5-day weather forecast Saint Petersburg 21-05-2026
Weather forecast Saint Petersburg Thursday, May 21 21.05.2026: sunny, temperature from 9 °C to 16 °C.
Precipitation probability 64%. Wind up to 4.11 m/s (gusts 5.69 m/s). Air humidity 55–91%, atmospheric pressure 766–767 mm Hg, UV index up to 5.
Sunrise 04:08
Sunset 21:44
Sunset 21:44
Waxing Crescent24% illuminated
Moonrise 08:19 · Moonset 02:21
Moonrise 08:19 · Moonset 02:21
Chart
Table
Thu, May 21, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Partly cloudy | 9 °C | 0% | 57% | 88% | 766 mm Hg | WNW 285° 3.11 (5.69) m/s | 0 |
| 01:00 |  Overcast | 9 °C | 0% | 90% | 88% | 767 mm Hg | W 270° 1.61 (2.94) m/s | 0 |
| 02:00 |  Cloudy | 9 °C | 0% | 75% | 87% | 767 mm Hg | WNW 284° 2.39 (4.64) m/s | 0 |
| 03:00 | Partly cloudy | 9 °C | 0% | 62% | 88% | 766 mm Hg | WNW 295° 1.89 (3.81) m/s | 0 |
| 04:00 | Cloudy | 9 °C | 0% | 80% | 91% | 767 mm Hg | W 280° 2 (4.19) m/s | 0 |
| 05:00 |  Overcast | 9 °C | 0% | 100% | 89% | 767 mm Hg | WNW 282° 1.81 (3.58) m/s | 0 |
| 06:00 |  Cloudy | 11 °C | 0% | 86% | 85% | 767 mm Hg | WNW 288° 2 (3.47) m/s | 0.2 |
| 07:00 | Cloudy | 11 °C | 0% | 79% | 82% | 767 mm Hg | WNW 300° 2.19 (3.58) m/s | 0.3 |
| 08:00 | Cloudy | 12 °C | 0% | 69% | 78% | 767 mm Hg | WNW 292° 2.39 (3.42) m/s | 1 |
| 09:00 |  Patchy rain possible | 13 °C | 64% (0.02 mm/hr) | 90% | 75% | 767 mm Hg | WNW 282° 2.89 (3.92) m/s | 2 |
| 10:00 |  Light drizzle | 13 °C | 100% (0.19 mm/hr) | 100% | 78% | 767 mm Hg | WNW 282° 2.81 (3.92) m/s | 3 |
| 11:00 | Light drizzle | 11 °C | 100% (0.22 mm/hr) | 100% | 87% | 767 mm Hg | WNW 290° 2 (3.17) m/s | 4 |
| 12:00 | Patchy rain possible | 12 °C | 100% (0.08 mm/hr) | 80% | 87% | 767 mm Hg | WNW 291° 1.89 (2.89) m/s | 4.7 |
| 13:00 | Light drizzle | 13 °C | 100% (0.31 mm/hr) | 88% | 83% | 767 mm Hg | W 275° 1.11 (1.56) m/s | 4.8 |
| 14:00 | Patchy rain possible | 13 °C | 73% (0.01 mm/hr) | 100% | 81% | 767 mm Hg | WNW 284° 0.69 (0.97) m/s | 4.4 |
| 15:00 | Cloudy | 15 °C | 0% | 69% | 70% | 767 mm Hg | WNW 294° 1.81 (2.22) m/s | 3.8 |
| 16:00 |  Partly cloudy | 15 °C | 0% | 46% | 66% | 767 mm Hg | WNW 283° 2.31 (2.92) m/s | 5 |
| 17:00 |  Sunny | 16 °C | 0% | 9% | 59% | 767 mm Hg | WNW 286° 2.69 (3.36) m/s | 5 |
| 18:00 | Sunny | 15 °C | 0% | 2% | 55% | 766 mm Hg | WNW 289° 4.11 (5.44) m/s | 5 |
| 19:00 | Sunny | 14 °C | 0% | 0% | 56% | 767 mm Hg | W 278° 3.31 (5) m/s | 4 |
| 20:00 | Sunny | 13 °C | 0% | 0% | 63% | 767 mm Hg | W 269° 2.11 (3.97) m/s | 4 |
| 21:00 | Sunny | 11 °C | 0% | 0% | 69% | 767 mm Hg | W 274° 2.19 (4.61) m/s | 4 |
| 22:00 |  Clear | 10 °C | 0% | 1% | 72% | 767 mm Hg | W 274° 2.19 (4.61) m/s | 0 |
| 23:00 | Clear | 10 °C | 0% | 1% | 74% | 767 mm Hg | W 274° 2.19 (4.61) m/s | 0 |
Thu, May 21, 2026
Saint 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.