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Does Cold Actually Affect the Level Gauge on a Propane Tank?
Propane is like most other types of materials in that it is affected by cold temperatures. The propane gas contracts when the temperature does down. That reduced level of gas in the tank is reflected by the gauge that reflects the level on the propane tank. Often, this occurs whenever a homeowner checks the gauge in cold weather conditions and sees the amount of the tank level before and after delivery. Depending upon the conditions, the tank level may not go up as much as anticipated.

Propane Tank Level Gauge
The gauge on a propane tank shows you what fraction of the tank is full. Usually, tanks are not filled over 80% in order to allow the gas to expand during warm days. For example, a 500 gallon tank, at a reading of 80% at normal temperatures reflects around 400 gallons of propane inside the tank. This is about the amount that could be stored.

Normal Temperatures
The website Propane 101, which is operated by the propane industry, considers an exterior temperature of 60 degrees to be the reference or baseline point. Like for example, if the gauge reads 50 percent of capacity on a day when the temperature is close to 60 degrees, then a 500 gallon tank will contain around 250 gallons of propane. If the temperature that day is a lot lower than 60 degrees, the gauge would read lower. Similarly, if the temperature is much higher than 60 degrees, the gauge will actually read higher since the gas expanded.

Effect of Contraction and Expansion
The energy contained or amount of energy contained in a tank will not change when the gas either expands or contracts, according to the propane industry website. 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 will receive 424 lbs. 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 accurate if the temperatures were near 60 degrees at the time of delivery. If the delivery happened during colder weather conditions, these chillier temperatures would cause a smaller increase reading on the propane gauge.

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