Salt Lake City woke up clear and about 34°F on Saturday morning, April 18, but there is still subfreezing air lurking at ground level. A Freeze Warning stays in place through noon MDT, with frost and hard freezes expected before the sun does its work. Tender plants and unprotected outdoor plumbing are on the line, so residents should be ready to cover pots and drain irrigation lines. The payoff for getting through the cold start is a sunny day and a quick warmup headed into the weekend.
Freeze Warning Through Noon Saturday
The National Weather Service says the Freeze Warning is in effect through 12:00 p.m. MDT Saturday, April 18, for the northern Wasatch Front, Salt Lake Valley and nearby lowlands. Widespread lows in the mid 20s to around 30°F can damage crops and exposed pipes. The alert notes that frost and freeze conditions could kill sensitive vegetation and may harm unprotected outdoor plumbing. Expect the coldest readings around sunrise and in low-lying pockets, with sunshine and light afternoon winds helping temperatures rebound by midmorning.
Sunny Weekend And Rapid Warm Up
Once the freeze threat eases, mostly sunny skies will help temperatures climb fast. Highs are expected near 61°F Saturday, about 74°F on Sunday and close to 80°F on Monday, with low 80s likely Tuesday as high pressure takes over the region. Winds should stay generally light, with south to southeast afternoon breezes keeping conditions dry. Mornings will start off chilly, but afternoons will feel comfortably springlike, so outdoor plans are better saved for later in the day.
Midweek Unsettled Weather
A series of systems is expected to move through Wednesday into the latter part of next week, bringing a cooler trend and a growing chance for showers and thunderstorms. Wednesday’s high is forecast to slip back into the mid 60s with increased storm chances. Snow levels should remain well above valley floors, generally above 6,000 to 7,000 feet, so any valley precipitation is most likely to fall as rain or brief downpours. If you have weeknight outdoor plans, keep an eye on forecast updates since timing and thunderstorm potential could change.
How To Protect Plants And Pipes
To limit freeze damage, bring potted and tender plants indoors or cover them overnight, drain or winterize in-ground sprinkler systems and wrap exposed outdoor pipes. A few small precautions now can prevent expensive repairs later. For a quick refresher on simple steps, see our April freeze checklist with a short rundown. If you suspect frozen outdoor plumbing this morning, leave faucets slightly open to relieve pressure and contact a plumber if you see visible damage.
For commuters, watch for patchy frost and slick spots on bridges or shaded ramps during the first hours after sunrise, and give yourself a few extra minutes for morning travel. Updates will follow if warnings change, but for now expect cold starts followed by warm, sunny afternoons through early next week.
