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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, like December, in Swansea, Illinois, is an icy winter month, with an average temperature varying between 37.8°F (3.2°C) and 24.8°F (-4°C). In Swansea, the lowest average temperatures are observed in January, with a high of 37.8°F (3.2°C) and a low of 24.8°F (-4°C). Weather in January »
Weather in February
The last month of the winter, February, is also an icy month in Swansea, Illinois, with an average temperature varying between 27.9°F (-2.3°C) and 42.4°F (5.8°C). In February, Swansea experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 37.8°F (3.2°C) in January to a still icy 42.4°F (5.8°C). Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Swansea, Illinois, with an average temperature ranging between min 37.9°F (3.3°C) and max 54.5°F (12.5°C). With the arrival of March, the average high-temperature transitions from a wintry 42.4°F (5.8°C) in February to a cool 54.5°F (12.5°C). Weather in March »
Weather in April
April is an enjoyable spring month in Swansea, Illinois, with an average temperature fluctuating between 65.5°F (18.6°C) and 47.8°F (8.8°C). April's arrival brings a change in high-temperatures, moving from a cool 54.5°F (12.5°C) in March to an enjoyable 65.5°F (18.6°C). Weather in April »
Weather in May
May, the last month of the spring in Swansea, is a moderately hot month, with temperature in the range of an average high of 74.8°F (23.8°C) and an average low of 57.9°F (14.4°C). As Swansea transitions into May, a rise in the average high-temperature is observed, moving from an enjoyable 65.5°F (18.6°C) in April to a warm 74.8°F (23.8°C). Weather in May »
Weather in June
The first month of the summer, June, is also a moderately hot month in Swansea, Illinois, with an average temperature ranging between max 83.7°F (28.7°C) and min 66.6°F (19.2°C). In June, the meteorological conditions subtly change with the average high-temperature edging from a moderately hot 74.8°F (23.8°C) in May to a still warm 83.7°F (28.7°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Swansea, Illinois, with an average temperature fluctuating between 85.8°F (29.9°C) and 68.4°F (20.2°C). Swansea's temperature records reveal July as the warmest month, marked by average highs of 85.8°F (29.9°C) and lows of 68.4°F (20.2°C). The average heat index in July is evaluated at a fiery hot 98.6°F (37°C). Weather in July »
Weather in August
August, the last month of the summer in Swansea, is another warm month, with temperature in the range of an average high of 84.6°F (29.2°C) and an average low of 66°F (18.9°C). As July transitions into August, Swansea records an average high-temperature of a still moderately hot 84.6°F (29.2°C), showing a gentle shift from the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Swansea, Illinois, with an average temperature varying between 59.9°F (15.5°C) and 79.3°F (26.3°C). With the onset of September, the average high-temperature stands at a still warm 79.3°F (26.3°C), closely aligned with August's 84.6°F (29.2°C). Weather in September »
Weather in October
October, like September, in Swansea, Illinois, is another refreshing autumn month, with temperature in the range of an average high of 66.7°F (19.3°C) and an average low of 48.9°F (9.4°C). The onset of October comes with a shift in the average high-temperature, falling from a warm 79.3°F (26.3°C) in September to a comfortable 66.7°F (19.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Swansea, is also a fresh month, with an average temperature varying between 37.8°F (3.2°C) and 53.4°F (11.9°C). November brings a minor decrease, with the average high-temperature reducing from an enjoyable 66.7°F (19.3°C) in October to a fresh 53.4°F (11.9°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Swansea, Illinois, with an average temperature varying between 42.6°F (5.9°C) and 30.6°F (-0.8°C). During Swansea's transition into December, the average high-temperature lessens, moving from a fresh 53.4°F (11.9°C) in November to a cold 42.6°F (5.9°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Swansea?
The month of January, characterized by an average high of 37.8°F (3.2°C) and a low of 24.8°F (-4°C), is recognized as the coldest.
How much does it rain in Swansea?
In Swansea, during the entire year, the rain falls for 147.1 days and collects up to 35.43" (900mm) of precipitation.
When does it snow in Swansea?
Months with snowfall in Swansea, Illinois, are January through March, November and December.
What is the snowiest month in Swansea?
The month with the most snowfall is January, when snow falls for 7.3 days and typically aggregates up to 2.4" (61mm) of snow.
How much does it snow in Swansea?
Throughout the year, there are 21.1 snowfall days, and 8.11" (206mm) of snow is accumulated.
What is the month with the least sunshine in Swansea?
January has the least sunshine of the year in Swansea, Illinois, with an average of 4.5h of sunshine.
When is the lowest UV index in Swansea?
The months with the lowest UV index in Swansea, Illinois, are January, February and December, with an average maximum UV index of 2.
What is the driest month in Swansea?
The month with the least rainfall in Swansea, Illinois, is February, when the rain falls for 7.8 days and typically collects 1.93" (49mm) of precipitation.
When is Daylight Saving Time (DST) in Swansea?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Swansea, Illinois, 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.
When it does not snow in Swansea?
April through October are months without snowfall in Swansea.
What are the most humid months in Swansea?
The months with the highest humidity are May and July, with an average relative humidity of 79%.
What is the rainiest month in Swansea?
May is the month with the most rainfall in Swansea, Illinois. Rain falls for 16.4 days and accumulates 4.37" (111mm) of precipitation.
What is the month with the highest UV index in Swansea?
The months with the highest UV index in Swansea are May through August, with an average maximum UV index of 6.
When are the longest days in Swansea?
With an average of 14h and 48min of daylight, June has the longest days of the year in Swansea.
What month has the most sunshine in Swansea?
June has the most sunshine of the year, with an average of 10.3h of sunshine.
What is the warmest month in Swansea?
Swansea's July weather, marked by an average high temperature of 85.8°F (29.9°C) and an average low temperature of 68.4°F (20.2°C), is the warmest in the year.
What is the least humid month in Swansea?
October is the least humid month, with an average relative humidity of 71%.
What is the month with the shortest days in Swansea?
December has the shortest days of the year in Swansea, with an average of 9h and 30min of daylight.
Average temperature
Swansea, IL
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (37.8°F).
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure
Swansea, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"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 (29.92"Hg).
Average wind speed
Swansea, IL
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.3mph - Average wind speed in March:
9.1mph - Average wind speed in April:
9.1mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.1mph - Average wind speed in October:
7.9mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.7mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity
Swansea, IL
The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Swansea, IL
- Average rainfall in January:
2.32" - Average rainfall in February:
1.93" - Average rainfall in March:
2.72" - Average rainfall in April:
3.78" - Average rainfall in May:
4.37" - Average rainfall in June:
3.98"
- Average rainfall in July:
3.43" - Average rainfall in August:
3.31" - Average rainfall in September:
2.2" - Average rainfall in October:
2.95" - Average rainfall in November:
2.17" - Average rainfall in December:
2.28"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days
Swansea, IL
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
16.4 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
12.9 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
10.6 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
8.4 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (6.8 days).
Average snowfall
Swansea, IL
The month with the highest snowfall is January (2.4").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Swansea, IL
- Average snowfall days in January:
7.3 days - Average snowfall days in February:
6 days - Average snowfall days in March:
2.1 days - Average snowfall days in April:
0.3 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:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.2 days - Average snowfall days in December:
4 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Swansea, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Swansea, IL
- Average sunshine days in January:
17.5 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
13.7 days - Average sunshine days in April:
13.1 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
13.3 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
16.2 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
18.3 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
18.2 days
The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is May (12.3 days).
Average UV index
Swansea, IL
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Swansea, IL
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility
Swansea, IL
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).
Swansea, Illinois, USA
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