September 21 is generally a great time to visit Nice. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 23°C weather. Nice is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Nice
Currency
EUR
€ Euro
Language
French
Driving
Right side
Connect
As of Sept 2021, Nice has 5G from all Fr...
Safety
High Safety
GPI: 1.895
Nice Weather Forecast for September 21
"Mild & Comfortable. Expect average highs of 23.3°C. 20% chance of rain."
What to Wear in Nice in September
Based on historical data for September 21, Nice typically experiences temperatures between 17°C and 23.3°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (20% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Nice
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
23.3°C
Daytime Peak
Average Low
17°C
Nighttime Low
Feels Like
23.8°C
☀️ Feels accurate
Rain Chance
20%
Avg 1.2mm if it rains
Cloud Cover
47%
Overcast
Pressure
1015.8 hPa
Medium volatility
Nice Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 84% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 28 min to burn
Type III-IV
🟡 42 min to burn
Type V-VI
🟢 70 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
18°C
Noticeable
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in France
Flight Traffic
High
96/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~205
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Nice
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:17
☀️ Noon
12:25
🌇 Sunset
18:33
⏱️ Daylight
12h 15m
Wind Speed
10.3 km/h
Light breeze
Sunshine
9.9 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Nice
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Nice
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Nice on September 21 averages 23.3°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 98/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Nice Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 17
24.1°C • 15% rain
Score
100
September 18
23.9°C • 14% rain
Score
100
September 19
23.8°C • 15% rain
Score
100
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 21) in other destinations
Prague
Czech Republic
Paris
France
Rome
Italy
London
United Kingdom
Amsterdam
Netherlands
🌍 Explore the same date in different destinations around the world
📍 Is Nice Worth Visiting on September 21?
Planning a trip to Nice on September 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 23.3°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 205 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for France, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 24°C (swimming pool). Wave conditions are generally fun waves with heights around 0.64m.
📊 Historical Extremes: The hottest September 21 recorded in the last 30 years saw temperatures hit 28°C in 2018, while the coldest dropped to 12°C in 2017.