How the heatmap works
Color = how good that factor is. Blue = best, red = bad. Colorblind-friendly palette (no red-green). The number in each cell is the raw value.
- temp
- Rock temp = air temp + sun bump per crag aspect. Sport crags ideal 50–70°F, boulder crags 45–55°F. Bad below 35°F or above 90°F.
- dew
- Worse of two: high humidity (dewpoint 60°F+ = greasy holds) or low temp-to-dew spread (<5°F means rock will condensate, slicking up).
- rain
- Today: rain amount in past 24h. Tomorrow / day after: expected rain during daytime hours.
- precip
- Max chance of rain during that day. 0% = best, 100% = bad.