Sylvan, IL
Unincorporated community in Cass County, Illinois
Sylvan is a small unincorporated community in Cass County, Illinois. It is 6.0 miles NW of Chandlerville, the nearest town. Its ZIP code is 62627.
Sylvan at a glance
- State
- Illinois
- County
- Cass County
- ZIP code
- 62627
- Nearest town
- Chandlerville (6.0 mi)
- Time zone
- America/Chicago
- Coordinates
- 39.9850, -90.0711
Weather in Sylvan now
Loading the National Weather Service forecast…
Sylvan weather by the hour
Sylvan weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Sylvan.
This week in Sylvan
Sunrise, sunset and moon in Sylvan
What is the weather usually like in Sylvan?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 85°F average high
- Januarycoldest month · 17°F average low
- 37.7 inprecipitation per year · 956 mm
- 15.2 insnowfall per year · 39 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Sylvan: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station PETERSBURG 1E, IL US (USC00116765), adjusted for the elevation of Sylvan.
Sylvan weather month by month
Sunrise and sunset in Sylvan through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:18 AM | 5:01 PM | 9 h 42 min |
| February | 6:51 AM | 5:37 PM | 10 h 46 min |
| March | 7:09 AM | 7:08 PM | 11 h 58 min |
| April | 6:20 AM | 7:40 PM | 13 h 19 min |
| May | 5:43 AM | 8:10 PM | 14 h 26 min |
| June | 5:29 AM | 8:32 PM | 15 h 3 min |
| July | 5:42 AM | 8:29 PM | 14 h 46 min |
| August | 6:10 AM | 7:58 PM | 13 h 47 min |
| September | 6:40 AM | 7:10 PM | 12 h 30 min |
| October | 7:09 AM | 6:22 PM | 11 h 12 min |
| November | 6:44 AM | 4:45 PM | 10 h 1 min |
| December | 7:13 AM | 4:37 PM | 9 h 24 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Sylvan?
Sylvan has a hot-summer humid continental climate. The warmest month is July, with an average high of 85°F (30°C), and the coldest is January, with average lows of 17°F (-8°C).
It gets about 37.7 inches (956 mm) of precipitation a year. The wettest month is May and the driest is February. Snow is common: about 15 inches fall in an average year.
The best time to visit Sylvan is May–June and August–September. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near Sylvan
The closest live webcam is Springfield, 25.8 miles SE of Sylvan.
Webcams: Windy.com. Distances in a straight line from Sylvan.
Do you know Sylvan? Tell us about it
Help other travelers: share what makes Sylvan special. We review every message before publishing it.
Map of Sylvan, IL
Tap any road on the map to see it in Street View below. Map: © OpenStreetMap contributors.
Sylvan Street View
Drag the image to look around and tap the arrows on the ground to move. If it says there is no imagery, tap a nearby street on the map above.
Open in Google Maps ›Towns near Sylvan
Other communities near Sylvan
Questions about Sylvan
Where is Sylvan, IL?
Sylvan is an unincorporated community in Cass County, Illinois, 6.0 miles NW of Chandlerville.
What county is Sylvan in?
Sylvan is in Cass County, Illinois.
What is the ZIP code of Sylvan, IL?
The ZIP code for Sylvan is 62627.
What is the nearest town to Sylvan?
Chandlerville, 6.0 miles away.
Are there webcams near Sylvan?
Yes. The closest is Springfield, 25.8 miles away.
What is the hottest month in Sylvan?
July, with an average high of 85°F (30°C).
What is the coldest month in Sylvan?
January, with an average low of 17°F (-8°C).
How much does it rain in Sylvan?
About 37.7 inches (956 mm) a year; the wettest month is May.
Does it snow in Sylvan?
Yes, about 15 inches of snow fall in an average year.
When is the best time to visit Sylvan?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Sylvan have?
Hot-summer humid continental (Köppen Dfa).
Last updated: