Nayāgarh — Seasonal Pollution Patterns
Month-by-month air quality patterns for Nayāgarh across 3 years of CPCB data. Based on CPCB station data, 2016–present.
Odisha · Live Nayāgarh AQI →
At a glance
Based on 3 years of CPCB monitoring across 1 stations, Nayāgarh averages AQI 116 annually, with a pronounced seasonal pattern classified as flat year-round. The worst month is April at AQI 186 (Moderate) and the cleanest is July at AQI 40 (Good) — a 146-point swing between them. Severe days (AQI > 400) make up 0% of the record while Good-or-Satisfactory days account for 47.4%.
The four seasons
Indian meteorological seasons: Winter (Dec–Feb), Summer (Mar–May), Monsoon (Jun–Sep), Post-monsoon (Oct–Nov).
Winter
AQI 160Summer
AQI 159Monsoon
AQI 60Post-monsoon
AQI 87Climograph — monthly averages and Poor+ days
Bars show the long-run AQI average per month. The overlay line counts days in Poor, Very Poor or Severe bands.
Year × month heatmap
One cell per year-month combination.
Each cell = monthly average AQI for that year-month combination. Row averages on the right, column averages at the bottom.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | — | — | — | — | — | — | — | — | — | — | 133 | 149 | 147 |
| 2023 | 197 | 192 | 225 | 178 | 115 | 106 | 45 | 77 | 57 | 87 | 123 | 139 | 129 |
| 2024 | 164 | 154 | 138 | 197 | 98 | 74 | 35 | 45 | 39 | 47 | 87 | 112 | 98 |
| Avg | 182 | 173 | 186 | 186 | 106 | 93 | 40 | 63 | 48 | 66 | 108 | 136 | — |
Winter in Nayāgarh
Winter (Dec–Jan–Feb) in Nayāgarh averages AQI 160 across 190 measured days — Moderate on the NAQI scale. 0.5% of those days fall in Very Poor or Severe; 11.1% are Good or Satisfactory. Year-on-year, winter improved by 17% in the most recent comparison. Winter in Nayāgarh is not the headline season, but shallow morning inversions can still produce short spikes. Nayāgarh's cleanest months lie elsewhere in the calendar, so the winter response is less about evacuation than about protecting sensitive groups on the worst individual days.
Diwali, stubble burning and the monsoon
Three India-specific signatures that shape the seasonal curve.
Diwali week impact
The 7-day window around Diwali averages AQI 80 (Satisfactory), versus 67 (Satisfactory) for the rest of October. 11 sampled days across the CPCB record.
Stubble-burning window (Oct 15 – Nov 15)
In-window severe-day share 0% vs 0% outside the window. The difference is a direct signal of upwind crop-residue transport.
Monsoon cleansing (Jul 15 – Sep 15)
Core monsoon window averages AQI 49 (Good), compared with an annual mean of 116.
Summer
Summer (Mar–Apr–May) in Nayāgarh averages AQI 159 across 146 measured days — Moderate on the NAQI scale. 4.1% of those days fall in Very Poor or Severe; 30.1% are Good or Satisfactory. Year-on-year, summer improved by 20.2% in the most recent comparison. Summer air in Nayāgarh is shaped by a very different mix of forces. Rising temperatures drive deeper vertical mixing which dilutes local emissions, but pre-monsoon dust storms, wildfires and heat-accelerated ozone formation can all push AQI higher on individual days. Nayāgarh's summer mean of 159 sits in the Moderate-to-Poor range, indicating that dust and gaseous precursors dominate the seasonal profile rather than the winter particulate peak common to north Indian cities.
Monsoon
Monsoon (Jun–Jul–Aug–Sep) in Nayāgarh averages AQI 60 across 203 measured days — Satisfactory on the NAQI scale. 0% of those days fall in Very Poor or Severe; 87.2% are Good or Satisfactory. Year-on-year, monsoon improved by 34% in the most recent comparison. The Jul 15 – Sep 15 core monsoon window averages AQI 49, a 57.8% improvement on the annual mean of 116. Rain scrubs particulates out by wet deposition, and the deeper monsoon boundary layer disperses what remains vertically. Short-lived rebounds can happen between spells of rain, but the overall pattern is strongly favourable for outdoor activity. For anyone with asthma or heart conditions, monsoon is the easy-breathing stretch of the year in Nayāgarh.
Post-monsoon
Post-monsoon (Oct–Nov) in Nayāgarh averages AQI 87 across 111 measured days — Satisfactory on the NAQI scale. 0% of those days fall in Very Poor or Severe; 59.5% are Good or Satisfactory. Year-on-year, post-monsoon improved by 37.9% in the most recent comparison. Diwali and the three days either side of it average AQI 80 — 1.2× the normal October baseline of AQI 67 for Nayāgarh, a spike of 13 points. Post-monsoon in Nayāgarh is the handoff from clean monsoon air to the winter peak, and the transition is rarely gentle.
Month-by-month trajectories
How each month has moved across the 3-year CPCB record.
First year vs latest year
Annual and per-season comparison.
Across the 3-year CPCB record Nayāgarh is improving overall — AQI moved from 146 in 2022 to 98 in 2024, a -32.9% change. No month shows a material worsening of 10% or more. No month shows a material improvement of 10% or more. Because Nayāgarh's seasonal shape is flat year-round, policy action that targets the April peak buys disproportionate relief — most city-wide annual averages are dragged upwards by the worst two or three months.
Daily calendar heatmap
Every measured day for the last 3 years. Expand for the full 3-year archive.
Month-by-month deep dive
Tap any month to expand.
Jan2023–2024Latest AQI 164-17%
Jan in Nayāgarh averages AQI 164 (Moderate) in the most recent year, having moved from 197 in 2023. Direction: improving (-16.8%).
Feb2023–2024Latest AQI 154-20%
Feb in Nayāgarh averages AQI 154 (Moderate) in the most recent year, having moved from 192 in 2023. Direction: improving (-19.8%).
Mar2023–2024Latest AQI 138-39%
Mar in Nayāgarh averages AQI 138 (Moderate) in the most recent year, having moved from 225 in 2023. Direction: improving (-38.7%).
Apr2023–2024Latest AQI 197+11%
Apr in Nayāgarh averages AQI 197 (Moderate) in the most recent year, having moved from 178 in 2023. Direction: worsening (+10.7%).
May2023–2024Latest AQI 98-15%
May in Nayāgarh averages AQI 98 (Satisfactory) in the most recent year, having moved from 115 in 2023. Direction: improving (-14.8%).
Jun2023–2024Latest AQI 74-30%
Jun in Nayāgarh averages AQI 74 (Satisfactory) in the most recent year, having moved from 106 in 2023. Direction: improving (-30.2%).
Jul2023–2024Latest AQI 35-22%
Jul in Nayāgarh averages AQI 35 (Good) in the most recent year, having moved from 45 in 2023. Direction: improving (-22.2%).
Aug2023–2024Latest AQI 45-42%
Aug in Nayāgarh averages AQI 45 (Good) in the most recent year, having moved from 77 in 2023. Direction: improving (-41.6%).
Sep2023–2024Latest AQI 39-32%
Sep in Nayāgarh averages AQI 39 (Good) in the most recent year, having moved from 57 in 2023. Direction: improving (-31.6%).
Oct2023–2024Latest AQI 47-46%
Oct in Nayāgarh averages AQI 47 (Good) in the most recent year, having moved from 87 in 2023. Direction: improving (-46.0%).
Nov2022–2024Latest AQI 87-35%
Nov in Nayāgarh averages AQI 87 (Satisfactory) in the most recent year, having moved from 133 in 2022. Direction: improving (-34.6%).
Dec2022–2024Latest AQI 112-25%
Dec in Nayāgarh averages AQI 112 (Moderate) in the most recent year, having moved from 149 in 2022. Direction: improving (-24.8%).
Cities with similar (and opposite) seasonal profiles
Ranked by cosine similarity of 12-month AQI signatures across monitored Indian cities.
Similar seasonal profile
Cities whose 12-month AQI signature most closely matches Nayāgarh.
Opposite seasonal profile
Cities whose seasonal signature least resembles Nayāgarh.
What to do with this information
If you are choosing when to visit Nayāgarh or plan outdoor events — marathons, weddings, school sports, outdoor festivals — the CPCB record says July and the two adjacent months are the lowest-risk window. Daily variability still matters; check the live AQI page before committing on any specific date. Sensitive groups should treat April in Nayāgarh as an indoor-air-priority month: close windows on high-AQI evenings, run a purifier with a HEPA filter rated for your room size, and reserve outdoor exercise for clear-weather mornings. On days above AQI 300, even healthy adults benefit from well-fitted N95 or KN95 masks for outdoor commutes.
Frequently asked questions
Which is the most polluted month in Nayāgarh?
April is the most polluted month in Nayāgarh on average, with a long-run AQI of 186 — firmly in the Moderate band. This is drawn from 1 CPCB monitoring stations across 3 years of daily readings. Through April, residents should expect elevated PM2.5 and PM10, reduced visibility on cooler mornings, and strong recommendations from doctors to limit outdoor exertion, wear well-fitted N95 masks, and run indoor purifiers through evening and overnight hours when pollutant accumulation typically peaks.
What is the cleanest month to visit Nayāgarh?
July is the cleanest month of the year in Nayāgarh, averaging AQI 40 in the Good band. The months immediately before and after also tend to sit well below the annual mean of 116, so a visit window centred on July is the safest choice for outdoor sightseeing, marathons, school trips and wedding events. Mornings are usually the crispest time to head out; pollution tends to creep up slightly during the evening commute even in the cleanest months. Always cross-check the day-of live AQI before any high-exertion outdoor plan.
Why does Nayāgarh's air spike in April?
Nayāgarh's profile is relatively flat year-round; the small April reflects modest swings in wind, rainfall and local emissions rather than a dramatic seasonal mechanism.
How bad is Diwali air quality in Nayāgarh?
Across the CPCB record, the week around Diwali in Nayāgarh averages AQI 80 — 1.2× the normal October baseline of AQI 67, a spike of 13 AQI points. Firework particulates combine with a cooler, more stagnant late-October atmosphere to produce some of the worst air-quality days of the entire year. Sensitive groups should treat Diwali eve and the two days after as peak-alert days: stay indoors, close windows by evening, run purifiers on high, and reserve any outdoor celebrations for daytime hours when mixing is strongest.
Does the monsoon actually clean Nayāgarh's air?
Yes — meaningfully. Nayāgarh's core monsoon window (Jul 15 – Sep 15) averages AQI 49, a 57.8% improvement on the annual mean of 116. Rain removes airborne particulates by wet deposition, and the deeper monsoon boundary layer disperses what remains vertically. Across 203 measured monsoon days we see 87.2% in the Good-or-Satisfactory band.
Is Nayāgarh's worst season getting worse or better year-on-year?
Between 2022 and 2024, Nayāgarh's annual average AQI moved from 146 to 98 — a change of -32.9%. In the most recent year-on-year comparison, the winter season specifically improved by 17%. The long-run direction is improving — NCAP policy pressure, cleaner fuels and tighter vehicle standards are showing up.
Which months are safest to visit Nayāgarh?
July is the single best month at AQI 40. Based on the 12-month averages, the three cleanest months in Nayāgarh are July (AQI 40), September (AQI 48), August (AQI 63). These are the safest choices for outdoor itineraries, long walks, open-air concerts and day-trips. Sensitive groups can treat these months as near-normal activity windows but should still check live AQI for the specific date. Avoid planning outdoor-heavy trips in April, when the baseline jumps into Moderate territory.
How does Nayāgarh's seasonal pattern compare to other Indian cities?
Nayāgarh is classified as flat year-round. Based on a 12-month cosine-similarity index computed across all monitored Indian cities, the city whose seasonal signature most closely resembles Nayāgarh's is Gangtok (Sikkim), with its own worst month in March. Cities with similar signatures often respond to similar policy levers — if a neighbouring peer has demonstrated improvements through specific interventions (construction-dust controls, bus electrification, brick-kiln regulation), they are likely candidates for Nayāgarh too. The peer-city panel on this page lists the closest four additional matches.