5-day weather forecast Fairfax 21-08-2026

Weather forecast Fairfax tomorrow 21.08.2026: sunny, temperature from 20 °C to 34 °C.

Precipitation probability 29%. Wind up to 4.69 m/s (gusts 10.19 m/s). Air humidity 35–86%, atmospheric pressure 760–764 mm Hg, UV index up to 7.9.

Sunrise 06:38
Sunset 20:10
First Quarter69% illuminated
Moonrise 16:35 · Moonset 00:25
Chart
Table

Forecast from 20 °C to 34 °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)212222222121212022212326283032343434343231282624
Precipitation (mm/hr)00000000.01000.260.110.0900000000.020.0200

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 (%)1006000008101768586000141400868700
Rain chance (%)237677810241082919171111111111578

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)2.813.114.1933.113.192.192.390.191.52.111.112.1933.113.693.693.54.3144.194.693.613.39
Wind gust (m/s)3.333.7210.034.724.316.112.332.50.331.612.331.53.224.424.925.1954.814.926.118.1110.198.815.72
Wind direction (°)NE 39°S 182°SSW 200°SSE 157°S 172°S 188°SSW 205°SW 234°SSE 147°W 281°WSW 241°NW 312°WNW 285°W 281°W 272°W 279°WNW 292°NW 309°NNW 335°NNW 347°N 3°NNE 16°NNE 18°NNE 16°

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 (%)787472747676828684767158504439363635364353667477

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)763762761761762762762763763763764763763762761761760760760760760761761761

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 Index000000000.51.53.15.16.97.97.76.44.41.61.10.30000

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)5.64.44.14.14.255.25.23.844.555.566.66.97.17.27.376.97.14.94.3
PM10 (µg/m³)6.454.64.54.65.45.65.644.55.15.86.577.788.18.38.487.88.15.54.8
Ozone (O₃) (µg/m³)5251515252504849576879889510110510710710610410093847565
NO₂ (µg/m³)19.717.515.81412.612.212.311.69.36.23.72.41.71.310.911.422.94.367.99.9
SO₂ (µg/m³)1.11.11.31.51.71.71.61.51.20.90.60.50.60.60.70.70.80.80.70.70.70.70.70.7
CO (µg/m³)149143140138137137137138139139138133125120119119122126131140157177187178

Fairfax 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.