Historical data suggests significant rain risk (74%) on September 9. If you seek sun, consider a different date. Bring rain gear! You'll find plenty of company in Chiang Mai this month as tourism activity remains quite robust.
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Essential Travel Info for Chiang Mai
Currency
THB
฿ Thai baht
Language
Thai
Driving
Left side
Connect
Many guesthouses, hotels, cafes, bars, r...
Safety
Moderate Safety
GPI: 2.098
Chiang Mai Weather Forecast for September 9
"Rainy & Overcast. Expect average highs of 29.1°C. 74% chance of rain."
What to Wear in Chiang Mai in September
Based on historical data for September 9, Chiang Mai typically experiences temperatures between 23.2°C and 29.1°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 74% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Chiang Mai
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
29.1°C
Daytime Peak
Average Low
23.2°C
Nighttime Low
Feels Like
36.7°C
🔥 Heat index effect
Rain Chance
74%
Avg 8.7mm if it rains
Cloud Cover
90%
Moderate rain
Pressure
1007.8 hPa
Low volatility
Chiang Mai Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 91% 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
🔴 36 min to burn
Type III-IV
🟡 54 min to burn
Type V-VI
🟢 90 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
26.7°C
Humid/Sticky
Heat Index
36.7°C
Feels hotter
😕 Best outdoor time:
Morning hours (before 11 AM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Thailand
Flight Traffic
Busy
66/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~70
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Chiang Mai
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:12
☀️ Noon
12:23
🌇 Sunset
18:34
⏱️ Daylight
12h 22m
Wind Speed
6.7 km/h
Light breeze
Sunshine
7.4 hrs
Direct Sun (Cloud-free)
Humidity
87%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Chiang Mai
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in Chiang Mai
Travel Comfort Index
Real-time tourism conditions
Weather Quality
🌧️ Variable
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Chiang Mai on September 9 averages 29.1°C with a 74% precipitation probability. Wedding/Outdoor Event Score: 53/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Chiang Mai Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 4
29.7°C • 55% rain
Score
68
September 3
29.7°C • 57% rain
Score
66
September 5
29.7°C • 57% rain
Score
66
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 9) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Chiang Mai Worth Visiting on September 9?
Planning a trip to Chiang Mai on September 9? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 29.1°C with a 74% historical precipitation risk.
✈️ Travel Logistics: Approximately 70 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 11 vaccinations are recommended for Thailand, including COVID-19.
📊 Historical Extremes: The hottest September 9 recorded in the last 30 years saw temperatures hit 30.2°C in 2023, while the coldest dropped to 22.7°C in 2022.