Keeping Your Rental Cool in Portland’s Summer Months

While our Pacific Northwest climate may be known for its rainy winters, Portland certainly experiences its fair share of hot and sunny days in the summer. In fact, we’re located in a “marine west coast climate zone,” known for wet winters and dry, warm summers. And as recent years have shown—remember that heat dome back in 2023?—having a plan for staying cool on our hotter days is an essential part of staying comfortable before the rains set back in again.

If you’re renting in Portland, staying comfortable in the heat can be a bit more complicated than just flipping on a central AC unit, especially since many older rentals in Portland don’t have central air at all. Let’s walk through some innovative ways to beat the heat and stay safe, comfortable, and energy-efficient during those dog days of summer.

What are Portland’s Summer Temperatures Like?

Portland’s summer temperatures tend to be mild by national standards, which is why many older homes were built without air conditioning. July and August are typically the warmest, with highs hovering around the low-to-mid 80s. That said, it’s not uncommon to experience heat waves where temperatures climb into the 90s—or even past the 100-degree mark.

Depending on the layout of your home, your insulation, your access to shade, and even the color of your walls (darker colors absorb more heat), a sunny 85-degree day can feel more like an oven if you’re not prepared. Homes with large south or west-facing windows, older single-pane glass, or minimal tree coverage can trap heat quickly. Combine that with a lack of AC, and suddenly, your charming vintage rental isn’t feeling quite so charming.

Managing Hot Temperatures Without AC

If your rental doesn’t have air conditioning and you’re not quite ready to invest in a unit, don’t worry. There are still several low-cost and effective ways to manage indoor temperatures.

Open Windows Strategically

Take advantage of Portland’s cool night and morning air. Open windows in the early morning or after sunset to let in cool breezes, then shut them (and the blinds) once the sun starts heating things up. Creating cross-ventilation by opening windows on opposite sides of your home can help circulate air and cool things down quickly.

Use Curtains and Blinds Wisely

Close your blinds or curtains during the day—especially for south- and west-facing windows. Blackout curtains or thermal-insulated drapes can significantly reduce the amount of heat that enters your home. For renters who can’t install anything permanent, temporary stick-on blinds or tension-rod curtain panels are great, landlord-friendly options.

Know Your Home’s Orientation

Pay attention to which parts of your home get the most sun. South-facing windows get strong sunlight throughout the day while west-facing windows are hit hard in the late afternoon. If your bedroom faces west, for example, it may be worth investing in extra heat-blocking window coverings or a portable fan to make sleeping more comfortable.

Cook Smart

On really hot days, avoid using your oven or stovetop, which can significantly heat up your space. Opt for cool meals like salads, sandwiches, or smoothies, or fire up the outdoor grill if you have access to one. Microwaves, toaster ovens, and slow cookers are better alternatives that generate less heat.

DIY Cooling Tricks

Place a container of ice in front of a fan to blow cool air, or hang a damp sheet in front of an open door or window to create a natural cooling effect. You can also freeze water bottles or use gel ice packs to cool down your bed before sleeping. Small changes can make a big difference.

New AC regulations in Portland

With the rising temperatures, Portland lawmakers are taking heat seriously. In 2023, Oregon passed a law granting tenants the right to install portable air conditioners in their rental units, provided certain safety conditions are met.

This law benefits renters, especially those in older buildings. As long as the AC unit doesn’t damage the property and doesn’t violate the building’s electrical capacity, your landlord generally can’t prohibit you from installing a portable unit. That said, always communicate with your property manager and check the specific rules for your lease before installing anything.

For more on this new legislation and what it means for both renters and landlords, check out our article breaking down everything you need to know.

Picking Out the Right AC Unit

If you’ve decided to invest in air conditioning, the next step is choosing the right unit. Not all ACs are created equal, and finding one that fits your space and budget can make all the difference.

Assess Your Needs

Start by thinking about how much space you need to cool. A small bedroom may only need a compact 5,000 BTU unit, while a larger living area might require something closer to 10,000 BTUs. If you’re only home in the evenings, a single-room solution might be enough. But if you work from home, a more powerful unit (or even multiple portable units) might be worth the investment to cool your space.

Consider Portability and Installation

Window units are generally more powerful and energy-efficient, but they require a compatible window and can be heavy to install. Portable floor units are easier to set up and move from room to room, but they can be noisier and less efficient. Some models also require venting through a window using a hose.

Whichever type you choose, make sure it’s safe for your specific rental setup—and don’t forget to use a secure window bracket if you’re installing a unit several stories up.

Think About Energy Efficiency

Look for units with Energy Star ratings to ensure maximum efficiency. On top of cutting down your carbon footprint, it’ll also help you save on your monthly electric bill. Models with programmable timers, sleep modes, or smart technology (like app-based controls) also allow you to optimize use and reduce unnecessary energy consumption.

Shop Smart

It can be tempting to buy the cheapest model or grab a used unit from a secondhand store. While this can work, consider that newer, name-brand models often come with better warranties, quieter operation, and improved efficiency. If you’re buying used, test the unit before committing, and be wary of older models that may have refrigerant issues or excessive wear.

Find A Comfortable Rental

Portland summers are a beautiful time of year—but they can also be intense. Heat-related illness is a serious concern, especially for seniors, young children, and those with underlying health conditions. Always stay hydrated, take breaks from the heat, and don’t hesitate to visit a local cooling center if your home becomes too hot during a heat wave.

If you’re in the market for a new place, keep cooling in mind during your apartment or house hunt—especially if you’re planning to stay long-term. At Rent Portland Homes Darla Andrews’ Office, we offer a wide selection of rental properties with air conditioning, cool locations, and all the best amenities. Check out what we have to offer on our website, or give us a call for more information. We’d love to get you into a cool new rental.