5-day weather forecast St. Petersburg 18-08-2026

Weather forecast St. Petersburg tomorrow 18.08.2026: patchy rain possible, temperature from 15 °C to 16 °C.

Precipitation probability 19%. Wind up to 11.89 m/s (gusts 12.5 m/s). Air humidity 53–66%, atmospheric pressure 767–770 mm Hg, UV index up to 10.1.

Sunrise 07:02
Sunset 20:06
First Quarter37% illuminated
Moonrise 13:00 · Moonset 23:46
Chart
Table

Forecast from 15 °C to 16 °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)151516161515151515151616161616161616161616161616
Precipitation (mm/hr)0.010.0100.0100.050000.01000000000.010.010.0100.010

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 (%)10010010010010010010010010010099603637006079708807296
Rain chance (%)1515131415191415151514866444413111551216

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)11.8910.8110.6910.8110.510.119.819.399.319.118.618.1187.697.817.317.397.116.697.116.897.197.317.19
Wind gust (m/s)12.511.9211.9211.3311.0310.6110.3310.039.929.619.228.9288.228.147.367.57.4277.197.117.57.647.53
Wind direction (°)SE 146°SSE 156°SSE 152°SSE 149°SSE 147°SE 142°SE 141°SE 141°SE 140°SE 138°SE 136°SE 140°SE 137°SE 137°SE 135°SE 138°SE 137°SE 138°SE 145°SE 142°SE 142°SE 136°SE 133°SE 126°

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 (%)616053556162595960605956606061626263646465656666

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)768769768768768767767768768769769770770770769769768768768768769770770770

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 Index000000000.31.43.46.18.610.110.18.66.13.51.50.40000

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)6.56.87.17.47.57.2777.17.17.17.27.47.57.77.47.37.87.27.37.67.87.98.2
PM10 (µg/m³)10.410.811.311.611.711.31111.111.111.311.511.511.811.912.311.611.41211.111.311.71212.112.3
Ozone (O₃) (µg/m³)494949505152535455586163636363656870707070707071
NO₂ (µg/m³)1.92.12.22.22.22.12.121.81.40.90.50.40.40.40.40.40.50.70.91.11.31.51.6
SO₂ (µg/m³)0.50.50.50.50.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.4
CO (µg/m³)1111111091051009799104107106104102102103104105106107110113115113108105

St. Petersburg 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.