Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
September verdict
Calistoga, California, United States in September
Weather score67Good
Good for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 9.5h per day, so bright days are a strong part of the month. Rainfall averages 13mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
28°C
Rain
13mm
Sun
9.5h
Sea
13°C
Weather score
67
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 13mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.5h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 13°C, so the water can feel cool.
Map
Weather map
Compare Calistoga, California, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September28°C average high
September is one of Calistoga's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September13mm average rain
September is one of Calistoga's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsApril to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September9.5 hours average sun
September is brighter than Calistoga's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September13°C average sea
September is one of Calistoga's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJanuary and August to December
Sea temperatures are usually near 12°C in this stretch, so swimming comfort is at its strongest.
Weather score
September67 weather score
September scores above Calistoga's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsMay to September
These months have the strongest weather score in the monthly averages.
