Climate Insights for Barstow Heights

The climate in Barstow Heights is warm and mild. The average annual temperature is 19°C and approximately 131mm of precipitation falls per year. January is the wettest month, receiving around 25mm of rainfall. Barstow Heights is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to 4°C.

Temperatures in Barstow Heights vary considerably across the year, with a 34°C difference between the coldest and warmest months. July is the hottest month, with daytime highs reaching 38°C and an average of 31°C. January is the coolest month, with minimum temperatures around 4°C and an average of 9°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Barstow Heights is a quite dry location, receiving approximately 131mm of precipitation annually, which averages out to around 11mm per month. The wettest month is January, averaging 25mm of rainfall. February and March also tend to see above-average precipitation. The driest month is June, with just 2mm. That's 24mm 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.

Barstow Heights is relatively calm, with an average annual wind speed of 11km/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 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 8km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 9km/h in winter, 14km/h in spring, 12km/h in summer, 9km/h in autumn.

It is currently summer in Barstow Heights, which began on June 21, 2026. Barstow Heights 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 38°C, while the coldest stretch bottoms out in January near 4°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The best time to visit Barstow Heights is during April, May and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 5mm per month. By contrast, July can be uncomfortably hot with highs reaching 38°C, while January is the coldest period with lows dropping to 4°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Barstow Heights 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.