5-day weather forecast Prague Sep 18, 2026

20°13° · Overcast

Weather forecast Prague Friday Sep 18, 2026: overcast, temperature from 13 °C to 20 °C.

Precipitation probability 18%. Wind up to 4.11 m/s (gusts 5.33 m/s). Air humidity 38–68%, atmospheric pressure 761–765 mm Hg, UV index up to 3.8.

Sunrise 06:42
Sunset 19:09
First Quarter53% illuminated
Moonrise 15:38 · Moonset 22:34
Chart
Table

Forecast from 13 °C to 20 °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)151514141414131314141618192020202020191918171716
Precipitation (mm/hr)000000000000000000000000

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 (%)1001001001001001001001009790981001001001009910010085679919680
Rain chance (%)1415161717171718161212111010101010109210131412

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)2.52.312.392.52.392.312.312.52.392.812.893.193.393.694.114.113.813.312.392.312.312.1921.5
Wind gust (m/s)4.113.423.53.613.393.313.3144.615.114.924.924.9255.315.335.034.694.613.423.443.533.311.81
Wind direction (°)SSW 200°SSW 201°SSW 200°SSW 200°SSW 200°SSW 197°S 191°SSW 195°S 189°SSW 213°SW 225°WSW 248°WSW 248°WSW 252°WSW 256°WSW 253°WSW 249°WSW 246°SW 235°SW 222°SW 221°SW 227°WSW 238°WSW 244°

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 (%)596164666666686865585247434039383840465256586164

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)762762762762761761762762762762763763763762763762762762763763764764764765

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 Index000000000.20.81.72.73.53.83.42.61.80.80.300000

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)1112.714.415.81514.113.513.815.514.39.56.84.44.24.6555.47.310.713.113.11313.2
PM10 (µg/m³)14.414.415.616.615.614.61414.21614.79.774.74.75.25.65.76.28.211.914.514.514.514.8
Ozone (O₃) (µg/m³)44.53729.8272829282630436075848993959591796351474646
NO₂ (µg/m³)15.217.921.223.921.21918.117.716.413.49.66.44.53.22.51.91.93.89.5172221.919.316.9
SO₂ (µg/m³)1.91.922.11.81.71.71.91.91.71.41.10.90.90.80.80.80.91.31.82.22.32.32.2
CO (µg/m³)265.3240.5214.5200195194199208213213210201180153134129132141158181198205205201

Prague 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.