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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 Flanagan, Illinois, is another subzero cold winter month, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 30.2°F (-1°C). Flanagan's January weather, with an average high temperature of 30.2°F (-1°C) and an average low temperature of 18.5°F (-7.5°C), tends to be the coldest of the year. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Flanagan, Illinois, with an average temperature ranging between max 34.9°F (1.6°C) and min 21.7°F (-5.7°C). February notes an average high-temperature of an icy 34.9°F (1.6°C), subtly differing from January's 30.2°F (-1°C). Weather in February »
Weather in March
March, the first month of the spring in Flanagan, is a frosty month, with an average temperature varying between 33.4°F (0.8°C) and 47.5°F (8.6°C). March's arrival brings a change in high-temperatures, moving from a wintry 34.9°F (1.6°C) in February to a chilly 47.5°F (8.6°C). Weather in March »
Weather in April
April is a refreshing spring month in Flanagan, Illinois, with an average temperature varying between 43.7°F (6.5°C) and 59.7°F (15.4°C). As April arrives, a rise in the average high-temperature is observed, moving from a frosty 47.5°F (8.6°C) in March to a refreshing 59.7°F (15.4°C). Weather in April »
Weather in May
May, the last month of the spring in Flanagan, is a pleasant month, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 54.7°F (12.6°C). May brings a rise in the average high-temperature, transitioning from April's moderate 59.7°F (15.4°C) to an agreeable 71.2°F (21.8°C). Weather in May »
Weather in June
June, the first month of the summer in Flanagan, is a warm month, with an average temperature varying between 62.4°F (16.9°C) and 79.3°F (26.3°C). June's arrival is noted with a slight increase in the average high-temperature, moving from an agreeable 71.2°F (21.8°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 Flanagan, Illinois, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 81°F (27.2°C). Flanagan's warmest weather arrives in July, when temperatures average a high of 81°F (27.2°C) and a low of 64.6°F (18.1°C). Throughout July, the heat index is estimated at a hot 87.8°F (31°C). Weather in July »
Weather in August
August, the last month of the summer in Flanagan, is another warm month, with temperature in the range of an average low of 62.4°F (16.9°C) and an average high of 80.1°F (26.7°C). Flanagan's weather in August displays an average high-temperature of a still moderately hot 80.1°F (26.7°C), showing minor disparity from July's 81°F (27.2°C). Weather in August »
Weather in September
September, the first month of the autumn in Flanagan, is also a moderately hot month, with an average temperature ranging between min 57°F (13.9°C) and max 75.6°F (24.2°C). Stepping into September, Flanagan records an average high-temperature of a still moderately hot 75.6°F (24.2°C), almost consistent with August. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Flanagan, Illinois, with an average temperature varying between 46.6°F (8.1°C) and 62.2°F (16.8°C). Flanagan observes a minor decrease in the average high-temperature with the arrival of October, falling from September's moderately hot 75.6°F (24.2°C) to an enjoyable 62.2°F (16.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Flanagan, Illinois, with an average temperature fluctuating between 34.9°F (1.6°C) and 47.5°F (8.6°C). As Flanagan transitions into November, a noticeable drop in the average high-temperature is observed, falling from a refreshing 62.2°F (16.8°C) in October to a frosty 47.5°F (8.6°C). Weather in November »
Weather in December
December, the first month of the winter in Flanagan, is still a cold month, with an average temperature varying between 36.5°F (2.5°C) and 25.9°F (-3.4°C). December brings a decrease in the average high-temperature, shifting from a chilly 47.5°F (8.6°C) in November to an icy 36.5°F (2.5°C). Weather in December »
Updated: Feb 12, 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 is the coldest month in Flanagan?
The coldest period in Flanagan is January, when temperatures fluctuate between an average high of 30.2°F (-1°C) and a low of 18.5°F (-7.5°C).
What is the driest month in Flanagan?
January and February are months with the least rain when the rain falls for 4.3 days and typically aggregates up to 0.71" (18mm) of rain.
How much does it rain in Flanagan?
Throughout the year, in Flanagan, there are 125.3 rainfall days, and 15.71" (399mm) of precipitation is accumulated.
When does it snow in Flanagan?
Months with snowfall in Flanagan, Illinois, are January through April, October through December.
What is the snowiest month in Flanagan?
The month with the most snowfall is January, when snow falls for 10.2 days and typically aggregates up to 1.73" (44mm) of snow.
How many days does it snow in Flanagan?
Throughout the year, in Flanagan, there are 30.6 snowfall days, and 6.93" (176mm) of snow is accumulated.
What is the month with the least sunshine in Flanagan?
The month with the least sunshine is January, with an average of 3.8h of sunshine.
When is Daylight Saving Time (DST) in Flanagan?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Flanagan, 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 in Flanagan?
May is the month with the most rainfall. Rain falls for 16.8 days and accumulates 2.44" (62mm) of precipitation.
When it does not snow in Flanagan?
May through September are months without snowfall in Flanagan, Illinois.
When are the longest days in Flanagan?
The month with the longest days in Flanagan is June, with an average of 15h and 6min of daylight.
What is the month with the most sunshine in Flanagan?
June and August, with an average of 9.8h of sunshine, are months with the most sunshine.
When is the highest UV index in Flanagan?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What is the warmest month in Flanagan?
July, with an average high of 81°F (27.2°C) and a low of 64.6°F (18.1°C), signifies the warmest month of the year in Flanagan.
What is the most humid month in Flanagan?
July is the most humid month, with an average relative humidity of 85%.
What is the least humid month in Flanagan?
With an average relative humidity of 71%, October is the least humid month in Flanagan, Illinois.
What is the month with the shortest days in Flanagan?
With an average of 9h and 18min of daylight, December has the shortest days of the year in Flanagan, Illinois.
When is the lowest UV index in Flanagan?
The month with the lowest UV index is December, with an average maximum UV index of 1.
Average temperature
Flanagan, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.2°F).
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure
Flanagan, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"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:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Flanagan, IL
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.2mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Flanagan, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Flanagan, IL
- Average rainfall in January:
0.71" - Average rainfall in February:
0.71" - Average rainfall in March:
1.18" - Average rainfall in April:
1.77" - Average rainfall in May:
2.44" - Average rainfall in June:
1.93"
- Average rainfall in July:
1.81" - Average rainfall in August:
1.3" - Average rainfall in September:
1.06" - Average rainfall in October:
1.26" - Average rainfall in November:
0.79" - Average rainfall in December:
0.75"
The wettest month (with the highest rainfall) is May (2.44").
The driest months (with the least rainfall) are January and February (0.71").
Average rainfall days
Flanagan, IL
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4.7 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
13 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
14.6 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
6.7 days - Average rainfall days in December:
6.2 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.3 days).
Average snowfall
Flanagan, IL
The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Flanagan, IL
- Average snowfall days in January:
10.2 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 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:
0.2 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
6.3 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Flanagan, 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 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 2min
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 18min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 2min
The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Flanagan, IL
- Average sunshine days in January:
18.5 days - Average sunshine days in February:
16.7 days - Average sunshine days in March:
15.9 days - Average sunshine days in April:
14 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
11.9 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
17.8 days - Average sunshine days in October:
19.1 days - Average sunshine days in November:
20.5 days - Average sunshine days in December:
19.3 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (11.3 days).
Average UV index
Flanagan, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Flanagan, IL
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
Flanagan, IL
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).
Flanagan, Illinois, USA
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