Expand
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 Castana, Iowa, is another subzero cold winter month, with an average temperature varying between 15.1°F (-9.4°C) and 28°F (-2.2°C). January, characterized by an average high temperature of 28°F (-2.2°C) and a low temperature of 15.1°F (-9.4°C), is generally the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Castana, Iowa, with an average temperature fluctuating between 32.2°F (0.1°C) and 18.3°F (-7.6°C). With the onset of February, a modest change to an icy 32.2°F (0.1°C) from January's 28°F (-2.2°C) is noted in high-temperature. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Castana, Iowa, with an average temperature ranging between min 31.8°F (-0.1°C) and max 47.8°F (8.8°C). Castana's weather in March is characterized by a distinct rise in the average high-temperature, escalating from a wintry 32.2°F (0.1°C) in February to a chilly 47.8°F (8.8°C). Weather in March »
Weather in April
April is a moderate spring month in Castana, Iowa, with temperature in the range of an average high of 59.4°F (15.2°C) and an average low of 42.1°F (5.6°C). In April, the average high-temperature increases from a chilly 47.8°F (8.8°C) in March to a mild 59.4°F (15.2°C). Weather in April »
Weather in May
May, the last month of the spring in Castana, is an agreeable month, with an average temperature fluctuating between 53.2°F (11.8°C) and 70.3°F (21.3°C). May's arrival coincides with a rise in the average high-temperature, moving from April's moderate 59.4°F (15.2°C) to an agreeable 70.3°F (21.3°C). Weather in May »
Weather in June
June, the first month of the summer in Castana, is a moderately hot month, with an average temperature ranging between min 63.1°F (17.3°C) and max 80.2°F (26.8°C). June sees a temperature increase, moving from a pleasant 70.3°F (21.3°C) in May to a moderately hot 80.2°F (26.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Castana, Iowa, with an average temperature ranging between min 65.5°F (18.6°C) and max 83.8°F (28.8°C). July, with its average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 65.5°F (18.6°C), holds the record as the warmest month. The average heat index in July is calculated to be a hot 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Castana, is also a moderately hot month, with an average temperature varying between 82°F (27.8°C) and 61.7°F (16.5°C). Castana, Iowa, experiences an average high-temperature of a still warm 82°F (27.8°C) with the onset of August, subtly varied from July's 83.8°F (28.8°C). Weather in August »
Weather in September
September, the first month of the autumn in Castana, is still a warm month, with an average temperature ranging between min 56.3°F (13.5°C) and max 76.1°F (24.5°C). Castana's September weather features a light decline in high-temperatures, reducing from 82°F (27.8°C) in August to a still moderately hot 76.1°F (24.5°C). Weather in September »
Weather in October
October, the same as September, in Castana, Iowa, is another refreshing autumn month, with an average temperature ranging between max 60.6°F (15.9°C) and min 44.4°F (6.9°C). As Castana transitions into October, a noticeable drop in the average high-temperature is observed, falling from a moderately hot 76.1°F (24.5°C) in September to a moderate 60.6°F (15.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Castana, Iowa, with an average temperature fluctuating between 32.7°F (0.4°C) and 47.3°F (8.5°C). The onset of November is marked by a decrease in temperature, transitioning from a mild 60.6°F (15.9°C) in October to a frosty 47.3°F (8.5°C). Weather in November »
Weather in December
December, the first month of the winter in Castana, is still a cold month, with an average temperature fluctuating between 32.2°F (0.1°C) and 20.3°F (-6.5°C). Castana's weather undergoes a significant change with the arrival of December, as the average high-temperature drops from a frosty 47.3°F (8.5°C) in November to a wintry 32.2°F (0.1°C). Weather in December »
Updated: Jul 17, 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 time of the year is the coldest?
January is the coldest month of the year, registering average temperatures as high as 28°F (-2.2°C) and as low as 15.1°F (-9.4°C).
What is the most humid month?
With an average relative humidity of 82%, January is the most humid month.
What is the driest month?
January is the month with the least rainfall. Rain falls for 2.9 days and accumulates 0.67" (17mm) of precipitation.
How much does it rain?
In Castana, during the entire year, the rain falls for 117.6 days and collects up to 21.89" (556mm) of precipitation.
When does it snow in Castana?
January through April, October through December are months with snowfall.
How many days does it snow?
Throughout the year, there are 32.9 snowfall days, and 11.69" (297mm) of snow is accumulated.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.4h of sunshine.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 7.5 days and accumulates 3.03" (77mm) of snow.
What are the months with the lowest UV index?
February and December, with an average maximum UV index of 1, are months with the lowest UV index.
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 least humid month?
April and October, with an average relative humidity of 66%, are the least humid months.
What is the rainiest month?
May is the month with the most rainfall in Castana. Rain falls for 16.6 days and accumulates 3.31" (84mm) of precipitation.
When it does not snow?
In Castana, 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 is the month with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the hottest time of year?
The temperatures reach their highest averages in July, with highs of 83.8°F (28.8°C) and lows of 65.5°F (18.6°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.6h of sunshine.
What is the month with the shortest days in Castana?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Castana, IA
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (28°F).
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure
Castana, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.86"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed
Castana, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.7mph
- Average wind speed in July:
7.4mph - Average wind speed in August:
7.7mph - Average wind speed in September:
8.8mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity
Castana, IA
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April and October (66%).
Average rainfall
Castana, IA
- Average rainfall in January:
0.67" - Average rainfall in February:
0.83" - Average rainfall in March:
1.38" - Average rainfall in April:
2.17" - Average rainfall in May:
3.31" - Average rainfall in June:
3.15"
- Average rainfall in July:
1.77" - Average rainfall in August:
2.28" - Average rainfall in September:
2.05" - Average rainfall in October:
2.05" - Average rainfall in November:
0.83" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days
Castana, IA
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
2.7 days - Average rainfall days in March:
8.9 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
12.6 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
3.5 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (2.7 days).
Average snowfall
Castana, IA
The month with the highest snowfall is February (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Castana, IA
- Average snowfall days in January:
8.9 days - Average snowfall days in February:
7.5 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
1.5 days - Average snowfall days in May:
0.1 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:
0.9 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
7 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Castana, 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:
4h and 2min - Average sunshine in February:
5h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Castana, IA
- Average sunshine days in January:
19.4 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
17.9 days - Average sunshine days in April:
14 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
15.6 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
19 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
20.7 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12 days).
Average UV index
Castana, IA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Castana, IA
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility
Castana, 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).
Castana, Iowa, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location