Historical weather data, all-time temperature records, and monthly climate averages for Monterey Park, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Monterey Park sits in that pleasant shoulder-season sweet spot, with average highs of 73° and lows around 49°. History keeps things interesting though — this date has swung from a scorching 101° back in 1989 all the way down to a near-freezing 33° in 1921. There's about a 1-in-4 chance of rain today, but don't worry about snow — that's essentially off the table.
Monterey Park's weather has real range hiding behind its mild reputation. The mercury has hit a brutal 115° as recently as September 2020, and once plunged to 21° back in January 1913 — a 94-degree spread between extremes. The wettest single day on record dumped 7.7 inches in March 1938, and yes, 3 inches of snow actually fell here in January 1949.
Summer peaks in late July through early August, when average highs reach 90°, while January is the coolest month at a very manageable 66°. If you're trying to avoid rain, aim for late spring through fall — the wettest stretch of the year clusters around late February, averaging over an inch of precipitation in a single week. Year-round, this is a mild climate, with even the coldest month rarely dipping below the mid-60s during the day.