Full Breakdown
Heat, Wind, and Monsoonal Moisture Expected Across Southern Nevada This Week
6/23/2026, 11:25:25 AM
Forecast Overview
KTNV’s short-range outlook shows Southern Nevada enduring a stretch of extreme heat, breezy to gusty southwest winds, and a modest chance of monsoonal showers from tonight through the weekend. Daily highs will linger in the low-100 °F range, isolated thunderstorms are possible Tuesday night into Wednesday, and a low-pressure system from the Pacific Northwest will amplify wind gusts later in the work week. Temperatures are projected to dip slightly toward the low 100 °F and high 90 °F range by next weekend.
Timeline of Key Weather Changes
- Tonight – Mostly clear; low 79 °F.
- Tomorrow (Tuesday) – Sunny and breezy; SW winds 5-10 mph, gusts up to 25 mph.
- Tuesday night – Wednesday morning – Arrival of monsoonal moisture; 10-30 % chance of rain in the valley, isolated thunderstorms possible.
- Wednesday – Partly cloudy; slight chance of showers before 11 AM; SW winds 10-15 mph, gusts up to 25 mph. High 106 °F.
- Thursday – High near 107 °F; wind gusts increase to 30 mph.
- Friday & Saturday – Continued gusty conditions (up to 30 mph) as the low-pressure system influences the region; temperatures remain in the low-100 °F range.
- Next weekend – Slight cooling toward the low 100 °F and high 90 °F range.
Data & Statistics
- Temperatures: Night low 79 °F; daytime highs 106-109 °F through Thursday; low-100 °F to high-90 °F expected by weekend.
- Wind: Southwest winds 5-15 mph with gusts up to 25 mph early in the week; gusts up to 30 mph Thursday-Saturday.
- Precipitation: 10-30 % chance of rain Tuesday night-Wednesday; isolated thunderstorms possible; higher rain probability noted for San Bernardino County to the southwest.
Background & Context
Two atmospheric features shape the week’s weather. First, monsoonal moisture moving northward on Tuesday night introduces a limited probability of rain and isolated thunderstorms. Second, a low-pressure system originating in the Pacific Northwest is expected to strengthen southwest wind flow, producing gusts up to 30 mph later in the work week. The forecast notes that the monsoonal moisture will be short-lived, limiting additional moisture after Wednesday.
Official Statements & Responses
KTNV’s weather team emphasizes that the high-temperature ridge will keep daily highs in the low-100 °F range, while the incoming low-pressure system will modestly lower temperatures toward the low 100 °F and high 90 °F by the weekend. The service notes that the monsoonal moisture will be brief, limiting further rain after Wednesday. Residents are advised to monitor the forecast for isolated thunderstorms and wind gusts, especially Thursday through Saturday.
Verbatim Quotes
- “TONIGHT: Mostly clear.” — KTNV Weather Report
- “SW winds in the afternoon 5-10mph, gusts up to 25mph.” — KTNV Weather Report
- “High: 109° WEDNESDAY: Partly cloudy with a slight chance of showers with isolated t-storms before 11AM.” — KTNV Weather Report
- “High: 106° Tuesday night into Wednesday morning we're tracking the arrival of monsoonal moisture.” — KTNV Weather Report
- “Windy weather ramps up later this work week with gusts up to 30mph Thursday, Friday, Saturday due to a low-pressure system in the Pacific Northwest.” — KTNV Weather Report
- “We will cool off slightly due to the influence of this system back towards the low 100s and high 90s by next weekend.” — KTNV Weather Report
Why It Matters
The convergence of extreme heat, gusty winds, and isolated thunderstorm potential can affect outdoor activities, travel, and local air quality. The brief monsoonal moisture raises the likelihood of short rain showers or virga, while the gusty southwest flow may increase wind-driven dust or debris. A higher rain probability for San Bernardino County highlights a regional contrast in precipitation potential.
What’s Next
KTNV will continue updating the forecast as the low-pressure system progresses and monsoonal moisture dissipates. Expect further guidance on wind advisories and any adjustments to rain probabilities later in the week.
