Historical weather data, all-time temperature records, and monthly climate averages for Baton Rouge, LA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Baton Rouge typically feels like a genuine spring day, with average highs of 77° and lows around 55°. There's a 28% chance of rain, though snow is essentially off the table — though 1987 did manage to scrape a freezing low on this exact date. On the warmer end, 2023 pushed things all the way to 90°.
Baton Rouge plays in extremes: the mercury has swung from a brutal 7° in January 2025 to a scorching 106° in August 2023, a range of 99 degrees. The city also saw a jaw-dropping 11.99 inches of rain in a single day back in April 1967, and that same January 2025 cold snap buried the area under 7.6 inches of snow — rare for this deep-South city.
Baton Rouge runs hot for a long stretch, with highs in the low 90s from June through August and peaking during the week of July 2–8 at an average 92°. If you're looking for cooler weather, January is your window — but even then, expect highs around 61°. Rainfall is spread throughout the year, but mid-July is the wettest stretch, averaging 1.6 inches in a single week.