Grand River, IA Weather


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United States / Iowa / No Metro Area / Decatur County / Grand River / Zip Codes

The most pleasant months of the year for Grand River are September, June and August. In Grand River, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Grand River with an average high temperature of 85.2°, which ranks it as warmer than most places in Iowa. January is the snowiest month in Grand River with 6.5 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.

Today's Weather - Grand River, IA

2 PM PST

Partly Sunny

56°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
This AfternoonPartly Sunny57° / 31°WNW 16 mph
SaturdayWidespread Frost then Sunny53° / 30°NW 8 to 15 mph
SundayWidespread Frost then Sunny60° / 36°WNW 6 to 10 mph
MondayMostly Sunny then Slight Chance Rain Showers68° / 48°SSW 8 to 24 mph
TuesdayShowers And Thunderstorms Likely67° / 38°W 18 mph
WednesdayMostly Sunny64° / 43°NE 8 to 12 mph
ThursdayChance Rain Showers65° / 48°SE 12 to 18 mph

Weather Highlights

Summer High: the July high is around 85 degrees
Winter Low: the January low is 13
Rain: averages 38 inches of rain a year
Snow: averages 25 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Grand River area is 8.7 (10=best), which means it is more comfortable than most places in Iowa.

8.7 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January32° 13°
February37° 17°
March50° 28°
April62° 39°
May71° 50°
June81° 60°
July85° 64°
August84° 63°
September76° 53°
October64° 41°
November49° 29°
December35° 17°
Hot, Freezing, Rainy, Snowy Days: Grand River
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January03053
February02663
March02182
April07100
May00120
June20110
July70100
August5090
September1080
October0680
November01971
December02964

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

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