Brighton (CO) Temperature by Month

Brighton in Colorado, United States of America sees significant seasonal temperature differences, with daytime highs between 5°C (41°F) in December and 33°C (91°F) in July, averaging 19°C (66°F) annually. Explore the full monthly breakdown below.

Depending on the time of the year, temperatures range from very warm to cold in Brighton. Nighttime lows follow the same pattern, ranging from 15°C (59°F) to -10°C (14°F).

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

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. July, the warmest month of the year, receives 323 hours of sunshine.

The chart below shows the average temperature throughout the year:

Brighton's average annual maximum temperature is 19°C (66°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.

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 Brighton, December is the coolest month, with average highs of 5°C (41°F) and humidity around 56%, considered moderate. In July, the warmest month, temperatures average 33°C (91°F) with 46% 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.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Brighton this rarely lasts long on the ground.

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