Sunday morning, June 21, 2026, slid in cloudy, muggy, and already uncomfortable across Austin, with temperatures stuck in the mid-70s and dew points in the low 70s. The thick humidity is making the air feel heavy well before lunchtime and is priming the area for hotter afternoons and an even hotter start to the work week. If you have outdoor plans, you may want to push them into the cooler hours or be ready to take plenty of breaks.
Isolated Morning Storms, Then Heat Builds
There is a slight chance of showers and a few thunderstorms between about 7 a.m. and 1 p.m. on Sunday, June 21, although most of the area is expected to stay dry, with sticky air more likely than widespread rain. According to the National Weather Service, highs today should reach near 93°F with heat index values topping out around 100°F. Conditions climb on Monday, June 22, when highs are forecast near 96°F and heat index readings could jump into the 108 to 109°F range, levels the NWS says may trigger a Heat Advisory for parts of the Coastal Plains. South winds will start off light in the morning and then increase to around 10 mph, with gusts that could reach about 25 mph during the midday and afternoon.
Cooling Options And Safety
City-run libraries and parks can function as cooling centers during their normal business hours. Check the City of Austin emergency hub for locations, hours, and heat safety tips before you head out. If you have to be outside, try to avoid strenuous activity in the middle of the day, drink plenty of water, wear lightweight clothing, and check in on older neighbors, young children, and anyone without reliable air conditioning.
What To Expect This Week
An upper-level ridge is expected to hold through the work week, keeping the region dry and warm with afternoon highs generally in the mid to upper 90s and overnight lows in the mid-70s. It is a good idea to shift heavy yard work or construction to the early morning or evening hours and to check the latest forecast before heading out. Monday, June 22, 2026, is still the main day to watch for any potential heat-related advisories.
