September 25 is generally a great time to visit Hamilton. While there is a slight chance of rain (33%), showers are usually brief. Expect comfortable 16°C weather. Hamilton is seeing high visitor numbers, so iconic spots may be busier than usual.
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Essential Travel Info for Hamilton
Currency
NZD
$ New Zealand dollar
Language
English
+2 more
Driving
Left side
Safety
Very High Safety
GPI: 1.269
Hamilton Weather Forecast for September 25
"Mild & Comfortable. Expect average highs of 16°C. 33% chance of rain."
What to Wear in Hamilton in September
Based on historical data for September 25, Hamilton typically experiences temperatures between 8.6°C and 16°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 33% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Hamilton
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
16°C
Daytime Peak
Average Low
8.6°C
Nighttime Low
Feels Like
16°C
🌤️ Feels accurate
Rain Chance
33%
Avg 2.6mm if it rains
Cloud Cover
66%
Overcast
Pressure
1016 hPa
Medium volatility
Hamilton Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 86% 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
🔴 31 min to burn
Type III-IV
🟡 47 min to burn
Type V-VI
🟢 78 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.9°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in New Zealand
Flight Traffic
Busy
77/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~10
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Hamilton
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:06
☀️ Noon
13:12
🌇 Sunset
19:18
⏱️ Daylight
12h 12m
Wind Speed
22.2 km/h
Moderate wind
Sunshine
8.6 hrs
Direct Sun (Cloud-free)
Humidity
82%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Hamilton
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Hamilton
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
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
Active seismic zone. Multiple earthquakes per year.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Hamilton on September 25 averages 16°C with a 33% precipitation probability. Wedding/Outdoor Event Score: 80/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Hamilton Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 25) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Hamilton Worth Visiting on September 25?
Planning a trip to Hamilton on September 25? 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 16°C with a 33% historical precipitation risk.
✈️ Travel Logistics: Approximately 10 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for New Zealand, including COVID-19.
📊 Historical Extremes: The hottest September 25 recorded in the last 30 years saw temperatures hit 19.6°C in 2022, while the coldest dropped to 5.9°C in 2024.