Today
Mon, Jun 22
Overcast
21°13°
- Rain chance
- 37%
- Precip
- 0 mm
- Max wind
- 15 km/h
Guelph air quality
Ontario, Canada · Toronto time · 43.55°, -80.26°
Current conditions · 12:00 AM local
Current conditions in Guelph
15°C
Overcast
Feels like 15°C
- Humidity
- 81%
- Wind
- 4 km/h NW
- Gusts
- 8 km/h
- UV index
- 0
- Visibility
- 18 km
Air quality
22
Good
US AQI · European AQI 9
Air quality in Guelph is currently good, with a US AQI of 22 (European AQI 9). The dominant pollutant right now is nitrogen dioxide. Air quality is healthy; no precautions needed. Fine particulate matter (PM2.5) measures 3.4 µg/m³.
Pollutants
- PM2.5
- 3.4 µg/m³
- PM10
- 3.4 µg/m³
- Ozone (O₃)
- 19 µg/m³
- NO₂
- 18.4 µg/m³
- SO₂
- 0.9 µg/m³
- CO
- 171 µg/m³
- Dust
- 0 µg/m³
AQI computed from the CAMS air quality model via Open-Meteo. Bands follow the US EPA scale.
Right now
Guelph is currently seeing overcast, with 15 °C on the thermometer. It feels close to the actual reading at 15 °C. Wind is from the NW at 4 km/h. Humidity stands at 81% with sea-level pressure near 1015 hPa.
At a glance
Today
21° / 13°Overcast · 37% chance of rain
Tomorrow
22° / 10°Overcast
Upcoming · to Sunday
25° / 11°Highs 25°, lows 11°. The most active day looks like Thursday, when rain chances peak at 76%.
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Next 3 days
Today looks like overcast; temperatures run from 13 °C up to 21 °C. Rain chance peaks at 37%. Tomorrow brings overcast with a high of 22 °C and a low of 10 °C. Expect overcast Wednesday, between 11 °C and 22 °C.
Tomorrow
Tue, Jun 23
Overcast
22°10°
- Rain chance
- 0%
- Precip
- 0 mm
- Max wind
- 20 km/h
Wednesday
Wed, Jun 24
Overcast
22°11°
- Rain chance
- 16%
- Precip
- 0 mm
- Max wind
- 15 km/h
Next 48 hours
- 12 AM15°0%4 km/h
- 1 AM14°1%7 km/h
- 2 AM14°1%7 km/h
- 3 AM13°5%5 km/h
- 4 AM13°5%3 km/h
- 5 AM14°6%3 km/h
- 6 AM14°10%5 km/h
- 7 AM14°21%2 km/h
- 8 AM15°33%10 km/h
- 9 AM16°33%11 km/h
- 10 AM16°37%2 km/h
- 11 AM17°21%7 km/h
- 12 PM19°10%11 km/h
- 1 PM20°8%14 km/h
- 2 PM21°3%13 km/h
- 3 PM21°3%12 km/h
- 4 PM21°2%13 km/h
- 5 PM19°2%15 km/h
- 6 PM19°2%13 km/h
- 7 PM18°4%12 km/h
- 8 PM17°6%9 km/h
- 9 PM16°4%6 km/h
- 10 PM15°0%6 km/h
- 11 PM14°0%4 km/h
- 12 AM13°0%2 km/h
- 1 AM12°0%8 km/h
- 2 AM12°0%8 km/h
- 3 AM11°0%10 km/h
- 4 AM11°0%8 km/h
- 5 AM11°0%10 km/h
- 6 AM10°0%9 km/h
- 7 AM12°0%5 km/h
- 8 AM15°0%10 km/h
- 9 AM18°0%10 km/h
- 10 AM19°0%12 km/h
- 11 AM20°0%12 km/h
- 12 PM21°0%15 km/h
- 1 PM21°0%17 km/h
- 2 PM22°0%18 km/h
- 3 PM22°0%18 km/h
- 4 PM22°0%20 km/h
- 5 PM21°0%20 km/h
- 6 PM21°0%18 km/h
- 7 PM20°0%16 km/h
- 8 PM17°0%14 km/h
- 9 PM14°0%13 km/h
- 10 PM13°0%14 km/h
- 11 PM12°0%14 km/h
In depth
Guelph starts the period under overcast, with the mercury at 15 °C and a feels-like of 15 °C. Today's forecast calls for overcast, topping out near 21 °C before falling back to 13 °C overnight. Winds blow mainly from the ENE around 15 km/h, with gusts up to 23 km/h. A warming trend takes daytime highs from 20 to 25 °C over the coming week. Rain is in the picture on Thursday, with roughly 19 mm expected in total across the week. Tomorrow brings overcast with a high of 22 °C and a 0% chance of precipitation. The UV index reaches 7 today, so sun protection is sensible during the middle of the day. Sunrise comes at 05:40 and sunset at 21:05, giving 15.4 hours of daylight. Current humidity sits at 81% with pressure near 1015 hPa. Looking further out, Friday shows overcast with a high around 20 °C, while Sunday ends the week at 25 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.
Sun & UV
- Sunrise
- 5:40 AM
- Sunset
- 9:05 PM
- Daylight
- 15h 26m
- Max UV
- 7 High
Wind
- Wind
- 4 km/h
- Gusts
- 8 km/h
- Direction
- NW (315°)
Farming weather
Soil temperatures today read surface 12.1 °C, 6 cm 15.6 °C, 18 cm 17.2 °C, 54 cm 15 °C. Soil moisture sits at 0-1 cm at 0.22 m³/m³, 3-9 cm at 0.22 m³/m³, 27-81 cm at 0.2 m³/m³. For wheat, the root-zone reading is within the ideal 0.2-0.35 m³/m³ band. ET0 of 26 mm modestly outpaces the 19 mm of forecast rain; light supplemental irrigation may help. A suitable spraying window opens around 06:00 on 2026-06-22, with winds at or below 15 km/h and no rain expected. Projected growing degree days over the next week: wheat 86, maize 48.
- Topsoil moisture
- 0.223 m³/m³
- Soil temp
- 14°C
- ET₀ today
- 3.9 mm
- Spray window
- ~5:00
- Rain (next 7d)
- 19.2 mm
- Wind
- 4 km/h
- Humidity
- 81%
Advisory summary
No weather alert thresholds are crossed for Guelph in the current forecast (derived from forecast data, not official warnings). Conditions may still change — check back for updates.
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All data for Guelph
| Variable | Value |
|---|---|
| City | Guelph, Ontario, Canada |
| Coordinates | 43.54594, -80.25599 |
| Elevation | 335 m |
| Timezone | America/Toronto |
| Population | 143,740 |
| Observed at (local) | 12:00 AM |
| Temperature (2 m) | 15°C |
| Apparent temperature | 15°C |
| Relative humidity (2 m) | 81% |
| Dew point (2 m) | 12°C |
| Precipitation (last hour) | 0 mm |
| Rain | 0 mm |
| Showers | 0 mm |
| Snowfall | 0 cm |
| Weather code (WMO) | 3 |
| Cloud cover | 100% |
| Surface pressure | 976 hPa |
| Sea-level pressure | 1015 hPa |
| Wind speed (10 m) | 4 km/h |
| Wind gusts (10 m) | 8 km/h |
| Wind direction (10 m) | 315° (NW) |
| Visibility | 18 km |
| UV index | 0 |
| Day / night | Night |
| Today max / min | 21°C / 13°C |
| Today feels-like max / min | 22°C / 13°C |
| Today precipitation sum | 0 mm |
| Today rain sum | 0 mm |
| Today snowfall sum | 0 cm |
| Today max precip probability | 37% |
| Today max wind / gusts | 15 km/h / 23 km/h |
| Dominant wind direction | 67° (ENE) |
| Sunrise / sunset | 5:40 AM / 9:05 PM |
| Daylight duration | 15h 26m |
| Sunshine duration | 7h 00m |
| Max UV index | 7 |
| Reference evapotranspiration (ET₀) | 3.9 mm |
| Topsoil moisture (0–1 cm) | 0.223 m³/m³ |
| Surface soil temperature | 14°C |
| US AQI | 22 |
| European AQI | 9 |
| PM2.5 | 3.4 µg/m³ |
| PM10 | 3.4 µg/m³ |
| Ozone (O₃) | 19 µg/m³ |
| Nitrogen dioxide (NO₂) | 18.4 µg/m³ |
| Sulphur dioxide (SO₂) | 0.9 µg/m³ |
| Carbon monoxide (CO) | 171 µg/m³ |
| Dust | 0 µg/m³ |
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<iframe src="https://weathertomorrow.cloud/embed/city/ca/ontario/guelph" width="320" height="180" frameborder="0" title="Guelph weather" loading="lazy"></iframe>Frequently asked questions
Will it rain in Guelph tomorrow?
Rain is unlikely in Guelph tomorrow; the precipitation chance stays around 0%.
What is the temperature in Guelph today?
Today Guelph sees overcast with a high of 21 °C and a low of 13 °C.
How hot will it be in Guelph tomorrow?
Tomorrow's high in Guelph is forecast at 22 °C with overcast.
Is it windy in Guelph today?
No, not especially; gusts only reach up to 23 km/h today.
What is the UV index in Guelph today?
The UV index peaks at 7 today, which is high.
What time is sunrise and sunset in Guelph today?
The sun rises at 05:40 and sets at 21:05 local time.
Is the air quality in Guelph good today?
Air quality is good right now, with a US AQI reading of 22.