与可见性有关的数据特征相当明确：要先有雾，且观测者必须把太阳或月亮放在身后照射云雾，否则光束未形成可见弧线。即使在多雾地区，若站在云内也容易看不到。美国西北部 Mount Washington 天文台位于 6,288 英尺（约 1,917 米），研究人员 Nordin 提到他们有 60% 时间处于雾中，这反映了高频雾情境下观测的高机率与高困难度并存。文中也指出雾形成在春季升温导致雪融化、温差剧烈变化时更常出现。
结论上，Kenny Miller 与 Bailey Nordin 均指出白虹在全球并不常见，除非位于高山或北极等雾频繁区域。研究者可透过改变模拟中液滴大小与形状，重建包括白虹、双重虹、分裂虹等多种光学型态，显示其价值在于验证大气光学理论，而非天气预报或预警用途。Nordin 也补充研究团队常在云内外穿梭，体会到其偶发性；Miller 将其形容为“很酷的现象”，但非任何神秘信号。
A fog bow shares the same basic physics as a rainbow—sunlight interacting with water droplets—but with smaller cloud droplets, diffraction dominates and smears spectral separation, so the arc appears mostly white. In ordinary rainbows, larger raindrops bend and reflect light at different angles, producing visible bands from red through violet. Fog bows are therefore rare visual events with scientific value mainly for atmospheric-optics study: they illustrate how light behaves in airborne water-dispersed droplets.
Observability is constrained by geometry and visibility. Fog must be present, and the sun or moon generally needs to be behind the observer to illuminate the fog in the right direction; being inside dense fog can hide the bow. Mount Washington Observatory sits at 6,288 feet (about 1,917 meters), and Bailey Nordin reports spending 60% of team time in fog, a quantitative sign that a fog-heavy environment does not guarantee easy sightings. Fog is more frequent under strong temperature changes, such as spring warming when melting snow increases condensation.
Kenny Miller and Bailey Nordin both describe fog bows as globally uncommon except in fog-prone regions, especially mountaintops and the Arctic. Scientists can reproduce fog bows, double rainbows, and twinned rainbows in simulations by adjusting droplet size and shape, reinforcing their role in modeling light behavior rather than forecasting special events. The practical takeaway is modest: they are striking but generally just a rare optical phenomenon, valued for curiosity and explanation rather than any special significance.