Historical weather data, all-time temperature records, and monthly climate averages for Westfield, NJ. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Westfield runs cool, with an average high of 57° and low of 35° across 94 years of records. The date has seen wild swings though — a balmy 82° back in 1950 and a brutal 21° in 1932. There's a 38% chance of rain today, but snow is essentially off the table.
Westfield has seen genuine extremes over its 95-year record — from a scorching 107° on July 7, 2010 to a bone-chilling -26° on February 9, 1934, a spread of 133 degrees. A single storm dropped 8.76 inches of rain on August 28, 1971, and a January 1961 snowstorm buried the town under 20 inches in one day.
Westfield hits its peak in mid-to-late July, with average highs reaching 87° the week of July 16–22 — and that's also when the heaviest rain tends to fall. Winter bottoms out in the third week of January, when highs average just 38°. Spring and fall offer a smooth ramp between those extremes, with pleasant 60s in April and October.