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Does Cold Actually Affect the Level Gauge on a Propane Tank?
Propane is similar to most other kinds of materials in that it is affected by cold temperatures. The propane gas contracts as the temperature declines. That reduced level of gas inside the tank is reflected by the gauge which reflects the level on the tank. Normally, this happens whenever a homeowner checks the gauge in cold conditions and sees the amount of the tank level before and after delivery. Depending on the weather conditions, the tank level may not go up as much as expected.

Propane Tank Level Gauge
The propane tank's gauge shows you what percentage of the tank is full. Normally, tanks are not filled more than 80% so as to allow the gas to expand on warm days. For instance, a 500 gallon tank, at a reading of 80 percent at normal temperatures reflects approximately 400 gallons of propane in the tank. This is around how much is able to be stored.

Normal Temperatures
The web site Propane 101, which is operated by the propane industry, considers an exterior temperature of 60 degrees to be the reference or baseline point. For example, if the gauge reads 50% of capacity on a day when the temperature is near 60 degrees, then a 500 gallon tank would have about 250 gallons of propane. If the temperature that day is much lower than 60 degrees, the gauge would read lower. Also, if the temperature is much higher than 60 degrees, the gauge would actually read higher due to the expansion of the gas.

Effect of Expansion and Contraction
According to the information provided by the propane industry website, the amount of energy contained within the tank does not actually change when the gas contracts or expands. The amount of propane itself has not changed, but only the density of the gas has changed.

Cold-Weather Delivery
If a homeowner orders 100 gallons of propane to be delivered, they would receive 424 pounds of propane. If the homeowner has a 1000 gallon propane tank, they could expect the gauge to go up by 10% with the delivery of 100 gallons. These numbers would be correct if the temperatures were near 60 degrees at the time of delivery. If the delivery happened during colder weather, these chillier temperatures would result in a smaller increase reading on the propane gauge.

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