August is one of the warmer months of the year in Post Falls, with average highs near 27.3°C and lows around 12.6°C (mean 20°C). It is one of the drier months, averaging 22 mm of rainfall and 50% relative humidity across the period.
August is one of the warmer months of the year in Post Falls. Across 45 years of records, the warmest August in Post Falls was 2022 — when the month averaged 22.9°C — while the coldest was 1995 at 16.5°C. Typical August days reach 27.3°C with nights near 12.6°C. The long-term trend is warming, about 0.5°C per decade.
August is one of the drier months in Post Falls, averaging 22 mm of rainfall. The wettest August on record was 2004 with 78 mm, while the driest was 1988 at 3 mm.
Relative humidity in Post Falls during August averages 50%. The most humid August was 1993 at 62%, and the least humid was 2015 at 39%.
August receives about 6 kWh/m²/day of solar energy in Post Falls. The sunniest August was 2011 at 6.8 kWh/m²/day, and the cloudiest was 1989 at 5.2.
Average wind speed in Post Falls during August is 1 m/s. The windiest August was 2000 at 1.2 m/s, while the calmest were 1981, 1990 and 2013 at 0.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.3°C | 19.3°C | 19.8°C | 20.5°C | 21.3°C | +2°C |
| Avg High | 26.7°C | 26.6°C | 27.3°C | 27.9°C | 28.7°C | +2°C |
| Avg Low | 12.0°C | 12.0°C | 12.2°C | 13.1°C | 14.0°C | +2°C |
| Avg Rain | 25 mm | 26 mm | 23 mm | 15 mm | 22 mm | -2 mm |
August temperatures in Post Falls have risen by about 2°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 1.2°C (1992) to a record high of 39.3°C (2024).
Rainfall in August is one of the drier months, averaging 22 mm, with a wettest year of 78 mm.
One of the best times to visit Post Falls
August is one of the best times to visit Post Falls. Expect days averaging 27.3°C and nights around 12.6°C (mean 20°C) — warmer than Post Falls's yearly average — with low rainfall (22 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 | 28.6°C | 21.5°C | 14.5°C | 35.3°C | 10.3°C | 29 mm | 52% | 1 m/s | 5.6 |
| 2024 | 28.3°C | 20.7°C | 13.0°C | 39.3°C | 7.0°C | 22 mm | 48% | 1 m/s | 5.6 |
| 2023 | 29.0°C | 21.9°C | 14.8°C | 37.8°C | 10.4°C | 42 mm | 49% | 1 m/s | 5.4 |
| 2022 🔥 | 30.6°C | 22.9°C | 15.2°C | 37.9°C | 9.8°C | 10 mm | 49% | 1 m/s | 6.2 |
| 2021 | 27.7°C | 20.7°C | 13.7°C | 36.0°C | 6.5°C | 23 mm | 47% | 1.1 m/s | 5.3 |
| 2020 | 27.9°C | 20.4°C | 12.8°C | 37.1°C | 7.2°C | 9 mm | 45% | 1.1 m/s | 6.3 |
| 2019 | 28.4°C | 21.2°C | 13.9°C | 35.3°C | 10.1°C | 21 mm | 47% | 1 m/s | 6 |
| 2018 | 27.4°C | 20.2°C | 13.0°C | 38.9°C | 6.7°C | 13 mm | 48% | 1 m/s | 5.8 |
| 2017 | 29.7°C | 21.9°C | 14.1°C | 36.1°C | 9.0°C | 3 mm | 44% | 1 m/s | 5.9 |
| 2016 | 27.8°C | 20.3°C | 12.8°C | 32.7°C | 9.3°C | 14 mm | 46% | 1 m/s | 6.3 |
| 2015 | 28.8°C | 21.5°C | 14.1°C | 37.2°C | 8.1°C | 7 mm | 39% | 1.1 m/s | 5.6 |
| 2014 | 27.7°C | 20.8°C | 13.8°C | 36.0°C | 9.6°C | 30 mm | 54% | 1 m/s | 5.7 |
| 2013 | 28.2°C | 21.1°C | 13.9°C | 34.2°C | 10.7°C | 41 mm | 54% | 0.9 m/s | 5.8 |
| 2012 | 27.9°C | 20.0°C | 12.1°C | 33.5°C | 6.8°C | 6 mm | 53% | 1 m/s | 6.6 |
| 2011 | 27.3°C | 19.8°C | 12.3°C | 34.1°C | 7.6°C | 3 mm | 52% | 1 m/s | 6.8 |
| 2010 | 25.8°C | 18.6°C | 11.4°C | 33.0°C | 5.9°C | 14 mm | 53% | 1.1 m/s | 6.1 |
| 2009 | 27.2°C | 19.9°C | 12.6°C | 36.6°C | 7.7°C | 32 mm | 52% | 1 m/s | 5.9 |
| 2008 | 26.2°C | 18.7°C | 11.2°C | 38.2°C | 4.6°C | 42 mm | 54% | 1.1 m/s | 5.9 |
| 2007 | 26.3°C | 18.8°C | 11.4°C | 33.8°C | 7.6°C | 16 mm | 46% | 1.1 m/s | 6.3 |
| 2006 | 27.1°C | 19.4°C | 11.6°C | 36.0°C | 6.4°C | 9 mm | 45% | 1.1 m/s | 6.5 |
| 2005 | 27.9°C | 19.9°C | 11.8°C | 35.5°C | 6.6°C | 8 mm | 40% | 1.1 m/s | 6.6 |
| 2004 🌧️ | 27.4°C | 20.4°C | 13.4°C | 37.3°C | 9.0°C | 78 mm | 55% | 1 m/s | 5.4 |
| 2003 | 29.2°C | 21.4°C | 13.7°C | 34.7°C | 11.0°C | 17 mm | 43% | 1 m/s | 6.3 |
| 2002 | 25.8°C | 18.5°C | 11.2°C | 31.7°C | 6.3°C | 18 mm | 48% | 1 m/s | 6.4 |
| 2001 | 29.5°C | 21.6°C | 13.6°C | 37.5°C | 7.6°C | 4 mm | 41% | 1 m/s | 6.4 |
| 2000 | 26.8°C | 19.1°C | 11.4°C | 34.0°C | 6.5°C | 4 mm | 46% | 1.2 m/s | 6.7 |
| 1999 | 27.3°C | 20.1°C | 12.8°C | 34.9°C | 5.3°C | 46 mm | 57% | 1 m/s | 5.8 |
| 1998 | 28.7°C | 20.8°C | 12.8°C | 36.5°C | 7.1°C | 10 mm | 50% | 1 m/s | 6.5 |
| 1997 | 27.3°C | 20.2°C | 13.0°C | 33.5°C | 8.1°C | 20 mm | 57% | 1 m/s | 6.2 |
| 1996 | 26.3°C | 18.8°C | 11.4°C | 34.4°C | 6.7°C | 23 mm | 52% | 1.1 m/s | 6.1 |
| 1995 ❄️ | 23.5°C | 16.5°C | 9.6°C | 29.9°C | 4.6°C | 32 mm | 56% | 1.1 m/s | 5.6 |
| 1994 | 28.6°C | 20.8°C | 13.0°C | 36.1°C | 8.1°C | 7 mm | 41% | 1 m/s | 6.4 |
| 1993 | 23.6°C | 16.8°C | 9.9°C | 30.5°C | 3.2°C | 27 mm | 62% | 1 m/s | 5.8 |
| 1992 | 27.0°C | 19.4°C | 11.9°C | 35.2°C | 1.2°C | 39 mm | 44% | 1.1 m/s | 6.1 |
| 1991 | 27.1°C | 20.1°C | 13.1°C | 32.0°C | 7.3°C | 11 mm | 55% | 1 m/s | 6.2 |
| 1990 | 26.4°C | 19.6°C | 12.7°C | 36.0°C | 6.4°C | 44 mm | 58% | 0.9 m/s | 5.6 |
| 1989 | 24.0°C | 17.4°C | 10.7°C | 34.5°C | 6.7°C | 77 mm | 60% | 1 m/s | 5.2 |
| 1988 | 27.0°C | 19.2°C | 11.4°C | 37.1°C | 8.0°C | 3 mm | 42% | 1.1 m/s | 6.3 |
| 1987 | 25.4°C | 18.0°C | 10.6°C | 32.7°C | 6.5°C | 25 mm | 51% | 1 m/s | 6.1 |
| 1986 | 29.9°C | 21.9°C | 13.9°C | 35.7°C | 10.6°C | 15 mm | 42% | 1 m/s | 6.3 |
| 1985 | 24.7°C | 17.5°C | 10.3°C | 31.4°C | 5.5°C | 27 mm | 48% | 1.1 m/s | 5.7 |
| 1984 | 27.1°C | 19.5°C | 12.0°C | 34.9°C | 5.3°C | 14 mm | 52% | 1 m/s | 6 |
| 1983 | 26.8°C | 20.2°C | 13.6°C | 35.7°C | 8.9°C | 38 mm | 60% | 1 m/s | — |
| 1982 | 26.1°C | 19.2°C | 12.3°C | 34.4°C | 8.1°C | 15 mm | 54% | 1 m/s | — |
| 1981 | 29.0°C | 21.1°C | 13.2°C | 35.4°C | 7.6°C | 9 mm | 48% | 0.9 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 27.3°C with lows near 12.6°C (mean 20°C), based on 45 years of NASA POWER data.
August averages 22 mm of rainfall in Post Falls, one of the drier months. The wettest on record was 78 mm in 2004.
The hottest August reached 39.3°C in 2024. The coldest dipped to 1.2°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2°C. Daytime highs moved from 26.7°C to 28.8°C and overnight lows from 12.3°C to 14.2°C over the same span.
August is one of the warmer months of the year in Post Falls and one of the drier months, so plan for around 27.3°C daytime highs and 12.6°C at night.
Not quite — August is the 12th coolest month in Post Falls, averaging 20°C.
For August in Post Falls, pack light layers you can adjust through the day, with typical highs of 27.3°C and lows of 12.6°C.
Relative humidity in August averages 50% — relatively dry.
Average wind speed in August is 1 m/s. The windiest August on record averaged 1.2 m/s (2000).
The wettest August on record was 2004 with 78 mm. On average, August sees 22 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 Post 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.
