Riley, IL weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Riley now
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Riley weather by the hour
Riley weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Riley.
This week in Riley
Sunrise, sunset and moon in Riley
What is the weather usually like in Riley?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 83°F average high
- Januarycoldest month · 13°F average low
- 37.6 inprecipitation per year · 955 mm
- 30.8 insnowfall per year · 78 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Riley: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station MARENGO, IL US (USC00115326), adjusted for the elevation of Riley.
Riley weather month by month
Sunrise and sunset in Riley through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:18 AM | 4:49 PM | 9 h 30 min |
| February | 6:48 AM | 5:28 PM | 10 h 39 min |
| March | 7:04 AM | 7:02 PM | 11 h 57 min |
| April | 6:11 AM | 7:37 PM | 13 h 25 min |
| May | 5:31 AM | 8:10 PM | 14 h 38 min |
| June | 5:15 AM | 8:34 PM | 15 h 18 min |
| July | 5:30 AM | 8:30 PM | 15 h 0 min |
| August | 6:00 AM | 7:56 PM | 13 h 56 min |
| September | 6:33 AM | 7:05 PM | 12 h 32 min |
| October | 7:06 AM | 6:14 PM | 11 h 8 min |
| November | 6:43 AM | 4:34 PM | 9 h 50 min |
| December | 7:14 AM | 4:24 PM | 9 h 10 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Riley?
Riley has a hot-summer humid continental climate. The warmest month is July, with an average high of 83°F (29°C), and the coldest is January, with average lows of 13°F (-11°C).
It gets about 37.6 inches (955 mm) of precipitation a year. The wettest month is June and the driest is February. Snow is common: about 31 inches fall in an average year.
The best time to visit Riley is June to 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.
More about Riley
Weather in towns near Riley
Questions about the weather in Riley
What is the hottest month in Riley?
July, with an average high of 83°F (29°C).
What is the coldest month in Riley?
January, with an average low of 13°F (-11°C).
How much does it rain in Riley?
About 37.6 inches (955 mm) a year; the wettest month is June.
Does it snow in Riley?
Yes, about 31 inches of snow fall in an average year.
When is the best time to visit Riley?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Riley have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Riley in November?
Highs average 47°F and lows 29°F, with about 2.4 inches of precipitation.
What time is sunrise in Riley?
Around 6:43 AM in mid-November, and sunset around 4:34 PM. Today’s exact times are shown above.
Where does this Riley weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Riley.
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