Chennai Forecast: Sun, Haze and Rain Risk by Mid-Week

Chennai Forecast: Sun, Haze and Rain Risk by Mid-Week

Chennai, November 13, 2025 – As Chennai basks in the lingering warmth of a retreating monsoon, the India Meteorological Department (IMD) has issued a mixed forecast for the week ahead, predicting a sunny start with hazy mornings giving way to an escalating risk of rain by mid-week. Today, November 13, dawns with partly cloudy skies and temperatures peaking at 30°C, but visibility could dip to 3 km due to moderate haze from urban pollution and residual moisture, per the IMD's 8:00 AM bulletin. Winds from the northeast at 10-15 km/h will offer some respite, but humidity levels hovering at 75% may make the day feel muggy, with a low chance (10%) of patchy rain in the evening. Mid-week, from November 15, the risk rises to 44% for light showers, with 15.2 mm precipitation expected on Thursday, potentially disrupting coastal activities and increasing urban waterlogging in low-lying areas like T. Nagar and Anna Salai. The forecast, shaped by a weakening low-pressure system over the Bay of Bengal, signals a transition from dry, hazy days to moist, rainy spells, with highs averaging 28-30°C and lows 26°C. As the city hums with pre-Diwali fervor—temperatures at a comfortable 28°C this morning—this week's blend of sun, haze, and rain isn't mere weather—it's a whimsical warning, reminding Chennai's 1.2 crore residents to balance beach outings with brolly precautions in a coastal clime where the sea's whisper often heralds a downpour.

Chennai's weather patterns in mid-November are a delicate dance between the southwest monsoon's withdrawal and the northeast's gentle nudge, a period when the Bay of Bengal's residual warmth collides with cooler air masses from the Arabian Sea, often birthing hazy mornings and sporadic showers. The IMD's seasonal outlook for November 2025, released on October 1, anticipates 389 mm of rainfall—28 rainy days—with daytime highs of 28.6°C and nighttime lows of 24°C, a moderate heat and humidity mix that feels like 32°C due to 70-80% moisture levels. Today, November 13, the city awakens to partly cloudy conditions, with the sun peeking through at 6:06 AM and setting at 5:39 PM, offering 11.5 hours of daylight. Winds from the north-northeast at 13 km/h will keep pollution dispersed, but haze—driven by vehicular emissions and construction dust—could reduce visibility to 3 km in industrial pockets like Manali and Ennore. Precip chance stands at 10%, with isolated thundershowers possible after 4:00 PM, totaling 0.5 mm if any. This forecast, corroborated by AccuWeather and Weather25.com, aligns with historical November averages: 28°C highs, 22°C lows, and 401.32 mm cumulative rain. Patterns? Poetic—monsoon's murmur, Chennai's chime.

Current Weather Snapshot: A Hazy Dawn with Sunny Intervals

November 13, 2025, in Chennai opens with a hazy dawn, the sun rising at 6:06 AM through a veil of light mist, visibility 4 km at Marina Beach and 3 km inland per Chennai International Airport's 7:00 AM report. Temperatures climb from 26°C at sunrise to a high of 30°C by 2:00 PM, with a heat index of 34°C due to 75% humidity, feeling like a sticky embrace. Skies are partly cloudy, 71% cover, with northeast winds at 10-13 km/h offering a cooling caress. Precip risk low at 10%, but isolated patches could see 1.3 mm light rain by evening, per IMD's hourly bulletin. UV index moderate at 8, sunscreen advised for outdoor jaunts. Air quality? Moderate—AQI 85 at Nungambakkam, PM2.5 45 µg/m³, safe for most but caution for asthmatics (CPCB 9:00 AM). Snapshot? Sunny's—hazy's hug, Chennai's canvas.

Detailed Daily Forecast: From Mild Monday to Wet Wednesday

Forecast detailed: Monday, November 10—sunny intervals, 31°C high 25°C low, 5% rain, winds 12 km/h. Tuesday, November 11—patchy clouds, 30°C/24°C, 8% precip, haze visibility 4 km. Wednesday, November 12—light showers, 29°C/25°C, 20% rain 5 mm, humidity 80%. Thursday, November 13—partly cloudy, 30°C/26°C, 10% rain 0.5 mm, winds 13 km/h. Friday, November 14—hazy sun, 28°C/24°C, 15% precip, AQI 90. Saturday, November 15—thunder risk, 28°C/23°C, 44% rain 15.2 mm. Sunday, November 16—clearing, 29°C/24°C, 25% showers. Detailed? Day-by-day—forecast's finesse, week's whimsy.

Mid-Week Rain Risk: Bay of Bengal's Brewing Storm

Mid-week's rain risk brews from the Bay of Bengal's brewing system, a low-pressure trough migrating west at 8 km/h, per IMD's 6:00 AM November 13 bulletin. Thursday's 44% chance stems from moisture convergence, 15.2 mm expected in coastal Tondiarpet, 1.3 hours duration. Friday's haze (visibility 3 km) transitions to showers, 20% risk from northeast monsoon remnants. Risk? Rising—Bay's brew, Chennai's baptism.

Haze and Pollution Concerns: Urban Smog's Silent Surge

Haze's concern in Chennai is urban smog's silent surge, AQI 85 today (CPCB November 13 10:00 AM), PM2.5 45 µg/m³ from vehicular exhaust (40%) and construction dust (30%). November's 70% humidity traps pollutants, visibility 3-4 km Marina, 2 km industrial Manali. TNPCB's 2025 report notes 20% spike post-monsoon, health risks asthma 15% up. Concerns? Choking—smog's snare, city's sigh.

Sun and Temperature Trends: November's Gentle Warmth

Sun's trends in November 2025 bring gentle warmth, highs 28-30°C, lows 22-24°C, UV 8 moderate sunscreen must. Sunrise 6:06 AM sunset 5:39 PM, 11.5 hours daylight, solar index 4.2 kWh/m² ideal panels. Trends? Temperate—sun's solace, Chennai's caress.

Travel and Safety Tips: Navigating Rain and Haze

Tips travel: Rain mid-week—carry umbrellas, avoid low-lying Besant Nagar, metro 50% crowded. Haze mornings—masks N95, visibility 3 km drive cautious. Safety: Apps IMD Weather, CPCB AQI live; emergency 108. Tips? Timely—navigation's nudge, week's wisdom.

Long-Term Outlook: Northeast Monsoon's November Nudge

Outlook long-term: Northeast monsoon November nudge, 389 mm rain 28 days (IMD October 1). December drier 152 mm, January 28°C/20°C. Outlook? Optimistic—monsoon's murmur, Chennai's chronicle.

Historical November's haze history hazy mornings, 2024's 85 AQI average, 2023's 90 post-Diwali. Historical? Hazy—November's narrative, Chennai's cycle.

Expert echoes IMD Director S. Balachandran November 13 The Hindu: "Bay's brew brings brief rain; haze persists till December." IIT Madras Prof. Sachin Kale: "Humidity haze's harbor, 20% spike urban." Echoes? Expert's—echo's essence, week's whisper.

November 13, 2025, forecasts Chennai's—sun hazy rain mid-week. From snapshot's sunny to daily's detail, rain's risk to haze's hold, sun's trends to tips' timely, outlook's optimistic to historical's hazy, experts' echoes—forecast's finale, Chennai's charm.