September weather forecast
District of Columbia, USA

September marks a transitional phase in the District of Columbia's weather, ushering in the early hints of autumn while gradually bidding farewell to the intense summer heat. Temperatures begin to recede, settling between the mid-70s°F and low 80s°F, offering a noticeable and welcome relief from the sweltering conditions of August.

The humidity, a mainstay of the city's summer, also starts to diminish, making the atmosphere more pleasant and comfortable. The clear, crisp air becomes more prevalent as the month progresses, hinting at the full onset of the fall season.

While rain showers do occur in September, they are typically less intense than the summer thunderstorms of previous months. The rainfall is more spread out, offering a gentle, nourishing touch to the region's flora, preparing it for the spectacular color transformation that awaits in October.

September's milder climate reinvigorates outdoor activities. The city's parks and recreational areas witness an uptick in visitors, with many choosing to engage in picnics, hikes, or leisurely strolls. The Potomac River, with its serene backdrop, becomes a favored spot for kayaking and other water-based activities.

As the days in September wane, the nights start to carry a slight chill, a precursor to the cooler months that lie ahead. In contrast to the warmer atmosphere of August, September offers a more balanced, temperate climate. This equilibrium is maintained throughout the District, ensuring that from its urban core to its outskirts, the onset of autumn is uniformly felt.

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• Washington - September »
  September temperatures vary between a high-temperature of 78.4°F (25.8°C) and a low-temperature of 61.9°F (16.6°C). In September, the average relative humidity is 74%.
• Shepherd Park - September »
  In September, the average relative humidity in Shepherd Park, District of Columbia, is 73%. In Shepherd Park, in September, it is raining for 12.4 days, with typically 2.2" (56mm) of accumulated precipitation.
• Colonial Village - September »
  On the first day of September in Colonial Village sunrise is at 6:37 am and sunset at 7:38 pm. In Colonial Village, in September, it is raining for 12.5 days, with typically 1.85" (47mm) of accumulated precipitation.
• Hawthorne - September »
  In Hawthorne during September, the rain falls for 12.4 days and regularly aggregates up to 2.2" (56mm) of precipitation. In September, the average relative humidity in Hawthorne, District of Columbia, is 73%.