Historical weather data, all-time temperature records, and monthly climate averages for Walnut Park, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Walnut Park typically delivers a mild, pleasant day with an average high of 71° and low of 53° — classic early spring. There's a 15% chance of rain, though snow is essentially unheard of. The date has seen wild swings over the years, from a scorching 105° in 1989 down to a chilly 42° low back in 1921.
Walnut Park is a place of extremes when it wants to be. The all-time high of 113° hit on September 27, 2010, is a reminder of how ferocious late-summer heat events can get, while the record low of 28° on January 7, 1913, shows winters aren't always mild. Even rain has its dramatic moments — a single day in March 1938 dropped 5.88 inches.
Walnut Park runs warm year-round, with monthly average highs ranging from a mild 66° in early January to a peak of 84° in late August — not a huge swing, but enough to matter. If you want the best weather, aim for late summer through fall; if you're rain-sensitive, skip the last week of December, which averages the most precipitation at 0.9 inches.