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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 Castle Grove, Iowa, is another subzero cold winter month, with an average temperature ranging between min 13.3°F (-10.4°C) and max 25.2°F (-3.8°C). January is the month when Castle Grove sees the lowest average temperatures, with a high of 25.2°F (-3.8°C) and a low of 13.3°F (-10.4°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Castle Grove, Iowa, with an average temperature varying between 16°F (-8.9°C) and 28.9°F (-1.7°C). During February, Castle Grove observes a subtle ascent to a still subzero cold 28.9°F (-1.7°C) from January's 25.2°F (-3.8°C) in the average high-temperature. Weather in February »
Weather in March
March, the first month of the spring in Castle Grove, is a frosty month, with an average temperature varying between 29.5°F (-1.4°C) and 44.2°F (6.8°C). March's onset is marked by a clear temperature increase, soaring from a freezing cold 28.9°F (-1.7°C) in February to a frosty 44.2°F (6.8°C). Weather in March »
Weather in April
April is a mild spring month in Castle Grove, Iowa, with temperature in the range of an average high of 56.1°F (13.4°C) and an average low of 39.9°F (4.4°C). April sees a rise in the average high-temperature, climbing from a chilly 44.2°F (6.8°C) in March to a mild 56.1°F (13.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Castle Grove, Iowa, with an average temperature varying between 51.1°F (10.6°C) and 68.4°F (20.2°C). The beginning of May marks a shift in the average high-temperature, moving from April's refreshing 56.1°F (13.4°C) to an agreeable 68.4°F (20.2°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Castle Grove, Iowa, with an average temperature fluctuating between 60.4°F (15.8°C) and 77°F (25°C). June showcases a minor temperature ascent, adjusting from May's agreeable 68.4°F (20.2°C) to a moderately hot 77°F (25°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Castle Grove, Iowa, with an average temperature fluctuating between 63.3°F (17.4°C) and 80.1°F (26.7°C). The warmest time of the year is July, with temperatures averaging a high of 80.1°F (26.7°C) and a low of 63.3°F (17.4°C). Weather in July »
Weather in August
August, the last month of the summer in Castle Grove, is also a moderately hot month, with an average temperature ranging between min 60.6°F (15.9°C) and max 78.6°F (25.9°C). August's arrival brings an average high-temperature of a still moderately hot 78.6°F (25.9°C), slightly deviating from July's 80.1°F (26.7°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Castle Grove, Iowa, with temperature in the range of an average high of 73°F (22.8°C) and an average low of 54.3°F (12.4°C). In Castle Grove, the average high-temperature in September gently drops from a warm 78.6°F (25.9°C) in August to an agreeable 73°F (22.8°C). Weather in September »
Weather in October
October, the same as September, in Castle Grove, Iowa, is a moderate autumn month, with temperature in the range of an average high of 58.6°F (14.8°C) and an average low of 43.2°F (6.2°C). With the onset of October, Castle Grove's average high-temperature witnesses a clear drop, receding from September's agreeable 73°F (22.8°C) to a refreshing 58.6°F (14.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Castle Grove, is another chilly month, with an average temperature ranging between min 31.3°F (-0.4°C) and max 44.6°F (7°C). November implies a gentle temperature shift, with average high-temperatures reducing from October's mild 58.6°F (14.8°C) to a frosty 44.6°F (7°C). Weather in November »
Weather in December
December, the first month of the winter in Castle Grove, is still a freezing cold month, with an average temperature fluctuating between 21.4°F (-5.9°C) and 31.8°F (-0.1°C). The shift to December brings a decrease in the average high-temperature, falling from a frosty 44.6°F (7°C) in November to a subzero cold 31.8°F (-0.1°C). Weather in December »
Updated: Jul 3, 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 time of year?
In Castle Grove, January registers the lowest temperatures, averaging 25.2°F (-3.8°C) at the peak and 13.3°F (-10.4°C) at the lowest.
What is the most humid month?
January and February, with an average relative humidity of 86%, are most humid months.
What is the driest month?
The months with the least rainfall are January and February Rain falls for 5.2 days and accumulates 1.26" (32mm) of rain.
How many days does it rain?
Throughout the year, in Castle Grove, there are 142.5 rainfall days, and 28.27" (718mm) of precipitation is accumulated.
When does it snow?
January through April, October through December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 12.1 days and accumulates 5.04" (128mm) of snow.
How much does it snow?
In Castle Grove, during the entire year, snow falls for 43.2 days and aggregates up to 17.17" (436mm) of snow.
What is the month with the least sunshine in Castle Grove?
With an average of 3.8h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index?
The months with the lowest UV index are January and December, 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 wettest month?
May is the month with the most rainfall. Rain falls for 18.6 days and accumulates 4.25" (108mm) of precipitation.
When it does not snow?
In Castle Grove, 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.
When is the highest UV index?
The months with the highest UV index in Castle Grove are June and July, with an average maximum UV index of 6.
What are the warmest months?
July is Castle Grove's warmest month, registering average high temperatures of 80.1°F (26.7°C) and lows of 63.3°F (17.4°C).
What are the months with the most sunshine?
July and August, with an average of 9.9h of sunshine, are months with the most sunshine.
What is the least humid month?
With an average relative humidity of 74%, October is the least humid month.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Castle Grove, IA
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.2°F).
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure
Castle Grove, 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:
29.93"Hg - Average pressure in May:
29.94"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"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
Castle Grove, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.9mph - Average wind speed in September:
8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity
Castle Grove, IA
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Castle Grove, IA
- Average rainfall in January:
1.26" - Average rainfall in February:
1.26" - Average rainfall in March:
1.85" - Average rainfall in April:
3.15" - Average rainfall in May:
4.25" - Average rainfall in June:
3.78"
- Average rainfall in July:
2.83" - Average rainfall in August:
1.77" - Average rainfall in September:
2.52" - Average rainfall in October:
2.52" - Average rainfall in November:
1.65" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (4.25").
The driest months (with the least rainfall) are January and February (1.26").
Average rainfall days
Castle Grove, IA
- Average rainfall days in January:
5.2 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
16 days - Average rainfall days in May:
18.6 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
12.5 days - Average rainfall days in September:
11.4 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
7.7 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (5.2 days).
Average snowfall
Castle Grove, IA
The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Castle Grove, IA
- Average snowfall days in January:
12.1 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
6 days - Average snowfall days in April:
1.6 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:
0.6 days - Average snowfall days in November:
4 days - Average snowfall days in December:
9.4 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Castle Grove, IA
- Average daylight in January:
9h and 3min - 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 0min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 5min - 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 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Castle Grove, IA
- Average sunshine days in January:
15.8 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
11.1 days - Average sunshine days in May:
10.6 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
16.7 days - Average sunshine days in September:
17 days - Average sunshine days in October:
16.9 days - Average sunshine days in November:
16.8 days - Average sunshine days in December:
16.7 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is June (10.5 days).
Average UV index
Castle Grove, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Castle Grove, IA
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Castle Grove, 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).
Castle Grove, Iowa, USA
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