August is close to Palmerston's year-round average, with average highs near 34.6°C and lows around 20.5°C (mean 27.6°C). It is one of the drier months, averaging 3 mm of rainfall and 49% relative humidity across the period.
August is close to Palmerston's year-round average. Across 45 years of records, the warmest Augusts in Palmerston were 1981 and 2024 — when the month averaged 29.2°C — while the coldest was 1994 at 25.9°C. Typical August days reach 34.6°C with nights near 20.5°C. The long-term August temperature trend is broadly flat.
August is one of the drier months in Palmerston, averaging 3 mm of rainfall. The wettest August on record was 1981 with 20 mm, while the driest were 2006, 2008 and 2012, among others at 0 mm.
Relative humidity in Palmerston during August averages 49%. The most humid August was 1985 at 57%, and the least humid was 2014 at 36%.
August receives about 5.9 kWh/m²/day of solar energy in Palmerston. The sunniest August was 2002 at 6.3 kWh/m²/day, and the cloudiest was 2003 at 5.5.
Average wind speed in Palmerston during August is 2.5 m/s. The windiest August was 1995 at 3.3 m/s, while the calmest was 2004 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.9°C | 27.4°C | 27.2°C | 27.3°C | 28.4°C | +0.5°C |
| Avg High | 34.7°C | 34.4°C | 34.3°C | 34.5°C | 35.5°C | +0.8°C |
| Avg Low | 21.1°C | 20.3°C | 20.1°C | 20.1°C | 21.4°C | +0.3°C |
| Avg Rain | 7 mm | 3 mm | 1 mm | 1 mm | 3 mm | -4 mm |
August temperatures in Palmerston have stayed relatively stable across the record.
August has ranged from a record low of 11.3°C (1990) to a record high of 38.9°C (1988).
Rainfall in August is one of the drier months, averaging 3 mm, with a wettest year of 20 mm.
One of the best times to visit Palmerston
August is one of the best times to visit Palmerston. Expect days averaging 34.6°C and nights around 20.5°C (mean 27.6°C) — close to Palmerston's yearly average — with low rainfall (3 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 | 34.9°C | 27.4°C | 20.0°C | 37.6°C | 15.7°C | 4 mm | 43% | 2.5 m/s | 6 |
| 2024 | 36.1°C | 29.2°C | 22.3°C | 38.6°C | 17.8°C | 1 mm | 52% | 2.3 m/s | 6.1 |
| 2023 | 35.0°C | 28.0°C | 21.1°C | 36.6°C | 19.5°C | 1 mm | 50% | 3 m/s | 6 |
| 2022 | 35.5°C | 28.4°C | 21.4°C | 37.1°C | 16.4°C | 1 mm | 49% | 2.4 m/s | 6 |
| 2021 | 35.7°C | 29.0°C | 22.2°C | 37.6°C | 17.0°C | 14 mm | 50% | 2.4 m/s | 6 |
| 2020 | 35.7°C | 28.6°C | 21.6°C | 37.9°C | 17.2°C | 1 mm | 51% | 2.3 m/s | 6.1 |
| 2019 | 34.4°C | 27.2°C | 20.0°C | 36.5°C | 14.9°C | 1 mm | 45% | 2.5 m/s | 6.1 |
| 2018 | 34.3°C | 27.6°C | 20.9°C | 36.2°C | 16.5°C | 2 mm | 47% | 2.1 m/s | 6 |
| 2017 | 35.4°C | 28.1°C | 20.9°C | 37.2°C | 16.9°C | 0 mm | 49% | 2.5 m/s | 6.2 |
| 2016 | 34.6°C | 27.8°C | 21.1°C | 37.1°C | 14.4°C | 2 mm | 49% | 2.6 m/s | 6 |
| 2015 | 34.1°C | 27.1°C | 20.2°C | 36.9°C | 15.9°C | 1 mm | 52% | 2.6 m/s | 6 |
| 2014 | 33.9°C | 26.0°C | 18.1°C | 35.4°C | 14.3°C | 0 mm | 36% | 2.7 m/s | 6 |
| 2013 | 34.9°C | 27.6°C | 20.3°C | 36.9°C | 16.3°C | 7 mm | 51% | 2.3 m/s | 5.8 |
| 2012 | 34.1°C | 26.4°C | 18.7°C | 37.3°C | 13.3°C | 0 mm | 48% | 2.2 m/s | 5.9 |
| 2011 | 34.0°C | 26.7°C | 19.4°C | 37.8°C | 15.7°C | 0 mm | 46% | 2.6 m/s | 5.9 |
| 2010 | 35.5°C | 28.7°C | 21.8°C | 38.0°C | 17.8°C | 1 mm | 45% | 2.7 m/s | 5.6 |
| 2009 | 35.1°C | 28.0°C | 20.9°C | 38.1°C | 16.9°C | 1 mm | 53% | 2.3 m/s | 5.9 |
| 2008 | 34.5°C | 27.1°C | 19.7°C | 37.4°C | 16.0°C | 0 mm | 42% | 3.2 m/s | 5.8 |
| 2007 | 33.9°C | 27.0°C | 20.0°C | 36.4°C | 16.1°C | 3 mm | 50% | 2.5 m/s | 5.6 |
| 2006 | 33.4°C | 26.1°C | 18.8°C | 37.0°C | 14.0°C | 0 mm | 49% | 2.9 m/s | 6 |
| 2005 | 34.3°C | 27.4°C | 20.6°C | 35.6°C | 17.3°C | 2 mm | 48% | 2.8 m/s | 5.6 |
| 2004 | 34.2°C | 27.2°C | 20.2°C | 36.1°C | 15.9°C | 4 mm | 52% | 2 m/s | 5.8 |
| 2003 | 34.6°C | 28.2°C | 21.8°C | 36.2°C | 15.1°C | 2 mm | 54% | 2.4 m/s | 5.5 |
| 2002 | 34.0°C | 26.1°C | 18.3°C | 36.4°C | 12.7°C | 0 mm | 42% | 2.4 m/s | 6.3 |
| 2001 | 33.9°C | 26.5°C | 19.2°C | 36.4°C | 15.5°C | 0 mm | 48% | 2.3 m/s | 6 |
| 2000 | 34.9°C | 28.1°C | 21.3°C | 36.7°C | 17.8°C | 0 mm | 54% | 2.1 m/s | 5.9 |
| 1999 | 34.3°C | 27.0°C | 19.8°C | 36.2°C | 15.2°C | 0 mm | 50% | 2.5 m/s | 5.9 |
| 1998 | 35.4°C | 28.4°C | 21.3°C | 37.7°C | 16.1°C | 4 mm | 48% | 2.4 m/s | 5.8 |
| 1997 | 33.2°C | 26.8°C | 20.3°C | 35.3°C | 17.3°C | 6 mm | 52% | 2.5 m/s | 5.7 |
| 1996 | 34.6°C | 28.1°C | 21.7°C | 36.9°C | 16.9°C | 12 mm | 56% | 2.4 m/s | 5.7 |
| 1995 | 34.4°C | 27.2°C | 20.0°C | 37.1°C | 14.6°C | 3 mm | 47% | 3.3 m/s | 5.9 |
| 1994 ❄️ | 33.8°C | 25.9°C | 18.1°C | 36.1°C | 13.6°C | 0 mm | 43% | 3.2 m/s | 6 |
| 1993 | 33.8°C | 27.5°C | 21.1°C | 36.3°C | 17.2°C | 4 mm | 55% | 2.8 m/s | 5.8 |
| 1992 | 35.2°C | 28.5°C | 21.9°C | 36.8°C | 17.2°C | 1 mm | 54% | 2.4 m/s | 5.7 |
| 1991 | 34.9°C | 27.2°C | 19.5°C | 37.5°C | 15.9°C | 0 mm | 47% | 2.4 m/s | 5.6 |
| 1990 | 34.6°C | 27.0°C | 19.3°C | 36.8°C | 11.3°C | 0 mm | 50% | 2.6 m/s | 5.8 |
| 1989 | 34.3°C | 26.6°C | 19.0°C | 38.3°C | 13.5°C | 0 mm | 43% | 2.7 m/s | 5.9 |
| 1988 | 35.8°C | 29.0°C | 22.3°C | 38.9°C | 18.4°C | 18 mm | 50% | 2.8 m/s | 5.8 |
| 1987 | 34.8°C | 27.6°C | 20.4°C | 37.0°C | 15.6°C | 0 mm | 48% | 2.6 m/s | 5.6 |
| 1986 | 33.6°C | 26.7°C | 19.8°C | 37.4°C | 11.9°C | 5 mm | 51% | 2.3 m/s | 5.6 |
| 1985 | 35.1°C | 28.2°C | 21.3°C | 37.8°C | 17.2°C | 0 mm | 57% | 2.5 m/s | 6 |
| 1984 | 35.0°C | 28.7°C | 22.3°C | 37.5°C | 17.1°C | 10 mm | 55% | 2.1 m/s | 5.7 |
| 1983 | 35.0°C | 28.2°C | 21.3°C | 37.5°C | 14.8°C | 3 mm | 51% | 2.6 m/s | — |
| 1982 | 33.1°C | 26.6°C | 20.2°C | 34.7°C | 14.1°C | 10 mm | 50% | 3.2 m/s | — |
| 1981 🔥 🌧️ | 35.5°C | 29.2°C | 23.0°C | 37.7°C | 16.2°C | 20 mm | 57% | 2.3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 34.6°C with lows near 20.5°C (mean 27.6°C), based on 45 years of NASA POWER data.
August averages 3 mm of rainfall in Palmerston, one of the drier months. The wettest on record was 20 mm in 1981.
The hottest August reached 38.9°C in 1988. The coldest dipped to 11.3°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Daytime highs rose from 34.7°C to 35.4°C while overnight lows fell from 21.6°C to 21.4°C, widening the gap between day and night.
August is close to Palmerston's year-round average and one of the drier months, so plan for around 34.6°C daytime highs and 20.5°C at night.
Not quite — August is the 5th coolest month in Palmerston, averaging 27.6°C.
For August in Palmerston, pack light, breathable clothing and sun protection, with typical highs of 34.6°C and lows of 20.5°C.
Relative humidity in August averages 49% — relatively dry.
Average wind speed in August is 2.5 m/s. The windiest August on record averaged 3.3 m/s (1995).
The wettest August on record was 1981 with 20 mm. On average, August sees 3 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 Palmerston 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.
