Rock Valley, IA weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Rock Valley now
Loading the National Weather Service forecast…
Rock Valley weather by the hour
Rock Valley weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Rock Valley.
This week in Rock Valley
Sunrise, sunset and moon in Rock Valley
What is the weather usually like in Rock Valley?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 85°F average high
- Januarycoldest month · 10°F average low
- 29.9 inprecipitation per year · 758 mm
- 34.8 insnowfall per year · 88 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Rock Valley: May and July to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station SIOUX CTR 2 SE, IA US (USC00137700), adjusted for the elevation of Rock Valley.
Rock Valley weather month by month
Sunrise and sunset in Rock Valley through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:52 AM | 5:16 PM | 9 h 24 min |
| February | 7:20 AM | 5:57 PM | 10 h 36 min |
| March | 7:35 AM | 7:32 PM | 11 h 57 min |
| April | 6:40 AM | 8:09 PM | 13 h 28 min |
| May | 5:59 AM | 8:43 PM | 14 h 44 min |
| June | 5:42 AM | 9:08 PM | 15 h 25 min |
| July | 5:57 AM | 9:04 PM | 15 h 6 min |
| August | 6:29 AM | 8:29 PM | 14 h 0 min |
| September | 7:03 AM | 7:36 PM | 12 h 33 min |
| October | 7:37 AM | 6:43 PM | 11 h 6 min |
| November | 7:16 AM | 5:02 PM | 9 h 45 min |
| December | 7:48 AM | 4:52 PM | 9 h 3 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Rock Valley?
Rock Valley 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 10°F (-12°C).
It gets about 29.9 inches (758 mm) of precipitation a year. The wettest month is June and the driest is January. Snow is common: about 35 inches fall in an average year.
The best time to visit Rock Valley is May and July to September. At 1,250 ft of elevation, nights are mild most of the year. 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 Rock Valley
Weather in towns near Rock Valley
Questions about the weather in Rock Valley
What is the hottest month in Rock Valley?
July, with an average high of 85°F (30°C).
What is the coldest month in Rock Valley?
January, with an average low of 10°F (-12°C).
How much does it rain in Rock Valley?
About 29.9 inches (758 mm) a year; the wettest month is June.
Does it snow in Rock Valley?
Yes, about 35 inches of snow fall in an average year.
When is the best time to visit Rock Valley?
May and July to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Rock Valley have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Rock Valley in November?
Highs average 46°F and lows 26°F, with about 1.4 inches of precipitation.
What time is sunrise in Rock Valley?
Around 7:16 AM in mid-November, and sunset around 5:02 PM. Today’s exact times are shown above.
Where does this Rock Valley weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Rock Valley.
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