Monsoon Mayhem Hits Vegas Valley: Sudden Storms Erupt
Las Vegas Weather Update: Storms, Cooling Down, and Summer Records
What Happened This Week?
Imagine the weather like a moody teenager—one day it’s scorching hot, the next it’s throwing tantrums (thunderstorms), and then it finally calms down. That’s exactly what Las Vegas experienced recently!
Wednesday’s Surprise Storms
- Monsoon moisture moved in (that’s just a fancy term for "wet air from the south that brings summer storms")
- Thunderstorms soaked parts of the valley on Wednesday afternoon
- Harry Reid International Airport (the main airport) only got a trace of rain—barely enough to wet the pavement
- But the airport still hit 101°F and had flight delays up to 45 minutes
Important Point: A "trace" of rain means some fell, but not enough to measure (less than 0.01 inches). It’s like when you sprinkle a few drops of water on a cookie—technically it’s wet, but you wouldn’t call it "rain."
How Much Rain Fell Where?
The Regional Flood Control District (the folks who watch for flooding) reported these totals:
| Location | Rainfall |
|---|---|
| Nellis Air Force Base | 0.78 inches |
| East Las Vegas | 0.51 inches |
| Centennial Hills | 0.31 inches |
| Henderson (near Burkholder Middle School) | 0.24 inches |
| UNLV | 0.12 inches |
| North Las Vegas | 0.08 inches |
| Harry Reid Airport | Trace only |
Important Point: Nellis AFB got the most rain—almost an inch! That’s like a decent watering for your garden. The airport missing out shows how spotty summer storms can be—one neighborhood gets drenched while the next stays bone dry.
The Long Dry Streak Is Over (Sort Of)
- 124 days without measurable rain at the airport (since June 23)
- That June 23 rain was only 0.02 inches—barely a sip!
- July only had a trace on the 19th
- August average is 0.32 inches, but 2025 only saw a trace
Think of it like a camel going months without water, then finally getting a few drops.
Good News: A Cooldown Is Coming!
Numbered Steps: What to Expect
- Thursday: High of 97°F — first time below 100°F since July 17!
- Friday: Rain chances jump to 50% (up from 15% Thursday)
- Weekend: Temperatures stay below the normal 104°F
- Cause: A low-pressure system from the Pacific Ocean (think of it as a big bubble of cooler air rolling in)
Important Point: "Low-pressure system" = weather maker that brings clouds, wind, and often rain. It’s nature’s air conditioner!
Summer 2025: By the Numbers
Here are the standout stats from this sizzling summer:
- Hottest day: August 1 — 115°F at the airport (just 1° shy of the all-time record from 1979 and 1938)
- July: 3rd warmest on record — average temp of 96.6°F
- July 29: Morning low only 89°F — ended a 6-day streak of lows at or above 90°F (longest ever recorded!)
- First 110°F day: July 8
- July 110°F+ days: 12 days (normal for the whole year is 10; 2024 set a record with 36!)
Important Point: Nighttime temperatures matter! When it doesn’t cool below 90°F at night, buildings and bodies can’t recover from the day’s heat. That 6-day streak was dangerous.
Summary
Las Vegas got a taste of monsoon storms this week—some neighborhoods got a good soaking while the airport stayed mostly dry, ending a 124-day measurable rain drought. The best news? A Pacific low-pressure system is bringing the first sub-100°F day since mid-July, with decent rain chances by Friday. Summer 2025 has been a record-breaker for heat, especially July, which ranked 3rd hottest ever. Stay cool, and keep an umbrella handy for Friday!
FAQ
Q: What is "monsoon moisture" anyway?
A: It’s not a season—it’s a wind pattern shift. In summer, winds bring humid air from the Gulf of California and Mexico into the Southwest. When that moist air hits our hot mountains, it pops up into thunderstorms. Think of it like a humidifier plugged into the sky.
Q: Why did Nellis AFB get 0.78 inches while the airport got almost nothing?
A: Summer storms are like popcorn—they pop up in small, intense cells. One storm can dump rain on one neighborhood and miss the next entirely. The airport is just one spot; the Flood Control District has gauges all over to catch the full picture.
Q: Is 115°F dangerous?
A: Yes! At 115°F, heat exhaustion can hit in minutes if you’re outside without shade, water, or acclimation. That’s why cooling centers open, and why nighttime lows above 90°F are so risky—your body never gets a break.
Q: What does "low-pressure system" mean for my weekend plans?
A: Cooler temps (yay!), more clouds, and a decent shot at rain Friday. Great for hiking early or patio dining—just keep a light jacket and rain plan handy.
Q: How does 2025 compare to 2024’s heat?
A: 2024 was extreme—36 days at 110°F+ (a record). 2025 had 12 such days in July alone, which is above the annual average of 10. So: hot, but not record-shattering hot… yet.