Historical weather data, all-time temperature records, and monthly climate averages for Bloomington, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Bloomington lands right in the sweet spot of spring — average highs of 74° with almost no chance of rain (17%) and zero chance of snow. The date has seen some wild swings over the years, from a toasty 93° in 1961 down to a chilly 37° low back in 1956.
Bloomington plays in the extremes — this inland Southern California spot has baked to 113° (September 1955) and frozen to 20° (January 1949), a 93-degree spread that tells you this is no mild coastal town. Its wettest single day on record dumped 4.03 inches in January 1956, and yes, it has actually snowed here — 6.5 inches on January 11, 1949.
Summers here are genuinely hot, with peak highs averaging 95° in mid-July and the heat holding strong through September at 91°. Winters are mild by most standards but real enough, with January highs only reaching the low 60s. If you're chasing rain, late January is your window — the wettest week of the year averages just under an inch of precipitation.