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National Temperature Control Day arrives every September 22, coinciding with the fall equinox and the official start of autumn. This day highlights the critical role of precise temperature regulation in our homes, workplaces, and industries. Learn how to optimize your environment and support energy-efficient solutions.
Want to sponsor National Temperature Control Day? Learn how
Expected National Temperature Control Day Deals
As a Cause holiday focused on awareness and the importance of climate control, National Temperature Control Day inspires action rather than sales. Organizations like the Air Conditioning Contractors of America (ACCA) and the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) often promote educational campaigns on energy efficiency and proper HVAC maintenance. Expect local HVAC companies to offer free inspections or discounted service calls to ensure systems are ready for cooler weather. Brands like PolyScience, a key partner in this observance, may share insights into their precision temperature solutions for various industries. We encourage you to visit their official websites for resources and ways to get involved in promoting sustainable temperature control practices.
Platform Guide for National Temperature Control Day
Tag National Today (linkedin.com/company/nationaltoday) and use #TemperatureControlDay. Share insights on energy efficiency or workplace climate solutions.
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Mention @NatlToday and use #TemperatureControlDay. Discuss HVAC innovations, sustainable practices, or tips for autumn readiness.
Mention National Today (facebook.com/nationaltoday) and use #TemperatureControlDay. Share personal tips for maintaining comfortable home temperatures or local events.
National Temperature Control Day Hero
Willis Carrier
National Temperature Control Day timeline
German physicist Daniel Gabriel Fahrenheit creates the mercury thermometer. His famous temperature scale (now used in only a few countries) follows ten years later. Swedish astronomer Anders Celsius invents his scale (also known as centigrade) in 1742. Fahrenheit has 180 degrees separating the freezing and boiling points of water, while centigrade has an easier-to-remember 100.
Credit for the modern thermostat generally goes to Scottish chemist Andrew Ure — who created a bimetallic version for textile mills. The thermostat would bend as one of the metals expanded in response to increased temperature — thereby controlling the mills' energy supply. American Warren S. Johnson patents a bimetal room thermostat in 1883.
Seaton T. Preston creates the Illinois-based startup company — which goes on to sell over a million temperature control solutions to large, well-respected manufacturers and distributors. Among the brand's innovations? An award-winning line of culinary products. (The Food Network honored the brand with a technology award in 2007.)
Starbucks exec Peter Dukes, who arrived at the company with a BA in Economics and an MBA from Stanford, comes up with a new idea for a fall espresso flavor. As it happens, Dukes and his former Cardinal basketball teammates used to alternate sips of espresso with bites of pumpkin pie. Do you see where we're going here? Starbucks has now sold more than 350 million pumpkin spice lattes in 50 countries.
Grab a coat — it could happen. The Old Farmer's Almanac calls for a trace of October snow in the Northeast, Appalachians, Lower Lakes, Upper Midwest, High Plains, and Alaska. Expect flurries in Atlantic Canada, western Ontario, and the Prairies as well.
National Temperature Control Day FAQs
When is National Temperature Control Day?
National Temperature Control Day 2026 falls on Tuesday, September 22, coinciding with the autumnal equinox. This day marks the official start of fall and reminds us to prepare our indoor environments for cooler temperatures.
What is the average home temperature in the U.S.?
According to various studies, the average thermostat setting in U.S. homes during summer is often around 72°F (22°C), while in winter, it can drop to 68°F (20°C). These numbers vary significantly based on region, personal preference, and energy efficiency goals.
How much energy does HVAC use?
Heating and cooling systems are typically the largest energy consumers in U.S. homes, accounting for approximately 48% of total energy use. This figure can fluctuate based on climate, insulation, and the efficiency of the HVAC unit itself.
Why is temperature control important?
Temperature control is crucial for human comfort, health, and productivity, preventing issues like heatstroke or hypothermia. It also plays a vital role in preserving food, medicines, and sensitive industrial materials, ensuring their quality and safety.
National Temperature Control Day Activities
Drink in the season
Need some ideas? We checked with the Food Network's Canadian editors (who know the seasons quite well) for an "autumn drink" list. Their top three include Hot Buttered Rum, Classic Pumpkin Spice Latte (of course), and Hot Mulled Cider — which they claim can help soothe the common cold.
Check your home's heating system
Let's get this out of the way before a rare autumn frost hits. Experts recommend to start by replacing your furnace filter (if necessary); checking your heating system for cracks, rust, leaks, holes, or other damage; and making sure all of your heating vents are open and unblocked.
Shop for fall fashion
It's the season for jeans, jackets, belts, sweaters, and knee-high boots. Shorts and crop tops are fun for summer, but autumn brings out your inner runway model. So many choices! The key word for fall? Layering, of course. Autumn has unexpected (and sudden) weather changes. Stay a step ahead by enabling yourself to adjust on the go.
6 Places Where You Will Totally Fall For Autumn
Kyoto, Japan
Check out Tofukuji, a large 13th-century Zen temple in southeastern Kyoto, famous for spectacular autumn colors. Don't miss the Tsutenkyo Bridge, which spans a valley of lush maple trees. Fall colors peak in mid November.
Average November 15 high temperature (Kyoto): 62F
New England
The fun begins in late September with a burst of color throughout Maine and New Hampshire. Things move south by late October — where you'll find the best autumn views (and hues) in Connecticut, Massachusetts, and Rhode Island.
Average October 15 high temperature (Bartlett, NH): 58F
Iceland
Aim for September and October when prices tend to drop. Get set for gorgeous autumn colors, the first snow, and even the Northern Lights!
Average October 10 high temperature (Reykjavik): 42F
Chicago
Joy Morton envisioned a “great outdoor museum” of trees when he established The Morton Arboretum in 1922. It’s a 1,700-acre autumn paradise just 30 miles west of downtown.
Average November 1 high temperature (Chicago): 56F
Ontario
Colorful Canada! Red maple, yellow poplar, and white birch make Ontario's landscape a must-see autumn affair. Try an aerial or rail tour for even more spectacular views.
Average November 1 high temperature (Ottawa): 50F
Bavaria (Germany)
Catch autumn fairs and festivals throughout the season. Experts recommend one of the many "pilgrim paths" that run through Bavaria. The King Ludwig trail is a highlight.
Average November 1 high temperature (Nuremberg): 49F
Why We Love National Temperature Control Day
You can 'feel it in the air'
Unless you reside in the tropics (or the Arctic), autumn has a way of getting your attention. Depending on how far north you actually live, the sun seems to vanish five or six minutes earlier every night. Temperatures drop and sweaters appear. Summer was fun, but things are about to get real.
Autumn poetry
Check out this seasonal (and somber) opening from Robert Frost's "My November Guest" (1913):
"My Sorrow, when she's here with me,
Thinks these dark days of autumn rain
Are beautiful as days can be..."This comes from A Boy's Will, Frost's first commercially published book of poems. Not bad for a first try.
Nature on full display
Birds. Leaves. Trees. Animals. They all have their specific roles when the season starts to turn. Autumn tends to spark change in every living creature (and plant) in one way or another — and they all stage quite a show throughout October and November.
National Temperature Control Day dates
| Year | Date | Day |
|---|---|---|
| 2025 | September 22 | Monday |
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