Does Cold Temperature Affect a Propane Tank Level Gauge?
Propane is like most other types of materials in that it is affected by cold temperatures. The propane gas contracts as the temperature does down. That reduced level of gas in the tank is reflected by the gauge that reflects the tank level. Usually, this occurs whenever a homeowner checks the gauge during cold climate and sees the amount of the tank level before and after delivery. Depending upon the climate, the tank level might not rise as much as expected.

Propane Tank Level Gauge
The gauge on a propane tank shows you what fraction of the tank is full. Normally, tanks are not filled over 80% so as to enable the gas to expand on hot temperatures. Like for instance, a 500 gallon tank, at a reading of 80% at normal temperatures reflects approximately 400 gallons of propane in the tank. This is about the amount that is able to be stored.

Normal Temperatures
The web site Propane 101, that is managed by the propane industry, considers an exterior temperature of 60 degrees to be the baseline or reference point. For instance, 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 about 250 gallons of propane. If the temperature that day is a lot lower than 60 degrees, the gauge will read lower. Similarly, 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
Based on the information given by the propane industry web site, the amount of energy contained within the tank does not actually change as the gas contracts or expands. 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 will be given roughly 424 pounds 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 conditions, these chillier temperatures would result in a smaller increase reading on the propane gauge.