August is one of the warmer months of the year in Grand Falls, with average highs near 21.2°C and lows around 10.9°C (mean 16.1°C). It is a relatively wet time of year, averaging 100 mm of rainfall and 84% relative humidity across the period.
August is one of the warmer months of the year in Grand Falls. Across 45 years of records, the warmest August in Grand Falls was 2022 — when the month averaged 18.6°C — while the coldest was 1983 at 13.9°C. Typical August days reach 21.2°C with nights near 10.9°C. The long-term trend is warming, about 0.4°C per decade.
August is a relatively wet time of year in Grand Falls, averaging 100 mm of rainfall. The wettest August on record was 1983 with 167 mm, while the driest was 1996 at 37 mm.
Relative humidity in Grand Falls during August averages 84%. The most humid August was 2014 at 89%, and the least humid was 1987 at 78%.
August receives about 4.4 kWh/m²/day of solar energy in Grand Falls. The sunniest August was 1996 at 5.1 kWh/m²/day, and the cloudiest was 2008 at 3.6.
Average wind speed in Grand Falls during August is 0.1 m/s. The windiest Augusts were 2023, 2024 and 2025, among others at 0.1 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.4°C | 15.6°C | 15.9°C | 16.6°C | 16.8°C | +1.4°C |
| Avg High | 20.7°C | 20.8°C | 21.1°C | 21.5°C | 22.1°C | +1.4°C |
| Avg Low | 10.2°C | 10.4°C | 10.8°C | 11.6°C | 11.5°C | +1.3°C |
| Avg Rain | 91 mm | 106 mm | 117 mm | 96 mm | 82 mm | -9 mm |
August temperatures in Grand Falls have risen by about 1.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 1.5°C (2002) to a record high of 30.2°C (2025).
Rainfall in August is a relatively wet time of year, averaging 100 mm, with a wettest year of 167 mm.
One of the best times to visit Grand Falls
August is one of the best times to visit Grand Falls. Expect days averaging 21.2°C and nights around 10.9°C (mean 16.1°C) — warmer than Grand Falls's yearly average — with higher rainfall (100 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 | 21.2°C | 15.9°C | 10.5°C | 30.2°C | 5.5°C | 80 mm | 83% | 0.1 m/s | 5 |
| 2024 | 22.3°C | 17.1°C | 11.9°C | 28.4°C | 6.0°C | 80 mm | 85% | 0.1 m/s | 4.5 |
| 2023 | 20.7°C | 15.9°C | 11.2°C | 26.5°C | 7.1°C | 121 mm | 86% | 0.1 m/s | 4.1 |
| 2022 🔥 | 23.7°C | 18.6°C | 13.4°C | 28.4°C | 8.6°C | 74 mm | 84% | 0.1 m/s | 4.6 |
| 2021 | 22.6°C | 17.0°C | 11.5°C | 30.0°C | 6.6°C | 69 mm | 83% | 0.1 m/s | 4.5 |
| 2020 | 21.8°C | 16.2°C | 10.7°C | 27.0°C | 5.3°C | 70 mm | 83% | 0.1 m/s | 4.9 |
| 2019 | 21.9°C | 16.8°C | 11.8°C | 28.0°C | 5.5°C | 52 mm | 85% | 0.1 m/s | 4.5 |
| 2018 | 23.0°C | 17.9°C | 12.8°C | 27.7°C | 6.4°C | 73 mm | 86% | 0.1 m/s | 4.3 |
| 2017 | 20.4°C | 15.2°C | 10.1°C | 24.8°C | 5.2°C | 115 mm | 85% | 0.1 m/s | 4.5 |
| 2016 | 20.7°C | 15.8°C | 10.9°C | 25.0°C | 6.5°C | 125 mm | 85% | 0.1 m/s | 4.4 |
| 2015 | 23.5°C | 18.0°C | 12.6°C | 28.6°C | 8.7°C | 95 mm | 85% | 0.1 m/s | 4.6 |
| 2014 | 19.9°C | 15.8°C | 11.6°C | 26.5°C | 3.9°C | 153 mm | 89% | 0.1 m/s | 3.7 |
| 2013 | 21.0°C | 15.8°C | 10.6°C | 26.0°C | 2.9°C | 140 mm | 83% | 0.1 m/s | 4.5 |
| 2012 | 22.6°C | 17.8°C | 13.1°C | 27.1°C | 7.7°C | 110 mm | 86% | 0.1 m/s | 3.9 |
| 2011 | 20.7°C | 16.0°C | 11.3°C | 27.0°C | 5.9°C | 49 mm | 85% | 0.1 m/s | 4.2 |
| 2010 | 21.7°C | 16.4°C | 11.1°C | 26.5°C | 7.4°C | 46 mm | 84% | 0.1 m/s | 4.4 |
| 2009 | 21.0°C | 16.0°C | 11.0°C | 26.9°C | 6.0°C | 156 mm | 84% | 0.1 m/s | 4.2 |
| 2008 | 20.4°C | 15.8°C | 11.2°C | 26.1°C | 7.2°C | 127 mm | 88% | 0.1 m/s | 3.6 |
| 2007 | 20.7°C | 15.5°C | 10.4°C | 24.6°C | 6.9°C | 124 mm | 85% | 0.1 m/s | 4.3 |
| 2006 | 19.7°C | 14.6°C | 9.6°C | 24.6°C | 4.5°C | 101 mm | 84% | 0.1 m/s | 4.1 |
| 2005 | 20.7°C | 15.6°C | 10.5°C | 26.5°C | 6.7°C | 116 mm | 85% | 0.1 m/s | 4.4 |
| 2004 | 22.6°C | 17.3°C | 12.1°C | 27.1°C | 6.5°C | 148 mm | 85% | 0.1 m/s | 4.4 |
| 2003 | 21.2°C | 15.8°C | 10.4°C | 26.2°C | 5.6°C | 76 mm | 82% | 0.1 m/s | 4.7 |
| 2002 | 20.9°C | 15.6°C | 10.4°C | 29.1°C | 1.5°C | 114 mm | 85% | 0.1 m/s | 4.4 |
| 2001 | 22.1°C | 16.7°C | 11.3°C | 29.1°C | 4.9°C | 79 mm | 83% | 0.1 m/s | 4.7 |
| 2000 | 21.6°C | 16.4°C | 11.2°C | 27.4°C | 6.7°C | 125 mm | 86% | 0.1 m/s | 4.3 |
| 1999 | 21.1°C | 15.8°C | 10.5°C | 25.9°C | 5.3°C | 142 mm | 84% | 0.1 m/s | 4.3 |
| 1998 | 20.3°C | 15.6°C | 10.8°C | 27.7°C | 6.2°C | 138 mm | 86% | 0.1 m/s | 4.6 |
| 1997 | 19.4°C | 14.7°C | 10.1°C | 26.2°C | 3.1°C | 129 mm | 86% | 0.1 m/s | 4 |
| 1996 | 22.6°C | 17.1°C | 11.6°C | 29.7°C | 6.4°C | 37 mm | 82% | 0.1 m/s | 5.1 |
| 1995 | 19.8°C | 14.4°C | 9.0°C | 28.1°C | 3.2°C | 117 mm | 84% | 0.1 m/s | 4.4 |
| 1994 | 21.6°C | 16.2°C | 10.7°C | 27.1°C | 5.4°C | 56 mm | 83% | 0.1 m/s | 4.9 |
| 1993 | 20.2°C | 15.5°C | 10.7°C | 27.5°C | 5.6°C | 96 mm | 85% | 0.1 m/s | 4.7 |
| 1992 | 19.4°C | 14.5°C | 9.7°C | 24.4°C | 4.6°C | 124 mm | 86% | 0.1 m/s | 4.2 |
| 1991 | 19.7°C | 14.5°C | 9.2°C | 26.5°C | 4.6°C | 152 mm | 84% | 0.1 m/s | 4.1 |
| 1990 | 23.7°C | 17.9°C | 12.1°C | 28.8°C | 5.1°C | 66 mm | 79% | 0.1 m/s | 4.8 |
| 1989 | 22.7°C | 17.3°C | 11.8°C | 27.9°C | 4.5°C | 93 mm | 78% | 0.1 m/s | 4.3 |
| 1988 | 21.6°C | 15.9°C | 10.2°C | 28.3°C | 6.1°C | 62 mm | 79% | 0.1 m/s | 4.6 |
| 1987 | 20.8°C | 15.2°C | 9.6°C | 26.7°C | 5.7°C | 42 mm | 78% | 0.1 m/s | 4.5 |
| 1986 | 20.6°C | 15.5°C | 10.4°C | 25.1°C | 5.6°C | 64 mm | 85% | 0.1 m/s | 4.6 |
| 1985 | 19.4°C | 14.7°C | 9.9°C | 28.2°C | 4.9°C | 77 mm | 85% | 0.1 m/s | 4.5 |
| 1984 | 21.7°C | 16.4°C | 11.1°C | 26.4°C | 5.3°C | 149 mm | 86% | 0.1 m/s | 4.7 |
| 1983 ❄️ 🌧️ | 19.0°C | 13.9°C | 8.7°C | 25.2°C | 3.4°C | 167 mm | 86% | 0.1 m/s | — |
| 1982 | 20.0°C | 14.8°C | 9.6°C | 25.6°C | 4.4°C | 57 mm | 82% | 0.1 m/s | — |
| 1981 | 20.4°C | 15.3°C | 10.3°C | 25.2°C | 5.5°C | 112 mm | 86% | 0.1 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 21.2°C with lows near 10.9°C (mean 16.1°C), based on 45 years of NASA POWER data.
August averages 100 mm of rainfall in Grand Falls, a relatively wet time of year. The wettest on record was 167 mm in 1983.
The hottest August reached 30.2°C in 2025. The coldest dipped to 1.5°C in 2002.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.9°C. Daytime highs moved from 20.1°C to 22.1°C and overnight lows from 9.9°C to 11.7°C over the same span.
August is one of the warmer months of the year in Grand Falls and a relatively wet time of year, so plan for around 21.2°C daytime highs and 10.9°C at night.
Not quite — August is the 11th coolest month in Grand Falls, averaging 16.1°C.
For August in Grand Falls, pack light layers you can adjust through the day, with typical highs of 21.2°C and lows of 10.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 84% — quite humid.
Average wind speed in August is 0.1 m/s. The windiest August on record averaged 0.1 m/s (1981).
The wettest August on record was 1983 with 167 mm. On average, August sees 100 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 Grand 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.
