Explore the evening weather prospects for Salt Lake City with updates on temperatures and storm activities across the Southwest. Essential reading for your night plans.

As you step out in Salt Lake City on the evening of July 16, 2025, expect a variety of weather patterns across the Southwest. From the isolated thunderstorms in Arizona to the clear skies over California, our comprehensive guide provides all the details. Plus, an in-depth look into the forecast temperatures and how they impact your night activities. Stay safe and informed with our detailed weather analysis and tips.
Across the Southwest, the radar shows isolated thunderstorms developing over southeastern Arizona, with Phoenix experiencing some storm activity. Areas around Flagstaff might encounter light rain and cooler temperatures as scattered showers move in. The California coastline, from San Diego up to San Francisco, remains clear, offering dry conditions throughout. Ely and areas north towards Salt Lake City show no precipitation, maintaining clear skies.
For this evening in Salt Lake City, temperatures start at 92 degrees at 9 PM, dropping to 86 degrees by 11 PM. Wind shifts from north northwest at 8 miles per hour to north northeast before settling southeast at 8 miles per hour by 1 AM. The sky is clear initially, becoming partly cloudy as the night progresses. Overall, expect a warm, slightly breezy evening.
Tonight in the Southwest, temperatures will be dipping significantly. Los Angeles is expected to fall to 63 degrees, while San Diego will chill to 66. Las Vegas will see a low of 58, and Flagstaff is forecasted to drop to a brisk 52 degrees. Ely is one of the cooler spots, hitting 55 degrees.
Tomorrow in the Southwest, Phoenix will be sizzling with a high of 100 degrees, well above average for this time of year. Las Vegas also warms up to a sunny 95, keeping in line with the hot desert conditions. Bakersfield will see highs reaching 99 degrees, making it a particularly steamy day there. Fresno will not be far behind with temperatures hitting 98 degrees. In contrast, coastal regions like San Francisco are significantly cooler at 66 degrees, influenced by marine layers pushing in.
A weak cold front will bring some changes to the Southwest by Wednesday evening. Mostly clear skies and warm temperatures span across Arizona and New Mexico, while scattered showers and thunderstorms develop over southeastern Utah. Potential for strong wind gusts in areas with thunderstorms, so travel with caution. Temperatures will remain elevated, hovering around the high 90s for much of the region during the day, with a drop overnight.
The UV index in Salt Lake City is expected to be very high at 9 on Wednesday and Thursday, with a burn time of approximately 15 minutes in direct sunlight. It’s important to take safety precautions such as applying sunscreen generously and wearing protective clothing to shield from intense UV rays.
Wednesday: Expect partly cloudy skies with a high of 94 degrees and a low of 70 degrees. Thursday: Partly cloudy again, with highs reaching 94 degrees and a low of 72 degrees. Friday: Cooler temperatures and partly cloudy skies, with a high of 89 degrees and a nighttime low of 67 degrees. Saturday: Mostly clear skies, warming up to a high of 90 degrees, and the low dipping to 69 degrees. Sunday: A beautiful day with mostly sunny conditions, the high reaching 93 degrees, and a low around 70 degrees. Monday: Partly cloudy with a high of 93 degrees during the day and a mild low of 71 degrees at night. Tuesday: Partly cloudy once more, with a high of 93 degrees and a low of 68 degrees.