August is one of the warmer months of the year in Monroe, with average highs near 27.4°C and lows around 15.6°C (mean 21.5°C). It is a relatively wet time of year, averaging 111 mm of rainfall and 73% relative humidity across the period.
August is one of the warmer months of the year in Monroe. Across 45 years of records, the warmest August in Monroe was 2022 — when the month averaged 24.5°C — while the coldest was 1986 at 19.1°C. Typical August days reach 27.4°C with nights near 15.6°C. The long-term trend is warming, about 0.4°C per decade.
August is a relatively wet time of year in Monroe, averaging 111 mm of rainfall. The wettest August on record was 2011 with 372 mm, while the driest was 1981 at 32 mm.
Relative humidity in Monroe during August averages 73%. The most humid August was 2018 at 85%, and the least humid was 1995 at 58%.
August receives about 5.1 kWh/m²/day of solar energy in Monroe. The sunniest Augusts were 2015 and 2016 at 5.7 kWh/m²/day, and the cloudiest was 2021 at 4.6.
Average wind speed in Monroe during August is 0.1 m/s. The windiest August was 2013 at 0.2 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 | 20.6°C | 21.2°C | 21.9°C | 21.6°C | 22.3°C | +1.7°C |
| Avg High | 26.8°C | 27.4°C | 27.6°C | 27.3°C | 28.0°C | +1.2°C |
| Avg Low | 14.5°C | 15.1°C | 16.1°C | 16.0°C | 16.7°C | +2.2°C |
| Avg Rain | 88 mm | 103 mm | 112 mm | 133 mm | 119 mm | +32 mm |
August temperatures in Monroe have risen by about 1.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 4.3°C (1982) to a record high of 38.6°C (2001).
Rainfall in August is a relatively wet time of year, averaging 111 mm, with a wettest year of 372 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
One of the best times to visit Monroe
August is one of the best times to visit Monroe. Expect days averaging 27.4°C and nights around 15.6°C (mean 21.5°C) — warmer than Monroe's yearly average — with higher rainfall (111 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 | 28.0°C | 21.4°C | 14.8°C | 34.8°C | 8.5°C | 45 mm | 64% | 0.1 m/s | 5.5 |
| 2024 | 27.1°C | 21.7°C | 16.2°C | 33.6°C | 9.8°C | 169 mm | 78% | 0.1 m/s | 4.7 |
| 2023 | 25.8°C | 20.7°C | 15.7°C | 29.0°C | 11.1°C | 152 mm | 80% | 0.1 m/s | 4.8 |
| 2022 🔥 | 30.8°C | 24.5°C | 18.3°C | 36.5°C | 13.0°C | 49 mm | 63% | 0.1 m/s | 5.6 |
| 2021 | 28.1°C | 23.0°C | 18.0°C | 34.0°C | 11.6°C | 162 mm | 79% | 0.1 m/s | 4.6 |
| 2020 | 28.3°C | 22.6°C | 16.9°C | 32.4°C | 11.4°C | 138 mm | 73% | 0.1 m/s | 5.4 |
| 2019 | 26.7°C | 21.4°C | 16.2°C | 30.6°C | 10.0°C | 96 mm | 78% | 0.1 m/s | 5.4 |
| 2018 | 27.1°C | 22.6°C | 18.1°C | 33.5°C | 13.1°C | 186 mm | 85% | 0.1 m/s | 4.8 |
| 2017 | 26.1°C | 20.6°C | 15.0°C | 30.8°C | 9.9°C | 98 mm | 75% | 0.1 m/s | 5.2 |
| 2016 | 29.2°C | 23.3°C | 17.4°C | 32.7°C | 10.7°C | 85 mm | 72% | 0.1 m/s | 5.7 |
| 2015 | 29.1°C | 22.5°C | 15.9°C | 33.6°C | 11.9°C | 83 mm | 66% | 0.1 m/s | 5.7 |
| 2014 | 27.0°C | 20.8°C | 14.6°C | 33.4°C | 10.3°C | 52 mm | 70% | 0.1 m/s | 5.2 |
| 2013 | 25.2°C | 20.0°C | 14.9°C | 29.0°C | 9.8°C | 139 mm | 79% | 0.2 m/s | 5 |
| 2012 | 28.3°C | 22.1°C | 16.0°C | 33.1°C | 10.4°C | 86 mm | 70% | 0.1 m/s | 5.4 |
| 2011 🌧️ | 25.6°C | 20.6°C | 15.6°C | 31.4°C | 9.5°C | 372 mm | 83% | 0.1 m/s | 4.9 |
| 2010 | 28.3°C | 22.3°C | 16.3°C | 34.1°C | 10.8°C | 130 mm | 69% | 0.1 m/s | 4.8 |
| 2009 | 26.4°C | 21.5°C | 16.7°C | 33.1°C | 10.8°C | 140 mm | 84% | 0.1 m/s | 5.1 |
| 2008 | 26.4°C | 20.3°C | 14.2°C | 29.3°C | 8.8°C | 82 mm | 72% | 0.1 m/s | 5.5 |
| 2007 | 27.9°C | 21.8°C | 15.7°C | 34.9°C | 10.6°C | 111 mm | 73% | 0.1 m/s | 5 |
| 2006 | 26.8°C | 21.4°C | 16.0°C | 32.4°C | 9.8°C | 131 mm | 74% | 0.1 m/s | 5.3 |
| 2005 | 30.5°C | 24.3°C | 18.0°C | 36.3°C | 13.0°C | 61 mm | 66% | 0.1 m/s | 4.8 |
| 2004 | 25.8°C | 20.5°C | 15.3°C | 30.3°C | 9.4°C | 176 mm | 82% | 0.1 m/s | 4.7 |
| 2003 | 26.6°C | 21.7°C | 16.7°C | 31.8°C | 9.4°C | 144 mm | 83% | 0.1 m/s | 4.8 |
| 2002 | 30.3°C | 23.6°C | 16.9°C | 36.9°C | 12.6°C | 97 mm | 60% | 0.1 m/s | 5.4 |
| 2001 | 30.7°C | 23.9°C | 17.1°C | 38.6°C | 12.2°C | 73 mm | 63% | 0.1 m/s | 4.9 |
| 2000 | 25.0°C | 19.8°C | 14.7°C | 31.1°C | 8.0°C | 101 mm | 81% | 0.1 m/s | 4.7 |
| 1999 | 28.4°C | 21.9°C | 15.5°C | 35.0°C | 10.3°C | 98 mm | 62% | 0.1 m/s | 5 |
| 1998 | 28.4°C | 22.2°C | 16.0°C | 31.4°C | 9.1°C | 61 mm | 69% | 0.1 m/s | 5.2 |
| 1997 | 26.5°C | 20.5°C | 14.5°C | 32.0°C | 10.6°C | 131 mm | 69% | 0.1 m/s | 4.9 |
| 1996 | 26.1°C | 20.5°C | 14.9°C | 30.0°C | 11.0°C | 54 mm | 78% | 0.1 m/s | 5.4 |
| 1995 | 30.6°C | 23.1°C | 15.7°C | 35.4°C | 10.5°C | 43 mm | 58% | 0.1 m/s | 5.6 |
| 1994 | 25.2°C | 19.5°C | 13.9°C | 29.4°C | 8.6°C | 155 mm | 78% | 0.1 m/s | 4.8 |
| 1993 | 29.6°C | 22.8°C | 16.1°C | 35.5°C | 11.1°C | 61 mm | 65% | 0.1 m/s | 5.1 |
| 1992 | 25.2°C | 19.3°C | 13.5°C | 31.2°C | 7.8°C | 86 mm | 75% | 0.1 m/s | 5.3 |
| 1991 | 28.5°C | 22.2°C | 15.9°C | 33.6°C | 12.0°C | 129 mm | 69% | 0.1 m/s | 5 |
| 1990 | 25.3°C | 20.3°C | 15.3°C | 29.8°C | 11.3°C | 214 mm | 82% | 0.1 m/s | 4.7 |
| 1989 | 25.5°C | 20.2°C | 14.9°C | 32.4°C | 8.5°C | 104 mm | 78% | 0.1 m/s | 4.8 |
| 1988 | 29.1°C | 22.7°C | 16.3°C | 35.5°C | 7.8°C | 102 mm | 67% | 0.1 m/s | 5.1 |
| 1987 | 26.9°C | 20.4°C | 13.8°C | 34.0°C | 7.7°C | 125 mm | 69% | 0.1 m/s | 4.8 |
| 1986 ❄️ | 24.6°C | 19.1°C | 13.6°C | 31.8°C | 4.8°C | 102 mm | 76% | 0.1 m/s | 5.3 |
| 1985 | 26.9°C | 20.7°C | 14.4°C | 32.3°C | 10.6°C | 87 mm | 68% | 0.1 m/s | 4.8 |
| 1984 | 25.6°C | 20.3°C | 15.1°C | 29.6°C | 7.4°C | 61 mm | 82% | 0.1 m/s | 5.6 |
| 1983 | 28.2°C | 21.7°C | 15.1°C | 32.9°C | 8.8°C | 93 mm | 71% | 0.1 m/s | — |
| 1982 | 25.9°C | 19.3°C | 12.7°C | 30.5°C | 4.3°C | 84 mm | 68% | 0.1 m/s | — |
| 1981 | 28.3°C | 21.3°C | 14.3°C | 31.6°C | 8.2°C | 32 mm | 63% | 0.1 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 27.4°C with lows near 15.6°C (mean 21.5°C), based on 45 years of NASA POWER data.
August averages 111 mm of rainfall in Monroe, a relatively wet time of year. The wettest on record was 372 mm in 2011.
The hottest August reached 38.6°C in 2001. The coldest dipped to 4.3°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.6°C. Daytime highs moved from 27°C to 28°C and overnight lows from 14.3°C to 16.6°C over the same span.
August is one of the warmer months of the year in Monroe and a relatively wet time of year, so plan for around 27.4°C daytime highs and 15.6°C at night.
Not quite — August is the 11th coolest month in Monroe, averaging 21.5°C.
For August in Monroe, pack light layers you can adjust through the day, with typical highs of 27.4°C and lows of 15.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 73% — moderately humid.
Average wind speed in August is 0.1 m/s. The windiest August on record averaged 0.2 m/s (2013).
The wettest August on record was 2011 with 372 mm. On average, August sees 111 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 Monroe 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.
