Last updated: August 27, 2025
August in Irkutsk, Russian Federation, offers a dynamic weather experience marked by a maximum temperature soaring to 30°C (86°F) and an average of 17°C (63°F), providing pleasantly warm days. However, mornings can be cool, with minimum temperatures dipping to 4°C (39°F). Rainfall is a notable aspect of the month, with precipitation totaling 88 mm (3.5 in) spread across approximately 12 days, contributing to a humidity level of 73%. Visitors can expect a mix of warm sunshine and refreshing showers, making August a unique time to explore the vibrant city of Irkutsk.
In August, Irkutsk experiences a notable shift in temperature as summer reaches its peak. With minimums hovering around 4°C (39°F) and an average of 17°C (63°F), the days are comfortably warm, providing a pleasant contrast to the frosty extremes of winter. This month brings maximums that can soar to 30°C (86°F), allowing residents and visitors alike to bask in the sunshine while enjoying outdoor activities. As August progresses, the temperatures begin a gradual descent, foreshadowing the cooler months to come, yet for now, Irkutsk revels in a brief but delightful summer warmth that stands in stark contrast to the -41°C (-41°F) chill of January.
In August, Irkutsk experiences a slight dip in precipitation compared to the previous month, with 88 mm (3.5 in) of rain over 12 days. This marks a continuation of the city's wet summer, following July’s substantial 96 mm (3.8 in). The prolonged rainy season contributes to lush landscapes and vibrant greenery, enhancing the region's natural beauty. As the summer months wind down, the rainfall begins to taper, setting the stage for the drier autumn ahead. Irkutsk's precipitation pattern showcases a dynamic shift: while early winter sees minimal moisture, the late spring and summer months often bring refreshing rains, critical for supporting the local ecosystem.
August in Irkutsk brings a slight increase in humidity, averaging 73%, following the summer months of June and July, which recorded the lowest levels at 64% and 71%, respectively. This subtle uptick reflects a seasonal transition as the city prepares for the arrival of autumn's moisture-laden air. Throughout the year, Irkutsk experiences a prominent shift in humidity; it peaks in the cold winter months with January and December reaching a staggering 94% and 96%. Interestingly, this pattern shows a gradual decrease from the frigid winter towards the warmer months, only to rise again as the year winds down. Overall, August serves as a reminder of summer's lingering warmth as it folds into the wetter, chillier fall months ahead.
In August, Irkutsk experiences a high UV Index of 7, which highlights the importance of sun safety as exposure increases. With a burn time of only 25 minutes, residents and visitors should be mindful of their time outdoors during peak sunlight hours. This month's UV conditions follow a trend established in the summer, where June and July also presented very high UV levels at 8, requiring extra precautions. As the seasons shift towards autumn, the UV Index typically declines, as seen in September's moderate rating of 5. For those planning outdoor activities, understanding these UV trends is crucial for protecting skin health in the changing climate. For more detailed information, check out Irkutsk UV Index.
UV Risk Categories
Amidst the fascinating climate of Irkutsk, August shines brightly, contributing to the summer's warm embrace with 342 hours of sunshine. This peak month for sunlight follows a steady increase from the depths of winter, where January barely sees 166 hours. As the year progresses, the sunshine hours climb consistently, culminating in the longest days of June and July. Despite a slight decline in August, the city retains ample light, setting a vibrant stage for outdoor adventures before the days begin to shorten again in September. This pattern not only showcases Irkutsk's rich seasonal contrasts but also highlights how summer days can linger delightfully long before they yield to the crispness of autumn.
In Irkutsk, the month of August brings a modest 34% chance of sunny weather, contributing to a warm and inviting atmosphere as summer begins to wind down. While this figure is slightly lower than the sunny probabilities seen in March and October, which register at 48% and 53% respectively, it still reflects a trend of fluctuating sunshine throughout the year. Following the peak summer months of June and July—both at 39%—August's chances of clear skies are certainly more favorable than the gloomy winter months. As the city transitions toward autumn, residents and visitors alike can still anticipate some bright days amidst the lush landscapes surrounding Lake Baikal.
In Irkutsk, the ebb and flow of daylight throughout the year paints a captivating portrait of the seasons. As summer reaches its zenith in June and July, residents bask in a generous 16 hours of sunlight each day, fostering a vibrant outdoor lifestyle. However, as August arrives, a gentle decline begins, with daylight offering a still-resplendent 14 hours that hints at the transitions ahead. This gradual tapering continues into September, with daylight retreating to 12 hours, signaling the approach of autumn. Such patterns reveal not just the dance of light and shadow, but also the rhythmic changes that shape life in this Russian locale, encouraging a deep appreciation for its fleeting summer warmth.
In Irkutsk, August brings a gentle breeze with an average wind speed of 2.7 m/s (6 mph), indicative of a slight revival from the summer's quieter months. This wind speed mirrors March's winds, suggesting a tendency towards mild conditions during late summer. Notably, the preceding months, June and July, record slightly lower figures, with July experiencing the year’s calmest winds at 2.3 m/s (5 mph). However, as autumn approaches in September, the winds pick up a hint of vigor, averaging 2.8 m/s (6 mph), hinting at the region's transition into the brisker fall months. Overall, the August winds contribute to Irkutsk’s vibrant summer scenery while foreshadowing the refreshing changes of autumn ahead.
Weather in Irkutsk varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Irkutsk, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, Irkutsk experiences a much milder climate with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 30°C (86°F) and an average of 17°C (63°F). This month sees average precipitation of 88 mm (3.5 in) over about 12 days, alongside relatively comfortable humidity levels at 73%. In contrast, January brings frigid conditions, where temperatures plummet to a minimum of -41°C (-41°F) and rarely rise above -5°C (24°F), averaging -19°C (-1°F). Precipitation is significantly lower at just 12 mm (0.5 in) over 4 days, but humidity remains high at 94%. For more information, visit Irkutsk weather in January.
The weather in August and February presents a stark contrast. In August, temperatures range from a mild 17°C (63°F) on average, reaching highs of 30°C (86°F), making it a warm and humid month with 73% humidity and 88 mm (3.5 in) of precipitation over approximately 12 days. In sharp contrast, February experiences frigid conditions, with average temperatures plunging to -16°C (3°F) and lows reaching a chilling -40°C (-39°F). This month sees minimal precipitation of just 11 mm (0.4 in) across about 4 days, while humidity remains high at 90%. For a closer look at the conditions in February, you can visit Irkutsk weather in February.
Comparing the weather in August and March reveals a striking contrast. August experiences a milder climate, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 30°C (86°F) and an average of 17°C (63°F). The month sees approximately 88 mm (3.5 in) of precipitation spread over 12 days, with a humidity level of 73%. In sharp contrast, March is characterized by frigid conditions, featuring temperatures that can plummet as low as -30°C (-22°F) and only reach a maximum of 12°C (54°F), with an average temperature of -5°C (23°F). Additionally, March receives considerably less precipitation, only 16 mm (0.6 in), over 4 days, and has a higher humidity of 81%. For more detailed information, you can refer to Irkutsk weather in March.
In comparing the weather between August and April, notable differences emerge. August features a warmer climate, with average temperatures ranging from a cool 17°C (63°F) to a high of 30°C (86°F) and significantly higher precipitation of 88 mm (3.5 in) over 12 days. On the other hand, April experiences much cooler conditions, highlighted by an average temperature of 4°C (39°F), with a minimum plunging to -11°C (13°F) and a maximum reaching 28°C (82°F). Additionally, precipitation in April is considerably lower at just 19 mm (0.8 in) across 6 days. Both months share a consistent humidity level of 73%, but the overall feel of the weather starkly contrasts, offering a vibrant summer warmth in August versus the brisk, transitional chill of April. For more details about Irkutsk in April, you can visit Irkutsk weather in April.
When comparing the weather in August and May, we see notable differences in temperature and precipitation levels. August experiences a warmer average temperature of 17°C (63°F), with a maximum reaching up to 30°C (86°F), while May has a cooler average of 10°C (50°F), with temperatures peaking at 31°C (89°F). Interestingly, May can sometimes bring higher maximum temperatures, despite its overall cooler average. Precipitation in August is more abundant, totaling 88 mm (3.5 in) across 12 days, compared to May's 48 mm (1.9 in) over 11 days. Humidity levels also vary slightly, with August being a bit more humid at 73%, against May's 67%. For more detailed insights into May weather, you can visit Irkutsk weather in May.
In June, the weather tends to be slightly cooler, with average temperatures of 16°C (61°F) compared to August's warmer average of 17°C (63°F). June experiences a wider temperature range, reaching a maximum of 33°C (92°F), whereas August peaks at 30°C (86°F). Precipitation is also lower in June, with only 47 mm (1.8 in) over approximately 10 days, compared to August’s 88 mm (3.5 in) over 12 days. Additionally, humidity levels are generally lower in June at 64%, versus 73% in August. For a more detailed look at June weather, you can visit Irkutsk weather in June.
In comparing the weather of August and July, notable differences and similarities emerge. In August, temperatures range from a minimum of 4°C (39°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F). July, on the other hand, experiences slightly warmer conditions with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 32°C (90°F), and an average of 19°C (66°F). Both months have precipitation over 12 days, but July sees slightly more rainfall, with 96 mm (3.8 in) compared to August's 88 mm (3.5 in). Additionally, the humidity is marginally lower in July at 71%, compared to August's 73%. For more detailed information about July's weather, you can visit Irkutsk weather in July.
August and September present a noticeable shift in weather patterns. In August, temperatures range from a mild minimum of 4°C (39°F) to a warm maximum of 30°C (86°F), with an average of 17°C (63°F). This month also sees about 88 mm (3.5 in) of precipitation over 12 days, accompanied by a humidity level of 73%. In contrast, September experiences cooler conditions, with temperatures dropping to a minimum of -1°C (31°F) and an average of 11°C (52°F), peaking at 26°C (79°F). The precipitation decreases slightly to 75 mm (2.9 in) over 10 days, while humidity rises to 84%. For more detailed insights into the weather during September, visit Irkutsk weather in September.
August and October present a striking contrast in weather. In August, temperatures range from a mild 4°C (39°F) at night to a warm 30°C (86°F) during the day, with an average of 17°C (63°F). It experiences significant precipitation, totaling 88 mm (3.5 in) over about 12 days, accompanied by a moderate humidity level of 73%. In contrast, October sees a drop in temperatures, with nighttime lows plummeting to -8°C (18°F) and daytime highs reaching only 22°C (71°F), resulting in an average of just 3°C (37°F). Rainfall is much lighter, at 25 mm (1.0 in) over approximately 6 days, and humidity rises to 84%. For more details, you can visit Irkutsk weather in October.
August and November present drastically different weather conditions. In August, temperatures range from a minimum of 4°C (39°F) to a pleasant average of 17°C (63°F), peaking at a maximum of 30°C (86°F). The month also experiences significant rainfall, with 88 mm (3.5 in) of precipitation over 12 days and humidity levels at 73%. In stark contrast, November sees frigid temperatures, with a minimum of -28°C (-18°F) and an average temperature plunging to -7°C (20°F), while the maximum reaches only 10°C (50°F). This cooler month is characterized by much lighter precipitation of just 13 mm (0.5 in) over 4 days, although humidity rises to 90%. For more detailed information, check out Irkutsk weather in November.
The weather in August and December presents a striking contrast. In August, temperatures range from a minimum of 4°C (39°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F). In addition to relatively warm conditions, August experiences about 88 mm (3.5 in) of precipitation over 12 days, accompanied by a humidity level of 73%. In stark comparison, December sees a significant drop in temperatures, ranging from a chilling minimum of -39°C (-38°F) to a maximum of just 3°C (38°F), with an average of -17°C (2°F). Precipitation is much lower in December, totaling 19 mm (0.7 in) over a mere 5 days, while humidity rises to a high 96%. For more details, you can check Irkutsk weather in December.
As summer draws to a close, August weather in Irkutsk presents a delightful blend of warmth and humidity, offering a stark contrast to the cooler spring months and the chilly winters that follow. With maximum temperatures reaching a pleasant 30°C (86°F), the city enjoys its warmest days of the year, inviting both locals and visitors to embrace the outdoors. However, be prepared for some rain, as the month sees an average of 88 mm of precipitation over approximately 12 days. This unique combination of warmth and moisture not only enhances the vibrancy of the surrounding landscapes but also signifies a transition toward the crisp autumn air. For a deeper dive into the weather patterns of this fascinating city, check out Irkutsk Climate.