February Heatwave: Phoenix Nears Record 90-Degree Mark Under Unseasonable Sun

A Scorching Thursday in the Valley

Residents of the Valley are waking up to a Thursday that feels more like early June than late February. Today, February 26, 2026, Phoenix is set to experience a significant heat spike, with temperatures forecasted to reach a staggering 90 to 91 degrees Fahrenheit. According to latest reports from the National Weather Service, a strong high-pressure ridge sitting over the Desert Southwest is driving these well-above-normal temperatures, pushing the mercury nearly 20 degrees higher than the historical average for this time of year.

Morning: A Brief Window of Cool

The day began with a relatively comfortable low of 61 degrees Fahrenheit around dawn. Sunrise occurred at 6:59 a.m., casting a golden glow over a partly cloudy sky. While the early morning hours provided a brief opportunity for outdoor exercise or commutes, the temperature is expected to climb rapidly as the morning progresses. By mid-morning, the valley floor will already be seeing temperatures in the mid-70s, signaling the arrival of the afternoon heatwave.

Afternoon: Peak Heat and Minor HeatRisk

Between 2:00 p.m. and 4:00 p.m., Phoenix will hit its peak temperature of 91 degrees. This unseasonable heat has triggered a 'Minor HeatRisk' alert across the lower deserts. Meteorologists warn that while this level of heat is manageable for most, it can pose risks to those who are sensitive to the sun or have not yet acclimated to the sudden jump in temperature. The sky will remain partly cloudy, though the cloud cover will offer little reprieve from the intensity of the sun. The UV Index is currently rated at a 3 (Moderate), meaning sunscreen is highly recommended for anyone spending more than fifteen minutes outdoors.

Evening: A Slow Transition to Night

As the sun sets at 6:22 p.m., the cooling process will be gradual. Evening temperatures will hover in the high 70s for several hours after dusk, finally settling back into the low 60s overnight. Winds are expected to remain light and variable, peaking at only 4 mph from the north, providing very little breeze to mitigate the stagnant heat. No precipitation is in the forecast, with a 0% chance of rain throughout the night.

Looking Ahead

The National Weather Service notes that while the end of February typically sees highs in the low 70s, this 90-degree threshold is part of a broader trend of record-breaking heat for the 2026 winter season. Valley residents are encouraged to stay hydrated and keep an eye on pets and elderly neighbors as this early-season heat continues through the weekend.