Pittsburgh's weather will vary, starting sunny with highs of 78 degrees, possibly facing showers and thunderstorms by Friday, and reverting to partial sunshine by the weekend.

Orlando expects a sunny week with highs around 90 degrees and mild evenings, with a slight chance of showers by the weekend, per the National Weather Service.

Baltimore forecast promises sunshine with 80°F highs, clear nights, and a mild breeze. Rain chances increase towards the weekend, with 80% likelihood on Saturday.

San Diego celebrated Earth Day by highlighting progress in its Climate Action Plan, aiming at net-zero emissions by 2035, with many initiatives already underway or completed.

Chicago's forecast includes rain and thunderstorms starting Tuesday, with variable weather conditions expected throughout the week, including potential hail and gusty winds. Temperatures will reach the high 60s and 70s.

Austin's weather forecast predicts a mix of overcast conditions, chances of showers and thunderstorms, fluctuating temperatures, and variable winds throughout the week, as per the National Weather Service.

Los Angeles weather forecasts show cooler temperatures with highs around 69 degrees, patchy drizzle, fog before 11am, and light southwest winds. Conditions will clear up midday, with similar patterns expected throughout the week.

Seattle enjoys sunny skies with temperatures hitting 60 degrees before a shift towards rain later in the week.

Portland's weather will start clear with temperatures in the mid-60s, becoming warmer but potentially rainy towards the weekend, with highs around 59 degrees.

The article provides weather forecasts for San Diego, detailing mild temperatures, a cooling trend, and minimal rain chances, with no hazardous marine weather or need for Skywarn activation.

Houston faces wet conditions with forecasts predicting showers and occasional thunderstorms throughout the week, alongside gusty winds and high humidity.

A low-pressure system from northwest of Hawai'i brings scattered showers and potential thunderstorms to O'ahu, with Kauai under a flood watch. Increased humidity and precipitation expected across the state.

The weather forecast for Detroit shows a mix of spring conditions, with sunny days, possible showers, and highs ranging from the mid-70s to lower temperatures towards the weekend.