Chennai Cooler, Drier: What It Means for Northeast Monsoon and Water Supply
Everything live for Chennai, in one place.
As of 17 October 2026, Chennai is at 27°C and overcast, with a 24% chance of rain. Petrol costs ₹107.74/L and diesel ₹99.55/L here today.
Air is unhealthy today, about the same as yesterday. Expect heavy rain after 9 PM. It will feel hotter than the thermometer says.
Cost of Living & Breathing Index in Chennai: 60/100 (Fair)
Rank #128 of 274 tracked cities · flat vs 30 days ago
What's driving this score
Score starts at 100 and only tracks two things: today's air quality and how the local fuel price compares to the national average. Chennai's AQI of 469 took off 40 points; fuel here is above the national average and took off 0.4 more - leaving 60/100. This isn't a full cost-of-living measure, only these two.
🕒 Updated 16 Oct 2026, 8:58pm
Live Air Quality in Chennai Today: 469 (Severe)
Flat vs yesterday
Last 7 days
Pollutant breakdown
CO is driving Chennai's Air Quality Index (AQI) right now - it's the pollutant with the worst sub-index, which is what the overall number is based on (the Central Pollution Control Board (CPCB)'s National AQI methodology takes the worst reading, not an average).
🕒 Updated 16 Oct, 10:20 PM IST · next refresh in ~113 min
Live Weather in Chennai Today: 27°C, Overcast
78% humidity · down 1° yesterday
Today, hour by hour
27°
💧24%
27°
💧24%
27°
💧24%
27°
💧24%
27°
💧24%
26°
💧24%
27°
💧24%
27°
💧22%
28°
💧57%
29°
💧56%
29°
💧54%
29°
💧22%
29°
💧24%
28°
💧25%
28°
💧23%
27°
💧23%
27°
💧23%
27°
💧23%
27°
💧23%
28°
💧22%
28°
💧22%
27°
💧73%
27°
💧53%
27°
💧24%
☀️ Best window outdoors today: 11 AM–8 PM - lower rain chance and comfortable temperatures.
🕒 Updated 16 Oct, 9:34 AM IST · next refresh in ~7 min
Chennai Petrol and Diesel Rates Today: ₹107.74 and ₹99.55
Petrol down ₹0.02 yesterday
Chennai Auspicious Times for Today
Sunrise 6:35 AM · Sunset 6:03 PM · Rahu Kalam 10:53 AM-12:19 PM
Chennai Bank Status Today: Closed
Closed today - Maha Saptami
Banks in Tamil Nadu are closed today (Maha Saptami).
Weather Alerts for Chennai Today
No active IMD weather alerts for Tamil Nadu right now.
Compare Chennai with Nearby Cities
vs Tiruvallur, Chengalpattu and 4 more nearby cities
| City | Distance | AQI | vs Chennai | Temp | Rain |
|---|---|---|---|---|---|
| Chennai YOU ARE HERE | — | 469 | — | 27°C | 24% |
| Tiruvallur 🌦️ 🌬️ ⛽ | 40 km | — | — | 27°C | 29% |
| Chengalpattu 🌦️ 🌬️ ⛽ | 54 km | — | — | 26°C | 34% |
| Kanchipuram 🌦️ 🌬️ ⛽ | 67 km | — | — | 26°C | 30% |
| Tirupathur 🌦️ 🌬️ ⛽ | 75 km | — | — | 26°C | 30% |
| Ranipet 🌦️ 🌬️ ⛽ | 104 km | — | — | 25°C | 38% |
| Tirupati 🌦️ 🌬️ ⛽ | 113 km | 335 | ✓ 29% better | 25°C | 26% |
Live Chennai Mandi Prices Today
Tiruvallur(Uzhavar Sandhai )9 items
- Coconut₹6,000/q
- Lemon₹18,000/q
- Colacasia₹5,000/q
- Banana₹7,000/q
- Bitter gourd₹7,000/q
- Amaranthus₹3,000/q
- Green Chilli₹5,000/q
- Green Avare(W)₹7,000/q
- Brinjal₹4,000/q
Chennai PIN Codes / Postal Index Number
154 post offices across 85 PIN codes in Chennai, Tamil Nadu.
Showing 1–30 of 154 post offices
| Post Office | Pincode | Office Type | Delivery |
|---|---|---|---|
|
Adambakkam S.O Chennai City South Division · Tamilnadu Circle |
600088 | PO | Delivery |
|
Adyar S.O (Chennai) Chennai City South Division · Tamilnadu Circle |
600020 | PO | Delivery |
|
Alandur(Reopened W.E.F.6.6.05) S.O Chennai City South Division · Tamilnadu Circle |
600016 | PO | Non Delivery |
|
Alapakkam BO Tambaram Division · Tamilnadu Circle |
600116 | BO | Non Delivery |
|
Alwarthirunagar S.O Chennai City South Division · Tamilnadu Circle |
600087 | PO | Delivery |
|
Ambattur HO Tambaram Division · Tamilnadu Circle |
600053 | HO | Delivery |
|
Ambattur Indl Estate SO Tambaram Division · Tamilnadu Circle |
600058 | PO | Delivery |
|
Aminjikarai S.O Chennai City North Division · Tamilnadu Circle |
600030 | PO | Non Delivery |
|
Anna Nagar East S.O Chennai City North Division · Tamilnadu Circle |
600102 | PO | Delivery |
|
Anna Nagar S.O (Chennai) Chennai City North Division · Tamilnadu Circle |
600040 | PO | Delivery |
|
Anna Nagar Western Extn S.O Chennai City North Division · Tamilnadu Circle |
600101 | PO | Delivery |
|
Anna Road H.O Anna Road H.O Division · Tamilnadu Circle |
600002 | HO | Delivery |
|
Arumbakkam North Chennai City North Division · Tamilnadu Circle |
600106 | PO | Non Delivery |
|
Arumbakkam S.O Chennai City North Division · Tamilnadu Circle |
600106 | PO | Delivery |
|
Ashoknagar S.O (Chennai) Chennai City South Division · Tamilnadu Circle |
600083 | PO | Delivery |
|
Athipattu BO Tambaram Division · Tamilnadu Circle |
600058 | BO | Non Delivery |
|
Ayapakkam BO Tambaram Division · Tamilnadu Circle |
600077 | BO | Non Delivery |
|
Aynavaram S.O Chennai City North Division · Tamilnadu Circle |
600023 | PO | Delivery |
|
Besantnagar S.O Chennai City South Division · Tamilnadu Circle |
600090 | PO | Delivery |
|
Chennai Airport S.O Chennai City South Division · Tamilnadu Circle |
600016 | PO | Non Delivery |
|
Chennai G.P.O. Chennai GPO Division · Tamilnadu Circle |
600001 | HO | Delivery |
|
Chepauk S.O Chennai City Central Division · Tamilnadu Circle |
600005 | PO | Non Delivery |
|
Chetput S.O Chennai City North Division · Tamilnadu Circle |
600031 | PO | Delivery |
|
Chintadripet Chennai City North Division · Tamilnadu Circle |
600002 | PO | Non Delivery |
|
Choolaimedu S.O Chennai City Central Division · Tamilnadu Circle |
600094 | PO | Delivery |
|
DPI S.O Chennai City Central Division · Tamilnadu Circle |
600006 | PO | Non Delivery |
|
Dr Ambedkar Law Univeristy Chennai City South Division · Tamilnadu Circle |
600113 | PO | Non Delivery |
|
EGMORE MDO Chennai City North Division · Tamilnadu Circle |
600008 | PO | Delivery |
|
EGMORE NDSO Chennai City North Division · Tamilnadu Circle |
600008 | PO | Non Delivery |
|
Engineering College S.O (Chennai) Chennai City South Division · Tamilnadu Circle |
600025 | PO | Delivery |
Gas Price
How is Chennai's AQI calculated?
The Air Quality Index combines PM2.5, PM10, NO₂, SO₂, CO and O₃ readings from CPCB-monitored stations into one 0–500 score, using whichever pollutant reads worst as the overall number rather than an average of all of them. Today the dominant pollutant driving that number in Chennai is CO. Chennai's current AQI of 469 falls in the "Severe" band (400+).
Is Chennai's air quality safe today?
Not fully - Chennai is at Severe today (AQI 469). Avoid all outdoor activity. This level affects even healthy people.
Why does 27°C feel like 30°C in Chennai?
"Feels like" factors in humidity and wind on top of the actual air temperature. At 78% humidity and 6 kph wind, Chennai's air right now feels hotter than the thermometer reading - high humidity slows sweat evaporation, so your body sheds heat less efficiently than the raw air temperature alone would suggest.
What are today's petrol and diesel prices in Chennai?
Petrol is ₹107.74/L, diesel ₹99.55/L, for Chennai. Fuel prices are revised daily and can vary slightly by station. The base crude and refinery cost is the same nationwide - state VAT and cess are what make petrol cheaper or pricier just across a state line.
Why does Chennai's gold price match the national rate?
Gold is one national spot rate, not set city by city - Chennai's price tracks the same international gold market and the day's USD/INR exchange rate as everywhere else in India.
Are banks open in Chennai today?
No - banks in Tamil Nadu are closed today (Maha Saptami).
What is Rahu Kalam in Chennai today?
Rahu Kalam in Chennai today runs from 10:53 AM to 12:19 PM. Hindu tradition treats this window as inauspicious for starting new ventures, travel, or important decisions.
Why Check Chennai's Weather and AQI?
Chennai is a major auto-manufacturing and IT-services hub and one of India's busiest ports, with a metro population over 4.6 million. What makes its weather genuinely different from the rest of India: Chennai gets most of its annual rain not from the southwest monsoon that dominates the rest of the country, but from the northeast monsoon between October and December - a pattern that catches people expecting a June-September rainy season off guard.
Northeast Monsoon and Water Supply Impact
That October-December window has produced Chennai's worst flooding events, most notably in December 2015, and the same season plays a large role in refilling the reservoirs the city depends on - meaning a weak northeast monsoon directly threatens water supply for the following year, as the 2019 water crisis showed. Auto and electronics manufacturers around the city also plan logistics windows around this season. Track Chennai weather closely from October through December.
Seasonal Guide
Jan-Feb: Cooler, Drier - Chennai's most comfortable stretch of the year.
Mar-Jun: Hot, Humid Summer - High heat combined with coastal humidity; water availability is a recurring concern in dry years.
Oct-Dec: Northeast Monsoon - The city's main rainy season and its highest flood risk; check Chennai AQI and rain alerts together during this stretch.
Data Methodology
Weather and AQI figures are drawn from public government monitoring sources and refreshed regularly. See Tamil Nadu weather and AQI for how Chennai compares with other cities in the state.