5-day weather forecast Niagara 18-08-2026

Weather forecast Niagara Tuesday, August 18 18.08.2026: light rain shower, temperature from 15 °C to 24 °C.

Precipitation probability 95%. Wind up to 5 m/s (gusts 7.94 m/s). Air humidity 54–99%, atmospheric pressure 755–759 mm Hg, UV index up to 5.

Sunrise 05:55
Sunset 19:55
First Quarter37% illuminated
Moonrise 13:10 · Moonset 22:17
Chart
Table

Forecast from 15 °C to 24 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)202020181616161718202124242324212018161619171516
Precipitation (mm/hr)0000.080.780.580.090.210.120.0100000.212.3418.040.410.30.50.740.6801.36

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)18231282786010074100100100737064100100100100100695190100100
Rain chance (%)355246758524454332614121436829561555859694280

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)2.893.112.892.192.3932.52.612.693.393.693.313.51.892.892.6153.894.53.6132.611.613.31
Wind gust (m/s)6.086.56.084.615.036.314.784.313.724.224.584.114.362.583.424.427.946.587.55.925.364.2536.03
Wind direction (°)SW 224°WSW 240°SW 232°SW 232°SW 226°SW 226°SW 216°SW 215°SSW 205°SW 228°WSW 252°WSW 252°WSW 252°WSW 242°SW 233°WSW 250°WNW 286°NW 310°NW 318°WNW 303°NE 47°ENE 67°NW 305°NE 37°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)545966769798989897948471697568929895969796999898

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)759759758758758758758758758758757757757756756755755756756756756757757757

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index00000000.24455555544440000

Air quality & pollen

Air quality
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
PM2.5 (µg/m³)3.93.93.632.62.62.62.62.42.42.52.93.133.12.92.82.83.13.53.83.63.53.9
PM10 (µg/m³)43.93.63.12.72.62.72.62.42.42.62.93.23.13.232.82.93.23.53.93.73.63.9
Ozone (O₃) (µg/m³)504851586366677075808590949696949289858281807875
NO₂ (µg/m³)4.94.84.23.22.52.42.52.52.11.61.20.90.70.60.60.60.81.21.72.12.22.12.33
SO₂ (µg/m³)0.20.20.20.20.30.40.60.70.70.60.50.50.40.40.30.30.20.20.20.20.20.10.10.1
CO (µg/m³)173180166142124121126130132135136135133133134137142152163175.8183187.3194199

Niagara on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.