Wondering about the weather in Salt Lake City and the Southwest? Dive into our blog for clear skies and scorching temperatures, and learn how to stay safe under the hot summer sun!

Welcome to your comprehensive guide on Salt Lake City’s weather and the broader Southwest’s climate conditions as of July 20, 2025. From clear morning skies and rising temperatures to potential thunderstorms due to a low-pressure trough, our blog walks you through each day’s forecast with precision. We also highlight crucial sun safety tips due to the very high UV index. Enjoy a detailed look into the next seven days in Salt Lake City, designed to help you plan ahead effectively and safely. Read the full story here: https://amyfreeze.ai/
On the Regional Radar, scattered showers are seen over southern Arizona, creating some cloud cover and light rain around Phoenix. Flagstaff is observing partly cloudy conditions with cool temperatures but no precipitation at present. Overall, the rest of the Southwest, including Los Angeles, Las Vegas, and San Francisco, is experiencing clear skies and dry conditions, making for a pleasant evening. Ely also enjoys clear skies, providing stable weather as we head into the night.
Tomorrow morning in Salt Lake City starts off clear, with temperatures at 76 degrees by 8 AM. A south-southeast breeze at 11 mph will provide gentle movement in the air. By 10 AM, expect mostly sunny conditions as the temperature rises to 78 degrees with slightly stronger winds at 13 mph from the same direction. Heading towards noon, the weather remains mostly sunny with temperatures continuing to climb to 83 degrees and a steady south wind at 16 mph.
Tomorrow in Phoenix, expect a sizzling high of 103 degrees, well above average for this time of year. Las Vegas will also be hot, reaching 101 degrees under plenty of sunshine. In Bakersfield, temperatures will climb to 97 degrees, making for a warm day across California’s Central Valley. San Diego will see cooler conditions with a high of 73 degrees, providing some relief from the heat. San Francisco will peak at a mild 63 degrees, influenced by coastal breezes.
A trough of low pressure will move into the Southwest, bringing a cooling trend and a chance of thunderstorms. Expect isolated showers and gusty winds across Arizona and New Mexico by late afternoon. Temperatures will drop several degrees, with highs reaching the low 90s in deserts and mid-80s across the upper elevations. The Pacific coast will remain mostly dry, but increased cloud cover could blanket inland areas as moisture surges northward. Flash flood warnings may be issued in areas with locally heavy rainfall.
The UV index in Salt Lake City is very high today with a value of 9, resulting in a burn time of just 15 minutes in direct sunlight. Ensure you apply a broad-spectrum sunscreen, wear protective clothing, and seek shade during midday. The UV index remains high at 9 for Monday, with the same short burn time, so continue to take sun safety precautions!
Here’s the 7-day outlook for Salt Lake City: Sunday: Partly cloudy skies with highs reaching 95 degrees and lows around 72 degrees. Monday: Expect partly cloudy conditions with a high of 92 degrees and a low of 71 degrees. Tuesday: Enjoy clear skies with the temperature soaring to 90 degrees, cooling down to 68 degrees at night. Wednesday: Clear and sunny once again, with daytime highs of 91 degrees and nighttime lows of 66 degrees. Thursday: Mostly clear conditions, with a high of 91 degrees and a low of 65 degrees. Friday: The weather remains mostly clear, with temperatures peaking at 93 degrees and dipping to 67 degrees overnight. Saturday: Look forward to mostly clear skies with a high of 94 degrees and a low of 67 degrees.