December is one of the cooler months of the year in Clearwater, with average highs near 21.8°C and lows around 13.1°C (mean 17.5°C). It is one of the drier months, averaging 62 mm of rainfall and 80% relative humidity across the period.
December is one of the cooler months of the year in Clearwater. Across 45 years of records, the warmest December in Clearwater was 2015 — when the month averaged 21.7°C — while the coldest was 2010 at 12.1°C. Typical December days reach 21.8°C with nights near 13.1°C. The long-term trend is warming, about 0.4°C per decade.
December is one of the drier months in Clearwater, averaging 62 mm of rainfall. The wettest December on record was 1997 with 311 mm, while the driest was 1984 at 6 mm.
Relative humidity in Clearwater during December averages 80%. The most humid December was 1983 at 87%, and the least humid was 2010 at 69%.
December receives about 3.2 kWh/m²/day of solar energy in Clearwater. The sunniest December was 2010 at 3.7 kWh/m²/day, and the cloudiest were 1986 and 2009 at 2.7.
Average wind speed in Clearwater during December is 3 m/s. The windiest Decembers were 2000, 2010 and 2023, among others at 3.5 m/s, while the calmest was 2021 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.7°C | 17.5°C | 17.1°C | 18.2°C | 17.8°C | +1.1°C |
| Avg High | 20.8°C | 21.9°C | 21.5°C | 22.7°C | 22.4°C | +1.6°C |
| Avg Low | 12.6°C | 13.2°C | 12.6°C | 13.7°C | 13.3°C | +0.7°C |
| Avg Rain | 69 mm | 64 mm | 74 mm | 53 mm | 46 mm | -22 mm |
December temperatures in Clearwater have risen by about 1.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -3.1°C (1983) to a record high of 28.4°C (2016).
Rainfall in December is one of the drier months, averaging 62 mm, with a wettest year of 311 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.5°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
A good time to visit Clearwater
December is a good time to visit Clearwater, with days averaging 21.8°C and nights around 13.1°C (mean 17.5°C, cooler than Clearwater's yearly average) and moderate rainfall. April and November are marginally more temperate, but December still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23.8°C | 18.9°C | 14.1°C | 27.4°C | 5.3°C | 39 mm | 78% | 2.7 m/s | — |
| 2024 | 22.4°C | 17.5°C | 12.6°C | 27.3°C | 5.0°C | 20 mm | 79% | 3 m/s | 3.5 |
| 2023 | 21.6°C | 17.7°C | 13.9°C | 27.6°C | 7.3°C | 94 mm | 80% | 3.5 m/s | 3 |
| 2022 | 21.4°C | 17.1°C | 12.8°C | 26.2°C | 0.9°C | 52 mm | 81% | 2.7 m/s | 3.1 |
| 2021 | 24.7°C | 20.3°C | 15.9°C | 27.5°C | 8.6°C | 21 mm | 84% | 2.1 m/s | 3.6 |
| 2020 | 20.3°C | 15.5°C | 10.7°C | 25.3°C | 3.0°C | 53 mm | 78% | 3.1 m/s | 3.5 |
| 2019 | 23.1°C | 18.9°C | 14.6°C | 26.9°C | 7.0°C | 92 mm | 81% | 3.4 m/s | 3 |
| 2018 | 21.4°C | 17.5°C | 13.6°C | 27.0°C | 6.1°C | 188 mm | 82% | 3.2 m/s | 3.2 |
| 2017 | 22.9°C | 18.4°C | 13.8°C | 26.4°C | 6.1°C | 32 mm | 81% | 2.5 m/s | 3.5 |
| 2016 | 25.0°C | 20.3°C | 15.6°C | 28.4°C | 7.1°C | 20 mm | 77% | 2.9 m/s | 3.6 |
| 2015 🔥 | 25.6°C | 21.7°C | 17.7°C | 28.0°C | 8.3°C | 29 mm | 85% | 3 m/s | 3.2 |
| 2014 | 21.2°C | 17.4°C | 13.6°C | 25.4°C | 6.8°C | 51 mm | 86% | 2.5 m/s | 3.2 |
| 2013 | 24.0°C | 19.4°C | 14.7°C | 27.4°C | 7.9°C | 27 mm | 79% | 2.9 m/s | 3.2 |
| 2012 | 22.7°C | 17.8°C | 13.0°C | 25.8°C | 5.0°C | 63 mm | 80% | 2.8 m/s | 3.3 |
| 2011 | 23.7°C | 18.8°C | 14.0°C | 26.6°C | 6.5°C | 12 mm | 79% | 3 m/s | 3.6 |
| 2010 ❄️ | 17.3°C | 12.1°C | 6.9°C | 24.3°C | 0.8°C | 19 mm | 69% | 3.5 m/s | 3.7 |
| 2009 | 20.7°C | 16.9°C | 13.0°C | 26.4°C | 4.4°C | 105 mm | 83% | 3.4 m/s | 2.7 |
| 2008 | 22.8°C | 18.1°C | 13.3°C | 26.4°C | 4.9°C | 30 mm | 77% | 2.8 m/s | 3.6 |
| 2007 | 24.5°C | 19.8°C | 15.1°C | 27.6°C | 5.6°C | 52 mm | 79% | 2.6 m/s | 3.5 |
| 2006 | 23.8°C | 19.5°C | 15.3°C | 27.1°C | 7.2°C | 82 mm | 80% | 3.2 m/s | 2.9 |
| 2005 | 19.8°C | 15.5°C | 11.2°C | 24.3°C | 5.3°C | 61 mm | 78% | 3.2 m/s | 3.2 |
| 2004 | 20.1°C | 15.7°C | 11.3°C | 26.0°C | 2.8°C | 51 mm | 81% | 3.4 m/s | 3.1 |
| 2003 | 19.8°C | 15.0°C | 10.2°C | 24.9°C | 2.6°C | 47 mm | 79% | 3.2 m/s | 3.5 |
| 2002 | 19.3°C | 14.9°C | 10.6°C | 24.5°C | 5.9°C | 264 mm | 83% | 3.3 m/s | 3.2 |
| 2001 | 23.2°C | 19.4°C | 15.5°C | 27.4°C | 7.4°C | 25 mm | 80% | 2.8 m/s | 3.3 |
| 2000 | 20.9°C | 15.9°C | 10.9°C | 28.2°C | 1.3°C | 21 mm | 73% | 3.5 m/s | 3.3 |
| 1999 | 21.7°C | 17.2°C | 12.7°C | 26.2°C | 3.3°C | 43 mm | 77% | 3 m/s | 3.2 |
| 1998 | 24.4°C | 20.0°C | 15.6°C | 27.5°C | 7.4°C | 25 mm | 79% | 2.7 m/s | 3.3 |
| 1997 🌧️ | 19.6°C | 16.2°C | 12.9°C | 25.1°C | 5.4°C | 311 mm | 86% | 3.3 m/s | 2.8 |
| 1996 | 22.4°C | 17.6°C | 12.8°C | 27.0°C | 1.8°C | 59 mm | 76% | 3.1 m/s | 3.2 |
| 1995 | 20.1°C | 15.7°C | 11.4°C | 25.1°C | 2.3°C | 52 mm | 81% | 3.1 m/s | 3.2 |
| 1994 | 21.7°C | 17.9°C | 14.2°C | 26.5°C | 8.0°C | 54 mm | 87% | 3.1 m/s | 3 |
| 1993 | 20.2°C | 15.5°C | 10.8°C | 26.0°C | 5.1°C | 37 mm | 73% | 3.4 m/s | 3.3 |
| 1992 | 21.7°C | 17.5°C | 13.3°C | 24.9°C | 6.1°C | 17 mm | 86% | 2.9 m/s | 3.1 |
| 1991 | 22.8°C | 18.4°C | 13.9°C | 28.0°C | 5.8°C | 18 mm | 76% | 3 m/s | 3.3 |
| 1990 | 23.9°C | 19.2°C | 14.4°C | 27.6°C | 6.9°C | 23 mm | 75% | 2.9 m/s | 3.3 |
| 1989 | 17.9°C | 13.5°C | 9.1°C | 24.2°C | -2.3°C | 107 mm | 79% | 3.1 m/s | 3 |
| 1988 | 20.3°C | 15.9°C | 11.6°C | 24.2°C | 2.8°C | 32 mm | 84% | 2.7 m/s | 3.4 |
| 1987 | 21.7°C | 17.5°C | 13.4°C | 25.7°C | 4.2°C | 14 mm | 79% | 3 m/s | 3.1 |
| 1986 | 22.4°C | 18.8°C | 15.2°C | 27.1°C | 10.0°C | 78 mm | 81% | 3.5 m/s | 2.7 |
| 1985 | 19.5°C | 14.9°C | 10.4°C | 25.8°C | -0.8°C | 39 mm | 73% | 3.3 m/s | 3.1 |
| 1984 | 24.0°C | 19.5°C | 14.9°C | 27.1°C | 4.3°C | 6 mm | 77% | 2.5 m/s | 3.1 |
| 1983 | 19.2°C | 15.5°C | 11.8°C | 25.6°C | -3.1°C | 170 mm | 87% | 3.5 m/s | — |
| 1982 | 22.2°C | 18.5°C | 14.9°C | 26.5°C | 4.8°C | 45 mm | 84% | 3.5 m/s | — |
| 1981 | 20.3°C | 16.0°C | 11.8°C | 26.5°C | 1.4°C | 126 mm | 75% | 3.3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 21.8°C with lows near 13.1°C (mean 17.5°C), based on 45 years of NASA POWER data.
December averages 62 mm of rainfall in Clearwater, one of the drier months. The wettest on record was 311 mm in 1997.
The hottest December reached 28.4°C in 2016. The coldest dipped to -3.1°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.4°C. Daytime highs moved from 21°C to 22.8°C and overnight lows from 12.8°C to 13.9°C over the same span.
December is one of the cooler months of the year in Clearwater and one of the drier months, so plan for around 21.8°C daytime highs and 13.1°C at night.
Not quite — December is the 3rd coolest month in Clearwater, averaging 17.5°C.
For December in Clearwater, pack light layers you can adjust through the day, with typical highs of 21.8°C and lows of 13.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 80% — quite humid.
Average wind speed in December is 3 m/s. The windiest December on record averaged 3.5 m/s (1982).
The wettest December on record was 1997 with 311 mm. On average, December sees 62 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 Clearwater 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.
