2026-03-30 7 min read
If you've lived in Hemet for more than one summer, you already know the heat here is no joke. Nestled in the San Jacinto Valley at the foot of the San Jacinto Mountains, Hemet sits inland where temperatures regularly push into the mid-to-upper 90s from June through September. That kind of sustained, dry heat does a number on a lot of things around your home. and your garage door is near the top of the list. Most homeowners don't think about it until something goes wrong. By then, the damage is already done.
Hemet has a Mediterranean hot-summer climate, and the numbers back that up: August averages a high of around 90,95°F, and the area logs nearly 3,400 hours of sunshine per year. That's a relentless amount of UV exposure for any exterior surface, including your garage door. Whether your home is one of the older ranch-style or Craftsman bungalow properties in Downtown Hemet, a newer build in McSweeney Farms, or a Spanish-style home out toward Valle Vista, your door faces west- or south-facing sun for hours every day.
The most visible sign of sun damage is color fade. UV rays break down the chemical bonds in paint and coatings over time, leaving your door looking chalky and washed out. Wood doors are especially vulnerable. UV radiation breaks down lignin, the compound that holds wood fibers together, leading to surface graying and eventually deep structural cracks. Metal doors aren't immune either: when protective coatings degrade, the bare metal beneath becomes susceptible to moisture and rust. If your door has lost its original color or developed a chalky finish, that's not just cosmetic. it's a sign the protective layer is gone.
For wood doors, applying a UV-resistant sealant or paint is the most practical fix. For steel doors, look for touch-up paint designed for exterior metal with built-in UV protection. Lighter colors also help. they reflect sunlight more effectively than dark shades, reducing heat absorption on the door's surface.
Metal expands in heat. That's basic physics, and it's a real problem for garage doors. Most materials used in garage doors. steel panels, aluminum tracks, hinges. expand when exposed to high temperatures. This thermal expansion can shift a door slightly out of alignment with its tracks, causing it to stick, bind, or operate noisily. You might notice this most on the hottest afternoons in July and August when the door that was fine in the morning suddenly feels sluggish or starts grinding.
The lubricants on your springs, hinges, and rollers are also affected. Hot weather causes lubricants to thin out and lose effectiveness faster than in cooler climates. The fix here is straightforward: use a silicone-based lubricant (not WD-40, which actually strips lubrication) on all moving parts, and plan to reapply more frequently during summer months than you would elsewhere. Keep an eye on your garage door springs in particular. repeated heating and cooling cycles cause metal fatigue over time, making springs more prone to cracking or snapping unexpectedly.
This one surprises a lot of Hemet homeowners. The infrared safety sensors near the base of your garage door can actually be disrupted by direct sunlight. When strong afternoon sun hits one of the sensor lenses, it can overpower the infrared beam. making the door's system think there's an obstacle in the path when there isn't one. The door refuses to close, or it reverses for no apparent reason.
If your door behaves erratically on bright afternoons but works fine in the morning or evening, your sensors are likely getting blasted by direct sun. Repositioning the sensors slightly or adding a small shade cover over the lenses can resolve this without any major work. Prolonged UV exposure can also make the plastic sensor housings brittle over time, so inspect them annually.
The rubber seals around the bottom and sides of your garage door take a beating in Hemet's heat. Sun exposure weakens rubber, making it crack, harden, and lose its flexibility. Once the weatherstripping fails, you lose the seal that keeps hot air, dust, and desert grit out of your garage. If your garage feels like an oven even with the door closed, or if you're seeing more dirt and debris tracking in, worn seals are often the culprit. Replacement weatherstripping is inexpensive and one of the best-value maintenance tasks you can do.
You don't need to overhaul everything at once. Here's what actually makes a difference for Hemet homeowners:
- Apply UV-resistant coating or paint on wood or steel doors. especially if you haven't repainted in more than a few years. - Lubricate all moving parts with a silicone-based product every few months during the hot season, not just once a year. - Inspect and replace weatherstripping if it shows cracking or hardening. this also directly improves your home's energy efficiency. Our post on garage door insulation and energy savings explains exactly how much this can impact your utility bills. - Check sensor alignment on bright days to confirm the door operates consistently. - Choose lighter door colors if you're replacing your door. this is especially relevant in sun-drenched neighborhoods like Seven Hills or Hemet West where homes sit with open southern exposure.
If you're seeing multiple symptoms. fading finish, sticky operation, misaligned sensors. it's worth having a professional take a look before something fails completely. Garage Door Hemet offers inspections and maintenance services across the area, including neighboring communities like San Jacinto. You can view our full service offerings or get in touch to schedule a visit.
Q: How often should I lubricate my garage door in Hemet's climate? A: In a hot, dry climate like Hemet's, plan to lubricate springs, hinges, and rollers every 3,4 months during summer rather than just once a year. Heat causes lubricants to thin and dissipate faster than in cooler regions.
Q: My garage door closes fine in the morning but won't close in the afternoon. What's happening? A: This is a classic sign of sun interference with your safety sensors. Direct afternoon sunlight can overpower the infrared beam between the sensors, causing the system to detect a false obstruction. Try shading the sensor lenses or having a technician adjust their angle.
Q: Is a steel door better than wood for Hemet's heat? A: Generally, yes. Steel doors with insulated cores and baked-on enamel finishes handle UV exposure and thermal expansion better than wood. Wood requires more frequent sealing and is more prone to warping in sustained heat. An insulated steel door also keeps your garage significantly cooler in summer.