December is one of the cooler months of the year in Niwari, with average highs near 25.5°C and lows around 10.4°C (mean 18°C). It is one of the drier months, averaging 6 mm of rainfall and 49% relative humidity across the period.
December is one of the cooler months of the year in Niwari. Across 45 years of records, the warmest Decembers in Niwari were 1988 and 2002 — when the month averaged 20.1°C — while the coldest was 2019 at 14.9°C. Typical December days reach 25.5°C with nights near 10.4°C. The long-term trend is cooling, about 0.3°C per decade.
December is one of the drier months in Niwari, averaging 6 mm of rainfall. The wettest December on record was 1997 with 63 mm, while the driest were 2016, 2018 and 2025, among others at 0 mm.
Relative humidity in Niwari during December averages 49%. The most humid December was 2019 at 77%, and the least humid was 2000 at 20%.
December receives about 4.1 kWh/m²/day of solar energy in Niwari. The sunniest December was 1999 at 4.7 kWh/m²/day, and the cloudiest was 1997 at 3.
Average wind speed in Niwari during December is 1.4 m/s. The windiest December was 1986 at 1.7 m/s, while the calmest were 2008 and 2022 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.0°C | 17.9°C | 19.3°C | 17.4°C | 16.8°C | -1.2°C |
| Avg High | 25.7°C | 25.6°C | 27.1°C | 24.7°C | 23.5°C | -2.2°C |
| Avg Low | 10.3°C | 10.2°C | 11.4°C | 10.0°C | 10.1°C | -0.2°C |
| Avg Rain | 5 mm | 8 mm | 3 mm | 8 mm | 8 mm | +3 mm |
December temperatures in Niwari have fallen by about 0.8°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 2°C (2019) to a record high of 31.6°C (2002).
Rainfall in December is one of the drier months, averaging 6 mm, with a wettest year of 63 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.5°C per decade while lows rose 0°C per decade, narrowing the gap between day and night.
One of the best times to visit Niwari
December is one of the best times to visit Niwari. Expect days averaging 25.5°C and nights around 10.4°C (mean 18°C) — cooler than Niwari's yearly average — with low rainfall (6 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 | 22.7°C | 15.6°C | 8.5°C | 24.6°C | 5.7°C | 0 mm | 69% | 1.3 m/s | — |
| 2024 | 22.3°C | 15.9°C | 9.5°C | 26.4°C | 4.9°C | 16 mm | 66% | 1.3 m/s | 3.7 |
| 2023 | 24.2°C | 17.7°C | 11.3°C | 27.1°C | 8.3°C | 13 mm | 63% | 1.3 m/s | 3.4 |
| 2022 | 23.2°C | 16.9°C | 10.5°C | 26.8°C | 7.4°C | 2 mm | 65% | 1.2 m/s | 4 |
| 2021 | 23.4°C | 16.8°C | 10.2°C | 26.9°C | 4.2°C | 7 mm | 63% | 1.4 m/s | 3.5 |
| 2020 | 25.1°C | 17.9°C | 10.7°C | 30.7°C | 4.3°C | 6 mm | 50% | 1.3 m/s | 3.7 |
| 2019 ❄️ | 20.5°C | 14.9°C | 9.3°C | 24.9°C | 2.0°C | 13 mm | 77% | 1.3 m/s | 3.2 |
| 2018 | 24.2°C | 16.5°C | 8.7°C | 26.4°C | 3.5°C | 0 mm | 53% | 1.3 m/s | 4.1 |
| 2017 | 27.1°C | 19.7°C | 12.2°C | 29.5°C | 9.0°C | 1 mm | 32% | 1.3 m/s | 3.8 |
| 2016 | 26.0°C | 18.0°C | 10.0°C | 27.8°C | 7.2°C | 0 mm | 49% | 1.4 m/s | 4.1 |
| 2015 | 26.6°C | 18.6°C | 10.6°C | 31.2°C | 5.5°C | 3 mm | 36% | 1.4 m/s | 4.1 |
| 2014 | 23.8°C | 16.5°C | 9.2°C | 29.3°C | 4.2°C | 41 mm | 48% | 1.4 m/s | 3.8 |
| 2013 | 24.2°C | 17.2°C | 10.2°C | 27.4°C | 6.9°C | 15 mm | 60% | 1.3 m/s | 3.8 |
| 2012 | 26.3°C | 18.3°C | 10.3°C | 29.3°C | 5.6°C | 0 mm | 48% | 1.4 m/s | 4.2 |
| 2011 | 25.0°C | 17.4°C | 9.8°C | 29.6°C | 6.2°C | 3 mm | 56% | 1.3 m/s | 4.1 |
| 2010 | 23.6°C | 16.4°C | 9.2°C | 26.7°C | 6.6°C | 1 mm | 60% | 1.3 m/s | 4.1 |
| 2009 | 26.4°C | 19.3°C | 12.1°C | 29.3°C | 7.7°C | 12 mm | 60% | 1.3 m/s | 3.9 |
| 2008 | 26.6°C | 19.5°C | 12.3°C | 28.6°C | 8.2°C | 0 mm | 59% | 1.2 m/s | 4 |
| 2007 | 27.0°C | 19.3°C | 11.6°C | 30.4°C | 7.7°C | 4 mm | 39% | 1.4 m/s | 3.9 |
| 2006 | 27.5°C | 19.9°C | 12.4°C | 31.4°C | 9.0°C | 0 mm | 43% | 1.4 m/s | 4 |
| 2005 | 26.5°C | 18.3°C | 10.0°C | 29.0°C | 7.7°C | 1 mm | 37% | 1.4 m/s | 4.2 |
| 2004 | 26.6°C | 18.8°C | 11.1°C | 30.5°C | 6.7°C | 2 mm | 46% | 1.3 m/s | 4.2 |
| 2003 | 25.6°C | 18.2°C | 10.8°C | 29.5°C | 6.4°C | 9 mm | 64% | 1.5 m/s | 4 |
| 2002 | 28.3°C | 20.1°C | 11.9°C | 31.6°C | 9.1°C | 5 mm | 38% | 1.5 m/s | 4.1 |
| 2001 | 27.8°C | 19.4°C | 10.9°C | 31.5°C | 7.3°C | 0 mm | 33% | 1.3 m/s | 4.3 |
| 2000 | 28.5°C | 19.8°C | 11.0°C | 31.4°C | 8.5°C | 1 mm | 20% | 1.5 m/s | 4.4 |
| 1999 | 25.7°C | 17.4°C | 9.1°C | 27.5°C | 6.5°C | 0 mm | 42% | 1.3 m/s | 4.7 |
| 1998 | 27.4°C | 18.9°C | 10.3°C | 30.7°C | 7.4°C | 0 mm | 33% | 1.4 m/s | 4.5 |
| 1997 🌧️ | 21.4°C | 15.8°C | 10.3°C | 25.5°C | 5.4°C | 63 mm | 77% | 1.4 m/s | 3 |
| 1996 | 24.7°C | 16.9°C | 9.1°C | 27.1°C | 4.3°C | 0 mm | 40% | 1.3 m/s | 4.3 |
| 1995 | 25.7°C | 18.5°C | 11.3°C | 28.8°C | 7.6°C | 9 mm | 52% | 1.4 m/s | 4 |
| 1994 | 27.0°C | 18.4°C | 9.9°C | 30.6°C | 5.0°C | 0 mm | 29% | 1.4 m/s | 4.6 |
| 1993 | 26.5°C | 18.2°C | 9.9°C | 29.8°C | 6.6°C | 0 mm | 37% | 1.3 m/s | 4.4 |
| 1992 | 25.8°C | 18.1°C | 10.5°C | 28.1°C | 8.0°C | 0 mm | 47% | 1.3 m/s | 4.6 |
| 1991 | 26.6°C | 18.7°C | 10.9°C | 29.6°C | 5.1°C | 9 mm | 42% | 1.5 m/s | 4.3 |
| 1990 | 24.8°C | 17.8°C | 10.8°C | 26.8°C | 7.6°C | 0 mm | 58% | 1.4 m/s | 4.2 |
| 1989 | 27.2°C | 18.8°C | 10.4°C | 30.0°C | 7.3°C | 7 mm | 31% | 1.5 m/s | 4.2 |
| 1988 🔥 | 28.2°C | 20.1°C | 12.1°C | 31.2°C | 8.4°C | 1 mm | 27% | 1.6 m/s | 4.3 |
| 1987 | 26.7°C | 18.2°C | 9.8°C | 31.4°C | 7.4°C | 8 mm | 39% | 1.4 m/s | 4.5 |
| 1986 | 26.1°C | 18.0°C | 9.9°C | 30.1°C | 5.8°C | 3 mm | 31% | 1.7 m/s | 4.3 |
| 1985 | 23.3°C | 16.9°C | 10.4°C | 27.2°C | 5.0°C | 0 mm | 64% | 1.3 m/s | 4.5 |
| 1984 | 26.8°C | 18.3°C | 9.7°C | 30.5°C | 5.8°C | 2 mm | 36% | 1.5 m/s | 4.6 |
| 1983 | 23.3°C | 16.8°C | 10.2°C | 27.4°C | 5.4°C | 3 mm | 58% | 1.4 m/s | — |
| 1982 | 24.8°C | 17.7°C | 10.7°C | 28.0°C | 5.8°C | 5 mm | 57% | 1.4 m/s | — |
| 1981 | 24.8°C | 17.2°C | 9.5°C | 28.2°C | 5.8°C | 12 mm | 53% | 1.5 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 25.5°C with lows near 10.4°C (mean 18°C), based on 45 years of NASA POWER data.
December averages 6 mm of rainfall in Niwari, one of the drier months. The wettest on record was 63 mm in 1997.
The hottest December reached 31.6°C in 2002. The coldest dipped to 2°C in 2019.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have fallen by about 0.8°C. Daytime highs moved from 24.6°C to 23.2°C and overnight lows from 10.1°C to 10°C over the same span.
December is one of the cooler months of the year in Niwari and one of the drier months, so plan for around 25.5°C daytime highs and 10.4°C at night.
Not quite — December is the 2nd coolest month in Niwari, averaging 18°C.
For December in Niwari, pack light layers you can adjust through the day, with typical highs of 25.5°C and lows of 10.4°C.
Relative humidity in December averages 49% — relatively dry.
Average wind speed in December is 1.4 m/s. The windiest December on record averaged 1.7 m/s (1986).
The wettest December on record was 1997 with 63 mm. On average, December sees 6 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 Niwari behaves each December, 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 December specifically, along with year-by-year records and how the month has changed over the decades.
