Last updated: April 22, 2025
July in Ottawa, Canada presents a vibrant tapestry of summer weather, characterized by a sizzling maximum temperature reaching 35°C (96°F), while the average rests comfortably at 21°C (70°F). However, cool evenings can dip as low as 8°C (47°F), providing a refreshing contrast. The month experiences 114 mm (4.5 in) of rainfall over approximately 12 days, contributing to a humidity level of 69% that enhances the lushness of the city. Residents and visitors alike can enjoy a dynamic summer experience, balancing warm sun with refreshing breezes and occasional showers.
In July, Ottawa embraces the warmth of summer with minimum temperatures averaging around 8°C (47°F) and peaking at a balmy 35°C (96°F). This month showcases a delightful rise in temperatures, with an average of 21°C (70°F), enticing residents and visitors alike to enjoy outdoor activities under the sun. Compared to the preceding months, July stands out as the warmest of the year, transforming the city into a vibrant hub of summer festivals, picnic spots, and leisurely evenings by the river. With such dramatic shifts from the frigid depths of winter, July’s cozy temperatures invite everyone to bask in the beauty of the season, making it a cherished month in Ottawa's climate calendar.
July in Ottawa typically showcases a significant increase in precipitation, recording an average of 114 mm (4.5 in) over 12 days. This marked uptick comes in the midst of summer, making it one of the wetter months in the year. Compared to previous months, July's rainfall is slightly higher than June’s 98 mm (3.9 in), reinforcing the trend of increased moisture as the summer progresses. As the city experiences warmer temperatures, the consistent rainfall contributes to vibrant landscapes, but also reminds residents to keep their umbrellas handy as they enjoy the beauty of the season.
July in Ottawa experiences a marked shift in humidity, with levels settling at 69%. This represents a slight increase from June's 68%, showcasing how the warm summer months bring a touch more moisture to the air. However, July's humidity remains relatively low compared to the winter months, where it peaks at an impressive 93% in January and February. As summer progresses into August, humidity dips again to 67%, emphasizing a trend of decreasing humidity as the season wanes. Overall, July serves as a transitional month, balancing a warm climate with comfortable humidity levels, inviting residents and visitors to enjoy the outdoors.
In July, Ottawa experiences a UV Index of 8, categorized as very high, meaning that sun exposure can quickly lead to skin damage within just 15 minutes. This trend of elevated UV levels continues from June, where the index also reached 9, showcasing a peak in sun intensity during the summer months. Interestingly, as we move from June to July, there’s a slight decrease in the index, yet the burn time remains critically short. As residents and visitors bask in the warmth of summer, it’s essential to stay vigilant about sun protection, especially since the index shifts again to 8 in August. For more detailed information on UV levels year-round, visit Ottawa UV Index.
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July shines as the pinnacle of sunshine in Ottawa, basking in an impressive 348 hours of radiant daylight. This month stands out as a remarkable contrast to the earlier winter months, where sunlight barely reaches 111 hours in January. As the year progresses, each month welcomes an increase in sunshine, peaking in July before gradually tapering off to 315 hours in August. The vibrant summer months invigorate the city, highlighted by the relentless warmth and long days, while fall approaches with a gentle decline in sunlight, dropping to 267 hours in September. This trend underscores Ottawa's transformation from the starkness of winter to the exuberance of a sun-drenched summer, inviting residents to revel in the joys of July's abundant sunshine.
In Ottawa, Canada, the likelihood of enjoying sunny weather in July hovers around 35%, reflecting a notable trend in summer sunshine compared to other months. While this percentage mirrors the somewhat cloudy June, it contrasts with the brighter month of August, which boasts a 43% chance of sun. Interestingly, July's sunny probabilities fall below spring's peaks in March and May, highlighting a curious fluctuation as summer progresses. Overall, while July may not offer the sunniest days, its warmth and lively atmosphere still promise enjoyable outdoor experiences amidst the occasional cloud cover.
In July, Ottawa basks in a generous 15 hours of daylight, a peak that continues the trend of increasing sunlight from the depths of winter. Starting with just 9 hours in January, the city experiences a gradual ascent, with each month heralding an added hour of brightness, igniting the warmth of spring and summer. This lush light not only extends joy-filled days but also invites outdoor activities and gatherings. As the summer sun begins to wane in August, daylight gently recedes to 14 hours, signaling the transition towards shorter days, yet the essence of summer lingers. This seasonal rhythm highlights the fleeting nature of daylight, capturing the essence of Ottawa's dynamic yearly cycle.
In July, Ottawa experiences a gentle breeze with an average wind speed of 2.6 m/s (6 mph), marking a notable dip compared to the previous months. This trend of decreasing wind speeds begins in late spring and continues into summer, where July is among the calmest months of the year. As temperatures rise, the lighter winds contribute to a more relaxed ambiance in the city, allowing residents and visitors to enjoy the warm weather without the disturbance of strong gusts. Interestingly, August follows suit with an even lower average of 2.4 m/s (5 mph), suggesting a pattern of tranquility that characterizes the summer months in Ottawa. As the summer winds down, the air begins to pick up again, hinting at a return to breezier conditions come autumn.
The weather in Ottawa changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of July's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Ottawa and find detailed weather information for every month.
In July, Ottawa experiences warm temperatures ranging from a cool 8°C (47°F) at night to a scorching 35°C (96°F) during the day, with an average of about 21°C (70°F). The month is characterized by higher humidity levels of 69% and a total precipitation of 114 mm (4.5 in) over approximately 12 days. In contrast, January brings frigid conditions, with temperatures plummeting as low as -32°C (-26°F) and averaging around -9°C (16°F), peaking at just 10°C (50°F). The winter month sees lower precipitation at 76 mm (3.0 in) over 9 days, but significantly higher humidity at 93%. For more details, check out Ottawa weather in January.
July and February present stark contrasts in weather conditions. In July, temperatures range from a chilly 8°C (47°F) at night to a sweltering 35°C (96°F) during the day, with an average of 21°C (70°F). It is a month that experiences significant precipitation, with around 114 mm (4.5 in) falling over 12 days and humidity levels averaging 69%. In contrast, February is characterized by frigid temperatures, dipping as low as -27°C (-16°F) and averaging -8°C (18°F). While there is less precipitation at 81 mm (3.2 in), it too falls over 12 days, but the humidity is higher at 93%, contributing to the biting cold. For more detailed information, you can check Ottawa weather in February.
When comparing the weather in July and March, the differences are quite striking. July experiences significantly warmer temperatures, with averages around 21°C (70°F) and highs that can reach up to 35°C (96°F). In contrast, March features much colder conditions, with average temperatures at a chilly -3°C (27°F) and lows plummeting to -24°C (-12°F).
While both months see precipitation over 12 days, July tends to be wetter with 114 mm (4.5 in) compared to March's 87 mm (3.4 in). Furthermore, March has higher humidity levels at 86%, as opposed to July's 69%. For a deeper look into the specifics of March weather, you can visit Ottawa weather in March.
When comparing the weather in July and April, notable differences emerge. July boasts much warmer temperatures, ranging from a minimum of 8°C (47°F) to a maximum of 35°C (96°F), with an average of 21°C (70°F). In contrast, April's temperatures are significantly cooler, with a range from -12°C (10°F) to a maximum of 27°C (81°F) and an average of only 5°C (42°F). Precipitation levels in both months are similar, with July receiving 114 mm (4.5 in) and April slightly less at 112 mm (4.4 in), both occurring across 12 days. Additionally, humidity in July averages 69%, whereas in April it is higher at 82%. For more insights on April's weather, you can visit Ottawa weather in April.
In comparing the weather between July and May, July typically experiences a warmer climate with average temperatures reaching 21°C (70°F), while May's averages are cooler at 13°C (56°F). Both months can see high temperatures, with July peaking at 35°C (96°F) and May matching at 35°C (95°F); however, nighttime temperatures in May can dip much lower, with a minimum of -3°C (26°F). Precipitation levels are similar, with July receiving about 114 mm (4.5 in) over 12 days and May slightly higher at 117 mm (4.6 in) over 14 days, but May's humidity is slightly higher at 75% compared to July's 69%. For a closer look at May's weather, visit Ottawa weather in May.
July generally experiences warmer temperatures compared to June, with average highs reaching 35°C (96°F) in July, compared to a maximum of 32°C (91°F) in June. The minimum temperatures also rise notably, with July starting at 8°C (47°F) versus June's 2°C (36°F). Precipitation is somewhat higher in July, totaling 114 mm (4.5 in) over 12 days, compared to 98 mm (3.9 in) over 13 days in June. Humidity remains relatively similar, with July at 69% and June slightly lower at 68%. For more details on June’s weather, check out Ottawa weather in June.
In comparing the weather between July and August, July typically experiences slightly warmer temperatures, with average highs reaching up to 35°C (96°F) compared to August’s maximum of 32°C (89°F). Both months have a similar range of minimum temperatures, with July's lows at 8°C (47°F) and August's at 7°C (45°F). Additionally, July sees more precipitation, totaling 114 mm (4.5 in) over 12 days, while August has a lower total of 94 mm (3.7 in) with precipitation on 13 days. Humidity levels are also quite comparable, with July at 69% and August slightly lower at 67%. For more specific details about August weather, you can refer to Ottawa weather in August.
July and September exhibit notable differences in weather patterns. In July, temperatures can soar with a minimum of 8°C (47°F) and a maximum of 35°C (96°F), averaging around 21°C (70°F). The month experiences relatively high humidity at 69% and significant precipitation of 114 mm (4.5 in) over approximately 12 days. In contrast, September brings cooler temperatures, with a minimum of 0°C (31°F), an average of 15°C (60°F), and a maximum of 32°C (90°F). Although it enjoys a slightly lower total precipitation of 79 mm (3.1 in) over about 11 days, humidity increases to 72%. For more detailed information, visit Ottawa weather in September.
July and October present stark contrasts in weather. In July, temperatures range from a mild 8°C (47°F) to a scorching high of 35°C (96°F), with an average of 21°C (70°F). Despite experiencing decent warmth, July is also marked by significant rainfall, accumulating 114 mm (4.5 in) over 12 days, accompanied by a humidity level of 69%. In contrast, October brings a much cooler climate, with temperatures dipping as low as -6°C (22°F) and averaging only 9°C (48°F). While the maximum temperature of 27°C (81°F) may offer respite from the chill, the month sees a slight increase in precipitation to 132 mm (5.2 in) over the same number of rainy days, along with a higher humidity of 83%. This shift in weather highlights the transition from the warmth of summer to the crispness of autumn. For a more detailed look at the October weather, you can visit Ottawa weather in October.
July and November present stark contrasts in weather conditions. July boasts warm temperatures with a minimum of 8°C (47°F), an average of 21°C (70°F), and highs reaching up to 35°C (96°F). The month also experiences significant precipitation, totaling 114 mm (4.5 in) over about 12 days, accompanied by a humidity level of 69%. In sharp contrast, November sees much colder temperatures, ranging from a chilling minimum of -19°C (-2°F) to a maximum of 22°C (71°F), with an average temperature of just 0°C (33°F). Although precipitation is slightly lower at 97 mm (3.8 in) spread over 14 days, humidity is notably higher at 88%. For more detailed information, check out Ottawa weather in November.
July and December present strikingly contrasting weather patterns. In July, temperatures range from a minimum of 8°C (47°F) to a maximum of 35°C (96°F), with an average of 21°C (70°F). The month experiences significant rainfall, totaling 114 mm (4.5 in) over 12 days, accompanied by a humidity level of 69%, making it a warm and often humid summer month. In stark contrast, December's weather is much harsher, with temperatures plummeting to a minimum of -29°C (-20°F) and an average of -5°C (22°F), peaking at a modest 14°C (58°F). Precipitation is lower at 80 mm (3.2 in) over the same number of days, yet the humidity rises to 89%, adding to the chilly atmosphere. For more insights into December weather, visit Ottawa weather in December.
In July, Ottawa experiences its warmest month of the year, with temperatures soaring higher than during any other time, often reaching into the mid-30s°C. This heat is complemented by an average temperature that provides a pleasant daytime feel, though refreshing nights can still bring cool breezes. However, July also sees a fair amount of precipitation, with several rainy days contributing to the city's lush summer landscape. The humidity tends to be on the higher side, making the warmth feel even more intense. This unique combination of warmth and moisture distinctly sets July apart from Ottawa’s other months, inviting both locals and tourists to enjoy vibrant outdoor activities. For a deeper understanding of Ottawa's weather patterns year-round, explore Ottawa Climate.