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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 Monmouth, Illinois, with an average temperature fluctuating between 29.7°F (-1.3°C) and 17.6°F (-8°C). January, with an average high of 29.7°F (-1.3°C) and a low of 17.6°F (-8°C), signifies the coldest month of the year. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Monmouth, Illinois, with an average temperature fluctuating between 34.9°F (1.6°C) and 21.6°F (-5.8°C). February's onset records an average high-temperature of a wintry 34.9°F (1.6°C), a near match to January's 29.7°F (-1.3°C). Weather in February »
Weather in March
March, the first month of the spring in Monmouth, is a frosty month, with an average temperature ranging between max 48°F (8.9°C) and min 33.3°F (0.7°C). The onset of March brings a temperature shift, with the average high-temperature moving from an icy 34.9°F (1.6°C) in February to a chilly 48°F (8.9°C). Weather in March »
Weather in April
April is a moderate spring month in Monmouth, Illinois, with an average temperature fluctuating between 43.3°F (6.3°C) and 60.4°F (15.8°C). Monmouth, Illinois, sees a rise in temperature during April, with average high-temperatures transitioning from a frosty 48°F (8.9°C) in March to a moderate 60.4°F (15.8°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Monmouth, Illinois, with an average temperature fluctuating between 70.9°F (21.6°C) and 54.1°F (12.3°C). In Monmouth, the average high-temperature in May increases from a moderate 60.4°F (15.8°C) in April to a pleasant 70.9°F (21.6°C). Weather in May »
Weather in June
June, the first month of the summer in Monmouth, is a moderately hot month, with an average temperature varying between 79.5°F (26.4°C) and 63.1°F (17.3°C). June's arrival signals a subtle increase in average high-temperatures, moving from May's pleasant 70.9°F (21.6°C) to a warm 79.5°F (26.4°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Monmouth, Illinois, with an average temperature varying between 64.9°F (18.3°C) and 82°F (27.8°C). July, with average temperatures reaching a high of 82°F (27.8°C) and a low of 64.9°F (18.3°C), is the warmest month. For July, the heat index is calculated to be a hot 89.6°F (32°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Monmouth, Illinois, with an average temperature ranging between max 81.1°F (27.3°C) and min 63.3°F (17.4°C). The start of August marks an average high-temperature of a still warm 81.1°F (27.3°C), hardly distinguishable from the conditions in July. Weather in August »
Weather in September
September, the first month of the autumn in Monmouth, is also a moderately hot month, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 75.9°F (24.4°C). Monmouth transitions into September recording an average high-temperature of a still warm 75.9°F (24.4°C), closely aligning with the preceding month's temperature. Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Monmouth, Illinois, with an average temperature fluctuating between 45.9°F (7.7°C) and 61.7°F (16.5°C). With October's arrival, Monmouth sees a decrease in average high-temperatures, moving from a warm 75.9°F (24.4°C) in September to an enjoyable 61.7°F (16.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Monmouth, is also a frosty month, with temperature in the range of an average low of 34°F (1.1°C) and an average high of 47.5°F (8.6°C). As November commences, the average high-temperature shows a reduction, transitioning from an enjoyable 61.7°F (16.5°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 Monmouth, is still a cold month, with an average temperature varying between 35.6°F (2°C) and 24.6°F (-4.1°C). December is characterized by a reduction in the average high-temperature, from a frosty 47.5°F (8.6°C) in November to a cold 35.6°F (2°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Monmouth?
January is the coldest month in Monmouth, Illinois, with the temperature often reaching an average high of 29.7°F (-1.3°C) and an average low of 17.6°F (-8°C).
What is the driest month in Monmouth?
The month with the least rainfall is January, when the rain falls for 5.9 days and typically collects 1.46" (37mm) of precipitation.
How many days does it rain in Monmouth?
In Monmouth, during the entire year, the rain falls for 149.4 days and collects up to 30.16" (766mm) of precipitation.
When does it snow in Monmouth?
Months with snowfall are January through April, October through December.
When does it snow the most in Monmouth?
January is the month with the most snowfall. Snow falls for 10.9 days and accumulates 4.61" (117mm) of snow.
How many days does it snow in Monmouth?
In Monmouth, during the entire year, snow falls for 36.7 days and aggregates up to 15.31" (389mm) of snow.
What is the month with the least sunshine in Monmouth?
January has the least sunshine of the year in Monmouth, with an average of 4.1h of sunshine.
What is the month with the lowest UV index in Monmouth?
The month with the lowest UV index in Monmouth is January, with an average maximum UV index of 1.
When is Daylight Saving Time (DST) in Monmouth?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Monmouth, 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 Monmouth?
May is the month with the most rainfall in Monmouth, Illinois. Rain falls for 19 days and accumulates 4.25" (108mm) of precipitation.
When it does not snow in Monmouth?
In Monmouth, Illinois, snow does not fall in May through September.
When are the longest days in Monmouth?
The month with the longest days is June, with an average of 15h and 6min of daylight.
What month has the most sunshine in Monmouth?
The month with the most sunshine in Monmouth, Illinois, is June, with an average of 10.1h of sunshine.
What are the months with the highest UV index in Monmouth?
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 Monmouth?
In Monmouth, July is the warmest month, with temperatures averaging a high of 82°F (27.8°C) and a low of 64.9°F (18.3°C).
What is the most humid month in Monmouth?
The most humid month is July, with an average relative humidity of 84%.
What is the least humid month in Monmouth?
With an average relative humidity of 71%, October is the least humid month.
What is the month with the shortest days in Monmouth?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Monmouth, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°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 (17.6°F).
Average pressure
Monmouth, IL
- Average pressure in January:
30.14"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:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Monmouth, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
Monmouth, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Monmouth, IL
- Average rainfall in January:
1.46" - Average rainfall in February:
1.73" - Average rainfall in March:
2.2" - Average rainfall in April:
3.35" - Average rainfall in May:
4.25" - Average rainfall in June:
3.58"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days
Monmouth, IL
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
5.8 days - Average rainfall days in March:
13 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
19 days - Average rainfall days in June:
18.7 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
14 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (5.8 days).
Average snowfall
Monmouth, IL
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Monmouth, IL
- Average snowfall days in January:
10.9 days - Average snowfall days in February:
9.4 days - Average snowfall days in March:
4.3 days - Average snowfall days in April:
1 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:
0.4 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
8.2 days
The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Monmouth, 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:
4h and 1min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 3min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- 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 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Monmouth, IL
- Average sunshine days in January:
15.8 days - Average sunshine days in February:
14.4 days - Average sunshine days in March:
14.5 days - Average sunshine days in April:
12 days - Average sunshine days in May:
9.9 days - Average sunshine days in June:
9.2 days
- Average sunshine days in July:
9.9 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
18 days - Average sunshine days in December:
16.6 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (9.2 days).
Average UV index
Monmouth, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Monmouth, IL
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility
Monmouth, IL
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Monmouth, Illinois, USA
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