Last updated: August 27, 2025
May in Irkutsk, Russian Federation brings a delightful blend of spring warmth and occasional showers. The average temperature hovers around 10°C (50°F), with peaks reaching a sizzling 31°C (89°F), while the mercury can dip as low as -4°C (24°F) during the cooler nights. Rainfall is a regular visitor, with 48 mm (1.9 in) recorded over about 11 days, creating a humid atmosphere that averages 67% humidity. This dynamic weather pattern sets the stage for blooming landscapes and vibrant outdoor activities, making May a captivating month in Irkutsk.
In Irkutsk, May marks a noticeable transition as winter yields to the warmth of spring. With minimum temperatures averaging -4°C (24°F) and reaching a comfortable high of 31°C (89°F), the region experiences a significant warming trend compared to the biting cold of previous months. The average temperature climbs to 10°C (50°F), creating a delightful environment for both locals and visitors. As the city shakes off the icy grip of winter, May invites a lively atmosphere, showcasing nature’s rebirth amid melting snow and blooming flora. The dramatic shift from the harsh winter months to the burgeoning warmth of late spring is a vivid reminder of Irkutsk's unique climatic character.
In May, Irkutsk experiences a significant increase in precipitation, with 48 mm (1.9 in) of rainfall recorded over 11 days. This marks a notable uptick from the previous months, as spring fully unfolds and the landscape transforms with lush greenery. The shift from April's 19 mm (0.8 in) across 6 days to May’s robust totals highlights the arrival of the wetter season, setting the stage for the summer months ahead. As the city transitions into June, the precipitation maintains a similar level at 47 mm (1.8 in), sustaining the region's vibrant ecosystem and providing a refreshing contrast to the drier winter months. The increased rainfall is not just a meteorological change but a herald of nature's awakening in this beautiful part of Siberia.
As spring transitions into summer, May in Irkutsk brings a noticeable drop in humidity, falling to 67%. This marks a significant shift from the much higher levels of the preceding months, where January through April consistently hovered between 73% and 94%. The decrease signals a welcome respite from the damp chill of early spring, as the air becomes drier and more comfortable. Following May, humidity levels continue to gradually decline into June, reaching their annual low at 64%. However, as the summer unfolds, humidity begins to creep back up, hinting at the region's characteristic fluctuations throughout the year.
In May, Irkutsk experiences a noticeable spike in UV exposure, with the UV Index reaching 7, classified as high. This marks a significant increase compared to the previous months—January and February saw a low Index of 1 and 2, respectively—highlighting the shift toward sunnier days as spring unfolds. By March and April, the Index rises to 4 and 5, reflecting a moderate risk, but May's 25-minute burn time signals the need for extra caution. As summer approaches, the intensity escalates further in June and July, peaking at 8. It's essential for residents and visitors to stay informed and protected. For more detailed insights on UV levels, check out Irkutsk UV Index.
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As May unfolds in Irkutsk, the city basks in an impressive 358 hours of sunshine, marking a significant increase from the sunshine hours of the preceding months. Following the gradual ascent from January's 166 hours to April's 333 hours, May represents a vibrant transition into spring, bringing longer days and the promise of warmth. This trend of increasing sunlight continues into June, which reaches its peak with 376 hours. However, as summer wanes, the sunlight begins to taper off, illustrating the cyclical nature of the seasons in this stunning region. The steady rise and subsequent decline in sunshine hours not only enhance the natural beauty of Irkutsk but also invigorate the spirits of its residents as they relish the longer, brighter days of late spring.
As May rolls around in Irkutsk, the likelihood of sunny weather stands at 29%, mirroring a trend often seen in early spring. After a promising increase in March, which boasts a 48% chance of sunshine, April faces a slight decline to 40%. This downward turn continues into May, suggesting that the region's transition into summer may not yet fully embrace the bright rays often anticipated. However, the following months, particularly October, exhibit a surprising resurgence with a 53% chance of sun, hinting that Irkutsk's weather patterns are as unpredictable as they are fascinating. The varying percentages throughout the year emphasize the need for resilience and adaptability in enjoying the fleeting sunny moments in this beautiful region.
In Irkutsk, the progression of daylight hours throughout the year reveals a striking seasonal rhythm. As winter leaves its grip, January offers only 8 hours of daylight, gradually increasing to 9 hours in February. By March, the days grow noticeably longer, reaching 11 hours, and in April, they stretch to 13 hours. May marks a delightful peak, where sunshine lasts 15 hours, heralding the full embrace of summer. The longest days occur in June and July, basking in a generous 16 hours of daylight. However, as summer transitions to fall, daylight gracefully begins to wane, with 14 hours in August, tapering to 12 in September, and further diminishing to 10 hours by October. The cycle then returns to its winter trough, with just 7 hours of daylight in December. This annual dance of light encapsulates the unique charm of Irkutsk's natural rhythms.
In May, Irkutsk experiences a gentle increase in wind, with winds reaching an average speed of 3.2 m/s (7 mph). This marks a notable rise from previous months, hinting at the transition into warmer days. Following a gradual climb from 2.5 m/s (6 mph) in January to 2.9 m/s (7 mph) in April, the winds in May often carry a refreshing quality, perfect for outdoor activities. As summer approaches in June, the wind speed tapers back to 2.9 m/s (7 mph), suggesting a consistent yet soothing breeze that characterizes the region's late spring and early summer. Overall, this trend reflects a dynamic climate in Irkutsk, where the winds shift gracefully through the seasons, inviting residents and visitors alike to enjoy the crisp, invigorating air of May.
Weather in Irkutsk varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Irkutsk, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in May and January, there is a stark contrast in temperatures and conditions. May experiences a wide temperature range, with lows of -4°C (24°F) and highs reaching up to 31°C (89°F), making it a much warmer month on average at 10°C (50°F). Additionally, May's precipitation of 48 mm (1.9 in) occurs over 11 days, while January sees significantly colder averages, with temperatures ranging from a chilling -41°C (-41°F) to a maximum of only -5°C (24°F). On top of this, January's precipitation is minimal at 12 mm (0.5 in) over just 4 days, but it also comes with high humidity at 94%. For a more detailed look at January weather, visit Irkutsk weather in January.
May and February present striking contrasts in weather, showcasing the transition from winter to spring. In May, temperatures can range significantly, with a minimum of -4°C (24°F) and a maximum of 31°C (89°F), leading to a comfortable average of 10°C (50°F). This month also sees a moderate amount of precipitation at 48 mm (1.9 in) over about 11 days, coupled with a humidity level of 67%. In stark contrast, February is characterized by its frigid temperatures, with a chilling minimum of -40°C (-39°F), an average temperature of -16°C (3°F), and a maximum of just 5°C (41°F). Precipitation is minimal at 11 mm (0.4 in), occurring over only 4 days, although the humidity is relatively high at 90%. These differences highlight the harshness of winter in February compared to the mild and variable weather that May offers. For more detailed insights, visit Irkutsk weather in February.
In comparing the weather of May and March, it is evident that May experiences significantly milder temperatures, with a minimum of -4°C (24°F) and an average temperature of 10°C (50°F), compared to March's chilling minimum of -30°C (-22°F) and average of -5°C (23°F). March also sees a much larger swing in daytime temperatures, peaking at 12°C (54°F), while May can reach up to 31°C (89°F). Additionally, May has more precipitation at 48 mm (1.9 in) over 11 days, while March sees only 16 mm (0.6 in) over just 4 days. Despite May's lower humidity of 67%, March remains quite humid at 81%. For a detailed look at March weather, you can refer to Irkutsk weather in March.
In comparing the weather between April and May, it's evident that May brings significantly warmer temperatures, with a minimum of -4°C (24°F) and an average of 10°C (50°F), while April experiences colder temperatures, ranging from a minimum of -11°C (13°F) to an average of 4°C (39°F). May boasts a higher maximum temperature of 31°C (89°F) compared to April's max of 28°C (82°F). Additionally, May receives more precipitation, recording 48 mm (1.9 in) over 11 days, whereas April has only 19 mm (0.8 in) across 6 days. Humidity is slightly lower in May at 67%, while April maintains a higher humidity level of 73%. For more detailed information, check out Irkutsk weather in April.
In May, temperatures in Irkutsk range from a chilly minimum of -4°C (24°F) to a warm maximum of 31°C (89°F), with an average of 10°C (50°F). The month experiences around 48 mm (1.9 in) of precipitation over approximately 11 days, accompanied by a humidity level of 67%. Conversely, June sees an increase in average temperatures, with a minimum of 2°C (37°F) and a maximum of 33°C (92°F), resulting in an average temperature of 16°C (61°F). Rainfall remains relatively stable at 47 mm (1.8 in) across about 10 days, with slightly lower humidity levels of 64%. For more detailed information, you can check Irkutsk weather in June.
May and July offer distinct weather experiences. May starts with cooler temperatures, where the minimum can drop to -4°C (24°F) and the average hovers around 10°C (50°F), while reaching a maximum of 31°C (89°F). It has relatively low precipitation, with 48 mm (1.9 in) spread over about 11 days and a humidity level of 67%. In contrast, July presents warmer conditions, with a minimum temperature of 8°C (46°F) and an average of 19°C (66°F), peaking at 32°C (90°F). However, it also sees increased rainfall, totaling 96 mm (3.8 in) over 12 days and slightly higher humidity at 71%. For detailed insights, check out Irkutsk weather in July.
May and August in Irkutsk exhibit distinct weather characteristics that highlight the transition from early spring to late summer. In May, temperatures range from a brisk low of -4°C (24°F) to a warm high of 31°C (89°F), with an average temperature of 10°C (50°F). The month sees approximately 48 mm (1.9 in) of precipitation over 11 days, with humidity levels around 67%. In contrast, August offers a milder climate with temperatures fluctuating from a minimum of 4°C (39°F) to a maximum of 30°C (86°F), averaging 17°C (63°F). Rainfall increases to 88 mm (3.5 in) across 12 days, and humidity also rises slightly to 73%. For further details, check out Irkutsk weather in August.
May and September offer contrasting weather patterns, showcasing the transition from late spring to early autumn. In May, temperatures range from a chilly minimum of -4°C (24°F) to a warm maximum of 31°C (89°F), with an average of 10°C (50°F). The month experiences a moderate level of precipitation at 48 mm (1.9 in) over 11 days and has a humidity level of 67%. Conversely, September has a narrower temperature range, with minimums of -1°C (31°F) and maximums of 26°C (79°F), averaging around 11°C (52°F). This month sees increased precipitation, totaling 75 mm (2.9 in) across 10 days, along with a higher humidity level of 84%. For further details, you can visit Irkutsk weather in September.
May and October present starkly contrasting weather conditions. In May, temperatures can range from a chilly -4°C (24°F) to a warm 31°C (89°F), with an average of 10°C (50°F). This month sees about 48 mm (1.9 in) of precipitation over 11 days, with humidity levels at 67%. In contrast, October features cooler temperatures, with minimums dropping to -8°C (18°F) and a maximum of 22°C (71°F), averaging just 3°C (37°F). Rainfall in October is lighter at 25 mm (1.0 in) across 6 days, but humidity rises to 84%. For a detailed look at the weather specifics for October, you can visit Irkutsk weather in October.
May and November present starkly contrasting weather patterns. In May, temperatures can range from a chilly -4°C (24°F) at night to a warm 31°C (89°F) during the day, with an average of 10°C (50°F). The month experiences about 48 mm (1.9 in) of precipitation over 11 days, accompanied by a relative humidity of 67%, making it feel quite comfortable. In contrast, November brings significantly colder conditions, with temperatures dipping to a minimum of -28°C (-18°F) and averaging around -7°C (20°F). The days are much shorter, with a modest 10°C (50°F) as the maximum temperature. However, November is relatively dry, seeing only 13 mm (0.5 in) of precipitation across 4 days, but the humidity is notably higher at 90%. For more details, you can check Irkutsk weather in November.
May and December present starkly contrasting weather conditions. In May, temperatures can range from a chilly -4°C (24°F) to a warm 31°C (89°F), with an average of 10°C (50°F) and relatively moderate humidity at 67%. This month experiences about 48 mm (1.9 in) of precipitation over 11 days, signaling the transition into spring.
In contrast, December plunges into the depths of winter, with temperatures averaging a frigid -17°C (2°F). The highs only reach 3°C (38°F), while the lows can plummet to -39°C (-38°F). Despite the extreme cold, precipitation is lower at 19 mm (0.7 in) over just 5 days, coupled with a high humidity level of 96%. For a more detailed view of December weather conditions, you can check out Irkutsk weather in December.
As May unfolds in Irkutsk, it marks a transition from the lingering chill of winter to the warmer embrace of summer. With average temperatures rising to a mild 10°C and highs peaking at an invigorating 31°C, the month sets the stage for outdoor activities and blossoming landscapes. Despite experiencing some rain, with precipitation on about 11 days, the humidity at 67% creates a fresh atmosphere, distinct from the drier summer months ahead. This unique character of May offers a refreshing preview of the vibrant summer season to come. For more insights on the temperature and overall climatic trends, visit Irkutsk Climate.