December is one of the cooler months of the year in Visalia, with average highs near 15.8°C and lows around 5.6°C (mean 10.7°C). It is a relatively wet time of year, averaging 71 mm of rainfall and 59% relative humidity across the period.
December is one of the cooler months of the year in Visalia. Across 45 years of records, the warmest December in Visalia was 2023 — when the month averaged 13.8°C — while the coldest was 1990 at 8.3°C. Typical December days reach 15.8°C with nights near 5.6°C. The long-term trend is warming, about 0.3°C per decade.
December is a relatively wet time of year in Visalia, averaging 71 mm of rainfall. The wettest December on record was 2010 with 300 mm, while the driest was 2011 at 0 mm.
Relative humidity in Visalia during December averages 59%. The most humid December was 1983 at 76%, and the least humid was 1989 at 37%.
December receives about 2.2 kWh/m²/day of solar energy in Visalia. The sunniest Decembers were 2011 and 2013 at 2.9 kWh/m²/day, and the cloudiest was 2010 at 1.8.
Average wind speed in Visalia during December is 1.4 m/s. The windiest Decembers were 1992, 1996 and 2004, among others at 1.6 m/s, while the calmest were 2018, 2023 and 2024, among others at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.4°C | 10.4°C | 10.3°C | 10.8°C | 11.8°C | +1.4°C |
| Avg High | 15.7°C | 15.8°C | 15.2°C | 15.9°C | 16.7°C | +1°C |
| Avg Low | 5.2°C | 4.9°C | 5.5°C | 5.7°C | 7.0°C | +1.8°C |
| Avg Rain | 55 mm | 56 mm | 78 mm | 80 mm | 97 mm | +42 mm |
December temperatures in Visalia have risen by about 1.7°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -5.6°C (1990) to a record high of 27.5°C (2021).
Rainfall in December is a relatively wet time of year, averaging 71 mm, with a wettest year of 300 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A quieter season to visit Visalia
If your dates are flexible, the more temperate months of May and October tend to be the most comfortable for visiting Visalia. That said, December — with days averaging 15.8°C and nights around 5.6°C (mean 10.7°C) and moderate rainfall (71 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 17.6°C | 12.8°C | 8.0°C | 22.5°C | 3.9°C | 105 mm | 66% | 1.3 m/s | — |
| 2024 | 18.2°C | 13.2°C | 8.2°C | 23.5°C | 4.5°C | 33 mm | 62% | 1.2 m/s | 2.2 |
| 2023 🔥 | 18.7°C | 13.8°C | 8.9°C | 25.9°C | 5.2°C | 33 mm | 58% | 1.2 m/s | 2.3 |
| 2022 | 13.9°C | 9.8°C | 5.6°C | 21.7°C | 1.6°C | 199 mm | 71% | 1.4 m/s | 1.9 |
| 2021 | 13.9°C | 9.4°C | 4.9°C | 27.5°C | -0.5°C | 180 mm | 69% | 1.5 m/s | 1.9 |
| 2020 | 17.6°C | 12.0°C | 6.5°C | 26.9°C | 2.7°C | 30 mm | 48% | 1.3 m/s | 2.4 |
| 2019 | 15.8°C | 11.3°C | 6.7°C | 21.5°C | 1.9°C | 81 mm | 67% | 1.4 m/s | 2.1 |
| 2018 | 16.3°C | 11.1°C | 6.0°C | 21.0°C | 0.3°C | 23 mm | 62% | 1.2 m/s | 2.1 |
| 2017 | 19.3°C | 13.0°C | 6.7°C | 25.1°C | -0.9°C | 2 mm | 39% | 1.2 m/s | 2.8 |
| 2016 | 14.9°C | 10.0°C | 5.1°C | 21.1°C | -0.9°C | 110 mm | 65% | 1.3 m/s | 2.3 |
| 2015 | 13.6°C | 8.8°C | 4.0°C | 23.3°C | -2.8°C | 89 mm | 65% | 1.3 m/s | 2.3 |
| 2014 | 17.0°C | 12.3°C | 7.5°C | 22.4°C | -0.7°C | 85 mm | 66% | 1.4 m/s | 2.1 |
| 2013 | 17.1°C | 11.3°C | 5.6°C | 24.4°C | -2.3°C | 10 mm | 41% | 1.3 m/s | 2.9 |
| 2012 | 13.9°C | 9.6°C | 5.3°C | 20.3°C | -0.7°C | 99 mm | 68% | 1.4 m/s | 2 |
| 2011 | 16.5°C | 10.3°C | 4.2°C | 20.1°C | 1.4°C | 0 mm | 43% | 1.3 m/s | 2.9 |
| 2010 🌧️ | 14.4°C | 10.4°C | 6.3°C | 22.7°C | -3.6°C | 300 mm | 70% | 1.4 m/s | 1.8 |
| 2009 | 13.8°C | 9.1°C | 4.4°C | 19.8°C | -3.8°C | 94 mm | 62% | 1.4 m/s | 2.2 |
| 2008 | 13.5°C | 8.8°C | 4.1°C | 22.3°C | -2.7°C | 64 mm | 63% | 1.3 m/s | 2.1 |
| 2007 | 13.7°C | 8.6°C | 3.4°C | 23.4°C | -2.4°C | 72 mm | 60% | 1.4 m/s | 2.3 |
| 2006 | 16.0°C | 10.6°C | 5.2°C | 25.6°C | -1.4°C | 46 mm | 52% | 1.3 m/s | 2.4 |
| 2005 | 16.3°C | 11.8°C | 7.4°C | 24.6°C | 1.5°C | 128 mm | 61% | 1.3 m/s | 1.9 |
| 2004 | 16.2°C | 11.2°C | 6.3°C | 25.8°C | 1.0°C | 96 mm | 58% | 1.6 m/s | 2 |
| 2003 | 15.0°C | 10.5°C | 6.1°C | 21.3°C | -0.9°C | 88 mm | 62% | 1.4 m/s | 2 |
| 2002 | 15.1°C | 10.6°C | 6.1°C | 20.7°C | 0.3°C | 87 mm | 68% | 1.5 m/s | 2.2 |
| 2001 | 13.5°C | 9.1°C | 4.7°C | 20.8°C | -0.2°C | 104 mm | 68% | 1.4 m/s | 2 |
| 2000 | 18.4°C | 12.8°C | 7.3°C | 22.6°C | 3.4°C | 3 mm | 48% | 1.2 m/s | 2.3 |
| 1999 | 18.1°C | 12.0°C | 5.9°C | 23.7°C | 0.7°C | 3 mm | 42% | 1.4 m/s | 2.7 |
| 1998 | 14.7°C | 8.9°C | 3.2°C | 27.4°C | -3.4°C | 18 mm | 58% | 1.3 m/s | 2.5 |
| 1997 | 15.4°C | 9.9°C | 4.4°C | 23.2°C | -1.1°C | 57 mm | 57% | 1.5 m/s | 2.1 |
| 1996 | 15.3°C | 11.0°C | 6.7°C | 20.8°C | 1.9°C | 152 mm | 72% | 1.6 m/s | 1.9 |
| 1995 | 17.3°C | 12.1°C | 6.8°C | 24.6°C | 1.3°C | 76 mm | 60% | 1.4 m/s | 2 |
| 1994 | 15.4°C | 10.2°C | 5.0°C | 23.3°C | -0.5°C | 43 mm | 61% | 1.3 m/s | 2.1 |
| 1993 | 16.6°C | 10.9°C | 5.2°C | 22.1°C | 1.8°C | 31 mm | 52% | 1.4 m/s | 2.2 |
| 1992 | 13.8°C | 8.6°C | 3.4°C | 21.1°C | -2.0°C | 110 mm | 62% | 1.6 m/s | 2.2 |
| 1991 | 17.2°C | 11.7°C | 6.2°C | 21.4°C | 0.2°C | 49 mm | 51% | 1.5 m/s | 2.3 |
| 1990 ❄️ | 14.1°C | 8.3°C | 2.5°C | 23.4°C | -5.6°C | 17 mm | 46% | 1.3 m/s | 2.7 |
| 1989 | 19.7°C | 13.3°C | 6.8°C | 23.6°C | 2.7°C | 1 mm | 37% | 1.2 m/s | 2.5 |
| 1988 | 14.8°C | 9.7°C | 4.7°C | 22.8°C | -3.0°C | 78 mm | 59% | 1.4 m/s | 2.1 |
| 1987 | 13.5°C | 8.4°C | 3.3°C | 21.8°C | -4.3°C | 60 mm | 60% | 1.6 m/s | 2.1 |
| 1986 | 17.7°C | 12.1°C | 6.5°C | 24.4°C | 3.3°C | 18 mm | 48% | 1.3 m/s | 2 |
| 1985 | 17.0°C | 11.8°C | 6.6°C | 23.7°C | -1.4°C | 40 mm | 57% | 1.3 m/s | 2 |
| 1984 | 13.8°C | 8.7°C | 3.6°C | 21.7°C | -1.8°C | 54 mm | 66% | 1.4 m/s | 2 |
| 1983 | 13.8°C | 9.5°C | 5.3°C | 20.2°C | -0.7°C | 114 mm | 76% | 1.4 m/s | — |
| 1982 | 14.1°C | 9.0°C | 3.9°C | 20.5°C | -1.5°C | 81 mm | 68% | 1.3 m/s | — |
| 1981 | 16.8°C | 11.5°C | 6.3°C | 23.6°C | 1.1°C | 45 mm | 65% | 1.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 15.8°C with lows near 5.6°C (mean 10.7°C), based on 45 years of NASA POWER data.
December averages 71 mm of rainfall in Visalia, a relatively wet time of year. The wettest on record was 300 mm in 2010.
The hottest December reached 27.5°C in 2021. The coldest dipped to -5.6°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.7°C. Daytime highs moved from 15.1°C to 16.5°C and overnight lows from 5.1°C to 7.1°C over the same span.
December is one of the cooler months of the year in Visalia and a relatively wet time of year, so plan for around 15.8°C daytime highs and 5.6°C at night.
Yes — December is the coldest month of the year in Visalia, averaging 10.7°C.
For December in Visalia, pack warm layers and a jacket for chilly mornings, with typical highs of 15.8°C and lows of 5.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 59% — moderately humid.
Average wind speed in December is 1.4 m/s. The windiest December on record averaged 1.6 m/s (1987).
The wettest December on record was 2010 with 300 mm. On average, December sees 71 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 Visalia 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.
