Historical weather data, all-time temperature records, and monthly climate averages for Lancaster, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Lancaster sits right in the sweet spot of spring, with average highs of 69° and lows of 43°. There's a wide range of what this date can throw at you, though — it's hit as high as 89° (2021) and dipped to a freezing 31° (2009). Rain is unlikely, with just a 10% chance of any precipitation.
Lancaster plays for keeps when it comes to extremes — the Mojave Desert floor has baked to 115° in June and plunged to a brutal 2° on Christmas Eve 1984. That same December brought 12 inches of snow in a single day, a reminder that this high desert city isn't shy about surprises on either end of the thermometer.
Lancaster runs hot and dry, with peak summer highs averaging 99° in late July and a mild but cool winter hovering around 56° in early January. Spring and fall offer the most comfortable windows for visitors, with April through May and September through October hitting the 73°–90° range. If you're rain-averse, avoid late December — it's the wettest stretch of the year, though even then you're only looking at about half an inch per week.