Last updated: August 21, 2025
Chennai experiences a hot and humid July, with temperatures soaring to a maximum of 36°C (97°F) and settling at an average of 30°C (86°F). The city witnesses a relatively cooler minimum of 26°C (79°F) during the nights. Amidst the heat, July brings significant precipitation, with an average of 107 mm (4.2 in) across 16 days, contributing to the region's lush greenery. With humidity levels hovering around 80%, the weather can feel quite muggy, making light, breathable clothing a must for both residents and visitors navigating this vibrant coastal city.
In July, Chennai experiences a warm and humid climate, with temperatures ranging from a minimum of 26°C (79°F) to a maximum of 36°C (97°F), and an average of 30°C (86°F). This month marks a slight dip in maximum temperatures compared to June, but the humidity often makes it feel warmer. The pattern of rising temperatures from the previous months is evident, as July retains the summer warmth while also ushering in the monsoon season, providing much-needed rainfall. As the city surfaces from the heat of earlier months, the combination of warmth and moisture creates a unique atmosphere, often leading to refreshing showers that contrast with the oppressive heat experienced just a few weeks prior.
July marks a significant turning point in Chennai's precipitation patterns, with rainfall reaching a notable 107 mm (4.2 in) over 16 days. This surge not only emphasizes the peak of the monsoon season but also sets the stage for the heavier downpours that follow in August and September. The dramatic increase from June's 64 mm (2.5 in) signals the transition into a wetter climate, showcasing Chennai's vulnerability to seasonal shifts. As the city embarks on this rainy phase, the lush greenery awakens, underscoring the essential role of July's rainfall in sustaining the region's ecosystem and agriculture.
In July, Chennai experiences a notable humidity level of 80%, which reflects a slight decline from the higher June humidity of 81%. This month typically marks a turning point, as Chennai begins to transition toward the tail end of the monsoon season. Overall, the humidity trends in Chennai showcase relatively consistent levels throughout the year, fluctuating between the 76% mark in the cooler months and peaking at 83% during the warmer pre-monsoon months of April and May. As the rains pour in, July's humidity remains quite moderate in comparison to the summer highs, setting an atmospheric balance that characterizes the tropical climate of this vibrant city.
In July, Chennai experiences a UV Index of 13, placing it in the extreme exposure category with a burn time of just 10 minutes. Following a pattern established in prior months, the city continues to endure high UV levels, reflective of the intense summer sun that characterizes this region. January begins with a lower UV Index of 9, gradually escalating through the months, peaking in April at 14 before remaining consistently extreme from February to June and continuing into July. With the UV Index hovering around 13 through the remaining summer months, it's vital for residents and visitors alike to take necessary precautions against sun exposure. For detailed insights on UV levels, check out Chennai UV Index.
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Amidst the vibrant tapestry of Chennai’s July, the city basks in 304 hours of sunshine, continuing a trend of generous sunlight during the summer months. July sits comfortably within a series of sun-drenched days that peak in March and May, boasting the highest totals of approximately 347 and 352 hours, respectively. This steady abundance of sunshine gradually tapers off as the monsoon approaches, with August and September showing a slight decline to 301 and 293 hours. Despite this, July maintains a bright and lively atmosphere, inviting both locals and visitors to enjoy outdoor activities under a typically warm sky. As the year progresses, the sunshine remains a defining feature of Chennai's climate, ensuring that even in the heat of summer, the city remains illuminated and vibrant.
In Chennai, India, the likelihood of experiencing sunny weather significantly diminishes as summer transitions into the monsoon season, particularly in July where the chance of sunshine plummets to a mere 18%. This trend of decreasing sunlight is quite stark when compared to earlier months such as February and March, which enjoy sun probabilities of 70% and 69%, respectively. Even as June showcases a hint of sunshine at 24%, July's gloomy forecasts indicate a dramatic shift towards overcast skies and increased rainfall. As the year progresses, residents and visitors can expect the lowest likelihood of sun in July, underscoring the importance of planning for indoor activities or embarking on adventures that embrace the refreshing monsoon atmosphere.
In Chennai, India, the daylight duration remains remarkably consistent throughout the year. Starting with 11 hours of daylight in January and February, the city begins to experience a gradual increase as spring approaches, reaching 12 hours by March. This steady duration of 12 hours continues from March through August, providing ample sunlight during the warmer months. As the year transitions towards the end of summer, daylight hours revert to 11 hours in October and remain so through December, creating a rhythmic cycle of light that characterizes the tropical climate of the region. This consistency in daylight duration presents a unique charm, making Chennai a vibrant destination year-round.
In July, Chennai experiences a pleasant average wind speed of 4.0 m/s (9 mph), marking a slight dip from the previous month but still maintaining a refreshing breeze amidst the peak of summer. The wind patterns reveal a gradual increase from March's calm 2.6 m/s (6 mph), peaking in June before stabilizing in July. This trend indicates a seasonal shift where the summer heat is somewhat alleviated by stronger winds, making outdoor activities more enjoyable. As the city transitions into August, we can expect the wind speeds to settle back to around 3.5 m/s (8 mph), reflecting the return of the quieter air typical for late summer in this vibrant coastal metropolis.
Weather in Chennai varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in Chennai, focusing on differences in temperature, rainfall, humidity, and UV levels.
July and January present contrasting weather patterns. July experiences significantly warmer temperatures, with a minimum of 26°C (79°F) and an average of 30°C (86°F), peaking at 36°C (97°F). This month also sees considerable rainfall, with around 107 mm (4.2 in) over 16 days, contributing to a high humidity level of 80%. In contrast, January offers milder temperatures, ranging from a minimum of 20°C (68°F) to an average of 25°C (78°F), and a maximum of 30°C (86°F). The month is relatively dry with only 32 mm (1.3 in) of precipitation over just 5 days, accompanied by a slightly lower humidity of 76%. For more details on January's weather, you can visit Chennai weather in January.
July and February present quite different weather patterns. In July, temperatures range from a minimum of 26°C (79°F) to a maximum of 36°C (97°F), with an average of 30°C (86°F). This month experiences significant precipitation, totaling 107 mm (4.2 in) over about 16 days, coupled with high humidity levels at 80%. In contrast, February enjoys milder temperatures, with a minimum of 20°C (68°F) and a maximum of 31°C (88°F), averaging 26°C (79°F). Precipitation is minimal at only 10 mm (0.4 in) over just 1 day, with humidity slightly lower at 76%. For further details, you can check Chennai weather in February.
In comparing the weather of July and March, July experiences consistently higher temperatures, with average highs reaching 36°C (97°F) compared to March's maximum of 35°C (95°F). However, March has a slightly higher minimum temperature of 22°C (72°F) versus July's 26°C (79°F). Notably, July is characterized by significant rainfall, receiving 107 mm (4.2 in) over approximately 16 days, while March sees minimal precipitation of just 6 mm (0.2 in) on only 1 day. Humidity levels are similar in both months, with July at 80% and March at 81%. For a more detailed overview of March weather in Chennai, you can visit Chennai weather in March.
When comparing the weather in July and April, we see some notable differences. July typically experiences slightly higher temperatures, with a minimum of 26°C (79°F) and a maximum of 36°C (97°F), compared to April's minimum of 25°C (78°F) and maximum of 35°C (96°F). Both months have the same average temperature of 30°C (86°F), but July is considerably wetter, with 107 mm (4.2 in) of precipitation over 16 days, while April only receives 8 mm (0.3 in) of rain across just 1 day. Humidity levels are fairly high in both months, with July at 80% and April at 83%, making April slightly more humid overall. For more detailed information on April weather, you can refer to Chennai weather in April.
In comparing the weather between July and May, we see notable differences in both temperature and precipitation patterns. July typically experiences a minimum temperature of 26°C (79°F) and averages around 30°C (86°F) with a maximum of 36°C (97°F). In contrast, May has similar minimum temperatures but tends to be hotter on average at 31°C (88°F) and can reach up to 38°C (100°F). While July sees more precipitation, totaling 107 mm (4.2 in) over 16 days, May is significantly drier, with only 13 mm (0.5 in) over just 3 days. Humidity levels are relatively close, with July at 80% and May slightly higher at 83%. For more insights into this month's climate, you can check Chennai weather in May.
In comparing the weather of June and July, July experiences slightly lower average temperatures, with a minimum of 26°C and a maximum of 36°C, compared to June's higher average of 31°C and a maximum of 37°C. However, July sees an increase in precipitation, totaling 107 mm over 16 days, whereas June has only 64 mm of rain spread across 12 days. Humidity remains relatively stable, with July at 80% and June slightly higher at 81%. For more detailed information on June's weather patterns, you can visit Chennai weather in June.
In comparing the weather of July and August, both months experience high temperatures, with July having an average temperature of 30°C (86°F) and a maximum of 36°C (97°F), while August sees a slight dip in the average to 29°C (85°F), with a maximum of 35°C (95°F). Humidity remains high in both months, increasing slightly from 80% in July to 82% in August. Precipitation levels also rise in August, with 125 mm (4.9 in) over 19 days, compared to July's 107 mm (4.2 in) over 16 days. For more details on the specific weather patterns during this time, you can check Chennai weather in August.
In comparing the weather between July and September, both months exhibit warm temperatures, but July tends to be slightly hotter overall. July experiences a minimum temperature of 26°C (79°F) and an average high of 36°C (97°F), while September's temperatures are marginally cooler, with a minimum of 25°C (77°F) and a maximum of 34°C (93°F). However, September sees a higher average precipitation of 126 mm (5.0 in) over 19 rainy days compared to July's 107 mm (4.2 in) across 16 days. Interestingly, humidity levels remain relatively similar, with July at 80% and September at 81%. For more detailed insights, check out Chennai weather in September.
In comparing the weather between July and October, July emerges as the hotter month, with average temperatures reaching 30°C (86°F) and maximums peaking at 36°C (97°F). However, October sees a slight decrease in temperature, averaging 28°C (83°F) with a maximum of 33°C (93°F). Precipitation levels are notably higher in October, totaling 169 mm (6.7 in) over 21 days, compared to July’s 107 mm (4.2 in) across 16 days. Despite the increased rainfall, humidity remains relatively consistent, hovering around 79% in October, slightly lower than July’s 80%. For more information on the specific weather trends in October, you can check Chennai weather in October.
In comparing the weather between July and November, July typically enjoys warmer temperatures, with a minimum of 26°C (79°F) and an average of 30°C (86°F), peaking at 36°C (97°F). However, it experiences significant rainfall, totaling 107 mm (4.2 in) over about 16 days, accompanied by high humidity levels of 80%. In contrast, November is cooler, with a minimum temperature of 23°C (74°F) and an average of 27°C (81°F), reaching a maximum of 32°C (90°F). November sees a higher level of precipitation, accumulating 377 mm (14.9 in) over 20 days, while maintaining the same humidity level of 80%. For more details, check out Chennai weather in November.
In July, the weather is typically hotter, with average temperatures reaching around 30°C (86°F) and maximums peaking at 36°C (97°F). The month experiences significant humidity at 80% and sees approximately 107 mm (4.2 in) of rainfall spread across 16 days. In contrast, December offers a milder climate, with average temperatures dropping to 26°C (79°F) and maximums reaching 30°C (87°F). Rainfall in December is slightly higher at 109 mm (4.3 in), but it occurs over fewer days, just 10. Overall, while both months are relatively humid, December's weather is generally more comfortable compared to the heat of July. For more detailed information, you can check out Chennai weather in December.
As July unfolds in Chennai, the city experiences a significant shift in weather compared to other months. With temperatures averaging around 30°C (86°F) and a maximum reaching up to 36°C (97°F), it notably contrasts with the peak summer heat. The month is characterized by increased humidity, often hovering around 80%, and frequent rainfall, accumulating about 107 mm (4.2 in) across approximately 16 days. This combination of heat and moisture brings a lush vibrancy to the landscape, setting the stage for the monsoon season. For a deeper understanding of how July fits into the broader climate patterns, check out Chennai Climate.