Climate Insights for Hollister

The climate in Hollister is temperate. The average annual temperature is 14°C and approximately 449mm of precipitation falls per year. January is the wettest month, receiving around 106mm of rainfall. Hollister is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, July. The coldest months are February, December, January, when temperatures can drop to 5°C.

Hollister sees moderate temperature variation throughout the year, ranging from 5°C to 25°C. The warmest month is August, when average highs reach 25°C and the mean temperature sits around 19°C. February is the coolest month, with minimum temperatures around 5°C and an average of 10°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.

Hollister is a relatively dry area, receiving approximately 449mm of precipitation annually, which averages out to around 37mm per month. The wettest month is January, averaging 106mm of rainfall. March and December also tend to see above-average precipitation. The driest month is July, with just 0mm. That's 105mm 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.

Hollister is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

It is currently summer in Hollister, which began on June 21, 2026. Hollister 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 August at around 25°C, while the coldest stretch bottoms out in February near 5°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Hollister is during June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 4mm per month. By contrast, February 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 Hollister 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.