5-day weather forecast Pärnu 21-08-2026
Weather forecast Pärnu Friday, August 21 21.08.2026: patchy rain possible, temperature from 10 °C to 18 °C.
Precipitation probability 60%. Wind up to 4.81 m/s (gusts 10.53 m/s). Air humidity 70–96%, atmospheric pressure 754–756 mm Hg, UV index up to 1.5.
5 days at a glance — tap a day to open it
Sunrise 05:57
Sunset 20:53
Sunset 20:53
First Quarter69% illuminated
Moonrise 18:35 · Moonset 22:40
Moonrise 18:35 · Moonset 22:40
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Partly cloudy | 14 °C | 13% | 54% | 75% | 755 mm Hg | WNW 287° 4.81 (10.53) m/s | 0 |
| 01:00 |  Clear | 12 °C | 10% | 0% | 83% | 755 mm Hg | W 274° 3.39 (9.11) m/s | 0 |
| 02:00 |  Mist | 10 °C | 20% | 0% | 96% | 755 mm Hg | WSW 258° 2.39 (6.33) m/s | 0 |
| 03:00 | Mist | 10 °C | 20% | 2% | 96% | 755 mm Hg | W 259° 1.81 (2.14) m/s | 0 |
| 04:00 | Mist | 11 °C | 20% | 5% | 96% | 755 mm Hg | SW 233° 1.31 (1.5) m/s | 0 |
| 05:00 | Mist | 11 °C | 20% | 5% | 95% | 755 mm Hg | SSW 205° 1.39 (1.72) m/s | 0 |
| 06:00 |  Mist | 11 °C | 25% | 43% | 95% | 755 mm Hg | S 184° 2 (2.42) m/s | 0 |
| 07:00 |  Overcast | 13 °C | 32% | 100% | 92% | 755 mm Hg | SSW 192° 2.19 (5.92) m/s | 0.1 |
| 08:00 | Overcast | 15 °C | 24% | 90% | 85% | 755 mm Hg | S 174° 2.61 (6.11) m/s | 0.4 |
| 09:00 | Overcast | 16 °C | 20% | 93% | 76% | 755 mm Hg | S 181° 4.19 (6.31) m/s | 0.9 |
| 10:00 | Overcast | 16 °C | 19% | 98% | 73% | 755 mm Hg | S 176° 4.19 (6) m/s | 1.4 |
| 11:00 |  Patchy rain possible | 16 °C | 19% (0.01 mm/hr) | 100% | 70% | 755 mm Hg | SSE 168° 3 (5) m/s | 1 |
| 12:00 | Patchy rain possible | 15 °C | 24% (0.03 mm/hr) | 100% | 77% | 755 mm Hg | SSE 167° 1.39 (3.81) m/s | 0.6 |
| 13:00 |  Light rain shower | 16 °C | 36% (0.18 mm/hr) | 100% | 78% | 755 mm Hg | SSE 167° 1.39 (4.92) m/s | 0.4 |
| 14:00 |  Thundery outbreaks possible | 16 °C | 32% (0.08 mm/hr) | 98% | 82% | 754 mm Hg | SSW 195° 2.39 (6.92) m/s | 0.3 |
| 15:00 | Patchy rain possible | 16 °C | 56% (0.62 mm/hr) | 71% | 88% | 754 mm Hg | SW 214° 3.5 (7.83) m/s | 0.7 |
| 16:00 | Patchy rain possible | 18 °C | 60% (0.74 mm/hr) | 79% | 86% | 754 mm Hg | WSW 246° 4.5 (8.03) m/s | 1.1 |
| 17:00 | Patchy rain possible | 18 °C | 50% (0.47 mm/hr) | 83% | 82% | 754 mm Hg | W 264° 4.69 (8.22) m/s | 1.5 |
| 18:00 | Patchy rain possible | 17 °C | 20% (0.01 mm/hr) | 81% | 79% | 755 mm Hg | W 279° 4.39 (8.19) m/s | 0.8 |
| 19:00 | Patchy rain possible | 16 °C | 33% (0.25 mm/hr) | 71% | 80% | 755 mm Hg | WNW 285° 3.61 (7.92) m/s | 0.3 |
| 20:00 |  Sunny | 15 °C | 12% | 2% | 86% | 755 mm Hg | WNW 291° 2.19 (4.83) m/s | 0 |
| 21:00 |  Patchy rain possible | 13 °C | 43% (0.17 mm/hr) | 84% | 95% | 755 mm Hg | NW 308° 1.31 (1.61) m/s | 0 |
| 22:00 | Mist | 12 °C | 21% | 15% | 96% | 756 mm Hg | W 273° 0.69 (0.92) m/s | 0 |
| 23:00 | Mist | 12 °C | 22% | 17% | 96% | 756 mm Hg | SW 232° 1.39 (1.89) 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.