Historical weather data, all-time temperature records, and monthly climate averages for Sylvania, OH. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Sylvania runs cold, with an average high of just 53° and a low of 33° across 71 years of records. There's a real spread on this date though — it's hit as warm as 77° (1997) and as cold as 14° (1971), so early April here keeps you guessing. A coin-flip chance of precipitation and a 1-in-10 shot at snow round out the classic late-winter-meets-spring vibe.
Sylvania's weather has real range — from a brutal -20° in January 1984 to a sweltering 104° in June 1988, a swing of 124 degrees. The wettest single day on record dumped 4.34 inches on July 4, 1969, while December 1, 1974 buried the area under 13.9 inches of snow in one shot.
Sylvania earns its warmth in July, when average highs peak at 84° during the week of July 16–22 — that's your window for the best summer weather. January is the deep freeze, with highs averaging just 30° in mid-month. Late June into early July is the wettest stretch of the year, averaging nearly an inch of rain per week.