5-day weather forecast Niagara Falls 21-08-2026
Weather forecast Niagara Falls Friday, August 21 21.08.2026: cloudy, temperature from 7 °C to 8 °C.
Precipitation probability 20%. Wind up to 11 m/s (gusts 11.42 m/s). Air humidity 60–71%, atmospheric pressure 774–776 mm Hg, UV index up to 3.
5 days at a glance — tap a day to open it
Sunrise 06:28
Sunset 20:10
Sunset 20:10
First Quarter69% illuminated
Moonrise 16:39 · Moonset 00:06
Moonrise 16:39 · Moonset 00:06
Chart
Table
Fri, Aug 21, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 8 °C | 15% | 100% | 60% | 774 mm Hg | SSE 159° 10.19 (11.11) m/s | 0 |
| 01:00 |  Clear | 7 °C | 4% | 2% | 63% | 774 mm Hg | SSE 159° 11 (11.42) m/s | 0 |
| 02:00 | Overcast | 8 °C | 18% | 100% | 67% | 776 mm Hg | SSE 156° 10.11 (10.69) m/s | 0 |
| 03:00 |  Cloudy | 8 °C | 9% | 63% | 61% | 775 mm Hg | SSE 158° 10.5 (11.31) m/s | 0 |
| 04:00 | Cloudy | 7 °C | 11% | 71% | 64% | 775 mm Hg | SSE 161° 10 (10.5) m/s | 0 |
| 05:00 | Overcast | 8 °C | 18% | 96% | 68% | 776 mm Hg | SSE 155° 9.39 (9.81) m/s | 0 |
| 06:00 | Overcast | 7 °C | 17% | 100% | 66% | 776 mm Hg | SSE 157° 9.61 (10.14) m/s | 0 |
| 07:00 |  Cloudy | 7 °C | 14% | 78% | 68% | 775 mm Hg | SSE 151° 10.31 (11.14) m/s | 0 |
| 08:00 |  Patchy rain possible | 8 °C | 20% (0.02 mm/hr) | 100% | 68% | 776 mm Hg | SSE 150° 9.31 (9.53) m/s | 0.5 |
| 09:00 |  Overcast | 8 °C | 18% | 100% | 68% | 776 mm Hg | SE 146° 9.61 (10.11) m/s | 2 |
| 10:00 |  Sunny | 8 °C | 6% | 5% | 69% | 776 mm Hg | SE 143° 10.11 (10.61) m/s | 3 |
| 11:00 | Cloudy | 8 °C | 16% | 85% | 70% | 776 mm Hg | SSE 154° 8.89 (9.5) m/s | 2 |
| 12:00 |  Partly cloudy | 8 °C | 8% | 26% | 69% | 776 mm Hg | SE 144° 8.61 (9) m/s | 3 |
| 13:00 | Cloudy | 8 °C | 14% | 79% | 68% | 776 mm Hg | SSE 147° 8.19 (8.64) m/s | 2 |
| 14:00 | Overcast | 8 °C | 18% | 98% | 69% | 776 mm Hg | SSE 154° 8.89 (9.69) m/s | 2 |
| 15:00 | Sunny | 8 °C | 13% | 68% | 70% | 776 mm Hg | SSE 155° 9 (9.69) m/s | 3 |
| 16:00 | Overcast | 8 °C | 9% | 38% | 70% | 776 mm Hg | SSE 156° 9 (9.61) m/s | 2 |
| 17:00 | Sunny | 8 °C | 7% | 8% | 70% | 776 mm Hg | SSE 156° 9.11 (9.61) m/s | 3 |
| 18:00 | Cloudy | 8 °C | 8% | 28% | 70% | 775 mm Hg | SSE 156° 9 (9.39) m/s | 2 |
| 19:00 | Sunny | 8 °C | 10% | 47% | 70% | 775 mm Hg | SSE 155° 8.81 (9.31) m/s | 3 |
| 20:00 | Cloudy | 8 °C | 13% | 66% | 70% | 775 mm Hg | SSE 155° 8.69 (9.11) m/s | 2 |
| 21:00 |  Partly cloudy | 7 °C | 13% | 65% | 71% | 775 mm Hg | SSE 155° 8.61 (9) m/s | 0 |
| 22:00 | Cloudy | 7 °C | 12% | 63% | 71% | 775 mm Hg | SSE 155° 8.61 (9) m/s | 0 |
| 23:00 | Partly cloudy | 7 °C | 12% | 61% | 71% | 774 mm Hg | SSE 156° 8.5 (8.92) m/s | 0 |
Fri, Aug 21, 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.