Climate Insights for Ukiah

The climate in Ukiah is temperate. The average annual temperature is 14°C and approximately 1023mm of precipitation falls per year. January is the wettest month, receiving around 205mm of rainfall. Ukiah is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, September. The coldest months are February, December, January, when temperatures can drop to 3°C. Light snow can occur between January and December.

Temperatures in Ukiah vary considerably across the year, with a 28°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 22°C. February is the coolest month, with minimum temperatures around 3°C and an average of 8°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 5°C shift in average temperatures.

Ukiah is a moderately rainy area, receiving approximately 1023mm of precipitation annually, which averages out to around 85mm per month. The wettest month is January, averaging 205mm of rainfall. December and March also tend to see above-average precipitation. The driest month is July, with just 1mm. That's 204mm 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. Light snowfall can occur between January and December, totalling around 32cm annually. March is the snowiest month with approximately 11cm.

Ukiah is relatively calm, with an average annual wind speed of 7km/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 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently summer in Ukiah, which began on June 21, 2026. Ukiah 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 July at around 31°C, while the coldest stretch bottoms out in February near 3°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Ukiah is during June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 16mm per month. By contrast, February can be quite cold with temperatures dropping to 3°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Ukiah 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.