2026-03-13 7 min read
Living in Hemet means dealing with one of the more demanding climates in Southern California. Sitting in the San Jacinto Valley at the foot of the San Jacinto Mountains, the city bakes through summers where temperatures routinely push into the mid-to-upper 90s. and occasionally tip past 100°F. That kind of sustained heat isn't just uncomfortable for people. It quietly beats up your garage door, season after season, in ways most homeowners don't notice until something breaks.
If you want to get ahead of the damage, understanding exactly how Hemet's climate affects each part of your door is the first step. Check out our seasonal maintenance tips for a broader overview, but here we're going to focus specifically on the heat.
Hemet has a Mediterranean hot-summer climate. long, arid summers and mild, wetter winters. Temperatures typically range from around 41°F in the coldest winter nights to 95°F on a peak summer day, and that 50-plus degree seasonal swing puts real stress on metal, rubber, and wood components alike.
High heat causes metal parts. tracks, springs, hinges, and roller shafts. to expand. That thermal expansion can lead to misalignment or increased friction between moving parts. In Hemet's dry environment, dust also infiltrates hinges, cables, and pulleys regularly, making that friction even worse. The result is a door that strains more with every cycle, wearing parts down faster than you'd see in a milder climate like Murrieta or Menifee.
Excessive heat can also degrade lubricants, causing them to break down or evaporate and leaving springs and other components dry and more susceptible to wear. This is why a tube of standard lithium grease isn't enough here. synthetic lubricants that maintain stability in high temperatures are a smarter choice for Hemet homes.
The bottom seal and side weatherstripping on your garage door are made from rubber or vinyl. materials that hate prolonged heat exposure. In desert-adjacent conditions like Hemet's, the intense heat causes these components to dry out, crack, or lose their flexibility. Once that happens, you're not just letting hot air in; you're also letting in dust, insects, and in winter, the cold drafts that come down from the San Jacinto range. Replacing dried weatherstripping is one of the cheapest maintenance tasks you can do, and one of the highest-impact ones.
Hemet averages roughly 3,400+ hours of sunshine per year. All that sun exposure does visible damage to garage door surfaces over time. UV rays break down paint finishes, fade color, and can warp or degrade panels. especially on wood doors. The city has a strong mix of older ranch-style homes and Spanish-style residences, many with wood or wood-composite doors that are particularly vulnerable to UV degradation. If you notice fading, chalking, or surface cracking on your door, sun damage is almost always the culprit.
Fiberglass doors and insulated steel doors hold up better to UV exposure and heat. If you're replacing a door on a home in East Hemet or Valle Vista, where larger lot homes get full southern sun exposure for most of the day, this is worth factoring into your material choice. Browse our garage door styles guide for a breakdown of materials and which perform best in warm climates.
This one surprises a lot of homeowners. During summer, direct sunlight can interfere with the infrared sensors used in garage door systems. If the sun hits a sensor at the right angle. which happens more often than you'd think in Hemet's long sunny days. it can overpower the beam, causing the door to behave as though there's an obstacle in the path. Prolonged UV exposure also degrades the plastic housing on sensors over time, making them brittle and prone to cracking.
If your door randomly refuses to close on a sunny afternoon, check whether the sun is shining directly into one of the sensors before you assume the unit is failing.
Here's what actually helps, broken down by effort level:
- Lubricate every six months. spring and fall. Use a silicone-based or synthetic lubricant on rollers, hinges, and springs. Avoid WD-40; it attracts dust, which is everywhere in the San Jacinto Valley. - Inspect weatherstripping twice a year. If it crumbles when you press it or has visible gaps, replace it. A $20 seal replacement can prevent a $200 heat-related repair. - Clean the tracks regularly. Dust buildup in tracks creates friction and can cause the door to run unevenly or off-track.
- Add insulation to your garage door if you haven't already. An uninsulated door in Hemet's summer heat turns your garage into an oven, driving up cooling costs for the rest of the house and accelerating wear on the door's components. - Check sensor alignment on hot days and shade them if needed. A small piece of cardboard tube taped around the sensor can block direct sun without blocking the beam path.
If you're noticing the door straining to open, moving unevenly, or grinding louder than usual, the heat may have accelerated wear on springs or rollers to a point where DIY maintenance won't cut it. Spring systems in particular are under significant tension and should always be handled by a professional. Our team at Garage Door Company Hemet offers inspections and full service for heat-stressed systems across the area.
Q: How often should I lubricate my garage door in Hemet's climate? At minimum, twice a year. once in spring before the heat peaks, and once in fall. Given Hemet's extreme summer temperatures and dusty conditions, some homeowners benefit from a mid-summer check as well, especially if the door sees heavy daily use.
Q: My garage door worked fine all winter but stopped closing properly in summer. What's happening? This is a classic heat-season issue in the San Jacinto Valley. Direct sunlight hitting your safety sensors is a common culprit. it can overwhelm the infrared beam and cause the door to act as if something is blocking it. Check whether the sensors are in direct sun during the afternoon. Thermal expansion causing track misalignment is another possibility worth having a technician evaluate.
Q: Is it worth insulating my garage door in Hemet? Absolutely. With summer highs regularly in the 90s and beyond, an uninsulated door lets enormous heat into your garage, which can then bleed into your living space and spike your cooling bills. Insulated doors also reduce wear on internal components by stabilizing the temperature environment around springs and openers.