July 9 is generally a great time to visit Nantucket. While there is a slight chance of rain (15%), showers are usually brief. Expect comfortable 20°C weather. It's a lively time to explore Nantucket, with most attractions operating at full capacity.
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Essential Travel Info for Nantucket
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Safety
Moderate Safety
GPI: 2.44
Nantucket Weather Forecast for July 9
"Mild & Comfortable. Expect average highs of 20.3°C. 15% chance of rain."
What to Wear in Nantucket in July
Based on historical data for July 9, Nantucket typically experiences temperatures between 18.6°C and 20.3°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (15% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Nantucket
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
20.3°C
Daytime Peak
Average Low
18.6°C
Nighttime Low
Feels Like
20.4°C
☀️ Feels accurate
Rain Chance
15%
Avg 0.9mm if it rains
Cloud Cover
56%
Overcast
Pressure
1014.7 hPa
Low volatility
Nantucket Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 100% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
04:00 - 10:00
16:00 - 19:00
Type I-II
🔴 16 min to burn
Type III-IV
🟡 24 min to burn
Type V-VI
🟢 40 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
18.6°C
Noticeable
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
Busy
68/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~96
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Nantucket
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:16
☀️ Noon
11:46
🌇 Sunset
19:16
⏱️ Daylight
14h 59m
Wind Speed
27.5 km/h
Moderate wind
Sunshine
11.1 hrs
Direct Sun (Cloud-free)
Humidity
90%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Nantucket
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Nantucket
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
Atlantic Hurricane Risk
Season: Jun - Nov
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Nantucket on July 9 averages 20.3°C with a 15% precipitation probability. Wedding/Outdoor Event Score: 92/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Nantucket Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
July 14
20.8°C • 15% rain
Score
98
July 15
20.9°C • 15% rain
Score
98
July 6
20°C • 16% rain
Score
94
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (July 9) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Nantucket Worth Visiting on July 9?
Planning a trip to Nantucket on July 9? 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 20.3°C with a 15% historical precipitation risk.
✈️ Travel Logistics: Approximately 96 landing slots available daily during this period, indicating manageable crowd levels.
📊 Historical Extremes: The hottest July 9 recorded in the last 30 years saw temperatures hit 22.1°C in 2021, while the coldest dropped to 16.7°C in 2016.