August 21 sees frequent showers in Hamilton. Historical data shows a 42% chance of rain, so pack accordingly. Temperatures average 14°C. Expect a bustling atmosphere in Hamilton right now—this is when the city truly comes alive with visitors.
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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 August 21
"Mild & Comfortable. Expect average highs of 13.8°C. 42% chance of rain."
What to Wear in Hamilton in August
Based on historical data for August 21, Hamilton typically experiences temperatures between 6.1°C and 13.8°C. We recommend packing heavy coat, scarf, gloves along with other layers to stay comfortable. With a 42% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Hamilton
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
- Umbrella
Average High
13.8°C
Daytime Peak
Average Low
6.1°C
Nighttime Low
Feels Like
13.3°C
🌤️ Feels accurate
Rain Chance
42%
Avg 2.7mm if it rains
Cloud Cover
59%
Overcast
Pressure
1014.9 hPa
High volatility
Hamilton 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 15 for extended outdoor time
Type I-II
🔴 57 min to burn
Type III-IV
🟡 86 min to burn
Type V-VI
🟢 143 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
11°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
High
85/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~11
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Hamilton
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:58
☀️ Noon
13:23
🌇 Sunset
18:49
⏱️ Daylight
10h 50m
Wind Speed
21.2 km/h
Moderate wind
Sunshine
7.8 hrs
Direct Sun (Cloud-free)
Humidity
83%
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
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Weather unlikely to affect joint pain.
Fish are active due to pressure changes.
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 August 21 averages 13.8°C with a 42% precipitation probability. Wedding/Outdoor Event Score: 77/100."
— 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
August 26
14.4°C • 30% rain
Score
85
August 25
14.2°C • 29% rain
Score
84
August 27
14.4°C • 31% rain
Score
84
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Hamilton Worth Visiting on August 21?
Planning a trip to Hamilton on August 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 13.8°C with a 42% historical precipitation risk.
✈️ Travel Logistics: Approximately 11 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 August 21 recorded in the last 30 years saw temperatures hit 18.4°C in 2022, while the coldest dropped to 1.9°C in 2025.