Climate and monthly weather forecastArthur, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Arthur, Illinois, is a wintry winter month, with an average temperature ranging between min 21.6°F (-5.8°C) and max 33.4°F (0.8°C). The coldest temperatures occur during January, when averages reach a peak of 33.4°F (0.8°C) and a low of 21.6°F (-5.8°C). Weather in January »Weather in February
February, the last month of the winter in Arthur, is another cold month, with an average temperature ranging between min 25.2°F (-3.8°C) and max 37.9°F (3.3°C). Arthur, Illinois, experiences a transition to a still cold 37.9°F (3.3°C) in average high-temperatures with the arrival of February, not greatly differing from January's 33.4°F (0.8°C). Weather in February »Weather in March
March, the first month of the spring in Arthur, is a cool month, with an average temperature fluctuating between 50.4°F (10.2°C) and 35.8°F (2.1°C). March's onset brings a rise in the average high-temperature, moving from an icy 37.9°F (3.3°C) in February to a cool 50.4°F (10.2°C). Weather in March »Weather in April
April is an enjoyable spring month in Arthur, Illinois, with an average temperature fluctuating between 62.2°F (16.8°C) and 46°F (7.8°C). April's arrival brings a temperature shift, moving from a fresh 50.4°F (10.2°C) in March to a comfortable 62.2°F (16.8°C). Weather in April »Weather in May
May, the last month of the spring in Arthur, is an agreeable month, with an average temperature varying between 72.9°F (22.7°C) and 56.7°F (13.7°C). Arthur's weather in May presents a rise in the average high-temperature, moving from a refreshing 62.2°F (16.8°C) in April to an agreeable 72.9°F (22.7°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Arthur, Illinois, with an average temperature ranging between max 81°F (27.2°C) and min 64°F (17.8°C). With the onset of June, the average high-temperature subtly transitions from an agreeable 72.9°F (22.7°C) in May to a warm 81°F (27.2°C). Weather in June »Weather in July
July, like June, in Arthur, Illinois, is a moderately hot summer month, with an average temperature varying between 82°F (27.8°C) and 65.7°F (18.7°C). July temperatures tend to peak at an average high of 82°F (27.8°C) and dip to a low of 65.7°F (18.7°C). The heat index value during July is calculated to be a hot 89.6°F (32°C). Weather in July »Weather in August
August, the last month of the summer in Arthur, is also a moderately hot month, with an average temperature varying between 63.9°F (17.7°C) and 81.1°F (27.3°C). The arrival of August sees a recorded average high-temperature of a still moderately hot 81.1°F (27.3°C), showing little divergence from the previous month's conditions. Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Arthur, Illinois, with an average temperature ranging between min 58.5°F (14.7°C) and max 77.2°F (25.1°C). The commencement of September brings an average high-temperature of a still moderately hot 77.2°F (25.1°C), marking an inconsequential divergence from August. Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in Arthur, Illinois, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 63.9°F (17.7°C). The onset of October comes with a shift in the average high-temperature, falling from a warm 77.2°F (25.1°C) in September to a comfortable 63.9°F (17.7°C). Weather in October »Weather in November
November, the last month of the autumn in Arthur, is also a frosty month, with an average temperature fluctuating between 36.1°F (2.3°C) and 49.6°F (9.8°C). November suggests a modest reduction in the average high-temperature, shifting from a comfortable 63.9°F (17.7°C) in October to a chilly 49.6°F (9.8°C). Weather in November »Weather in December
December, the first month of the winter in Arthur, is also a wintry month, with temperature in the range of an average high of 38.5°F (3.6°C) and an average low of 28.2°F (-2.1°C). Arthur in December experiences a subtle temperature decline, with average high-temperatures reducing from a chilly 49.6°F (9.8°C) in November to a cold 38.5°F (3.6°C). Weather in December »Updated: Aug 16, 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
January, noted for its average high-temperature of 33.4°F (0.8°C) and an average low-temperature of 21.6°F (-5.8°C), is considered the coldest month.
Throughout the year, there are 144.2 rainfall days, and 22.4" (569mm) of precipitation is accumulated.
January through April, November and December are months with snowfall.
In Arthur, during the entire year, snow falls for 25.8 days and aggregates up to 6.38" (162mm) of snow.
The month with the least sunshine is January, with an average of 4.1h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The months with the least rainfall are February and September Rain falls for 7.4 days and accumulates 1.26" (32mm) of rain.
The month with the most snowfall is February, when snow falls for 7.1 days and typically aggregates up to 1.89" (48mm) of snow.
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.
The month with the most rainfall is April, when the rain falls for 14.8 days and typically aggregates up to 2.72" (69mm) of precipitation.
In Arthur, snow does not fall in May through October.
June has the longest days of the year, with an average of 14h and 54min of daylight.
June has the most sunshine of the year, with an average of 10.4h of sunshine.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
Arthur's July weather, with an average high temperature of 82°F (27.8°C) and an average low temperature of 65.7°F (18.7°C), tends to be the warmest of the year.
The most humid month is July, with an average relative humidity of 84%.
The least humid month is October, with an average relative humidity of 70%.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Arthur, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Arthur, IL
- Average pressure in January:
30.15"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:
29.93"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:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Arthur, IL
- Average wind speed in January:
10.8mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.2mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.1mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity
Arthur, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Arthur, IL
- Average rainfall in January:
1.54" - Average rainfall in February:
1.26" - Average rainfall in March:
1.89" - Average rainfall in April:
2.72" - Average rainfall in May:
2.52" - Average rainfall in June:
2.36"
- Average rainfall in July:
2.17" - Average rainfall in August:
2.05" - Average rainfall in September:
1.26" - Average rainfall in October:
1.93" - Average rainfall in November:
1.42" - Average rainfall in December:
1.3"
The wettest month (with the highest rainfall) is April (2.72").
The driest months (with the least rainfall) are February and September (1.26").
Average rainfall days
Arthur, IL
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
7.4 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
15.2 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
11.9 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
8.5 days
The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is January (7.3 days).
Average snowfall
Arthur, IL
The month with the highest snowfall is February (1.89").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Arthur, IL
- Average snowfall days in January:
8.2 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
3 days - Average snowfall days in April:
0.5 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:
0.1 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
5.5 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Arthur, IL
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 6min - Average sunshine in February:
4h and 18min - Average sunshine in March:
6h and 18min - Average sunshine in April:
8h and 12min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 6min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Arthur, IL
- Average sunshine days in January:
17.3 days - Average sunshine days in February:
14.6 days - Average sunshine days in March:
15 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
10.9 days - Average sunshine days in June:
12.1 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
12.6 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
19 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (10.8 days).
Average UV index
Arthur, 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, February, November and December (UV index 2).
Average cloud cover
Arthur, IL
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility
Arthur, 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).
