Hamilton, New Zealand experiences average highs of 18°C (64°F) and lows of 11°C (52°F) throughout the year. Rainfall is moderate, averaging about 12 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have stayed broadly stable across the available records.
Hamilton, New Zealand Weather & Climate 2026
Monthly climate averages for Hamilton, New Zealand. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Jul–Nov At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.8/10
Best: January, February, March
UV Index
5
Low
Temperature 18°C / 11°C
Feels Like 17°C / 9°C
Rainy Days 12
Rainfall 106 mm
Sunshine 9 h
Humidity 81%
Wind Speed 21 km/h
Dew Point 11°C
Frost Days 2 days
Hottest Month
24°C
February
Avg Low15°C
Rain8days
Coldest Month
6°C
August
Avg High14°C
Rain14days
Driest Month
8days
February
Avg High24°C
Avg Low15°C
Windiest Month
25 km/h
September (Gusts 48)
Worst Time to Visit
Consider avoiding June, July, August, September due to frequent rain.
Sun Position
Sunrise 07:34
Daylight 9.6h
Sunset 17:07
Live conditions—
Hamilton on the map · live conditions
Hamilton, New Zealand
- Continent
- Oceania
- Country
- New Zealand
- City
- Hamilton
- Population
- 189.7K
- Coordinates
- -37.78°, 175.28°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 17°C
Avg Low 10°C
Rain 14 days/mo
Summer
Dec–Feb
Avg High 23°C
Avg Low 15°C
Rain 10 days/mo
2/3 best months
Autumn
Mar–May
Avg High 19°C
Avg Low 11°C
Rain 10 days/mo
1/3 best months
Winter
Jun–Aug
Avg High 14°C
Avg Low 7°C
Rain 13 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 23°C / 15°C . Feb: 24°C / 15°C . Mar: 22°C / 13°C . Apr: 19°C / 11°C . May: 17°C / 9°C . Jun: 14°C / 7°C . Jul: 14°C / 7°C . Aug: 14°C / 6°C . Sep: 15°C / 8°C . Oct: 17°C / 10°C . Nov: 20°C / 12°C . Dec: 22°C / 14°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 83 mm. Feb: 92 mm. Mar: 82 mm. Apr: 90 mm. May: 108 mm. Jun: 101 mm. Jul: 140 mm. Aug: 124 mm. Sep: 131 mm. Oct: 109 mm. Nov: 109 mm. Dec: 102 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 76%. Mar: 77%. Apr: 81%. May: 84%. Jun: 86%. Jul: 86%. Aug: 84%. Sep: 82%. Oct: 81%. Nov: 80%. Dec: 78%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 22 km/h . Feb: 19 km/h . Mar: 19 km/h . Apr: 20 km/h . May: 20 km/h . Jun: 20 km/h . Jul: 22 km/h . Aug: 21 km/h . Sep: 25 km/h . Oct: 24 km/h . Nov: 22 km/h . Dec: 22 km/h .
Sunshine
Sunshine
Sunshine: Jan: 11h. Feb: 10h. Mar: 10h. Apr: 8h. May: 7h. Jun: 7h. Jul: 7h. Aug: 8h. Sep: 9h. Oct: 10h. Nov: 11h. Dec: 11h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 8. Mar: UV 6. Apr: UV 4. May: UV 3. Jun: UV 3. Jul: UV 3. Aug: UV 4. Sep: UV 5. Oct: UV 7. Nov: UV 8. Dec: UV 8.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 20 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Feb 2025 · 25°C | Feb · 24°C |
| Coldest month | Aug 2025 · 5°C | Aug · 6°C |
| Wettest month | Jul 2025 · 206 mm | Jul · 140 mm |
| Windiest month | Oct 2025 · 29 km/h | Sep · 25 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March best
Excellent April
Good May
Good June
Fair July
Fair August
Fair September
Fair October
Good November
Good December
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 23°C / 15°C | 24°C / 15°C | 9days (83 mm) Wet | 11.1h Excellent | 76% Humid | 8 Very High | Excellent | View Details |
| February best | 24°C / 15°C | 24°C / 15°C | 8days (92 mm) Wet | 10.3h Excellent | 76% Humid | 7.6 Very High | Excellent | View Details |
| March best | 22°C / 13°C | 22°C / 13°C | 8days (82 mm) Wet | 9.5h Good | 77% Humid | 6.1 High | Excellent | View Details |
| April | 19°C / 11°C | 18°C / 10°C | 11days (90 mm) Wet | 8.2h Good | 81% Humid | 4.3 Moderate | Good | View Details |
| May | 17°C / 9°C | 15°C / 7°C | 12days (108 mm) Wet | 7.3h Good | 84% Humid | 3.2 Moderate | Good | View Details |
| June | 14°C / 7°C | 12°C / 5°C | 12days (101 mm) Wet | 6.8h Fair | 86% Very Muggy | 2.5 Moderate | Fair | View Details |
| July | 14°C / 7°C | 11°C / 4°C | 14days (140 mm) Wet | 7h Good | 86% Very Muggy | 2.7 Moderate | Fair | View Details |
| August | 14°C / 6°C | 12°C / 4°C | 14days (124 mm) Wet | 7.9h Good | 84% Humid | 3.7 Moderate | Fair | View Details |
| September | 15°C / 8°C | 13°C / 6°C | 15days (131 mm) Wet | 8.6h Good | 82% Humid | 5 Moderate | Fair | View Details |
| October | 17°C / 10°C | 16°C / 8°C | 13days (109 mm) Wet | 9.5h Good | 81% Humid | 6.5 High | Good | View Details |
| November | 20°C / 12°C | 19°C / 11°C | 13days (109 mm) Wet | 10.7h Excellent | 80% Humid | 7.5 Very High | Good | View Details |
| December | 22°C / 14°C | 22°C / 13°C | 12days (102 mm) Wet | 11.1h Excellent | 78% Humid | 7.9 Very High | Good | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Hamilton are January, February, March, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Hamilton, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Hamilton is February, with average daytime highs of 24°C (75°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Hamilton is August, with average overnight lows of 6°C (43°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Hamilton is July, averaging 140mm of precipitation across 14 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Hamilton runs through September, July, August, October, with the heaviest rainfall in September. Based on 10-year averages for Hamilton.
Hamilton receives approximately 108 sunshine hours per year. The sunniest month is January with around 11 hours. Based on climate data for Hamilton.
The least favorable months to visit Hamilton are June, July, August, September, primarily due to frequent rain. For the best conditions, consider January, February, March instead.
The annual average UV index in Hamilton is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Hamilton is 81%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Hamilton rarely sees significant snowfall but does experience frost, averaging 2 frost days during the colder months.
Average wind speeds in Hamilton are 21 km/h (13 mph). The windiest month is September with peak winds reaching 25 km/h (16 mph) (gusts up to 48 km/h / 30 mph).
Hamilton averages 2 clear-sky days per month with overall cloud cover around 63%. The clearest skies occur in May.
The annual average dew point in Hamilton is 11°C (52°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Hamilton has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Hamilton ranges from 9°C (48°F) to 17°C (63°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
June is not the best time to visit Hamilton, with a climate score of 5.5/10. Consider visiting during January, February, March instead for better conditions.
For June in Hamilton, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Comfortable walking shoes. With average highs of 14°C (58°F) and 12 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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