Sunny Spells and Scorching Surprises: A Comprehensive Southwest Weather Forecast for July 23, 2025
By
Amy Freeze
Explore the diverse climate conditions swooping across Salt Lake City to Phoenix with our detailed weather breakdown.
Sunny skies dominate in Salt Lake City while Phoenix gears up for another heatwave. Check out what’s in store for your area!
Embrace the sun in Salt Lake City or prepare for heat in Phoenix; our detailed forecast explains all. Plus, watch out for potential rain in San Francisco and keep an eye on the mercury as it climbs across the Southwest. Stay prepared with our extensive analysis and safety tips.
Redding and Ely are experiencing some scattered showers, bringing a wet start to the afternoon. Salt Lake City remains partly sunny. In San Francisco, overcast skies are dominating, suggesting potential rain later in the day. Las Vegas and Phoenix continue to enjoy dry and clear conditions, perfect for outdoor activities.
Afternoon temperatures in Salt Lake City will rise to 88 degrees by 4 PM and peak at 90 degrees by 6 PM, with clear skies and ample sunshine. A light breeze from the west-northwest at 8 to 10 miles per hour will offer some relief from the heat. Skies will remain sunny, maintaining a dry and warm pattern into the early evening.
Temperatures are heating up in the Southwest today with Phoenix reaching a scorching 104 degrees. Las Vegas isn’t far behind at a sizzling 100 degrees, while most of California enjoys milder highs, with Fresno at 90 and Bakersfield slightly warmer at 92. San Diego remains cooler at 76, a stark contrast to the dry heat further inland. Flagstaff, while still in the region, is experiencing a much more refreshing 78 degrees, showcasing the diversity in today’s temperatures.
Tonight in the Southwest, expect a chilly drop in temperatures. Flagstaff will cool down to 48 degrees, while Ely sees a brisk low of 44. Las Vegas will be more temperate at 72 degrees, but San Francisco drops to 57. Over in Los Angeles, the low is forecasted at 61 degrees, ensuring a cooler night across the region.
Tomorrow in Phoenix, prepare for a scorching high of 106 degrees, well above the average for this time of year. Las Vegas will also experience a significant warm-up, reaching 101 degrees. In Bakersfield, temperatures will climb to 92 degrees, while Fresno will not be far behind at 90 degrees. San Diego will see a more moderate high of 77 degrees, providing some relief from the intense heat inland.
An active weather pattern is expected for the Southwest, with a cold front advancing eastward tomorrow. This system will bring widespread rain and thunderstorms from Southern California through Arizona, potentially impacting commute times in cities like Phoenix and Los Angeles. Keep an eye out for severe weather alerts, as conditions could lead to heavy rainfall and localized flooding, especially in areas with already saturated grounds. The desert areas will experience dropping temperatures, providing a temporary reprieve from the heat. By late Wednesday, clearing skies are anticipated across much of the region, ushering in drier conditions.
Salt Lake City is experiencing a very high UV index of 9 on both Wednesday and Thursday, with a burn time of about 15 minutes. It’s essential to protect your skin by applying broad-spectrum sunscreen, wearing a hat, and seeking shade during peak sun hours.