September 20 is statistically one of the best days of the year in Stone Town. With minimal rain risk (10%) and pleasant highs of 29°C, it's ideal for outdoor adventures. As it's peak season for Stone Town, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Stone Town
Currency
TZS
Sh Tanzanian shilling
Language
English
+1 more
Driving
Left side
Safety
Moderate Safety
GPI: 2.001
Stone Town Weather Forecast for September 20
"Warm & Sunny. Expect average highs of 29.2°C. 10% chance of rain."
What to Wear in Stone Town in September
Based on historical data for September 20, Stone Town typically experiences temperatures between 22.6°C and 29.2°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (10% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Stone Town
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
29.2°C
Daytime Peak
Average Low
22.6°C
Nighttime Low
Feels Like
34°C
🔥 Feels warmer
Rain Chance
10%
Avg 0.6mm if it rains
Cloud Cover
36%
Light drizzle
Pressure
1015.4 hPa
Low volatility
Stone Town Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 18 min to burn
Type III-IV
🟡 27 min to burn
Type V-VI
🟢 45 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
24.1°C
Humid/Sticky
Heat Index
34°C
Feels hotter
😐 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Jellyfish Warning
High water temps may attract jellyfish swarms.
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Tanzania
Flight Traffic
High
90/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~82
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Stone Town
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:15
☀️ Noon
12:18
🌇 Sunset
18:21
⏱️ Daylight
12h 5m
Wind Speed
18.7 km/h
Gentle breeze
Sunshine
11.2 hrs
Direct Sun (Cloud-free)
Humidity
74%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Stone Town
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 Stone Town
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 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
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Stone Town on September 20 averages 29.2°C with a 10% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Stone Town Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
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📍 Is Stone Town Worth Visiting on September 20?
Planning a trip to Stone Town on September 20? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 29.2°C with a 10% historical precipitation risk.
✈️ Travel Logistics: Approximately 82 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 10 vaccinations are recommended for Tanzania, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 26.7°C (tropical bath). Wave conditions are generally lake-like with heights around 0.42m.
📊 Historical Extremes: The hottest September 20 recorded in the last 30 years saw temperatures hit 31.4°C in 2023, while the coldest dropped to 21.2°C in 2022.