Each year, summer brings with it a flurry of expectations—sunny skies, warm temperatures, long evenings, and outdoor adventures. For residents of Edmonton, these months are especially treasured due to the city’s long, cold winters. However, during the summer of 2025, a familiar murmur began to circulate: “Hasn’t it felt colder than usual?” From morning conversations at coffee shops to discussions around backyard fire pits, many Edmontonians have expressed that this summer seems cooler, cloudier, and perhaps even a bit disappointing compared to previous years. But is that perception accurate?
A closer look at meteorological data, long-term weather patterns, and historical averages tells a more nuanced story. While 2025 has indeed had some cooler and wetter moments, it may not be as unusual as many believe. Let’s dive deep into the numbers, patterns, and perceptions behind Edmonton’s summer of 2025 to understand whether it’s really been “that cool” after all.
What Defines a ‘Cool Summer’?
To begin with, it's important to define what constitutes a “cool” summer. For some, the answer is simple: a lack of days above 25°C. For others, it’s the number of rainy days or the frequency of cloudy skies that determine how “good” or “bad” a summer feels. From a meteorological perspective, a cooler summer is one in which average daytime high temperatures are consistently lower than historical seasonal norms. In Edmonton, those norms are well-documented thanks to decades of data collection by Environment Canada.
Edmonton's Historical Climate Norms
Edmonton’s climate is classified as a humid continental climate, which means summers are typically warm and sunny, though not excessively hot. On average:
July, the hottest month of the year, sees a mean temperature of around 18.6°C.
The average highs in July hover around 23.5°C, with overnight lows averaging near 13°C.
August tends to be slightly cooler but still warm, with daytime highs regularly in the low 20s.
On average, Edmonton sees 4–6 days in July and August that exceed 30°C.
The city averages 250–300 hours of sunshine per month in peak summer, with July typically being the sunniest month.
These historical baselines are important because they set expectations. Any significant deviation—upward or downward—can influence how residents perceive the season.
What the 2025 Data Says
Let’s examine what summer 2025 has actually looked like so far.
June 2025 began cooler than expected, with daily highs in the low 20s and several days where temperatures didn’t reach 20°C. A few rainy systems passed through in the first two weeks, contributing to a damp start. However, the final 10 days of the month warmed up considerably, with temperatures pushing above 26°C on multiple occasions.
July 2025 has been characterized by temperature variability. While the first week was warmer than average—reaching 28–29°C in some areas—a noticeable cool-down followed. Several stretches in mid-July featured high temperatures in the range of 19–22°C, along with increased cloud cover and sporadic rainfall. Despite this, there were a few isolated days where highs again approached the 30°C mark.
Total average temperature for July is currently tracking just slightly below the 30-year average, with an overall mean of about 18.0°C, compared to the norm of 18.6°C.
The takeaway here is that, while it has felt “cooler,” the actual deviation from average has been minimal—roughly half a degree Celsius below normal. In meteorological terms, this is not significant. However, perception doesn’t always align with data.
Perception vs. Reality: Why It Feels Cooler
Why does the summer of 2025 feel different if the numbers aren’t all that unusual? Several factors can influence public perception of weather, especially in summer:
Weather Memory Bias: People tend to remember extremes more vividly. If 2024 had more hot days (which it did), 2025 might feel colder by comparison—even if it’s close to the norm.
Event-Based Weather Experience: If specific holidays like Canada Day or weekends were cloudy or wet, people may recall the season as less enjoyable.
Rainfall Timing: Even if total rainfall isn’t higher, if it occurs during peak activity times—like evenings or weekends—it can impact how the summer is experienced.
Wind and Humidity: Some days in July 2025 were slightly breezier than average, and lower humidity levels can make moderate temperatures feel cooler.
Sunshine Levels and Cloud Cover
Another critical factor in summer perception is sunshine. Even if the temperature is average, a lack of sun can make a day feel dreary.
July 2025 has recorded below-average sunshine hours, with frequent cloud cover due to upper-level systems moving across Alberta from the Pacific.
The city has experienced 5–6 fully overcast days, which is slightly above average for July.
While temperature is the primary factor in seasonal weather data, sunshine is the primary factor in how people feel during summer. A summer with average temperatures but below-average sunshine can feel significantly worse to residents.
Rainfall Trends and Moisture
Rainfall is another aspect that can shape summer impressions. In 2025:
Total precipitation for July is about 10% higher than average, with several days seeing light showers.
Importantly, this year has seen more frequent but less intense rainfall events, often spread throughout the day.
These drizzle-like days contribute to the feeling of a less “summer-like” atmosphere, even though they may not drastically increase total rainfall.
Comparing to 2024 and Previous Summers
To fully understand this summer’s uniqueness (or lack thereof), it’s helpful to compare it to previous years:
2024 was significantly warmer, with several prolonged heat waves and more than 10 days over 30°C.
2023 was wetter and cooler overall, but July 2023 had more sunny days than July 2025.
In contrast, 2025 has had less extreme heat, but also less severe storms, fewer air quality alerts, and more moderate conditions.
This puts 2025 squarely in the middle—not the coolest, not the wettest, and certainly not the hottest. But because of the sharp contrast to 2024, this summer might feel underwhelming in comparison.
Impact on Local Life and Events
Weather has direct and indirect effects on Edmonton’s lifestyle. From outdoor festivals to construction projects, a cooler or rainier summer can have consequences:
Edmonton Folk Fest, Taste of Edmonton, and K-Days all experienced cooler weather this year, which slightly reduced turnout but also made events more comfortable for some attendees.
Local farmers markets and urban agriculture projects have reported slower early growth in crops like tomatoes and peppers, which thrive on heat.
Recreational activities such as river kayaking, patio dining, and camping have seen varied attendance, depending on weekly forecasts.
While no major events were canceled due to weather, several had to adapt to unexpected changes in temperature and rainfall.
Climate Change Considerations
Some Edmontonians have wondered if climate change is playing a role in the perceived weather shifts. Ironically, while global climate change trends predict overall warming, they also bring increased variability and unpredictable seasonal patterns. This means that in some years, cities like Edmonton might experience cooler summers as part of a broader trend toward instability.
Long-term climate models for Alberta predict:
More heat extremes and droughts,
But also increased rainfall intensity and unpredictability,
And a longer frost-free season overall.
The 2025 summer fits within this model: more variability, moderate heat, and an earlier-than-average start to spring. So, while this specific summer isn’t drastically off-trend, it may be part of a shifting pattern in how summer is defined and experienced in the years to come.
What Can Residents Expect in August?
Looking forward, weather forecasters suggest that August 2025 may bring slightly warmer conditions, especially in the second half of the month. Long-range models are predicting:
A high-pressure ridge developing over western Canada, bringing drier, sunnier conditions,
More days in the 27–30°C range,
And less rainfall compared to July.
If these forecasts hold true, residents may enjoy a more “classic” end to the summer, complete with patio evenings, lakeside getaways, and heatwaves that make people forget the earlier cool streaks.
Despite common sentiment, Edmonton’s summer of 2025 has not been exceptionally cold. While some weeks have indeed been cooler than average, the season as a whole is well within the historical range. However, public perception is shaped by more than just the numbers. Factors like sunshine hours, weekend rainfall, and comparisons to previous summers all play a role in how the season is remembered.
Ultimately, this year’s summer is a reminder of the complexity of weather—and how our expectations, memories, and daily experiences influence how we interpret it. For now, Edmontonians may still have several warm weeks ahead to soak up the sun and make the most of what’s left of summer.
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