Barometric pressure does affect ice fishing just like it affects regular fishing.
Because barometric pressure changes are transmitted through ice and into water, fish respond to these changes even underneath a layer of ice.
In general, stable low to medium pressure conditions result in fair ice fishing success, while very low pressure conditions result in poor fishing success.
Heat and Humidity does affect fishing.
Humidity does affect fishing.
Usually when the weather is too hot and too humid fish are less active and bite less.
Most people who fish hang up their rod and reel when the weather gets hot, as the action under the water slows down as temperatures rise.
Fish become heat-stressed and don't hit your lure quite as often as the water heats up.
ust like humans, fish can get testy and cranky when they're overheated.
The best barometric pressure for fishing is between 29.70 and 30.40 inches of Mercury (1005.757 to 1029.462 millibar).
Lower pressure can affect fishing in either a bad way or a good way depending on the species of fish.
Some fish such as the Bass fish are more active in the low pressure while other fish are less active in low pressure.
Low Pressure (29.60 and under/Cloudy/Rainy Weather) - Fishing Slows. Go at them slow in deeper water or near cover.
Rising Pressure/Improving Weather – The fish are slightly active.
Falling Pressure/Degrading Weather - Best Fishing.
Bass bite better in medium to low barometric pressure.
The best barometric pressure for fishing is between 29.70 and 30.40 inches of Mercury (1005.757 to 1029.462 millibar).
This is a medium pressure and if you want to try out some new technique or do any kind of regular fishing, do it during this condition.
When barometric pressure is high, the swim bladder feels increased pressure and the fish becomes slow and tired.
Other anglers fail to explain why it occurs, but agree and claim bass fishing will be at its best during times of dropping, low or slowly rising pressure.
There are 2 different mercury barometers.
But the way you read the mercury barometers are for the stick type mercury barometer (you read the mercury height by looking directly at the top of the column inside the glass tube, and compare it to a scale of inches printed or engraved beside the column), and dial, also known as wheel or banjo (you read from a hand pointing to numbers on a dial.