What effect does fog or rain have on 10-meter and 6-meter band signals?

Radio waves in the 10-meter and 6-meter bands have relatively long wavelengths compared to the physical size of raindrops and fog particles. Because these wavelengths (roughly 30 feet and 18 feet respectively) are so much larger than water droplets, the radio signals pass right through them without interacting significantly. Weather phenomena like heavy rain, fog, or snow only begin to severely absorb or scatter radio signals at much higher frequencies, primarily in the microwave bands where the wavelength approaches the actual size of the precipitation. Therefore, normal weather has little to no effect on 10-meter and 6-meter band signals.