August is one of the warmer months of the year in New Britain, with average highs near 27.7°C and lows around 17.3°C (mean 22.5°C). It is about average for rainfall, averaging 99 mm of rainfall and 74% relative humidity across the period.
August is one of the warmer months of the year in New Britain. Across 45 years of records, the warmest August in New Britain was 2022 — when the month averaged 25.1°C — while the coldest were 1982 and 1992 at 20.2°C. Typical August days reach 27.7°C with nights near 17.3°C. The long-term trend is warming, about 0.5°C per decade.
August is about average for rainfall in New Britain, averaging 99 mm of rainfall. The wettest August on record was 2011 with 266 mm, while the driest was 1984 at 22 mm.
Relative humidity in New Britain during August averages 74%. The most humid August was 2018 at 82%, and the least humid was 1995 at 62%.
August receives about 5.3 kWh/m²/day of solar energy in New Britain. The sunniest Augusts were 1984, 2015 and 2016 at 5.9 kWh/m²/day, and the cloudiest was 2021 at 4.6.
Average wind speed in New Britain during August is 0.4 m/s. The windiest Augusts were 2023, 2024 and 2025, among others at 0.5 m/s, while the calmest were 2019, 2021 and 2022, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.5°C | 22.0°C | 22.8°C | 23.0°C | 23.3°C | +1.8°C |
| Avg High | 26.8°C | 27.4°C | 27.9°C | 28.1°C | 28.4°C | +1.6°C |
| Avg Low | 16.2°C | 16.6°C | 17.8°C | 17.8°C | 18.2°C | +2°C |
| Avg Rain | 92 mm | 117 mm | 85 mm | 103 mm | 100 mm | +7 mm |
August temperatures in New Britain have risen by about 1.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 6.8°C (1986) to a record high of 38°C (2001).
Rainfall in August is about average for rainfall, averaging 99 mm, with a wettest year of 266 mm.
One of the best times to visit New Britain
August is one of the best times to visit New Britain. Expect days averaging 27.7°C and nights around 17.3°C (mean 22.5°C) — warmer than New Britain's yearly average — with higher rainfall (99 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 | 22.5°C | 16.5°C | 34.7°C | 11.5°C | 50 mm | 65% | 0.5 m/s | 5.8 |
| 2024 | 26.9°C | 22.1°C | 17.3°C | 32.2°C | 11.3°C | 163 mm | 81% | 0.5 m/s | 4.9 |
| 2023 | 26.2°C | 21.7°C | 17.2°C | 29.8°C | 12.9°C | 130 mm | 80% | 0.5 m/s | 4.9 |
| 2022 🔥 | 30.4°C | 25.1°C | 19.9°C | 35.3°C | 15.3°C | 61 mm | 70% | 0.4 m/s | 5.5 |
| 2021 | 28.5°C | 23.9°C | 19.3°C | 34.5°C | 14.2°C | 125 mm | 79% | 0.4 m/s | 4.6 |
| 2020 | 29.6°C | 24.3°C | 19.1°C | 33.6°C | 12.7°C | 69 mm | 69% | 0.5 m/s | 5.3 |
| 2019 | 28.3°C | 23.1°C | 17.9°C | 32.8°C | 11.5°C | 99 mm | 73% | 0.4 m/s | 5.5 |
| 2018 | 28.4°C | 24.1°C | 19.8°C | 33.3°C | 14.0°C | 131 mm | 82% | 0.4 m/s | 5.2 |
| 2017 | 27.1°C | 21.9°C | 16.7°C | 33.0°C | 11.6°C | 69 mm | 73% | 0.4 m/s | 5.5 |
| 2016 | 29.6°C | 24.3°C | 19.0°C | 33.3°C | 12.6°C | 94 mm | 71% | 0.4 m/s | 5.9 |
| 2015 | 29.7°C | 24.1°C | 18.6°C | 33.9°C | 14.6°C | 52 mm | 69% | 0.4 m/s | 5.9 |
| 2014 | 27.4°C | 21.8°C | 16.1°C | 32.2°C | 12.6°C | 70 mm | 71% | 0.5 m/s | 5.4 |
| 2013 | 26.5°C | 21.6°C | 16.7°C | 32.1°C | 12.2°C | 82 mm | 75% | 0.5 m/s | 5.2 |
| 2012 | 28.3°C | 23.1°C | 18.0°C | 32.3°C | 12.1°C | 93 mm | 74% | 0.4 m/s | 5.6 |
| 2011 🌧️ | 26.6°C | 22.2°C | 17.7°C | 32.1°C | 12.5°C | 266 mm | 79% | 0.5 m/s | 5.2 |
| 2010 | 28.8°C | 23.3°C | 17.8°C | 34.8°C | 12.8°C | 72 mm | 70% | 0.5 m/s | 5.1 |
| 2009 | 27.1°C | 22.8°C | 18.5°C | 32.0°C | 13.0°C | 55 mm | 81% | 0.4 m/s | 5.2 |
| 2008 | 26.2°C | 21.0°C | 15.8°C | 29.1°C | 10.8°C | 99 mm | 77% | 0.4 m/s | 5.6 |
| 2007 | 28.9°C | 23.2°C | 17.5°C | 35.1°C | 11.7°C | 48 mm | 70% | 0.4 m/s | 5.3 |
| 2006 | 26.4°C | 21.8°C | 17.2°C | 33.2°C | 11.4°C | 142 mm | 77% | 0.5 m/s | 5.2 |
| 2005 | 30.3°C | 24.9°C | 19.6°C | 35.9°C | 14.5°C | 49 mm | 68% | 0.4 m/s | 5 |
| 2004 | 26.5°C | 21.9°C | 17.3°C | 31.1°C | 12.1°C | 129 mm | 79% | 0.4 m/s | 5 |
| 2003 | 27.5°C | 23.1°C | 18.7°C | 31.2°C | 12.5°C | 100 mm | 80% | 0.4 m/s | 5 |
| 2002 | 30.3°C | 24.3°C | 18.3°C | 35.8°C | 13.8°C | 62 mm | 64% | 0.4 m/s | 5.4 |
| 2001 | 29.8°C | 24.3°C | 18.8°C | 38.0°C | 13.7°C | 84 mm | 71% | 0.4 m/s | 5.2 |
| 2000 | 26.0°C | 21.1°C | 16.2°C | 29.9°C | 10.6°C | 77 mm | 79% | 0.4 m/s | 5 |
| 1999 | 28.2°C | 22.7°C | 17.3°C | 35.0°C | 12.6°C | 71 mm | 67% | 0.5 m/s | 5 |
| 1998 | 28.7°C | 23.0°C | 17.4°C | 31.8°C | 11.2°C | 69 mm | 71% | 0.4 m/s | 5.4 |
| 1997 | 26.5°C | 21.2°C | 15.9°C | 31.5°C | 12.5°C | 141 mm | 75% | 0.4 m/s | 5.1 |
| 1996 | 27.3°C | 21.9°C | 16.5°C | 30.9°C | 13.3°C | 61 mm | 76% | 0.4 m/s | 5.4 |
| 1995 | 29.6°C | 23.0°C | 16.5°C | 35.5°C | 11.2°C | 49 mm | 62% | 0.5 m/s | 5.7 |
| 1994 | 26.2°C | 21.0°C | 15.7°C | 32.2°C | 10.5°C | 164 mm | 76% | 0.5 m/s | 5.1 |
| 1993 | 28.9°C | 23.1°C | 17.3°C | 34.9°C | 12.6°C | 55 mm | 70% | 0.4 m/s | 5.3 |
| 1992 | 25.2°C | 20.2°C | 15.2°C | 29.9°C | 9.7°C | 156 mm | 78% | 0.4 m/s | 5.1 |
| 1991 | 27.3°C | 22.3°C | 17.2°C | 32.0°C | 13.4°C | 234 mm | 76% | 0.4 m/s | 5.2 |
| 1990 | 26.5°C | 21.9°C | 17.3°C | 31.8°C | 12.9°C | 171 mm | 80% | 0.4 m/s | 4.7 |
| 1989 | 24.8°C | 20.6°C | 16.3°C | 29.5°C | 9.4°C | 185 mm | 81% | 0.4 m/s | 5.1 |
| 1988 | 28.7°C | 23.4°C | 18.1°C | 33.9°C | 9.8°C | 50 mm | 72% | 0.4 m/s | 5.4 |
| 1987 | 27.1°C | 21.3°C | 15.6°C | 32.5°C | 10.4°C | 108 mm | 69% | 0.5 m/s | 5.1 |
| 1986 | 25.2°C | 20.3°C | 15.3°C | 30.8°C | 6.8°C | 118 mm | 75% | 0.5 m/s | 5 |
| 1985 | 26.7°C | 21.4°C | 16.1°C | 32.9°C | 12.2°C | 138 mm | 73% | 0.4 m/s | 5.1 |
| 1984 | 26.5°C | 21.8°C | 17.0°C | 29.3°C | 10.3°C | 22 mm | 80% | 0.4 m/s | 5.9 |
| 1983 | 28.2°C | 22.4°C | 16.6°C | 33.0°C | 11.0°C | 92 mm | 72% | 0.4 m/s | — |
| 1982 ❄️ | 25.6°C | 20.2°C | 14.8°C | 29.1°C | 6.9°C | 80 mm | 72% | 0.4 m/s | — |
| 1981 | 28.3°C | 22.1°C | 15.9°C | 32.1°C | 11.0°C | 36 mm | 65% | 0.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 27.7°C with lows near 17.3°C (mean 22.5°C), based on 45 years of NASA POWER data.
August averages 99 mm of rainfall in New Britain, about average for rainfall. The wettest on record was 266 mm in 2011.
The hottest August reached 38°C in 2001. The coldest dipped to 6.8°C in 1986.
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 27.1°C to 28.1°C and overnight lows from 16.1°C to 18°C over the same span.
August is one of the warmer months of the year in New Britain and about average for rainfall, so plan for around 27.7°C daytime highs and 17.3°C at night.
Not quite — August is the 11th coolest month in New Britain, averaging 22.5°C.
For August in New Britain, pack light layers you can adjust through the day, with typical highs of 27.7°C and lows of 17.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 74% — moderately humid.
Average wind speed in August is 0.4 m/s. The windiest August on record averaged 0.5 m/s (1986).
The wettest August on record was 2011 with 266 mm. On average, August sees 99 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 New Britain 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.
