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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, is a freezing cold winter month in Plymouth, Illinois, with an average temperature varying between 19°F (-7.2°C) and 31.1°F (-0.5°C). Plymouth's January weather reaches an average high of 31.1°F (-0.5°C) and an average low of 19°F (-7.2°C), making it the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Plymouth, Illinois, with an average temperature fluctuating between 36.1°F (2.3°C) and 22.5°F (-5.3°C). The shift into February records an average high-temperature of a cold 36.1°F (2.3°C), subtly varied from January's 31.1°F (-0.5°C). Weather in February »
Weather in March
March, the first month of the spring in Plymouth, is a chilly month, with an average temperature varying between 49.6°F (9.8°C) and 34.3°F (1.3°C). Plymouth's transition into March sees a rise in the average high-temperature, advancing from a wintry 36.1°F (2.3°C) in February to a chilly 49.6°F (9.8°C). Weather in March »
Weather in April
April in Plymouth, Illinois, is a refreshing spring month, with an average temperature fluctuating between 44.2°F (6.8°C) and 61.3°F (16.3°C). April's arrival coincides with a rise in the average high-temperature, moving from March's chilly 49.6°F (9.8°C) to a refreshing 61.3°F (16.3°C). Weather in April »
Weather in May
May, the last month of the spring in Plymouth, is an agreeable month, with an average temperature ranging between min 54.9°F (12.7°C) and max 71.6°F (22°C). The shift from April to May is marked by an increase in the average high-temperature, moving from a comfortable 61.3°F (16.3°C) to a pleasant 71.6°F (22°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Plymouth, Illinois, with temperature in the range of an average high of 80.4°F (26.9°C) and an average low of 63.7°F (17.6°C). A gentle upsurge in temperatures occurs as May gives way to June, with average highs shifting from an agreeable 71.6°F (22°C) to a moderately hot 80.4°F (26.9°C). Weather in June »
Weather in July
July, like June, in Plymouth, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 82.6°F (28.1°C) and 66.2°F (19°C). Plymouth's temperatures peak on average in July, reaching 82.6°F (28.1°C) at their highest and 66.2°F (19°C) at their lowest. The heat index in July is computed to be a hot 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Plymouth, Illinois, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 63.7°F (17.6°C). August is marked by an average high-temperature of a still warm 82°F (27.8°C), almost identical to the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Plymouth, is also a moderately hot month, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 76.8°F (24.9°C). As August turns into September, the average high-temperatures rest at a still warm 76.8°F (24.9°C), showing a minor variation from the prior month. Weather in September »
Weather in October
October, like September, in Plymouth, Illinois, is another refreshing autumn month, with an average temperature varying between 46°F (7.8°C) and 63°F (17.2°C). The arrival of October indicates a decrease in the average high-temperature, moving from a warm 76.8°F (24.9°C) in September to a comfortable 63°F (17.2°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Plymouth, Illinois, with an average temperature ranging between max 49.1°F (9.5°C) and min 34.7°F (1.5°C). The arrival of November corresponds with a reduction in the average high-temperature, down from October's comfortable 63°F (17.2°C) to a frosty 49.1°F (9.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Plymouth, Illinois, with temperature in the range of an average low of 25.9°F (-3.4°C) and an average high of 37°F (2.8°C). The commencement of December involves a temperature shift, with the average high-temperature dropping from a frosty 49.1°F (9.5°C) in November to a wintry 37°F (2.8°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Plymouth?
January stands out as Plymouth's coldest month, with temperatures ranging between an average high of 31.1°F (-0.5°C) and a low of 19°F (-7.2°C).
How much does it rain in Plymouth?
In Plymouth, during the entire year, the rain falls for 94.4 days and collects up to 7.76" (197mm) of precipitation.
When does it snow in Plymouth?
Months with snowfall in Plymouth are January through April, October through December.
When does it snow the most in Plymouth?
January is the month with the most snowfall in Plymouth, Illinois. Snow falls for 6.3 days and accumulates 0.67" (17mm) of snow.
How much does it snow in Plymouth?
Throughout the year, in Plymouth, there are 20.5 snowfall days, and 2.44" (62mm) of snow is accumulated.
What is the month with the least sunshine in Plymouth?
With an average of 4.1h of sunshine, January has the least sunshine of the year in Plymouth, Illinois.
When is the lowest UV index in Plymouth?
January is the month with the lowest UV index in Plymouth, Illinois, with an average maximum UV index of 1.
When is Daylight Saving Time (DST) in Plymouth?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Plymouth, 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 in Plymouth?
The month with the most rainfall in Plymouth, Illinois, is May, when the rain falls for 12.3 days and typically aggregates up to 1.1" (28mm) of precipitation.
When it does not snow in Plymouth?
In Plymouth, snow does not fall in May through September.
When are the longest days in Plymouth?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What is the month with the most sunshine in Plymouth?
June and July, with an average of 10.2h of sunshine, are months with the most sunshine in Plymouth.
What are the months with the highest UV index in Plymouth?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What time of the year is the hottest in Plymouth?
The average temperatures in Plymouth, Illinois, reach their apex in July, averaging 82.6°F (28.1°C) at the high end and 66.2°F (19°C) at the low end.
What is the most humid month in Plymouth?
With an average relative humidity of 83%, July is the most humid month in Plymouth.
What is the least humid month in Plymouth?
October is the least humid month in Plymouth, Illinois, with an average relative humidity of 71%.
What is the driest month in Plymouth?
The month with the least rainfall is December, when the rain falls for 4.3 days and typically collects 0.35" (9mm) of precipitation.
What is the month with the shortest days in Plymouth?
December has the shortest days of the year in Plymouth, with an average of 9h and 24min of daylight.
Average temperature
Plymouth, IL
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (31.1°F).
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure
Plymouth, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"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:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Plymouth, IL
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.2mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity
Plymouth, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Plymouth, IL
- Average rainfall in January:
0.39" - Average rainfall in February:
0.39" - Average rainfall in March:
0.59" - Average rainfall in April:
0.79" - Average rainfall in May:
1.1" - Average rainfall in June:
0.83"
- Average rainfall in July:
0.67" - Average rainfall in August:
0.59" - Average rainfall in September:
0.87" - Average rainfall in October:
0.71" - Average rainfall in November:
0.47" - Average rainfall in December:
0.35"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days
Plymouth, IL
- Average rainfall days in January:
3.3 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
8.7 days - Average rainfall days in April:
10.9 days - Average rainfall days in May:
12.3 days - Average rainfall days in June:
11.8 days
- Average rainfall days in July:
10 days - Average rainfall days in August:
8.9 days - Average rainfall days in September:
7.7 days - Average rainfall days in October:
7.5 days - Average rainfall days in November:
5.4 days - Average rainfall days in December:
4.3 days
The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is January (3.3 days).
Average snowfall
Plymouth, IL
The month with the highest snowfall is January (0.67").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Plymouth, IL
- Average snowfall days in January:
6.3 days - Average snowfall days in February:
5.7 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.7 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:
0.3 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
3.7 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Plymouth, IL
- 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - 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 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 4min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Plymouth, IL
- Average sunshine days in January:
22.8 days - Average sunshine days in February:
20.5 days - Average sunshine days in March:
19.8 days - Average sunshine days in April:
17.5 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
13.9 days
- Average sunshine days in July:
15.3 days - Average sunshine days in August:
18.2 days - Average sunshine days in September:
20.4 days - Average sunshine days in October:
20.7 days - Average sunshine days in November:
21.8 days - Average sunshine days in December:
23.5 days
The month with the most sunshine days is December (23.5 days).
The month with the least sunshine days is June (13.9 days).
Average UV index
Plymouth, IL
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
Plymouth, IL
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Plymouth, 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).
Plymouth, Illinois, USA
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