Duncan, IA weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Duncan now
Loading the National Weather Service forecast…
Duncan weather by the hour
Duncan weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Duncan.
This week in Duncan
Sunrise, sunset and moon in Duncan
What is the weather usually like in Duncan?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 82°F average high
- Januarycoldest month · 6°F average low
- 34.3 inprecipitation per year · 871 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Duncan: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station BRITT 3E, IA US (USC00130923), adjusted for the elevation of Duncan.
Duncan weather month by month
Sunrise and sunset in Duncan through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:41 AM | 5:06 PM | 9 h 25 min |
| February | 7:10 AM | 5:47 PM | 10 h 36 min |
| March | 7:24 AM | 7:22 PM | 11 h 57 min |
| April | 6:30 AM | 7:58 PM | 13 h 28 min |
| May | 5:49 AM | 8:33 PM | 14 h 43 min |
| June | 5:32 AM | 8:57 PM | 15 h 24 min |
| July | 5:47 AM | 8:54 PM | 15 h 6 min |
| August | 6:19 AM | 8:19 PM | 13 h 59 min |
| September | 6:53 AM | 7:26 PM | 12 h 33 min |
| October | 7:27 AM | 6:33 PM | 11 h 6 min |
| November | 7:06 AM | 4:52 PM | 9 h 46 min |
| December | 7:37 AM | 4:42 PM | 9 h 4 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Duncan?
Duncan has a hot-summer humid continental climate. The warmest month is July, with an average high of 82°F (28°C), and the coldest is January, with average lows of 6°F (-14°C).
It gets about 34.3 inches (871 mm) of precipitation a year. The wettest month is June and the driest is January.
The best time to visit Duncan is June to September. At 1,237 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 Duncan
Weather in towns near Duncan
Questions about the weather in Duncan
What is the hottest month in Duncan?
July, with an average high of 82°F (28°C).
What is the coldest month in Duncan?
January, with an average low of 6°F (-14°C).
How much does it rain in Duncan?
About 34.3 inches (871 mm) a year; the wettest month is June.
Does it snow in Duncan?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Duncan?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Duncan have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Duncan in November?
Highs average 43°F and lows 25°F, with about 1.4 inches of precipitation.
What time is sunrise in Duncan?
Around 7:06 AM in mid-November, and sunset around 4:52 PM. Today’s exact times are shown above.
Where does this Duncan weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Duncan.
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