Milton (ON) Temperature by Month

The average annual maximum temperature in Milton, Ontario, Canada is 14°C (57°F), with daytime highs ranging from 0°C (32°F) in January to 27°C (81°F) in July. This page covers monthly averages, day-night differences, and how Milton compares to cities worldwide.

Depending on the time of the year, temperatures range from comfortable to very cold in Milton. At night, minimum temperatures range from 17°C (63°F) in July to -9°C (16°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Milton by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. July, the city's warmest month, averages 295 hours of sunshine.

The chart below shows the average temperature throughout the year:

Milton's average annual maximum temperature is 14°C (57°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In Milton, January is the coolest month, with average highs of 0°C (32°F) and humidity around 72%, considered high. In July, the warmest month, temperatures average 27°C (81°F) with 53% humidity, conditions that feel moderate. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Milton's weather, including monthly rainfall, sunshine hours, and humidity, visit our Milton climate page.