August is one of the warmer months of the year in Niagara Falls, with average highs near 26.2°C and lows around 16.5°C (mean 21.4°C). It is about average for rainfall, averaging 80 mm of rainfall and 70% relative humidity across the period.
August is one of the warmer months of the year in Niagara Falls. Across 45 years of records, the warmest August in Niagara Falls was 2016 — when the month averaged 24.6°C — while the coldest was 1992 at 17.7°C. Typical August days reach 26.2°C with nights near 16.5°C. The long-term trend is warming, about 0.5°C per decade.
August is about average for rainfall in Niagara Falls, averaging 80 mm of rainfall. The wettest August on record was 2009 with 126 mm, while the driest was 2002 at 43 mm.
Relative humidity in Niagara Falls during August averages 70%. The most humid August was 1992 at 78%, and the least humid was 2025 at 61%.
August receives about 5.2 kWh/m²/day of solar energy in Niagara Falls. The sunniest Augusts were 2002 and 2016 at 5.8 kWh/m²/day, and the cloudiest was 1997 at 4.6.
Average wind speed in Niagara Falls during August is 1.3 m/s. The windiest August was 1986 at 1.5 m/s, while the calmest were 1993, 1996 and 2003 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.6°C | 20.5°C | 21.5°C | 22.1°C | 22.5°C | +1.9°C |
| Avg High | 25.6°C | 25.5°C | 26.3°C | 26.8°C | 27.3°C | +1.7°C |
| Avg Low | 15.7°C | 15.4°C | 16.7°C | 17.3°C | 17.7°C | +2°C |
| Avg Rain | 86 mm | 76 mm | 83 mm | 79 mm | 73 mm | -13 mm |
August temperatures in Niagara Falls have risen by about 1.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 6.3°C (1982) to a record high of 34.5°C (2012).
Rainfall in August is about average for rainfall, averaging 80 mm, with a wettest year of 126 mm.
One of the best times to visit Niagara Falls
August is one of the best times to visit Niagara Falls. Expect days averaging 26.2°C and nights around 16.5°C (mean 21.4°C) — warmer than Niagara Falls's yearly average — with moderate rainfall (80 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 27.4°C | 22.2°C | 17.1°C | 34.1°C | 11.0°C | 53 mm | 61% | 1.2 m/s | 5.3 |
| 2024 | 26.9°C | 22.1°C | 17.3°C | 32.3°C | 12.6°C | 78 mm | 70% | 1.3 m/s | 4.8 |
| 2023 | 25.5°C | 20.9°C | 16.3°C | 29.5°C | 11.4°C | 87 mm | 72% | 1.4 m/s | 5 |
| 2022 | 27.8°C | 23.0°C | 18.2°C | 32.2°C | 14.4°C | 84 mm | 68% | 1.2 m/s | 5.3 |
| 2021 | 28.4°C | 23.9°C | 19.4°C | 32.5°C | 14.3°C | 75 mm | 73% | 1.1 m/s | 5.3 |
| 2020 | 27.8°C | 22.9°C | 18.0°C | 31.7°C | 14.3°C | 64 mm | 68% | 1.4 m/s | 5.6 |
| 2019 | 26.5°C | 21.8°C | 17.2°C | 30.4°C | 13.3°C | 83 mm | 71% | 1.3 m/s | 5.7 |
| 2018 | 27.6°C | 23.3°C | 18.9°C | 31.9°C | 13.9°C | 93 mm | 74% | 1.4 m/s | 4.9 |
| 2017 | 25.4°C | 20.7°C | 15.9°C | 29.8°C | 11.5°C | 78 mm | 71% | 1.4 m/s | 5.1 |
| 2016 🔥 | 29.7°C | 24.6°C | 19.5°C | 33.4°C | 15.0°C | 90 mm | 68% | 1.3 m/s | 5.8 |
| 2015 | 25.9°C | 21.2°C | 16.5°C | 31.5°C | 12.9°C | 78 mm | 70% | 1.4 m/s | 5.2 |
| 2014 | 25.1°C | 20.4°C | 15.7°C | 30.3°C | 12.4°C | 65 mm | 74% | 1.2 m/s | 5.1 |
| 2013 | 25.8°C | 21.0°C | 16.2°C | 29.4°C | 12.7°C | 80 mm | 70% | 1.3 m/s | 5.4 |
| 2012 | 27.7°C | 22.6°C | 17.4°C | 34.5°C | 13.7°C | 48 mm | 64% | 1.3 m/s | 5.4 |
| 2011 | 26.7°C | 22.1°C | 17.5°C | 30.5°C | 13.3°C | 100 mm | 70% | 1.3 m/s | 5.1 |
| 2010 | 27.7°C | 22.8°C | 18.0°C | 32.4°C | 13.1°C | 72 mm | 69% | 1.3 m/s | 5.1 |
| 2009 🌧️ | 25.4°C | 21.3°C | 17.1°C | 31.4°C | 11.2°C | 126 mm | 75% | 1.3 m/s | 5.2 |
| 2008 | 24.6°C | 20.2°C | 15.8°C | 30.0°C | 11.5°C | 92 mm | 72% | 1.3 m/s | 5.5 |
| 2007 | 27.6°C | 22.5°C | 17.4°C | 33.5°C | 11.7°C | 45 mm | 67% | 1.3 m/s | 5.2 |
| 2006 | 25.8°C | 21.4°C | 17.0°C | 31.9°C | 11.5°C | 95 mm | 70% | 1.4 m/s | 5.4 |
| 2005 | 28.4°C | 23.3°C | 18.3°C | 32.3°C | 13.7°C | 120 mm | 65% | 1.3 m/s | 5.1 |
| 2004 | 24.1°C | 20.0°C | 15.9°C | 29.0°C | 10.9°C | 76 mm | 76% | 1.3 m/s | 4.7 |
| 2003 | 26.3°C | 21.5°C | 16.8°C | 29.4°C | 12.5°C | 70 mm | 74% | 1 m/s | 5.3 |
| 2002 | 27.4°C | 21.8°C | 16.2°C | 32.5°C | 12.9°C | 43 mm | 64% | 1.2 m/s | 5.8 |
| 2001 | 27.8°C | 22.3°C | 16.8°C | 33.4°C | 11.6°C | 69 mm | 64% | 1.2 m/s | 5.4 |
| 2000 | 25.1°C | 20.6°C | 16.1°C | 32.0°C | 10.0°C | 94 mm | 73% | 1.4 m/s | 5.1 |
| 1999 | 24.9°C | 19.9°C | 14.9°C | 29.9°C | 9.8°C | 76 mm | 67% | 1.2 m/s | 4.9 |
| 1998 | 27.2°C | 22.4°C | 17.5°C | 31.8°C | 11.3°C | 60 mm | 67% | 1.2 m/s | 5.3 |
| 1997 | 24.7°C | 20.1°C | 15.4°C | 30.3°C | 12.1°C | 76 mm | 70% | 1.3 m/s | 4.6 |
| 1996 | 26.0°C | 20.6°C | 15.2°C | 30.9°C | 11.8°C | 48 mm | 71% | 1 m/s | 5.6 |
| 1995 | 27.8°C | 22.4°C | 16.9°C | 31.2°C | 10.5°C | 53 mm | 67% | 1.1 m/s | 5.1 |
| 1994 | 24.1°C | 19.1°C | 14.1°C | 27.6°C | 10.3°C | 109 mm | 72% | 1.3 m/s | 5.2 |
| 1993 | 26.7°C | 21.4°C | 16.1°C | 31.6°C | 10.3°C | 63 mm | 67% | 1 m/s | 5.6 |
| 1992 ❄️ | 22.4°C | 17.7°C | 13.0°C | 29.0°C | 9.3°C | 120 mm | 78% | 1.3 m/s | 5.1 |
| 1991 | 26.0°C | 20.8°C | 15.7°C | 30.8°C | 11.5°C | 63 mm | 68% | 1.3 m/s | 5.3 |
| 1990 | 25.4°C | 20.4°C | 15.3°C | 29.5°C | 12.2°C | 87 mm | 73% | 1.1 m/s | 5 |
| 1989 | 25.0°C | 19.8°C | 14.5°C | 28.4°C | 9.3°C | 64 mm | 70% | 1.3 m/s | 5 |
| 1988 | 26.7°C | 21.6°C | 16.5°C | 34.3°C | 9.7°C | 78 mm | 67% | 1.3 m/s | 5.2 |
| 1987 | 25.2°C | 20.2°C | 15.2°C | 31.9°C | 10.3°C | 94 mm | 68% | 1.4 m/s | 4.9 |
| 1986 | 24.3°C | 19.7°C | 15.1°C | 28.6°C | 8.1°C | 87 mm | 72% | 1.5 m/s | 5.1 |
| 1985 | 26.0°C | 20.9°C | 15.7°C | 30.8°C | 11.8°C | 69 mm | 65% | 1.3 m/s | 5 |
| 1984 | 26.7°C | 21.9°C | 17.2°C | 29.9°C | 11.4°C | 100 mm | 73% | 1.2 m/s | 5.4 |
| 1983 | 27.1°C | 22.0°C | 17.0°C | 30.4°C | 11.7°C | 113 mm | 70% | 1.2 m/s | — |
| 1982 | 24.1°C | 19.1°C | 14.2°C | 29.6°C | 6.3°C | 82 mm | 67% | 1.4 m/s | — |
| 1981 | 25.3°C | 20.5°C | 15.7°C | 29.5°C | 10.7°C | 90 mm | 72% | 1.2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 26.2°C with lows near 16.5°C (mean 21.4°C), based on 45 years of NASA POWER data.
August averages 80 mm of rainfall in Niagara Falls, about average for rainfall. The wettest on record was 126 mm in 2009.
The hottest August reached 34.5°C in 2012. The coldest dipped to 6.3°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.5°C. Daytime highs moved from 25.8°C to 27.2°C and overnight lows from 16°C to 17.7°C over the same span.
August is one of the warmer months of the year in Niagara Falls and about average for rainfall, so plan for around 26.2°C daytime highs and 16.5°C at night.
Not quite — August is the 11th coolest month in Niagara Falls, averaging 21.4°C.
For August in Niagara Falls, pack light layers you can adjust through the day, with typical highs of 26.2°C and lows of 16.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 70% — moderately humid.
Average wind speed in August is 1.3 m/s. The windiest August on record averaged 1.5 m/s (1986).
The wettest August on record was 2009 with 126 mm. On average, August sees 80 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Niagara Falls behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
