Climate Insights for Calistoga

The climate in Calistoga is temperate. The average annual temperature is 16°C and approximately 658mm of precipitation falls per year. Gennaio is the wettest month, receiving around 151mm of rainfall. Calistoga is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Luglio, Agosto, Settembre. The coldest months are Dicembre, Febbraio, Gennaio, when temperatures can drop to 5°C.

Temperatures in Calistoga vary considerably across the year, with a 27°C difference between the coldest and warmest months. The warmest month is Luglio, when average highs reach 32°C and the mean temperature sits around 23°C. Dicembre is the coolest month, with minimum temperatures around 5°C and an average of 9°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Calistoga is a relatively dry area, receiving approximately 658mm of precipitation annually, which averages out to around 55mm per month. The wettest month is January, averaging 151mm of rainfall. December and February also tend to see above-average precipitation. The driest month is August, with just 0mm. That's 150mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Calistoga is mildly breezy, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 11km/h in winter, 14km/h in spring, 13km/h in summer, 11km/h in autumn.

It is currently spring in Calistoga, which began on March 20, 2026. Calistoga is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in Luglio at around 32°C, while the coldest stretch bottoms out in Dicembre near 5°C. Summer is next, beginning on June 21, 2026 — 92 days from now.

The best time to visit Calistoga is during Maggio, Giugno, Luglio, Agosto, Settembre and Ottobre, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 10mm per month. By contrast, Dicembre can be quite cold with temperatures dropping to 5°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Calistoga based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.