5-day weather forecast Petersburg 18-08-2026
Weather forecast Petersburg Tuesday, August 18 18.08.2026: partly cloudy, temperature from 21 °C to 32 °C.
Precipitation probability 52%. Wind up to 2.81 m/s (gusts 5.14 m/s). Air humidity 44–98%, atmospheric pressure 759–761 mm Hg, UV index up to 8.
5 days at a glance — tap a day to open it
Sunrise 06:28
Sunset 19:58
Sunset 19:58
First Quarter37% illuminated
Moonrise 13:00 · Moonset 23:02
Moonrise 13:00 · Moonset 23:02
Chart
Table
Tue, Aug 18, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Patchy rain possible | 22 °C | 52% (0.35 mm/hr) | 72% | 98% | 761 mm Hg | ESE 103° 0.69 (1.25) m/s | 0 |
| 01:00 |  Fog | 22 °C | 42% | 100% | 97% | 761 mm Hg | ENE 60° 1.11 (2.25) m/s | 0 |
| 02:00 | Fog | 22 °C | 42% | 100% | 97% | 761 mm Hg | N 11° 1.39 (2.53) m/s | 0 |
| 03:00 |  Mist | 22 °C | 25% | 36% | 97% | 760 mm Hg | N 352° 1.39 (2.44) m/s | 0 |
| 04:00 | Fog | 22 °C | 42% | 100% | 97% | 760 mm Hg | NNW 347° 2 (3.78) m/s | 0 |
| 05:00 | Fog | 21 °C | 42% | 100% | 97% | 760 mm Hg | N 357° 1.89 (3.67) m/s | 0 |
| 06:00 | Mist | 21 °C | 24% | 34% | 97% | 761 mm Hg | N 352° 1.81 (3.47) m/s | 0 |
| 07:00 |  Mist | 21 °C | 23% | 32% | 96% | 761 mm Hg | N 359° 1.69 (3.14) m/s | 0.1 |
| 08:00 | Mist | 23 °C | 28% | 57% | 95% | 761 mm Hg | N 355° 1.69 (2.42) m/s | 0.7 |
| 09:00 |  Sunny | 25 °C | 15% | 45% | 82% | 761 mm Hg | WSW 251° 2 (2.61) m/s | 6 |
| 10:00 | Mist | 27 °C | 8% | 33% | 69% | 761 mm Hg | SSE 148° 2.31 (2.81) m/s | 6 |
| 11:00 | Sunny | 28 °C | 4% | 21% | 56% | 761 mm Hg | NE 44° 2.61 (3) m/s | 7 |
| 12:00 |  Partly cloudy | 30 °C | 3% | 26% | 52% | 761 mm Hg | NE 50° 2.31 (2.69) m/s | 7 |
| 13:00 | Sunny | 31 °C | 3% | 31% | 48% | 761 mm Hg | NE 56° 2.11 (2.39) m/s | 8 |
| 14:00 | Partly cloudy | 32 °C | 3% | 35% | 44% | 760 mm Hg | ENE 62° 1.81 (2.08) m/s | 8 |
| 15:00 |  Cloudy | 32 °C | 4% | 48% | 45% | 760 mm Hg | ENE 65° 1.61 (1.81) m/s | 7 |
| 16:00 | Partly cloudy | 32 °C | 6% | 62% | 46% | 759 mm Hg | ENE 69° 1.31 (1.61) m/s | 8 |
| 17:00 | Cloudy | 32 °C | 8% | 75% | 47% | 759 mm Hg | ENE 73° 1.11 (1.36) m/s | 7 |
| 18:00 | Partly cloudy | 30 °C | 8% | 68% | 58% | 759 mm Hg | E 87° 1.69 (2.5) m/s | 7 |
| 19:00 | Cloudy | 28 °C | 10% | 60% | 70% | 759 mm Hg | ESE 102° 2.19 (3.69) m/s | 6 |
| 20:00 |  Partly cloudy | 26 °C | 15% | 53% | 81% | 759 mm Hg | ESE 116° 2.81 (4.89) m/s | 0 |
| 21:00 | Partly cloudy | 25 °C | 15% | 46% | 82% | 759 mm Hg | ESE 120° 2.81 (5) m/s | 0 |
| 22:00 | Partly cloudy | 24 °C | 14% | 39% | 84% | 760 mm Hg | SE 124° 2.81 (5.11) m/s | 0 |
| 23:00 | Partly cloudy | 23 °C | 15% | 32% | 86% | 760 mm Hg | SE 128° 2.81 (5.14) m/s | 0 |
Tue, Aug 18, 2026
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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.