Rates target and long-range shooting in daylight, where wind is everything: steady wind and gusts make up about two-thirds of the score. GoDay finds the calmest 2 hours of each day.
Also on the page, but not in the score: wind direction.
A storm holds the score at 2. Thick fog (under 0.8 km) holds it at 2 and fog under 1.5 km at 4. Rain holds it at 4 to 8 depending on how heavy it is, and heat over 38°C (100°F) at 4.
Daylight counts too: at dusk the score is held at 3, and once it's dark at 1.
Under 5 km/h (3 mph) is calm. By 12 km/h (7 mph) it's light but already moving bullets at distance, and past 25 km/h (16 mph) GoDay rates it strong. Steady wind can be dialled in; gusts can't.
Hot air rising off the ground bends light and makes the target shimmer. GoDay starts to mark down heat above 26°C (79°F), and strongly above 32°C (90°F).
Yes, on the conditions cards, so you can tell a crosswind from a head or tail wind at your range.