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 22%. Wind up to 11 m/s (gusts 13.11 m/s). Air humidity 53–71%, atmospheric pressure 767–770 mm Hg, UV index up to 10.1.
5 days at a glance — tap a day to open it
Sunrise 07:02
Sunset 20:06
Sunset 20:06
First Quarter37% illuminated
Moonrise 13:00 · Moonset 23:46
Moonrise 13:00 · Moonset 23:46
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Patchy rain possible | 15 °C | 19% (0.06 mm/hr) | 100% | 61% | 768 mm Hg | SSE 153° 11 (12.22) m/s | 0 |
| 01:00 | Patchy rain possible | 15 °C | 15% (0.01 mm/hr) | 100% | 60% | 768 mm Hg | SSE 153° 10.5 (11.42) m/s | 0 |
| 02:00 | Patchy rain possible | 15 °C | 17% (0.05 mm/hr) | 96% | 59% | 768 mm Hg | SE 143° 9.61 (10.42) m/s | 0 |
| 03:00 | Patchy rain possible | 15 °C | 16% (0.03 mm/hr) | 100% | 59% | 767 mm Hg | SE 143° 10 (13) m/s | 0 |
| 04:00 | Patchy rain possible | 15 °C | 16% (0.02 mm/hr) | 100% | 58% | 767 mm Hg | SE 146° 8.81 (9.11) m/s | 0 |
| 05:00 |  Overcast | 16 °C | 12% | 99% | 53% | 767 mm Hg | SSE 148° 7.39 (8.72) m/s | 0 |
| 06:00 | Overcast | 16 °C | 13% | 100% | 55% | 767 mm Hg | SE 142° 9.11 (13.11) m/s | 0 |
| 07:00 |  Clear | 16 °C | 3% | 8% | 57% | 768 mm Hg | SE 144° 8.61 (8.64) m/s | 0 |
| 08:00 |  Patchy rain possible | 16 °C | 13% (0.01 mm/hr) | 90% | 58% | 768 mm Hg | SSE 148° 8.5 (8.72) m/s | 0.3 |
| 09:00 |  Overcast | 16 °C | 14% | 99% | 58% | 769 mm Hg | SSE 150° 8.5 (8.72) m/s | 1.4 |
| 10:00 |  Partly cloudy | 16 °C | 5% | 28% | 60% | 769 mm Hg | SSE 152° 8.61 (8.72) m/s | 3.4 |
| 11:00 |  Sunny | 16 °C | 4% | 5% | 61% | 769 mm Hg | SSE 147° 8.69 (8.92) m/s | 6.1 |
| 12:00 | Sunny | 16 °C | 4% | 4% | 62% | 769 mm Hg | SSE 149° 8.19 (8.61) m/s | 8.6 |
| 13:00 | Sunny | 16 °C | 4% | 5% | 61% | 769 mm Hg | SE 146° 8 (8.11) m/s | 10.1 |
| 14:00 | Sunny | 16 °C | 4% | 13% | 61% | 769 mm Hg | SSE 150° 7.69 (8.11) m/s | 10.1 |
| 15:00 | Partly cloudy | 16 °C | 10% | 62% | 63% | 768 mm Hg | SSE 156° 7.39 (7.92) m/s | 8.6 |
| 16:00 | Sunny | 16 °C | 5% | 15% | 64% | 768 mm Hg | SSE 156° 8.31 (12.31) m/s | 6.1 |
| 17:00 | Partly cloudy | 16 °C | 7% | 32% | 65% | 767 mm Hg | SSE 154° 8.19 (8.5) m/s | 3.5 |
| 18:00 | Patchy rain possible | 16 °C | 13% (0.01 mm/hr) | 79% | 65% | 768 mm Hg | SSE 157° 7.81 (8.22) m/s | 1.5 |
| 19:00 | Sunny | 16 °C | 6% | 12% | 66% | 768 mm Hg | SSE 152° 7.89 (8.31) m/s | 0.4 |
| 20:00 | Patchy rain possible | 16 °C | 16% (0.01 mm/hr) | 93% | 67% | 768 mm Hg | SSE 153° 7.89 (8.42) m/s | 0 |
| 21:00 | Patchy rain possible | 16 °C | 18% (0.01 mm/hr) | 100% | 68% | 769 mm Hg | SSE 148° 8.11 (8.39) m/s | 0 |
| 22:00 | Patchy rain possible | 16 °C | 22% (0.04 mm/hr) | 100% | 71% | 770 mm Hg | SE 140° 7.81 (8.42) m/s | 0 |
| 23:00 | Patchy rain possible | 16 °C | 21% (0.04 mm/hr) | 100% | 70% | 770 mm Hg | SE 136° 7.19 (7.83) m/s | 0 |
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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.