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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 Mound, Iowa, is a freezing cold winter month, with temperature in the range of an average high of 26.6°F (-3°C) and an average low of 14.4°F (-9.8°C). Temperature readings reach their annual highs in January, averaging 26.6°F (-3°C) and a minimum average of 14.4°F (-9.8°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Grand Mound, Iowa, with an average temperature ranging between min 18.1°F (-7.7°C) and max 30.9°F (-0.6°C). February registers an average high-temperature of a still freezing cold 30.9°F (-0.6°C), slightly varied from January's 26.6°F (-3°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Grand Mound, Iowa, with an average temperature varying between 45.9°F (7.7°C) and 31.1°F (-0.5°C). Grand Mound in March experiences a marked increase in the average high-temperature, ascending from February's subzero cold 30.9°F (-0.6°C) to a frosty 45.9°F (7.7°C). Weather in March »
Weather in April
April is a moderate spring month in Grand Mound, Iowa, with an average temperature varying between 40.8°F (4.9°C) and 57.9°F (14.4°C). The start of April signals an increase in the average high-temperature, moving from a chilly 45.9°F (7.7°C) in March to a mild 57.9°F (14.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Grand Mound, Iowa, with an average temperature ranging between min 52.3°F (11.3°C) and max 69.3°F (20.7°C). The start of May is characterized by an increase in the average high-temperature, transitioning from a mild 57.9°F (14.4°C) in April to a pleasant 69.3°F (20.7°C). Weather in May »
Weather in June
June, the first month of the summer in Grand Mound, is a moderately hot month, with an average temperature ranging between max 78.4°F (25.8°C) and min 61.5°F (16.4°C). June's arrival coincides with a rise in the average high-temperature, moving from May's pleasant 69.3°F (20.7°C) to a moderately hot 78.4°F (25.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Grand Mound, Iowa, with an average temperature ranging between max 80.4°F (26.9°C) and min 64.2°F (17.9°C). July, recognised by an average high temperature of 80.4°F (26.9°C) and a low of 64.2°F (17.9°C), is Grand Mound's warmest month. Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Grand Mound, Iowa, with an average temperature varying between 80.1°F (26.7°C) and 61.9°F (16.6°C). The commencement of August notes an average high-temperature of a still moderately hot 80.1°F (26.7°C), exhibiting little difference from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Grand Mound, is also a moderately hot month, with temperature in the range of an average low of 55°F (12.8°C) and an average high of 74.1°F (23.4°C). September brings a slight decrease in the average high-temperature, shifting from 80.1°F (26.7°C) in August to a still moderately hot 74.1°F (23.4°C). Weather in September »
Weather in October
October, the same as September, in Grand Mound, Iowa, is another mild autumn month, with temperature in the range of an average low of 44.2°F (6.8°C) and an average high of 60.1°F (15.6°C). October implies a gentle temperature shift, with average high-temperatures reducing from September's moderately hot 74.1°F (23.4°C) to a moderate 60.1°F (15.6°C). Weather in October »
Weather in November
November, the last month of the autumn in Grand Mound, is another chilly month, with an average temperature fluctuating between 32.2°F (0.1°C) and 45.7°F (7.6°C). November's onset witnesses a marked shift in the average high-temperature, moving from a mild 60.1°F (15.6°C) in October to a chilly 45.7°F (7.6°C). Weather in November »
Weather in December
December, the first month of the winter in Grand Mound, is still a cold month, with an average temperature fluctuating between 22.6°F (-5.2°C) and 33.4°F (0.8°C). Onset of December witnesses a reduction in the average high-temperature, falling from a chilly 45.7°F (7.6°C) in November to a cold 33.4°F (0.8°C). Weather in December »
Updated: Jul 31, 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 is the coldest month?
January, recording an average high temperature of 26.6°F (-3°C) and a low temperature of 14.4°F (-9.8°C), is Grand Mound's coldest month.
What is the most humid month?
With an average relative humidity of 85%, January is the most humid month.
How many days does it rain?
In Grand Mound, during the entire year, the rain falls for 142.1 days and collects up to 28.35" (720mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 11.5 days and typically aggregates up to 5.2" (132mm) of snow.
How much does it snow?
In Grand Mound, during the entire year, snow falls for 39.7 days and aggregates up to 15.67" (398mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.9h of sunshine.
When is the lowest UV index?
With an average maximum UV index of 1, January is the month with the lowest UV index.
What is the driest month?
The month with the least rainfall in Grand Mound is February, when the rain falls for 5.3 days and typically collects 1.26" (32mm) of precipitation.
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 rainiest month?
May is the month with the most rainfall. Rain falls for 18.2 days and accumulates 4.61" (117mm) of precipitation.
When it does not snow?
In Grand Mound, snow does not fall in May through September.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What month is the hottest?
Grand Mound, Iowa, experiences its highest temperatures in July, with an average peak of 80.4°F (26.9°C) and a low of 64.2°F (17.9°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10h of sunshine.
When is the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 6.
What is the least humid month?
October is the least humid month, with an average relative humidity of 73%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Grand Mound, IA
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (26.6°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure
Grand Mound, IA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Grand Mound, IA
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.7mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.2mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity
Grand Mound, IA
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Grand Mound, IA
- Average rainfall in January:
1.34" - Average rainfall in February:
1.26" - Average rainfall in March:
1.93" - Average rainfall in April:
3.27" - Average rainfall in May:
4.61" - Average rainfall in June:
3.54"
- Average rainfall in July:
2.6" - Average rainfall in August:
1.73" - Average rainfall in September:
2.28" - Average rainfall in October:
2.56" - Average rainfall in November:
1.85" - Average rainfall in December:
1.38"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days
Grand Mound, IA
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
11.5 days - Average rainfall days in April:
16.4 days - Average rainfall days in May:
18.2 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
15.4 days - Average rainfall days in August:
12.7 days - Average rainfall days in September:
11.2 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
7.3 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is February (5.3 days).
Average snowfall
Grand Mound, IA
The month with the highest snowfall is January (5.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Grand Mound, IA
- Average snowfall days in January:
11.5 days - Average snowfall days in February:
9.8 days - Average snowfall days in March:
4.8 days - Average snowfall days in April:
1.2 days - Average snowfall days in May:
0 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:
0.4 days - Average snowfall days in November:
3.5 days - Average snowfall days in December:
8.5 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Grand Mound, 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 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - 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 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Grand Mound, IA
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.9 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
10.7 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
16.7 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
16.6 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
16.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index
Grand Mound, IA
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Grand Mound, IA
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Grand Mound, IA
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Grand Mound, Iowa, USA
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