Cool
Average highs are around 12°C, so pack for cooler days.
December verdict
Ukiah, California, United States in December
Weather score17Poor
Poor for holiday weather
Average highs are around 12°C, so pack for cooler days. Sunshine averages 4.8h per day, so this is not one of the brighter months. Rainfall averages 203mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
12°C
Rain
203mm
Sun
4.8h
Sea
12°C
Weather score
17
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 203mm, so showers are a real planning factor.
Limited sun
Sunshine averages 4.8h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 12°C, so the water can feel cool.
Map
Weather map
Compare Ukiah, California, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December12°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
December203mm average rain
December is wetter than Ukiah's yearly average, so flexible plans matter more.
Driest monthsApril to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December4.8 hours average sun
December is one of Ukiah's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December12°C average sea
December is close to Ukiah's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaAugust to December
Sea temperatures are usually near 12°C in this stretch, so swimming comfort is at its strongest.
Weather score
December17 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
