Dry eyes in Casper, Wyoming

Casper’s air is dry for much of the year and gets windy in bursts. NOAA’s humidity table puts August afternoons at the airport at 25 percent, and the National Weather Service in Riverton logged a 78 mph gust there in December 2025. Add a long heating season at about 5,338 feet and eyes lose moisture fast. Shield them outside, humidify indoors, and use a lubricating drop as labeled.

Why are my eyes so dry in Casper?

Three things stack up. The first is altitude: NOAA lists the Casper/Natrona County International Airport weather station at 1,627 meters, which works out to about 5,338 feet. The second is how little water falls. NOAA’s 1991–2020 normals give the airport 12.22 inches of precipitation a year, which is semi-arid by any measure. The third is wind, which turns dry air from a background condition into something you feel on the surface of your eyes.

The tear film has three layers: a mucus layer against the eye, a watery middle, and a thin oil layer on top that slows evaporation. Dry, moving air pulls at that top layer first. Once it thins, the watery layer underneath evaporates faster, and eyes start to feel gritty, tired or stingy by midafternoon.

Casper humidity, month by month

NOAA’s Comparative Climatic Data table of relative humidity reports a morning and an afternoon reading for each month. For Casper, mornings hover in the low to mid 60s all year. Afternoons are a different story:

• July afternoons average 26 percent, with mornings at 61 percent.
• August afternoons drop to 25 percent, the lowest of the year.
• September afternoons sit at 31 percent, still dry enough to notice on a long day outside.
• Winter afternoons climb back to the high 50s and low 60s, but that’s outdoor air. Heated indoor air is another matter.
• Across the whole year, afternoons average 44 percent.

That summer dip matters because the same months bring heat. NOAA’s normals give Casper a July average high of 89.0°F and about 38 days a year at 90°F or above. Hot, dry afternoons with a breeze off the open country are hard on a tear film.

Wind off Casper Mountain and the high plains

The National Weather Service office in Riverton publishes a yearly climate summary for Casper. Its preliminary 2025 summary, issued January 29, 2026, recorded a highest gust of 78 mph on December 17 and a highest sustained wind of 58 mph two days later. The summary doesn’t list an average wind speed, so there’s no single yearly figure to quote, but those December numbers show what a strong wind event here looks like.

Wind like that does two things to eyes. It strips moisture between blinks, and it makes people squint, which cuts down on full blinks that spread tears. Blowing grit and snow add irritation on top. Wraparound sunglasses or safety glasses break the airflow before it reaches the eye, and a brimmed hat helps with grit.

Long winters and heated air

NOAA’s 1991–2020 normals count an average of 183 days a year when Casper’s low drops to 32°F or colder, roughly half the year. January lows average 15.0°F. Furnaces run from fall into late spring, and forced-air heat lowers indoor humidity further. Snow is part of it too: the normal is 71.8 inches a season, although the Riverton office’s 2025 summary recorded only 34.8 inches that year.

• Run a humidifier in the bedroom and the room where you spend evenings, and clean it the way the maker says.
• Point floor and dash vents away from your face.
• Take short screen breaks; looking at a screen cuts how often you blink.
• Keep water handy, since a heated house dries you out in more ways than one.

Outdoor and field work around Casper

Plenty of Casper jobs happen outside or in a truck: oil and gas field work, pipeline and construction crews, ranching, and long highway drives to job sites. Each one combines wind, dust and a heater blowing in the cab. A few habits help on those days:

• Wear eye protection that wraps around the sides, not just flat lenses.
• Wash dust off your hands before you touch your eyes or a dropper bottle.
• Use a drop at a break, parked and out of the wind, never while driving.
• Keep the bottle in an inside pocket rather than in the truck, where winter cold and summer heat both push past the label’s range.

Dry eyes for outdoor workers has more on long days in the weather.

Using Quell in Casper’s climate

Quell’s label lists its Uses as: For use as a protectant against further irritation or to relieve dryness of the eye. It is designed to reinforce the tear film’s oil layer to help reduce moisture loss, which is the layer dry Wyoming air works on hardest. The directions are the same at any altitude: Apply 1 drop 3 times per day in each eye. A morning drop, one at lunch and one in the evening is an easy way to space them.

Storage needs attention here because temperatures swing so far. The label says: Store between 15° to 30°C (59° to 86°F). NOAA’s Riverton summary recorded a low of minus 25°F at the airport on January 20, 2025, and summer highs pass 90°F on many days. A glove box fails that range in both seasons. Before every use, check the bottle against the label’s Do not use line: If this product changes color. And handle it carefully with cold hands: Do not touch tip of bottle to any surface to avoid contamination.

Ordering Quell to Casper

Quell ships from Brentwood, Tennessee, to addresses across the United States, Casper included. Shipping is $10.00, free on 3 or more bottles, and no delivery date is promised, so order before you’re down to the last bottle. The Casper page and the Wyoming page cover local ordering details, and the Cheyenne guide looks at the state capital’s wind.

If dryness hangs on after you’re out of the wind and indoors, follow the label: Stop use and ask a doctor if you feel eye pain or changes in your vision, if irritation or redness continues, or if the condition worsens or persists for 72 hours. The self-check can help you describe what you’re feeling to an eye doctor. It is not a diagnosis.