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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 Raritan, Illinois, is a freezing cold winter month, with an average temperature ranging between min 18.7°F (-7.4°C) and max 30.9°F (-0.6°C). January, known for its average high temperature of 30.9°F (-0.6°C) and an average low temperature of 18.7°F (-7.4°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Raritan, Illinois, with an average temperature fluctuating between 22.3°F (-5.4°C) and 35.8°F (2.1°C). The commencement of February records an average high-temperature of a wintry 35.8°F (2.1°C), barely varying from January's 30.9°F (-0.6°C). Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Raritan, Illinois, with an average temperature ranging between max 49.6°F (9.8°C) and min 34.2°F (1.2°C). The onset of March brings a rise in the average high-temperature, elevating from an icy 35.8°F (2.1°C) in February to a frosty 49.6°F (9.8°C). Weather in March »
Weather in April
April is a comfortable spring month in Raritan, Illinois, with an average temperature varying between 61.3°F (16.3°C) and 44.2°F (6.8°C). The onset of April brings a temperature shift, with the average high-temperature moving from a chilly 49.6°F (9.8°C) in March to a comfortable 61.3°F (16.3°C). Weather in April »
Weather in May
May, the last month of the spring in Raritan, is a pleasant month, with an average temperature varying between 71.6°F (22°C) and 54.9°F (12.7°C). Raritan's May weather shows an increase in high-temperatures, moving from April's comfortable 61.3°F (16.3°C) to an agreeable 71.6°F (22°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Raritan, Illinois, with an average temperature fluctuating between 80.4°F (26.9°C) and 63.7°F (17.6°C). Raritan in June experiences a slight uptick in the average high-temperature, adjusting from May's agreeable 71.6°F (22°C) to a moderately hot 80.4°F (26.9°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Raritan, Illinois, with an average temperature fluctuating between 82.6°F (28.1°C) and 66.2°F (19°C). With average temperatures fluctuating between a high of 82.6°F (28.1°C) and a low of 66.2°F (19°C), July stands out as the warmest month. For July, the heat index is calculated 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 Raritan, Illinois, with an average temperature ranging between min 63.7°F (17.6°C) and max 82.2°F (27.9°C). The arrival of August marks a slight shift to an average high-temperature of a still warm 82.2°F (27.9°C) from July's 82.6°F (28.1°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Raritan, Illinois, with an average temperature varying between 76.8°F (24.9°C) and 57.4°F (14.1°C). Raritan in September undergoes a slight reduction in the average high-temperature, shifting from August's 82.2°F (27.9°C) to a still warm 76.8°F (24.9°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Raritan, Illinois, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 63°F (17.2°C). Raritan experiences a temperature shift at the start of October, with average high-temperatures adjusting 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 also a frosty month in Raritan, Illinois, with an average temperature varying between 34.7°F (1.5°C) and 48.9°F (9.4°C). In Raritan, the average high-temperature in November drops from an enjoyable 63°F (17.2°C) in October to a frosty 48.9°F (9.4°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Raritan, Illinois, with an average temperature ranging between max 37°F (2.8°C) and min 25.5°F (-3.6°C). The commencement of December indicates a shift in the average high-temperature, receding from November's frosty 48.9°F (9.4°C) to a cold 37°F (2.8°C). Weather in December »
[Resources]Frequently asked questions
What time of the year is the coldest in Raritan?
The coldest time of the year is January, with temperatures averaging a high of 30.9°F (-0.6°C) and a low of 18.7°F (-7.4°C).
What is the driest month in Raritan?
The month with the least rainfall in Raritan is January, when the rain falls for 4.3 days and typically collects 0.83" (21mm) of precipitation.
How much does it rain in Raritan?
In Raritan, during the entire year, the rain falls for 127.6 days and collects up to 21.02" (534mm) of precipitation.
When does it snow in Raritan?
Months with snowfall are January through April, October through December.
When does it snow the most in Raritan?
January is the month with the most snowfall in Raritan. Snow falls for 8.5 days and accumulates 3.15" (80mm) of snow.
How much does it snow in Raritan?
In Raritan, Illinois, during the entire year, snow falls for 26.4 days and aggregates up to 9.06" (230mm) of snow.
What is the month with the least sunshine in Raritan?
The month with the least sunshine is January, with an average of 4.1h of sunshine.
What are the months with the lowest UV index in Raritan?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
When is Daylight Saving Time (DST) in Raritan?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Raritan, 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.
What is the rainiest month in Raritan?
May is the month with the most rainfall in Raritan. Rain falls for 17.5 days and accumulates 3.11" (79mm) of precipitation.
When it does not snow in Raritan?
In Raritan, Illinois, snow does not fall in May through September.
When are the longest days in Raritan?
The month with the longest days is June, with an average of 15h and 0min of daylight.
What is the month with the most sunshine in Raritan?
The months with the most sunshine in Raritan, Illinois, are June and July, with an average of 10h of sunshine.
What are the months with the highest UV index in Raritan?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the warmest month in Raritan?
Raritan, Illinois, experiences its highest temperatures in July, with an average peak of 82.6°F (28.1°C) and a low of 66.2°F (19°C).
What is the most humid month in Raritan?
July is the most humid month in Raritan, with an average relative humidity of 83%.
What is the least humid month in Raritan?
The least humid month in Raritan is October, with an average relative humidity of 71%.
What is the month with the shortest days in Raritan?
December has the shortest days of the year in Raritan, Illinois, with an average of 9h and 18min of daylight.
Average temperature
Raritan, 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 (30.9°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 (18.7°F).
Average pressure
Raritan, 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:
30.1"Hg - Average pressure in December:
30.11"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
Raritan, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.7mph - Average wind speed in September:
7.6mph - 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 (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity
Raritan, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Raritan, IL
- Average rainfall in January:
0.83" - Average rainfall in February:
1.1" - Average rainfall in March:
1.69" - Average rainfall in April:
2.4" - Average rainfall in May:
3.11" - Average rainfall in June:
2.44"
- Average rainfall in July:
2.13" - Average rainfall in August:
1.69" - Average rainfall in September:
1.77" - Average rainfall in October:
1.46" - Average rainfall in November:
1.42" - Average rainfall in December:
0.98"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days
Raritan, IL
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4.6 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
15 days - Average rainfall days in August:
11.7 days - Average rainfall days in September:
10.2 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
5.6 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.3 days).
Average snowfall
Raritan, IL
The month with the highest snowfall is January (3.15").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Raritan, IL
- Average snowfall days in January:
8.5 days - Average snowfall days in February:
6.2 days - Average snowfall days in March:
3.8 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:
5.4 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Raritan, 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 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:
9h and 5min - 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 18min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 3min
The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Raritan, IL
- Average sunshine days in January:
19.7 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
15.5 days - Average sunshine days in April:
15.1 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
14.4 days - Average sunshine days in August:
17.2 days - Average sunshine days in September:
18.4 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
20 days
The month with the most sunshine days is December (20 days).
The months with the least sunshine days are May and June (11.8 days).
Average UV index
Raritan, 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
Raritan, IL
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility
Raritan, 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).
Raritan, Illinois, USA
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