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Does Cold Really Affect the Level Gauge on a Propane Tank?
Similar to the majority of other types of materials, propane is affected by cold temperatures. As the temperature declines, the propane gas contracts. That reduced level of gas in the tank is reflected by the gauge that reflects the level on the tank. Often, this happens whenever a homeowner checks the gauge in cold weather and sees the amount of the tank level before and after delivery. Depending on the weather, the tank level might not rise as much as expected.

Propane Tank Level Gauge
The gauge on the propane tank will show what percentage of the gas tank is still full. Tanks are typically not filled over 80% full as this would allow for the gas to expand on warmer temperatures. For example, a 500 gallon tank, at a reading of 80 percent at normal temperatures reflects about 400 gallons of propane in the tank. This is around how much can be stored.

Normal Temperatures
The propane industry operates the popular website Propane 101, which considers the propane baseline point to be an exterior temperature of 60 degrees. For example, if the gauge reads 50% of capacity on a day when the temperature is close to 60 degrees, then a 500 gallon tank would contain roughly 250 gallons of propane. If the temperature that day is much lower than 60 degrees, the gauge would read lower. Similarly, if the temperature is a lot higher than 60 degrees, the gauge will actually read higher due to the expansion of the gas.

Effect of Expansion and Contraction
The amount of energy contained or energy contained within a tank will not change when the gas either expands or contracts, based on the propane industry web site. The amount of propane itself has not changed, but just the density of the gas has changed.

Cold-Weather Delivery
The homeowner who orders 100 gallons of propane would receive around 424 lbs. of propane. With the delivery of 100 gallons, the homeowner with a 1000 gallon propane tank can expect the guage to go up by 10%. These numbers will be accurate if the temperatures were near 60 degrees at the time of delivery. If the delivery took place during colder weather, these chillier temperatures will result in a smaller increase reading on the propane gauge.

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