Does Cold Temperature Truly Affect the Level Gauge on a Propane Tank?
Propane is similar to nearly all 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 tank level. Normally, this occurs whenever a homeowner checks the gauge during cold weather conditions 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 anticipated.

Propane Tank Level Gauge
The propane tank's gauge shows you what portion of the tank is full. Normally, tanks are not filled more than 80% in order to enable the gas to expand during warm temperatures. Like for instance, a 500 gallon tank, at a reading of 80% at normal temperatures reflects roughly 400 gallons of propane inside the tank. This is roughly how much can be stored.

Normal Temperatures
The propane industry manages the popular website Propane 101, that considers the propane reference 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 near 60 degrees, then a 500 gallon tank will contain approximately 250 gallons of propane. If the temperature that same day is a lot lower than 60 degrees, the gauge will read lower. Also, if the temperature is a lot higher than 60 degrees, the gauge will actually read higher since the gas expanded.

Effect of Expansion and Contraction
According to the information given by the propane industry website, the amount of energy contained within the tank does not really change as the gas expands or contracts. 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 took place during colder weather conditions, these chillier temperatures would cause a smaller increase reading on the propane gauge.