Historical weather data, all-time temperature records, and monthly climate averages for Newcastle, WA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Newcastle runs cool and damp — expect a high around 57° and a better-than-even chance of rain. The date's range is surprisingly tight: the warmest it's ever gotten was 72° back in 2007, and even the record cold low of 33° in 1955 never dipped to freezing.
Newcastle's weather has real teeth on both ends — the thermometer has swung from a brutal 3° in January 1950 all the way up to 105° in July 2009. A single October day in 2003 dropped over four inches of rain, and a January snowstorm that same winter buried the area under 7.8 inches.
Summer is the clear window here, with highs peaking around 77–78° in mid-July before a gradual slide into fall. By mid-January, average highs bottom out at 46°. Rain season hits hardest in late November, when weekly totals average over an inch and a half.