a setting on this device, not part of the scheme.