Post Oak, IL
Unincorporated community in Fayette County, Illinois
Post Oak is a small unincorporated community in Fayette County, Illinois. It is 5.7 miles SE of St. Elmo, the nearest town. Its ZIP code is 62458.
Post Oak at a glance
- State
- Illinois
- County
- Fayette County
- ZIP code
- 62458
- Nearest town
- St. Elmo (5.7 mi)
- Time zone
- America/Chicago
- Coordinates
- 39.0903, -88.9092
Weather in Post Oak now
Loading the National Weather Service forecast…
Post Oak weather by the hour
Post Oak weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Post Oak.
This week in Post Oak
Sunrise, sunset and moon in Post Oak
What is the weather usually like in Post Oak?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 87°F average high
- Januarycoldest month · 21°F average low
- 41.2 inprecipitation per year · 1,046 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Post Oak: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station BROWNSTOWN 4 SW, IL US (USC00111020), adjusted for the elevation of Post Oak.
Post Oak weather month by month
Sunrise and sunset in Post Oak through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:11 AM | 4:58 PM | 9 h 47 min |
| February | 6:45 AM | 5:34 PM | 10 h 48 min |
| March | 7:05 AM | 7:03 PM | 11 h 58 min |
| April | 6:16 AM | 7:34 PM | 13 h 17 min |
| May | 5:40 AM | 8:03 PM | 14 h 22 min |
| June | 5:27 AM | 8:24 PM | 14 h 57 min |
| July | 5:40 AM | 8:22 PM | 14 h 41 min |
| August | 6:07 AM | 7:52 PM | 13 h 44 min |
| September | 6:35 AM | 7:05 PM | 12 h 29 min |
| October | 7:04 AM | 6:18 PM | 11 h 14 min |
| November | 6:37 AM | 4:42 PM | 10 h 5 min |
| December | 7:06 AM | 4:35 PM | 9 h 29 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Post Oak?
Post Oak has a hot-summer humid continental climate. The warmest month is July, with an average high of 87°F (30°C), and the coldest is January, with average lows of 21°F (-6°C).
It gets about 41.2 inches (1,046 mm) of precipitation a year. The wettest month is May and the driest is December.
The best time to visit Post Oak 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 Post Oak
The closest live webcam is Mattoon, 39.2 miles NE of Post Oak.
Webcams: Windy.com. Distances in a straight line from Post Oak.
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Map of Post Oak, IL
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Post Oak Street View
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Questions about Post Oak
Where is Post Oak, IL?
Post Oak is an unincorporated community in Fayette County, Illinois, 5.7 miles SE of St. Elmo.
What county is Post Oak in?
Post Oak is in Fayette County, Illinois.
What is the ZIP code of Post Oak, IL?
The ZIP code for Post Oak is 62458.
What is the nearest town to Post Oak?
St. Elmo, 5.7 miles away.
Are there webcams near Post Oak?
Yes. The closest is Mattoon, 39.2 miles away.
What is the hottest month in Post Oak?
July, with an average high of 87°F (30°C).
What is the coldest month in Post Oak?
January, with an average low of 21°F (-6°C).
How much does it rain in Post Oak?
About 41.2 inches (1,046 mm) a year; the wettest month is May.
Does it snow in Post Oak?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Post Oak?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Post Oak have?
Hot-summer humid continental (Köppen Dfa).
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