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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 Swan, Iowa, is a freezing cold winter month, with an average temperature ranging between min 15.1°F (-9.4°C) and max 28.4°F (-2°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 28.4°F (-2°C) and a low of 15.1°F (-9.4°C). Weather in January »
Weather in February
February, the last month of the winter in Swan, is a wintry month, with an average temperature ranging between min 18.7°F (-7.4°C) and max 32.5°F (0.3°C). Upon the beginning of February, Swan's high-temperatures register at a wintry 32.5°F (0.3°C), closely mirroring the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Swan, Iowa, with an average temperature varying between 32.5°F (0.3°C) and 47.7°F (8.7°C). With the transition into March, Swan experiences a significant increase in average high-temperatures, moving up from a cold 32.5°F (0.3°C) in February to a chilly 47.7°F (8.7°C). Weather in March »
Weather in April
April in Swan, Iowa, is a moderate spring month, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 42.4°F (5.8°C). April's arrival is marked by an increase in the average high-temperature, moving from a chilly 47.7°F (8.7°C) in March to a moderate 59.7°F (15.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Swan, Iowa, with an average temperature varying between 52.9°F (11.6°C) and 69.8°F (21°C). An escalation in the average high-temperature is seen with the onset of May, moving from a mild 59.7°F (15.4°C) in April to an agreeable 69.8°F (21°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Swan, Iowa, with an average temperature fluctuating between 63.1°F (17.3°C) and 79.3°F (26.3°C). Swan's transition into June brings a rise in the average high-temperature, moving from a pleasant 69.8°F (21°C) in May to a moderately hot 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Swan, Iowa, with an average temperature fluctuating between 82.9°F (28.3°C) and 65.1°F (18.4°C). Swan notes the warmest temperatures in July, with a high average of 82.9°F (28.3°C) and a low of 65.1°F (18.4°C). In July, the average heat index is appraised at a tropical 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Swan, is another warm month, with an average temperature ranging between min 62.6°F (17°C) and max 81.3°F (27.4°C). As Swan transitions from July to August, the average high-temperatures adjust to a still moderately hot 81.3°F (27.4°C), nearly the same as the previous 82.9°F (28.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Swan, is also a moderately hot month, with an average temperature fluctuating between 56.1°F (13.4°C) and 75.7°F (24.3°C). As September begins, there is a minor decrease in the average high-temperature, softly falling from 81.3°F (27.4°C) in August to a still moderately hot 75.7°F (24.3°C). Weather in September »
Weather in October
October, like September, in Swan, Iowa, is another enjoyable autumn month, with an average temperature fluctuating between 45°F (7.2°C) and 60.8°F (16°C). The arrival of October signals a clear decrease in the average high-temperature, falling from a warm 75.7°F (24.3°C) in September to a comfortable 60.8°F (16°C). Weather in October »
Weather in November
November, the last month of the autumn in Swan, is another chilly month, with an average temperature varying between 47.1°F (8.4°C) and 32.9°F (0.5°C). Swan's November weather shows a moderate shift in high-temperatures, falling from October's refreshing 60.8°F (16°C) to a frosty 47.1°F (8.4°C). Weather in November »
Weather in December
December, the first month of the winter in Swan, is also a wintry month, with an average temperature varying between 22.8°F (-5.1°C) and 34.3°F (1.3°C). December implies a gentle temperature shift, with average high-temperatures reducing from November's frosty 47.1°F (8.4°C) to a cold 34.3°F (1.3°C). Weather in December »
Updated: Aug 7, 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 in Swan?
In Swan, January is known for its average lowest temperatures, reaching a high of 28.4°F (-2°C) and a low of 15.1°F (-9.4°C).
What is the most humid month?
With an average relative humidity of 83%, January is the most humid month.
What is the driest month?
January and December are months with the least rain when the rain falls for 3.8 days and typically aggregates up to 0.39" (10mm) of rain.
How much does it rain?
Throughout the year, there are 109.9 rainfall days, and 12.72" (323mm) of precipitation is accumulated.
When does it snow in Swan?
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 8.8 days and accumulates 1.97" (50mm) of snow.
How many days does it snow?
In Swan, during the entire year, snow falls for 28.4 days and aggregates up to 5.71" (145mm) of snow.
What is the month with the least sunshine?
With an average of 4.2h of sunshine, January has the least sunshine of the year.
When is 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 wettest month?
May is the month with the most rainfall. Rain falls for 15.3 days and accumulates 2.28" (58mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days in Swan?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What is the month with the highest UV index in Swan?
The months with the highest UV index in Swan are June through August, with an average maximum UV index of 6.
What time of the year is the hottest?
July, recognised by an average high temperature of 82.9°F (28.3°C) and a low of 65.1°F (18.4°C), is Swan's warmest month.
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.5h of sunshine.
What is the least humid month?
The least humid month is October, with an average relative humidity of 71%.
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
Swan, IA
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (28.4°F).
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure
Swan, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"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:
29.97"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:
30.12"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
Swan, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.9mph - Average wind speed in October:
9.5mph - 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 and April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity
Swan, IA
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Swan, IA
- Average rainfall in January:
0.39" - Average rainfall in February:
0.43" - Average rainfall in March:
0.83" - Average rainfall in April:
1.1" - Average rainfall in May:
2.28" - Average rainfall in June:
2.05"
- Average rainfall in July:
1.22" - Average rainfall in August:
1.26" - Average rainfall in September:
1.42" - Average rainfall in October:
0.75" - Average rainfall in November:
0.59" - Average rainfall in December:
0.39"
The wettest month (with the highest rainfall) is May (2.28").
The driest months (with the least rainfall) are January and December (0.39").
Average rainfall days
Swan, IA
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
11.9 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
14.6 days
- Average rainfall days in July:
12.3 days - Average rainfall days in August:
11.5 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
7.8 days - Average rainfall days in November:
6.1 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.3 days).
Average snowfall
Swan, IA
The month with the highest snowfall is January (1.97").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Swan, IA
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
7.2 days - Average snowfall days in March:
4.1 days - Average snowfall days in April:
0.8 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:
0.5 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
5.1 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Swan, 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 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 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 4min - 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 5min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
9h and 5min - 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 30min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Swan, IA
- Average sunshine days in January:
20.7 days - Average sunshine days in February:
19.2 days - Average sunshine days in March:
18.2 days - Average sunshine days in April:
15.9 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
15 days - Average sunshine days in August:
16.4 days - Average sunshine days in September:
17.9 days - Average sunshine days in October:
21.3 days - Average sunshine days in November:
21.7 days - Average sunshine days in December:
22.7 days
The month with the most sunshine days is December (22.7 days).
The month with the least sunshine days is June (10.9 days).
Average UV index
Swan, 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
Swan, IA
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July, August and September (Cloud cover 29).
Average visibility
Swan, IA
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Swan, Iowa, USA
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