Air Quality and Pollution
The valleys of the Wasatch Front of northern Utah experience their greatest concentrations of nitrogen oxides, carbon monoxide and particulates from November through February. Ozone reaches …
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Local knowledge. Wider perspective.
Utah, through
weather.
A place to understand our skies, explore our past, and make sense of a changing climate.
Explore our climate →Southern Utah, storm to sun AI-generated illustration
WEATHER & WATER
Your corner of Utah.
Local forecasts and trusted sources for the conditions that matter.
Find your forecast →THE WEATHER ALMANACSINCE 1847
Every day has a story.
Explore the events and observations in Utah’s historical weather collection.
Travel through weather history →A DAY TO REMEMBERSEPT 18, 2026
A tornado in
the Wasatch.
Farmington & Fruit Heights: the NWS report, eyewitness videos, and the story so far.
Explore the event →FOLLOW YOUR CURIOSITY
September25ON THIS DAY
FROM THE UTAH WEATHER ALMANAC
There’s history in the forecast.
In 1926, Provo experienced its coldest September morning ever with 21 degrees. In 1935, a cloudburst on the west side of Mt. Nebo flooded Nephi. The main highway was covered with mud and debris. In 1963, rain, hail and wind hit the Manti-Ephraim area. Hailstones were one-half inch in diameter and the gutters overflowed into the streets.
Read this day in weather history →Historical accounts and separately credited additions.
A PLACE TO START
The science behind our skies.
Allergies
Pollen Forecast for your area (via The Weather Channel) Pollen Count (via the Intermountain Allergy and Asthma Clinic)
Explore the articleAnnual Normal Precipitation
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PHOTO OF THE DAY · September 25
Lightning over Lehi
Lightning hits Lehi, Utah, on June 9, 2006, 10:15 PM Photograph by Trevor Hansen; courtesy of ABC4-KTVX Television
Trevor Hansen
Explore the photo collection →From the historical collection; the feature date is not the date the photograph was taken.FIND YOUR WAY INTO THE COLLECTION
What are you curious about?
BUILT ON SHARED KNOWLEDGE
A changing climate. A growing conversation.
Our understanding grows through observation, evidence, and the people who ask good questions. UCCW brings local expertise together for everyone.
Built on local knowledge. Open to discovery.
A shared resource for students, educators, scientists, and everyone curious about Utah.
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