Air readings trend near the moderate threshold
Real-time data compiled by IQAir indicate that Saint-Jerome’s PM2.5 concentration is presently 2.4 times the World Health Organization’s annual guideline value. The site’s hourly and daily snapshots show local air quality index (AQI⁺) values hovering from the high-40s into the mid-50s over recent hours, with a posted hourly figure of 57 AQI⁺ (US) flagged as Moderate during the 08:00–09:00 period on July 19, local time.
“PM2.5 concentration is currently 2.4 times the World Health Organization annual PM2.5 guideline value.”
At publication time, the platform listed a current AQI⁺ of 47 for Saint-Jerome. Forecast entries suggest the index will remain in a similar band in the near term, with a posted 36 AQI⁺ on Monday and 56 AQI⁺ on Tuesday. Temperature, wind and humidity figures published alongside those AQI readings point to relatively mild but changeable mid-July conditions.
What the numbers show for the next few days
IQAir’s local page for Saint-Jerome pairs its AQI⁺ outlook with basic weather variables. While the platform does not provide a detailed neighbourhood breakdown for the city—its “cleanest air” locator notes that no specific locations are available—the day-to-day snapshot offers a concise guide to near-term trends:
| Day | AQI⁺ (US) | High / Low | Wind | Humidity |
|---|---|---|---|---|
| Today | 47 | 21°C / 13°C | 25 km/h | 55% |
| Mon | 36 | 24°C / 14°C | 19 km/h | 58% |
| Tue | 56 | 23°C / 16°C | 18 km/h | 85% |
The site’s historic panel for the city shows an AQI⁺ of 57 in the 08:00–09:00 window on July 19, also labelled as Moderate. That range is consistent with the short-term forecast pointing to values in the mid-30s to mid-50s through early week, with Tuesday currently indicated at the upper end of that span.
How Saint-Jerome compares nationally
IQAir also publishes a real-time Canada city ranking by AQI⁺. At the time captured in the feed, the highest readings nationwide included Yellowknife, N.W.T. (194), and several Ontario communities over 100 AQI⁺, such as Burlington (124), Saint John, N.B. (121), and Hamilton (106). Saint-Jerome does not appear in that top-10 list, reflecting comparatively lower readings here than in the country’s highest-ranking locations at that moment.
While rankings can fluctuate over the course of a day, the available snapshot underscores that Saint-Jerome’s recent air quality has been closer to the moderate band than to the severe levels observed elsewhere in Canada during the same period.
What residents can take from the latest data
For local planning, the posted figures point to air that is not among the country’s worst at the moment, yet still elevated enough in fine particulate (PM2.5) to exceed the WHO annual guideline. The forecast suggests incremental variability over the next 48 to 72 hours. Residents tracking conditions hour by hour may find it useful to monitor changes across the day, as readings on the platform have shown movement between the high-40s and mid-50s in a short window.
- Current snapshot: Saint-Jerome around 47 AQI⁺, with recent hourly data peaking near 57 (Moderate).
- PM2.5 noted at 2.4× the WHO annual guideline value, per IQAir.
- Near-term outlook: values generally in the mid-30s to mid-50s through early week.
IQAir’s Saint-Jerome page indicates that detailed sub-city readings are not available, and its “cleanest air” locator lists no specific neighbourhoods at this time. As with all real-time air quality products, figures can shift with wind, humidity and other weather conditions throughout the day.
