Check out our detailed weather forecast for Salt Lake City on the evening of July 20, 2025, for valuable insights before planning your night or week ahead! Visit our full guide here!

Looking at the weather forecast for Salt Lake City on July 20, 2025, residents and visitors can expect a warm evening with temperatures starting at 94 degrees and dipping to mid-80s by early morning. Be prepared and stay informed by exploring our comprehensive guide which covers daily insights and the complete 7-day forecast, showcasing how the weather will shift throughout the week in Salt Lake City and the broader Southwest region.
The Southwestern regional radar displays mainly clear conditions with isolated localized rain. Showers are evident near the Phoenix area, providing some respite from warmer conditions. Ely and the surrounding areas remain dry. No severe conditions are currently indicated across the major cities like Las Vegas and Los Angeles, keeping the region relatively stable.
For this evening in Salt Lake City, temperatures will initially hover around 94 degrees at 9 PM with mostly cloudy skies. By 11 PM, expect a shift to partly cloudy conditions and a dip to 88 degrees as the wind transitions from south-southwest at 9 mph to southeast. As the night progresses to 1 AM, temperatures will lower to 84 degrees with continued partly cloudy skies, and the wind will again move slightly to the south-southeast at the same speed.
Tonight in the Southwest, temperatures will drop significantly with Las Vegas hitting a low of 58 degrees. Phoenix will be warmer at 82 degrees, but it’s worth noting that Flagstaff will dip down to 51 degrees, showcasing a notable chill in the higher elevations. San Francisco will see a cool night with a low of 57 degrees, while Los Angeles remains relatively mild at 62 degrees. Expect some brisk air to settle in across the region.
Tomorrow, Phoenix is expected to sizzle at a scorching high of 103 degrees, with similar extreme conditions likely influencing the entire region. Las Vegas will also be hot, reaching 101 degrees, while Bakersfield warms up to 97 degrees. Expect Redding to edge towards 88 degrees, and Fresno will see a high of 94 degrees. Los Angeles remains cooler at 75 degrees, well below average for the season, as coastal influences keep temperatures in check.
A warm front is sweeping through the Southwest tomorrow, bringing elevated temperatures and clear skies, especially in the desert areas. In contrast, coastal regions of Southern California are facing a series of rain showers, making for potentially slippery conditions on roads. Be prepared for a surge of gusty winds accompanying any evening showers that might develop. The weather pattern remains relatively stable post-precipitation, with dry and sunny conditions expected to return later in the week. Areas from San Diego to Los Angeles should watch for localized flooding due to rain accumulation.
The UV index in Salt Lake City will be very high today and tomorrow, reaching a level of 9. With just 15 minutes to burn in direct sunlight, it’s important to protect your skin with sunscreen and wear protective clothing. Stay safe out there!
For the 7-day forecast in Salt Lake City: Sunday: Expect partly cloudy skies with a high of 95 degrees and a low of 73 degrees. Monday: Another partly cloudy day with a high reaching 92 degrees and a low around 71 degrees. Tuesday: Mostly clear skies with temperatures rising to a high of 91 degrees and a low of 68 degrees. Wednesday: Enjoy mostly clear conditions again with a high of 91 degrees and a low of 66 degrees. Thursday: Expect clear skies, with temperatures peaking at 91 degrees and dipping to 65 degrees overnight. Friday: Mostly clear conditions continue, with a daytime high of 93 degrees and a low of 67 degrees. Saturday: Clear skies to round off the week, with a high reaching 94 degrees and a low around 67 degrees. Enjoy the beautiful week ahead!