Historical weather data, all-time temperature records, and monthly climate averages for Brunswick, OH. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Brunswick runs cool, with an average high of 54° and low of 34° across 87 years of data. It's a genuinely unpredictable date — the mercury has swung from a frigid 19° in 1971 to a pleasant 74° in 1974. There's also a coin-flip chance of precipitation today, with a 1-in-8 shot it comes down as snow.
Brunswick's weather has real extremes baked into its history — a scorching 104° in June 1988 and a brutal -20° in January 1994 represent a 124-degree swing between the all-time highs and lows. A single September day in 1996 dumped 4.59 inches of rain, and a February 1993 storm buried the area under 13.6 inches of snow in 24 hours.
Summer is the sweet spot, with the warmest week of the year (July 16–22) averaging a high of 84° — but June is when you'll want an umbrella, averaging nearly an inch of rain in its wettest week. Winters are genuinely cold; January highs hover around 33–34°, and the coolest stretch of the year lands mid-January. Spring and fall offer mild transitions, with April climbing to a 59° average high and October holding at a comfortable 63°.