Prévisions météo à 5 jours Niagara Falls 04-09-2026

Prévisions météo Niagara Falls vendredi 4 septembre 04.09.2026 : ensoleillé, température de 18 °C à 25 °C.

Probabilité de précipitations 76%. Vent jusqu'à 2.69 m/s (rafales 4.92 m/s). Humidité de l'air 51–98%, pression atmosphérique 758–761 mm Hg, indice UV jusqu'à 6.7.

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 06:43
Coucher du soleil 19:46
Dernier Quartier39% illuminé
Lever de la lune 23:29 · Coucher de la lune 15:03
Graphique
Tableau

Prévisions de 18 °C à 25 °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)212121201918181818192123242425252524232221212121
Précipitations (mm/h)0.940000000000000000000000.010.01

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 (%)10094000100142165666100100971001006274745100100100
Risque de pluie (%)76371412122812171381141313121212811148242627

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)21.52.111.691.311.891.110.891.390.890.811.52.112.692.611.811.812.392.612.612.191.891.390.89
Rafale de vent (m/s)3.923.924.923.311.393.811.110.923.311.441.191.922.893.813.312.422.312.813.034.114.223.691.611.14
Direction du vent (°)O 270°NO 309°NNO 344°N 3°NNO 338°NO 323°NO 320°NNO 342°NNO 340°N 351°N 354°O 280°ONO 286°O 274°OSO 245°O 271°ONO 286°O 266°OSO 244°SO 227°SO 224°SO 222°SSO 211°OSO 249°

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 (%)989692888788888886776862575452515357627177808384

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)759759759759759760760760761761760761761761760759758759759759759759759759

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 UV000000000.41.22.74.566.75.34.73.11.70.70.20000

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)6.67.78.48.88.68.2887.85.85.65.86.48.210.412.514.415.415.316.318.520.720.318.6
PM10 (µg/m³)6.77.88.58.98.78.2887.85.85.65.96.48.310.412.714.615.515.516.418.720.920.518.7
Ozone (O₃) (µg/m³)534539384042434346525968789010010811511711310495857567
NO₂ (µg/m³)2023.425.324.221.719.618.918.618.11715.614.312.911.610.710.210.211.515.220.22426.127.126.1
SO₂ (µg/m³)3.94.34.64.54.24.14.24.34.75.46.26.97.47.78.18.699.298.58.187.97.4
CO (µg/m³)205215227227230238257280295295286272253230209189173172204252278261221188

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.