Historical weather data, all-time temperature records, and monthly climate averages for Newark, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Newark sits right in the heart of spring transition — expect a high near 67° and a low around 47°, though history spans a wild range from a 33° freeze in 1945 to a 82° scorcher in 1961. There's an 18% chance of rain today, so light jacket territory, but snow is essentially off the table.
Newark's weather has some real extremes baked into its 115-year record — from a brutal 21° on December 22, 1990, to a sweltering 107° on June 15, 1961, that's an 86-degree spread. The wettest single day on record dropped 4 inches on January 10, 1995, a reminder that Bay Area winters can punch hard when they want to.
Newark runs cool and mild through winter with highs in the upper 50s in January, climbing steadily to a warm peak of 77° through July, August, and September — late summer is your best bet for heat seekers. If you're rain-averse, avoid mid-February, when the wettest stretch of the year averages 0.68 inches per week.