US weather today: Dallas, Chicago, Miami, Boston, Los Angeles and Washington DC forecast for September 26

Weather conditions across major US cities will vary sharply on Saturday, September 26, 2026. While Boston may see heavy rain and strong winds, hot and sunny conditions are likely to prevail in Los Angeles, and warm weather with air-quality concerns in Dallas. Chicago is set for comfortable temperatures, while Washington DC will see a breezy mix of sunshine and clouds.

Here is the weather forecast for Dallas, Chicago, Washington DC, Miami, Boston and Los Angeles, along with what residents can expect over the next seven days.

Dallas weather today: 36°C heat and poor air quality

Dallas is expected to remain very warm on September 26, with temperatures reaching 36°C and dropping to around 24°C overnight. The day will be partly sunny, with humidity around 61% and maximum winds of about 24 kmph.


Rain is unlikely, with only a 2% chance of precipitation. However, elevated ozone levels could lead to poor air quality. People who are sensitive to air pollution may want to limit strenuous outdoor activity, particularly during the hottest part of the afternoon.

The heat is expected to continue into the coming week, although temperatures will gradually fall. Dallas could see thunderstorms on several days, with the possibility of severe storms around September 30.

Chicago weather today: 19°C with partly sunny skies

Chicago will have much cooler and more comfortable conditions. The temperature is forecast to reach 19°C, with a low of about 13°C. Skies will be partly sunny, while humidity is expected to remain high at around 89%.

The chance of rain is just 1%, making Saturday favorable for outdoor activities. Winds could reach around 22.5 kmph, providing a light breeze.

Temperatures will remain relatively comfortable during the coming week, reaching around 22°C on September 29. Rain is expected to return around September 30 and October 1, when thunderstorms are also possible.

Washington DC weather today: Breezy with a 25% chance of rain

Washington DC is expected to see a mix of sunshine and increasing clouds on Saturday. The temperature will reach around 21°C, with an overnight low of 15°C.

There is a 25% chance of rain, although significant precipitation is not expected. The bigger factor will be the wind, which could reach approximately 45 kmph.

Temperatures will fluctuate considerably over the next seven days. After a cooler and potentially rainy Sunday, temperatures are expected to rise, reaching around 29°C on October 2. Another rainy day with a possible thunderstorm is forecast for October 3.

Miami weather today: 31°C with scattered showers

Miami will remain warm and humid, with temperatures reaching 31°C and falling to around 23°C overnight. Humidity is expected to reach 85%, giving the day a distinctly tropical feel.

The city has a 55% chance of rain, with scattered showers and possible thunderstorms developing during the afternoon. Winds could reach around 22.5 kmph.

The unsettled pattern is expected to continue through the coming week. Highs will remain between 29°C and 31°C, while showers and thunderstorms could occur on several days.

Boston weather today: Heavy rain and strong winds

Boston faces the most unsettled conditions among the cities in the forecast. Temperatures will remain between 13°C and 16°C, while the chance of rain is listed at 100%.

Heavy rain is expected at times, particularly during the afternoon, accompanied by strong winds. The combination could create difficult travel conditions and increase the risk of localized flooding.

Rain is expected to continue into September 27 and September 28, with flooding potentially remaining a concern. Conditions should gradually improve afterward, with temperatures climbing to around 24°C on October 2 as sunshine returns.

Los Angeles weather today: Sunny and warm at 32°C

Los Angeles is heading for a much drier and sunnier day. Temperatures are expected to climb to 32°C, with an overnight low of around 21°C.

No rain is expected, and the day should remain mostly sunny after some low clouds early in the morning. Humidity is forecast at around 92%, while winds will remain relatively light at about 16 kmph.

The warm and dry pattern is expected to continue throughout the next week. Highs will generally remain between 28°C and 31°C, with plenty of sunshine and very low chances of rain.

As per Accuweather, weather is likely to change in the upcoming week. Dallas and Miami are expected to remain warm and humid, while Chicago and Boston will gradually transition toward more comfortable conditions, and Washington DC will see temperatures rise before another chance of rain toward the end of the forecast period.

Source: AccuWeather.