Weather by Month - Hamilton

Hamilton experiences distinct seasons, with warm February days averaging 23°C / 74°F and cool July nights dropping to 5°C / 42°F. Rainfall averages 101 mm / 4 in per month, with July typically the wettest. December offers the longest days with around 15 hours of daylight.

Temperature Comparison

Month Low Temperature High Temperature Category
January warm
February warm
March mild
April mild
May mild
June cool
July cool
August cool
September mild
October mild
November mild
December mild

Rain & Sunshine Patterns

Driest Months

#1 March
Best for: outdoor activities & sightseeing
#2 February
Best for: outdoor activities & sightseeing
#3 January
Best for: outdoor activities & sightseeing

Wettest Months

#1 July
Expect: possible showers, pack waterproofs
#2 June
Expect: possible showers, pack waterproofs
#3 August
Expect: possible showers, pack waterproofs

UV & Sun Protection Calendar

High UV Alert:
January, February, March, September, October, November, December require serious sun protection.
Jan
9
VERY-HIGH
Feb
9
VERY-HIGH
Mar
8
HIGH
Apr
6
MODERATE
May
4
MODERATE
Jun
3
MODERATE
Jul
3
MODERATE
Aug
5
MODERATE
Sep
6
HIGH
Oct
8
HIGH
Nov
9
VERY-HIGH
Dec
9
VERY-HIGH
Extreme (11+)
Avoid sun during midday, use SPF 50+
Very High (8-10)
Essential sun protection required
High (6-7)
Use SPF 30+, wear hat & sunglasses
Moderate (3-5)
Sun protection recommended
Low-Moderate (1-2)
Minimal protection needed
Low (0)
No protection required

Daylight Hours

Daylight varies from 9.6 hours in June (winter) to 14.7 hours in December (summer), which is a difference of 5.1 hours.

Shortest Days

June
9.6h
Average Sunrise:08:31
Average Sunset:18:06
Plan daytime activities for midday when light is best. Early sunsets mean evening plans should account for darkness.

Longest Days

December
14.7h
Average Sunrise:05:52
Average Sunset:20:35
Extended daylight perfect for evening activities and late dining. You can fit more sightseeing into each day.

Wind & Humidity Overview

Wind Conditions

Average wind speed
Windiest months:
October (15 km/h) November (15 km/h) September (14 km/h)
Packing tip: Conditions are generally calm, but a light layer is always handy.

Humidity Levels

Average humidity
80%
Most humid:
June (85%)
Least humid:
February (75%)
Packing tip: Choose breathable, natural fabrics like cotton or linen for comfort in humid conditions.

Seasonal Overview

Southern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:

Summer

January, February, December
Avg High 22°C
Avg Low 14°C
Avg Rain 87 mm
Comfortable temperatures; enjoy outdoor activities

Autumn

March, April, May
Avg High 19°C
Avg Low 11°C
Avg Rain 91 mm
Wet season begins; bring rain gear

Winter

June, July, August
Avg High 14°C
Avg Low 6°C
Avg Rain 120 mm
Cool weather; bring layers and a jacket

Spring

September, October, November
Avg High 17°C
Avg Low 9°C
Avg Rain 106 mm
Warming trend with frequent showers; pack waterproofs

Monthly Details

Click any month for detailed weather information and packing advice.

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Frequently Asked Questions

What is the best month to visit Hamilton?

The best months to visit Hamilton depend on your preferences. For warm weather, February is typically the warmest month. For dry conditions, March, February, January tend to have the least rainfall. Consider your priorities—whether you prefer warmer temperatures, drier weather, or longer daylight hours.

When is Hamilton warmest?

February is typically the warmest month in Hamilton, with average high temperatures reaching around 23°C (73°F). This is peak summer weather, ideal for outdoor activities and sightseeing.

When is Hamilton coldest?

July is usually the coldest month, with average low temperatures dropping to around 5°C (41°F). Pack warm layers if visiting during this time, especially for evening activities.

When does Hamilton get the most rain?

July typically sees the most rainfall in Hamilton, averaging around 128mm (5.0 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.

What is the driest month in Hamilton?

March is typically the driest month, with average rainfall of just 75mm (3.0 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.

How much does the temperature vary in Hamilton throughout the year?

Temperatures in Hamilton range from average lows of 10°C (50°F) to highs of 18°C (64°F). This variation means you'll want to pack differently depending on when you visit—layers are key for adapting to the seasonal changes.

Do I need sun protection when visiting Hamilton?

Yes, sun protection is important in Hamilton. UV levels can reach 9 during peak months, which is considered very high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.

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