Treasure Island (Ontario)

Island Private island on Lake Huron, Ontario

A small Ontario island in the Great Lakes region frequented by boaters and anglers; seasonal cottages, rocky shoreline and direct access to boating routes shape most visits.

Main image
Treasure Island (Ontario)
45.7668, -82.1831

Best Time to Visit Treasure Island (Ontario) #

Visit in summer (June-September) for reliable access, warm weather and boating around the island.

Summer (boating season, best)
June-September · 15-25 °C
Warm weather and calm waters ideal for boating, swimming and camping - busiest and most accessible period.
Shoulder (cooler, quieter)
May, October · 5-15 °C
Fewer visitors and cooler temperatures; some facilities or services may be limited outside high season.
Winter (inaccessible)
November-April · −20-0 °C (varies)
Lake and waterways freeze in many years and access by boat is not possible; recreational use is minimal.

Weather & Climate near Treasure Island (Ontario) #

Climate

Treasure Island (Ontario)'s climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -14°C to 23°C. Moderate rainfall (868 mm/year).

Temperature & Rainfall
Temperature Range
23°
Warmest Month
-14°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of -5°C and lows of -14°C. Moderate rainfall (70 mm).

Comfort

-9°
Feels Like Freezing
-9°C
Temperature
-14° -5°

Weather

70 mm
Rainfall
4.8 m/s
Wind
Light Breeze

February

February is freezing with highs of -4°C and lows of -13°C. Moderate rainfall (46 mm).

Comfort

-9°
Feels Like Freezing
-9°C
Temperature
-13° -4°

Weather

46 mm
Rainfall
4.5 m/s
Wind
Light Breeze

March

March is freezing with highs of 1°C and lows of -8°C. Moderate rainfall (56 mm).

Comfort

-4°
Feels Like Freezing
-4°C
Temperature
-8°

Weather

56 mm
Rainfall
4.4 m/s
Wind
Light Breeze

April

April is cold with highs of 8°C and lows of -1°C. Moderate rainfall (66 mm).

Comfort

Feels Like Cold
C
Temperature
-1°

Weather

66 mm
Rainfall
4.4 m/s
Wind
Light Breeze

May

May is cool with highs of 15°C and lows of 5°C. Moderate rainfall (72 mm).

Comfort

10°
Feels Like Cool
10°C
Temperature
15°

Weather

72 mm
Rainfall
3.9 m/s
Wind
Light Breeze

June

June is cool with highs of 20°C and lows of 10°C. Moderate rainfall (64 mm).

Comfort

15°
Feels Like Cool
15°C
Temperature
10° 20°

Weather

64 mm
Rainfall
3.6 m/s
Wind
Light Breeze

July

July is the warmest month with highs of 23°C and lows of 14°C. Moderate rainfall (58 mm).

Comfort

19°
Feels Like Mild
19°C
Temperature
14° 23°

Weather

58 mm
Rainfall
3.4 m/s
Wind
Light Breeze

August

August is mild with highs of 22°C and lows of 14°C. Moderate rainfall (73 mm).

Comfort

18°
Feels Like Mild
18°C
Temperature
14° 23°

Weather

73 mm
Rainfall
3.5 m/s
Wind
Light Breeze

September

September is cool with highs of 18°C and lows of 11°C. Regular rainfall (92 mm).

Comfort

15°
Feels Like Cool
15°C
Temperature
11° 18°

Weather

92 mm
Rainfall
4.0 m/s
Wind
Light Breeze

October

October is cold with highs of 12°C and lows of 5°C. The wettest month with 97 mm of rain.

Comfort

Feels Like Cold
C
Temperature
12°

Weather

97 mm
Rainfall
4.6 m/s
Wind
Light Breeze

November

November is cold with highs of 5°C and lows of -1°C. Regular rainfall (91 mm).

Comfort

Feels Like Cold
C
Temperature
-1°

Weather

91 mm
Rainfall
5.1 m/s
Wind
Light Breeze

December

December is freezing with highs of -1°C and lows of -8°C. Regular rainfall (83 mm).

Comfort

-5°
Feels Like Freezing
-5°C
Temperature
-8° -1°

Weather

83 mm
Rainfall
4.9 m/s
Wind
Light Breeze

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