Marion, IA Weather
Marion, IA climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 20's.
The warmest month of the year is July with an average maximum temperature of 85.30 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 11.50 degrees Fahrenheit.
Temperature variations between night and day tend to be moderate during summer with a difference that can reach 21 degrees Fahrenheit, and fairly limited during winter with an average difference of 17 degrees Fahrenheit.
The annual average precipitation at Marion is 36.62 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is June with an average rainfall of 4.80 Inches.
Weather Data
Current Conditions
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Overcast, 56°F | Humidity: 72% | Dewpoint: 47°F |
| Wind Speed: SE 6.9 MPH (6 KT) | Heat Index: 56°F | ||
| Barometer: 30.06 in. | Wind Chill: 54°F |
Weather Forecast
| Hi: 59°F | Rest of today: Cloudy with a 30 percent chance of showers. High in the upper 50s. South wind 10 to 15 mph. | |
| Lo: 41°F | ||
| Hi: 51°F | Monday: Mostly cloudy. A 20 percent chance of light rain in the morning. High in the lower 50s. Southeast wind 10 to 15 mph. | |
| Lo: 41°F | ||
| Hi: 45°F | Tuesday: Rain likely. High in the mid 40s. East wind 10 to 15 mph. Chance of rain 70 percent. | |
| Lo: 35°F | ||
| Hi: 40°F | Wednesday: Cloudy with a 50 percent chance of rain and snow. High around 40. | |
| Lo: 30°F | ||
| Hi: 39°F | Thanksgiving day: Blustery. Mostly cloudy with scattered snow showers. High in the upper 30s. Chance of snow 30 percent. | |
| Lo: 25°F | ||
| Hi: 40°F | Friday: Mostly sunny. High around 40. | |
| Lo: 25°F |
Moon, Sunrise and Sunset
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Moon Phase: Waxing Crescent Moon | Civil Twilight: 6:33 AM CST |
Sunrise: 7:04 AM CST |
| Sunset: 4:40 PM CST |
Civil Twilight: 5:10 PM CST |
Normal Climate
Normal Temperatures
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max °F | 28.3 | 34.9 | 47.4 | 61.8 | 73.1 | 81.8 | 85.3 | 83.1 | 75.7 | 64.1 | 46.4 | 32.6 | 59.5 |
| Mean °F | 19.9 | 26.3 | 37.8 | 50.4 | 61.8 | 70.9 | 74.8 | 72.7 | 64.7 | 53.3 | 38.0 | 25.0 | 49.6 |
| Min °F | 11.5 | 17.6 | 28.1 | 38.9 | 50.4 | 60.0 | 64.3 | 62.3 | 53.7 | 42.5 | 29.6 | 17.3 | 39.7 |
Normal Precipitation
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inch | 1.13 | 1.10 | 2.08 | 3.46 | 4.50 | 4.80 | 4.47 | 4.73 | 3.79 | 2.58 | 2.50 | 1.48 | 36.62 |

