Weather In Paris In September Average

September is a transitional month for Paris, where the summer heat begins to fade and the early autumn chill starts to settle. If you’re planning a trip to Paris and want to know what to expect weather-wise, this guide gives you the essential numbers and practical tips to make the most of your visit.

September Weather Overview

Paris in September is often described as the city’s “golden hour” of weather. The days are still warm enough for outdoor activities, yet the crowds start to thin out, providing a more relaxed atmosphere.

Average Temperatures

Highs: 20 °C (68 °F)
Lows: 12 °C (54 °F)
Average daytime temperature: 16 °C (61 °F)

Precipitation

September sees a moderate amount of rainfall, with an average of 50 mm spread over 8–10 days. Showers are typically brief, so a light rain jacket can be handy.

Humidity and Wind

Humidity levels are comfortable, usually between 60–70%. Winds are light to moderate, coming from the west or southwest, rarely exceeding 15 km/h.

What to Wear in Paris in September

Layering is key because temperatures can fluctuate from morning to evening. Below is a packing list that covers the range of conditions you’ll encounter.

Light Sweater or Cardigan: Ideal for cooler mornings and evenings.
T-shirts and Blouses: Comfortable for daytime exploration.
Long‑sleeve Top: Useful if you plan to visit museums or dine indoors.
Comfortable Walking Shoes: Paris streets are best explored on foot.
Rain Jacket or Compact Umbrella: A quick shower can happen at any time.
Scarf or Light Shawl: Adds warmth and style in cooler moments.
Accessories: Sunglasses, hat, and a small backpack for daily essentials.

Best Time to Visit Paris in September

While the entire month offers pleasant conditions, certain weeks stand out:

Early September (1–10th): Slightly warmer and still high tourist traffic.
Mid September (11–20th): Ideal balance of warmth and lower crowds.
Late September (21st onward): Cooler temperatures but a quieter city and shorter museum queues.