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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 Bartlett, Illinois, is another subzero cold winter month, with an average temperature varying between 27.7°F (-2.4°C) and 16.3°F (-8.7°C). January is the coldest month, exhibiting average temperatures of 27.7°F (-2.4°C) at the peak and 16.3°F (-8.7°C) at the base. Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Bartlett, Illinois, with temperature in the range of an average low of 19°F (-7.2°C) and an average high of 31.6°F (-0.2°C). February's commencement is accompanied by an average high-temperature of a still freezing cold 31.6°F (-0.2°C), diverging marginally from January's 27.7°F (-2.4°C). Weather in February »
Weather in March
March, the first month of the spring in Bartlett, is a frosty month, with an average temperature ranging between max 44.2°F (6.8°C) and min 30.6°F (-0.8°C). In Bartlett, stepping into March brings a temperature increase, moving up from February's freezing cold 31.6°F (-0.2°C) to a chilly 44.2°F (6.8°C). Weather in March »
Weather in April
April is a mild spring month in Bartlett, Illinois, with temperature in the range of an average low of 39.9°F (4.4°C) and an average high of 55.8°F (13.2°C). The arrival of April brings a change in Bartlett's weather, with average high-temperatures moving from March's frosty 44.2°F (6.8°C) to a mild 55.8°F (13.2°C). Weather in April »
Weather in May
May, the last month of the spring in Bartlett, is an agreeable month, with an average temperature varying between 68°F (20°C) and 51.1°F (10.6°C). Bartlett sees an increase in average high-temperatures during May, moving from a mild 55.8°F (13.2°C) in April to a pleasant 68°F (20°C). Weather in May »
Weather in June
June, the first month of the summer in Bartlett, is a warm month, with an average temperature ranging between min 59.9°F (15.5°C) and max 77.4°F (25.2°C). June witnesses an increase in the average high-temperature, moving from a pleasant 68°F (20°C) in May to a moderately hot 77.4°F (25.2°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Bartlett, Illinois, with an average temperature fluctuating between 64.9°F (18.3°C) and 81.3°F (27.4°C). With its high average temperature of 81.3°F (27.4°C) and a low of 64.9°F (18.3°C), July is regarded as the warmest month. For most parts of July, the heat index is calculated to be a tropical 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Bartlett, Illinois, with an average temperature ranging between min 63.7°F (17.6°C) and max 79.9°F (26.6°C). August's presence records an average high-temperature of a still moderately hot 79.9°F (26.6°C), closely mirroring July's climate. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Bartlett, Illinois, with an average temperature fluctuating between 56.8°F (13.8°C) and 73.4°F (23°C). The transition into September subtly indicates a reduction in the average high-temperature, down to a still warm 73.4°F (23°C) from August's 79.9°F (26.6°C). Weather in September »
Weather in October
October, the same as September, in Bartlett, Illinois, is another refreshing autumn month, with an average temperature fluctuating between 45.3°F (7.4°C) and 60.3°F (15.7°C). With the onset of October, Bartlett's average high-temperature adjusts, receding from September's warm 73.4°F (23°C) to a refreshing 60.3°F (15.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Bartlett, is another chilly month, with temperature in the range of an average high of 45.5°F (7.5°C) and an average low of 32.7°F (0.4°C). The arrival of November is marked by a notable decrease in high-temperatures, falling from a moderate 60.3°F (15.7°C) in October to a frosty 45.5°F (7.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Bartlett, Illinois, with an average temperature fluctuating between 34°F (1.1°C) and 23.9°F (-4.5°C). The beginning of December marks a decrease in the average high-temperature, transitioning from a chilly 45.5°F (7.5°C) in November to a cold 34°F (1.1°C). Weather in December »
Updated: Jul 8, 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 are the coldest months?
January is the coldest month, with the temperature often reaching an average high of 27.7°F (-2.4°C) and an average low of 16.3°F (-8.7°C).
What are the most humid months?
January and February, with an average relative humidity of 83%, are most humid months.
How many days does it rain?
In Bartlett, during the entire year, the rain falls for 141.5 days and collects up to 22.76" (578mm) of precipitation.
When does it snow?
Months with snowfall in Bartlett are January through May, October through December.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 12.3 days and typically aggregates up to 3.39" (86mm) of snow.
How many days does it snow?
In Bartlett, during the entire year, snow falls for 46.4 days and aggregates up to 13.03" (331mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year in Bartlett, with an average of 3.6h of sunshine.
What are the months with the lowest UV index in Bartlett?
January 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 rainiest month?
The month with the most rainfall is May, when the rain falls for 16.8 days and typically aggregates up to 2.83" (72mm) of precipitation.
When it does not snow?
June through September are months without snowfall in Bartlett.
When are the longest days in Bartlett?
The month with the longest days is June, with an average of 15h and 12min of daylight.
When is the highest UV index?
The months with the highest UV index in Bartlett are June through August, with an average maximum UV index of 6.
What are the warmest months in Bartlett?
July is the month when Bartlett experiences its warmest temperatures, averaging a high of 81.3°F (27.4°C) and a low of 64.9°F (18.3°C).
What is the month with the most sunshine?
July and August, with an average of 9.8h of sunshine, are months with the most sunshine in Bartlett, Illinois.
What is the least humid month?
The least humid month is October, with an average relative humidity of 74%.
What is the driest month in Bartlett?
December is the month with the least rainfall in Bartlett. Rain falls for 7.2 days and accumulates 1.02" (26mm) of precipitation.
What is the month with the shortest days?
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Bartlett, IL
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (27.7°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure
Bartlett, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"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:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Bartlett, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.3mph - Average wind speed in December:
9.2mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Bartlett, IL
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Bartlett, IL
- Average rainfall in January:
1.22" - Average rainfall in February:
1.26" - Average rainfall in March:
1.3" - Average rainfall in April:
2.64" - Average rainfall in May:
2.83" - Average rainfall in June:
2.76"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.02").
Average rainfall days
Bartlett, IL
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
4.8 days - Average rainfall days in March:
10.5 days - Average rainfall days in April:
15.1 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
7.2 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (4.8 days).
Average snowfall
Bartlett, IL
- Average snowfall in January:
3.39" - Average snowfall in February:
3.27" - Average snowfall in March:
1.06" - Average snowfall in April:
2.05" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Bartlett, IL
- Average snowfall days in January:
12.3 days - Average snowfall days in February:
10.9 days - Average snowfall days in March:
6.3 days - Average snowfall days in April:
2.2 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:
3.5 days - Average snowfall days in December:
10.6 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Bartlett, IL
- 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 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Bartlett, IL
- Average sunshine days in January:
14.3 days - Average sunshine days in February:
11.9 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
11.3 days - Average sunshine days in May:
11.4 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
15 days - Average sunshine days in November:
17.6 days - Average sunshine days in December:
15.6 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is July (10.9 days).
Average UV index
Bartlett, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Bartlett, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July, August and September (Cloud cover 33).
Average visibility
Bartlett, IL
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Bartlett, Illinois, USA
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