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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Grand River, Iowa, is another subzero cold winter month, with an average temperature varying between 30.6°F (-0.8°C) and 16.9°F (-8.4°C). Temperature records mark January as the coldest month, with highs averaging 30.6°F (-0.8°C) and lows at 16.9°F (-8.4°C). Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Grand River, Iowa, with an average temperature fluctuating between 19.8°F (-6.8°C) and 34.3°F (1.3°C). The arrival of February sees a recorded average high-temperature of a cold 34.3°F (1.3°C), showing little divergence from the previous month's conditions. Weather in February »
Weather in March
March, the first month of the spring in Grand River, is a frosty month, with an average temperature varying between 48.9°F (9.4°C) and 33.4°F (0.8°C). A noticeable upsurge in temperatures is seen as February gives way to March, with average highs moving from a cold 34.3°F (1.3°C) to a chilly 48.9°F (9.4°C). Weather in March »
Weather in April
April in Grand River, Iowa, is a moderate spring month, with an average temperature ranging between max 60.4°F (15.8°C) and min 43°F (6.1°C). April signals a shift in the average high-temperature, moving from March's frosty 48.9°F (9.4°C) to a mild 60.4°F (15.8°C). Weather in April »
Weather in May
May, the last month of the spring in Grand River, is a pleasant month, with temperature in the range of an average low of 53.1°F (11.7°C) and an average high of 69.4°F (20.8°C). As April transitions into May, a change in temperatures is observed, with average highs moving from a mild 60.4°F (15.8°C) to a pleasant 69.4°F (20.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Grand River, Iowa, with an average temperature fluctuating between 79.9°F (26.6°C) and 63.1°F (17.3°C). Noticing a change, the average high-temperature during June moves from May's pleasant 69.4°F (20.8°C) to a moderately hot 79.9°F (26.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Grand River, Iowa, with an average temperature ranging between max 83.5°F (28.6°C) and min 66°F (18.9°C). July is the month when Grand River sees the highest average temperatures, with a high of 83.5°F (28.6°C) and a low of 66°F (18.9°C). For most parts of July, the heat index is computed to be a tropical 93.2°F (34°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Grand River, Iowa, with an average temperature varying between 63.5°F (17.5°C) and 81.9°F (27.7°C). The arrival of August records an average high-temperature of a still moderately hot 81.9°F (27.7°C), closely related to the 83.5°F (28.6°C) observed in July. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Grand River, Iowa, with an average temperature ranging between max 76.1°F (24.5°C) and min 56.3°F (13.5°C). September signifies a gentle decline in Grand River's average high-temperature, easing from a moderately hot 81.9°F (27.7°C) in August to a still warm 76.1°F (24.5°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Grand River, Iowa, with temperature in the range of an average high of 61.7°F (16.5°C) and an average low of 44.4°F (6.9°C). Grand River's October weather is marked by a distinct drop in high-temperatures, declining from a warm 76.1°F (24.5°C) in September to an enjoyable 61.7°F (16.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Grand River, Iowa, with an average temperature ranging between max 48.6°F (9.2°C) and min 33.1°F (0.6°C). Arrival of November comes with a reduction in the average high-temperature, falling from an enjoyable 61.7°F (16.5°C) in October to a frosty 48.6°F (9.2°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Grand River, Iowa, with temperature in the range of an average high of 35.6°F (2°C) and an average low of 23.4°F (-4.8°C). The arrival of December corresponds with a shift in temperature, down from a frosty 48.6°F (9.2°C) in November to a cold 35.6°F (2°C). Weather in December »
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
January brings the lowest temperatures, with an average high of 30.6°F (-0.8°C) and an average low of 16.9°F (-8.4°C).
What is the driest month?
January and December are months with the least rain when the rain falls for 4.8 days and typically aggregates up to 0.67" (17mm) of rain.
How much does it rain?
In Grand River, during the entire year, the rain falls for 132.4 days and collects up to 20.24" (514mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 8.6 days and accumulates 2.72" (69mm) of snow.
How many days does it snow?
In Grand River, during the entire year, snow falls for 30.2 days and aggregates up to 10.16" (258mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.4h of sunshine.
What is the month with the lowest UV index?
January is the month with the lowest UV index, with an average maximum UV index of 1.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the most humid month?
The most humid month is June, with an average relative humidity of 83%.
What is the wettest month in Grand River?
The month with the most rainfall is June, when the rain falls for 17.3 days and typically aggregates up to 3.43" (87mm) of precipitation.
When it does not snow in Grand River?
In Grand River, Iowa, snow does not fall in June through September.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the hottest time of year?
Grand River reaches its average highest temperatures in July, measuring 83.5°F (28.6°C) at the peak and 66°F (18.9°C) at the lowest.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.4h of sunshine.
What is the least humid month?
With an average relative humidity of 72%, October is the least humid month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Grand River, IA
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.6°F).
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure
Grand River, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Grand River, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.6mph - Average wind speed in June:
8mph
- Average wind speed in July:
6.9mph - Average wind speed in August:
6.9mph - Average wind speed in September:
7.9mph - Average wind speed in October:
9.3mph - Average wind speed in November:
10.2mph - Average wind speed in December:
9.9mph
The windiest months (with the highest average wind speed) are January, February and March (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity
Grand River, IA
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Grand River, IA
- Average rainfall in January:
0.67" - Average rainfall in February:
0.71" - Average rainfall in March:
1.5" - Average rainfall in April:
1.81" - Average rainfall in May:
2.8" - Average rainfall in June:
3.43"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.93" - Average rainfall in September:
2.24" - Average rainfall in October:
1.54" - Average rainfall in November:
1.06" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is June (3.43").
The driest months (with the least rainfall) are January and December (0.67").
Average rainfall days
Grand River, IA
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
5 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
17.2 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
5.7 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall
Grand River, IA
The month with the highest snowfall is January (2.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grand River, IA
- Average snowfall days in January:
8.6 days - Average snowfall days in February:
8.2 days - Average snowfall days in March:
3.7 days - Average snowfall days in April:
1.3 days - Average snowfall days in May:
0.2 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.5 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
5.9 days
The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grand River, IA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Grand River, IA
- Average sunshine days in January:
19.1 days - Average sunshine days in February:
15.9 days - Average sunshine days in March:
15 days - Average sunshine days in April:
13.6 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
8.9 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
16 days - Average sunshine days in October:
18.6 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
20.3 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (8.9 days).
Average UV index
Grand River, IA
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Grand River, IA
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Grand River, IA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Grand River, Iowa, USA
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