Historical weather data, all-time temperature records, and monthly climate averages for Lemon Grove, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Lemon Grove is a comfortable spring day on average, with highs around 74° and lows near 50°. But the date has some wild cards in its history — temps have swung from a 39° low in 1999 all the way to a scorching 102° high back in 1989. Rain is unlikely, with only a 16% historical chance of any precipitation.
Lemon Grove's all-time records tell the story of a place that can genuinely surprise you. The mercury hit 114° on September 5, 2020, and bottomed out at 25° on Christmas Day 1987 — a 89-degree spread between the extremes. The wettest single day on record dropped 3.8 inches on December 22, 2010.
Lemon Grove stays remarkably mild year-round, with monthly average highs ranging from just 69° in December to 91° during the warmest week of the year in early September. If you're chasing heat, late summer is your window; if you prefer sweater weather, the last week of December is about as cool as it gets. Wet days are rare but most likely in late February through early March, averaging under an inch per week even at the peak.