Phoenix heat and your gate opener

Short answer

Phoenix averages 21 days a year at 110F or more, and hit a record 70 such days in 2024. LiftMaster says gate batteries degrade with temperature and use, and recommends replacing them every 3 years. In Phoenix, check your battery before summer. Sources: NWS Phoenix, LiftMaster RSL12V manual.

Phoenix heat in numbers

An average of 21 days a year at 110F or more (1991 to 2020).
A record 70 days at 110F or more in 2024.
A record 145 days at 100F or more (2020).
All-time high: 122F on June 26, 1990 (NWS Phoenix).

What the makers say about heat

LiftMaster says batteries degrade with temperature and use, and should be replaced every 3 years (LiftMaster RSL12V manual). Mighty Mule says every 2 to 3 years, or sooner if a battery leaks or corrodes (Mighty Mule gate opener maintenance guide). We do not have a source for other heat effects on gate openers, so we do not list any.

Before summer

Note your battery's age and replace it if it is near 3 years.
Look for a swollen, leaking or corroded battery.
Clean the solar panel (Mighty Mule gate opener maintenance guide).

Signs of a weak battery

The gate moves slowly, stops or reverses.
Low battery beeps or codes: LiftMaster 40 to 42, Mighty Mule 5 beeps every 2 seconds (LiftMaster troubleshooting guide, Mighty Mule MM360 installation manual).

Call a gate company when

A new battery does not fix it.
The battery keeps failing early.

What it may cost

Dead gate battery	$80 to $280
Labor	$60 to $200 an hour

National ranges from Angi, not quotes. See the full cost guide.

Questions people ask

Quick answers

Does heat affect gate opener batteries?

LiftMaster says batteries degrade with temperature and use, and recommends replacing them every 3 years.

How hot does it get in Phoenix?

Phoenix averages 21 days a year at 110F or more; the all-time high is 122F (NWS Phoenix).

Want a local company to look at it?

See gate companies in Phoenix

Your request goes to one independent local company you pick. You see its name before you send. Free.

Gate companies in Phoenix, AZ

Gate Repair USA is not a gate company. These guides are general information from the sources listed below. Stop at the safe checks: anything inside the control box, wiring, force or limit settings is a job for a gate technician. Costs are national ranges, not quotes.

Sources for this page

Last checked: November 2, 2026.