Sylvania climate — normals and trends
Sylvania (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.9 °C and it receives 882 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (22.9 °C on average) and the coldest is January (-3.9 °C). Rainfall peaks in May.
Sylvania averages 117 frost days, 24 hot days (≥ 30 °C) and 120 rainy days per year.
Sylvania has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 132 to 102 per year over the period.
The hottest day of the period reached 40.9 °C (on 25 June 1988) and the coldest -30.0 °C (on 19 January 1994).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
SylvaniaOhio
- coords
- 41.72°, -83.71°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.9°C
Average daily high
14.6°C
Average daily low
5.4°C
Annual rainfall
882mm
Sunshine / day
8.6h
Mean relative humidity
71%
Average peak wind
20.7km/h
Seasonal range
26.8°C
Frost days (< 0 °C)
117 d/yr
Hot days (≥ 30 °C)
24 d/yr
Rainy days (≥ 1 mm)
120 d/yr
Annual snowfall
71.0 cm
Average feels-like high
12.4 °C
Average feels-like low
2.4 °C
Average peak gust
39.1 km/h
Tropical nights (≥ 20 °C)
23 d/yr
Solar radiation
14.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.38 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
40.9 °C
25 June 1988
Coldest day
-30.0 °C
19 January 1994
Wettest day
77 mm
30 August 1975
Windiest day
57.8 km/h
15 March 1959
Strongest gust
108.4 km/h
10 November 1998
Hottest feels-like
43.8 °C
14 July 1995
Coldest feels-like
-37.2 °C
19 January 1994
Snowiest day
32.8 cm
1 December 1974
Sunniest day
14.9 h
11 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -1.2 °C | -0.9 °C | 41 mm | -19 mm |
| Feb | 0.9 °C | -0.3 °C | 45 mm | -11 mm |
| Mar | 12.7 °C | +5.5 °C | 64 mm | -13 mm |
| Apr | 15.9 °C | +1.6 °C | 107 mm | +16 mm |
| May | 19.0 °C | -1.6 °C | 118 mm | +23 mm |
| Jun | 27.1 °C | +1.3 °C | 90 mm | +2 mm |
| Jul | 29.3 °C | +1.4 °C | 113 mm | +36 mm |
| Aug | 26.5 °C | -0.6 °C | 35 mm | -39 mm |
| Sep | 25.6 °C | +2.2 °C | 38 mm | -24 mm |
| Oct | 19.1 °C | +2.2 °C | 68 mm | +5 mm |
| Nov | 9.1 °C | 0.0 °C | 53 mm | -18 mm |
| Dec | 2.1 °C | -0.3 °C | 68 mm | +2 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Sylvania?
Sylvania has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.9 °C and it receives 882 mm of precipitation per year.
What is the hottest day ever recorded in Sylvania?
The hottest day measured in Sylvania between 1940 and 2025 was 25 June 1988, reaching 40.9 °C.
What is the coldest day in Sylvania?
The coldest day measured in Sylvania between 1940 and 2025 was 19 January 1994, at -30.0 °C.
Does it snow in Sylvania?
Yes. Sylvania gets on average 71.0 cm of snow per year and has around 117 frost days.
Has the climate of Sylvania warmed?
Yes: Sylvania warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sylvania?
The wettest day measured in Sylvania between 1940 and 2025 was 30 August 1975, with 77 mm of rain in 24 hours.
What was the windiest day in Sylvania?
The windiest day measured in Sylvania between 1940 and 2025 was 15 March 1959, with winds reaching 57.8 km/h.
What is the warmest month in Sylvania?
The warmest month in Sylvania is July (22.9 °C on average); the coldest is January (-3.9 °C).
How much does it rain in Sylvania?
Sylvania receives on average 882 mm of precipitation per year, spread over about 120 rainy days.
Is it sunny in Sylvania?
Sylvania gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sylvania?
The heaviest 24-hour snowfall measured in Sylvania between 1940 and 2025 was 1 December 1974, with 32.8 cm.
Are there tropical nights in Sylvania?
Yes: Sylvania has on average 23 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sylvania?
In Sylvania, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 14 July 1995, and the lowest was -37.2 °C on 19 January 1994.
Compare Sylvania with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sylvania