Prévisions météo à 5 jours Niagara Falls 03-09-2026

Prévisions météo Niagara Falls demain 03.09.2026 : pluie éparse possible, température de 21 °C à 27 °C.

Probabilité de précipitations 91%. Vent jusqu'à 3.89 m/s (rafales 9.5 m/s). Humidité de l'air 61–99%, pression atmosphérique 758–761 mm Hg, indice UV jusqu'à 7.

Alertes météo

Masquer les alertes
Moderate2 sept., 04:062 sept., 20:06Traduire avec Google
yellow warning - heat - in effect

heat

A heat event continues today. What: Maximum temperatures of 30 to 32 degrees Celsius. Minimum temperatures of 20 to 23 degrees Celsius. Maximum humidex values near 40. When: Continuing through today, possibly lasting into Thursday for extreme southwestern Ontario. Additional information: The heat event may continue into Thursday for Windsor and Essex County, however, confidence is low. ### For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.html Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on social media using #ONStorm.
Take action to protect yourself and others – extreme heat can affect everyone’s health. Determine if you or others around you are at greater risk of heat illness. Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day. Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water. Heat stroke is a medical emergency! Call 9-1-1 or your emergency health provider if you, or someone around you, is showing signs of heat stroke which can include red and hot skin, dizziness, nausea, confusion and change in consciousness. While you wait for medical attention, try to cool the person by moving them to a cool place, removing extra clothing, applying cold water or ice packs around the body. Drink water often and before you feel thirsty to replace fluids. Close blinds, or shades and open windows if outside is cooler than inside. Turn on air conditioning, use a fan, or move to a cooler area of your living space. If your living space is hot, move to a cool public space such as a cooling centre, community centre, library or shaded park. Follow the advice of your region’s public health authority. Plan and schedule outdoor activities during the coolest parts of the day. Limit direct exposure to the sun and heat. Wear lightweight, light-coloured, loose-fitting clothing and a wide-brimmed hat. Never leave people, especially children, or pets inside a parked vehicle. Check the vehicle before locking to make sure no one is left behind.
Moderate1 sept., 20:292 sept., 12:29Traduire avec Google
yellow advisory - fog - in effect

fog

Near-zero visibility in fog is expected. Visibility along the shore of Lake Ontario is reduced in dense fog. The visibility should improve Wednesday morning as the fog dissipates. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on social media using #ONStorm.
Be prepared for areas of near-zero visibility and allow extra time to reach your destination.
Moderate2 sept., 04:072 sept., 12:01Traduire avec Google
yellow advisory - fog - in effect

fog

Near-zero visibility in fog is expected over some areas. Visibility should improve this morning as the fog dissipates. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on social media using #ONStorm.
Be prepared for areas of near-zero visibility and allow extra time to reach your destination.
Moderate2 sept., 06:452 sept., 12:01Traduire avec Google
yellow advisory - fog - in effect

fog

Near-zero visibility in fog is expected over some areas. Visibility should improve this morning as the fog dissipates. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on social media using #ONStorm.
Be prepared for areas of near-zero visibility and allow extra time to reach your destination.
Les 5 jours en un coup d'œil — appuyez sur un jour pour l'ouvrir
Lever du soleil 06:42
Coucher du soleil 19:48
Dernier Quartier50% illuminé
Lever de la lune 22:40 · Coucher de la lune 13:52
Graphique
Tableau

Prévisions de 21 °C à 27 °C et précipitations

Température & Précipitations
Heure00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Température (°C)212222222221212121222324262727272725242323232221
Précipitations (mm/h)4.760.840.1600000000000.0100.010.080.1100.040.0501.050.75

Couverture nuageuse et probabilité de précipitations

Couverture nuageuse & Risque de pluie
Heure00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Couverture nuageuse (%)1001007610010010010010010010017691001005688558410094100100100100
Risque de pluie (%)91744143434343434230111316178131726232834317772

Vitesse et direction du vent

Vent & Rafale de vent
Heure00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Vent (m/s)3.893.3132.111.61222.111.892.311.692.112.813.1933.113.53.813.192.112.391.813.113
Rafale de vent (m/s)8.539.57.4242.425.223.6155.034.533.223.614.424.924.815.424.815.55.424.615.725.037.55.92
Direction du vent (°)SE 143°S 190°SO 222°SO 222°OSO 249°ONO 297°O 278°ONO 295°ONO 285°ONO 302°O 277°O 263°OSO 251°OSO 255°OSO 256°OSO 251°SO 231°SO 221°SO 220°SO 219°SO 228°OSO 238°OSO 244°SO 226°

Humidité de l'air

Humidité
Heure00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidité (%)979798989999999997918372676462616575798489929798

Pression atmosphérique

Pression
Heure00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pression (mm Hg)759758758758759759759760760761761761761760760760759760759758759760760759

Indice ultraviolet

Indice UV
Heure00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Indice UV000000000.41.22.74.66.176.45.33.71.70.50.10000

Qualité de l'air et pollen

Qualité de l'air
Heure00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
PM2.5 (µg/m³)77.37.68.59.310.21111.21110.19.49.39.210.110.411.211.811.29.78.36.55.65.45.5
PM10 (µg/m³)7.17.47.78.69.410.311.111.411.110.29.59.59.310.210.511.311.911.49.88.56.75.85.55.6
Ozone (O₃) (µg/m³)9592878173665850495976911041151231281291251139682736761
NO₂ (µg/m³)11.711.812.112.613.314.115.416.917.215.512.6107.75.74.64.96.18.111.315.21818.317.417.5
SO₂ (µg/m³)2.933.23.53.73.93.83.63.53.53.63.63.22.72.42.42.72.933.23.33.33.43.5
CO (µg/m³)172159148139133132140153163163160170204252298330359405505621662557376241

Niagara Falls sur la carte

Sources de données et méthodologie

Nos prévisions météo sont alimentées par un fournisseur professionnel de données météorologiques qui agrège les données des services météorologiques nationaux, des observations satellites, des réseaux radar et de plus de 80 000 stations météorologiques dans le monde. Les données de prévision sont mises à jour plusieurs fois par jour. Nous convertissons les données brutes en résumés clairs — vitesse du vent en m/s, pression en mm Hg — afin que vous puissiez planifier votre journée en toute confiance.