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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, in Bethalto, Illinois, is another cold winter month, with an average temperature ranging between min 23.4°F (-4.8°C) and max 36.1°F (2.3°C). During the coldest month, January, temperatures average a high of 36.1°F (2.3°C) and a low of 23.4°F (-4.8°C). Weather in January »
Weather in February
February, the last month of the winter in Bethalto, is another cold month, with an average temperature fluctuating between 27.1°F (-2.7°C) and 41°F (5°C). During February, Bethalto records an average high-temperature of a still wintry 41°F (5°C), marking a slight divergence from January's 36.1°F (2.3°C). Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Bethalto, Illinois, with temperature in the range of an average high of 53.4°F (11.9°C) and an average low of 37.2°F (2.9°C). An upsurge in temperatures occurs as February gives way to March, with average highs shifting from a wintry 41°F (5°C) to a fresh 53.4°F (11.9°C). Weather in March »
Weather in April
April in Bethalto, Illinois, is a comfortable spring month, with an average temperature varying between 46.9°F (8.3°C) and 64.4°F (18°C). The arrival of April brings a change in Bethalto's weather, with average high-temperatures moving from March's cool 53.4°F (11.9°C) to an enjoyable 64.4°F (18°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Bethalto, Illinois, with an average temperature varying between 57°F (13.9°C) and 74.1°F (23.4°C). In Bethalto, the average high-temperature in May rises, from a comfortable 64.4°F (18°C) in April, to a moderately hot 74.1°F (23.4°C). Weather in May »
Weather in June
June, the first month of the summer in Bethalto, is still a warm month, with an average temperature fluctuating between 83.1°F (28.4°C) and 66.2°F (19°C). June signals a shift in the average high-temperature, moving from May's 74.1°F (23.4°C) to a still moderately hot 83.1°F (28.4°C). Weather in June »
Weather in July
July, like June, in Bethalto, Illinois, is another warm summer month, with an average temperature ranging between min 67.6°F (19.8°C) and max 85.3°F (29.6°C). July, known for its average high temperature of 85.3°F (29.6°C) and an average low temperature of 67.6°F (19.8°C), is the warmest month. July's heat index is estimated at a torrid 96.8°F (36°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Bethalto, Illinois, with an average temperature varying between 84°F (28.9°C) and 65.7°F (18.7°C). Bethalto, Illinois, indicates an average high-temperature of a still warm 84°F (28.9°C) in August, showing minor variation from July's 85.3°F (29.6°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Bethalto, Illinois, with an average temperature fluctuating between 78.6°F (25.9°C) and 59.4°F (15.2°C). With the beginning of September, the average high-temperature shows a small decrease, transitioning from a moderately hot 84°F (28.9°C) in August to a still warm 78.6°F (25.9°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Bethalto, Illinois, with an average temperature ranging between min 48.7°F (9.3°C) and max 65.3°F (18.5°C). In Bethalto, the beginning of October is marked by a lowered average high-temperature, shifting from September's moderately hot 78.6°F (25.9°C) to an enjoyable 65.3°F (18.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Bethalto, is also a fresh month, with an average temperature ranging between min 37°F (2.8°C) and max 52.2°F (11.2°C). November's arrival comes with a decrease in the average high-temperature, moving from a comfortable 65.3°F (18.5°C) in October to a fresh 52.2°F (11.2°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Bethalto, Illinois, with an average temperature ranging between min 29.8°F (-1.2°C) and max 41.4°F (5.2°C). The shift from November to December involves a decrease in the average high-temperature, dropping from a cool 52.2°F (11.2°C) to a cold 41.4°F (5.2°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 time of the year is the coldest in Bethalto?
Temperature records in Bethalto, Illinois, mark January as the coldest month, with highs averaging 36.1°F (2.3°C) and lows at 23.4°F (-4.8°C).
How many days does it rain in Bethalto?
Throughout the year, in Bethalto, there are 138 rainfall days, and 23.9" (607mm) of precipitation is accumulated.
When does it snow in Bethalto?
Months with snowfall in Bethalto, Illinois, are January through April, November and December.
How much does it snow in Bethalto?
In Bethalto, during the entire year, snow falls for 18.6 days and aggregates up to 4.53" (115mm) of snow.
What is the month with the least sunshine in Bethalto?
The months with the least sunshine in Bethalto are January and February, with an average of 4.5h of sunshine.
When is the lowest UV index in Bethalto?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month in Bethalto?
The month with the least rainfall is February, when the rain falls for 6.9 days and typically collects 1.14" (29mm) of precipitation.
When does it snow the most in Bethalto?
February is the month with the most snowfall in Bethalto, Illinois. Snow falls for 5.4 days and accumulates 1.61" (41mm) of snow.
When is Daylight Saving Time (DST) in Bethalto?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Bethalto, 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 wettest month in Bethalto?
The month with the most rainfall in Bethalto, Illinois, is May, when the rain falls for 16.6 days and typically aggregates up to 3.07" (78mm) of precipitation.
When it does not snow in Bethalto?
May through October are months without snowfall in Bethalto, Illinois.
When is the highest UV index in Bethalto?
May through August, with an average maximum UV index of 6, are months with the highest UV index in Bethalto.
When are the longest days in Bethalto?
The month with the longest days in Bethalto is June, with an average of 14h and 54min of daylight.
What month has the most sunshine in Bethalto?
The month with the most sunshine in Bethalto is June, with an average of 10.4h of sunshine.
What month is the hottest in Bethalto?
The month of July sees the average highest temperatures in Bethalto, reaching 85.3°F (29.6°C) at the peak and 67.6°F (19.8°C) at the low.
What is the most humid month in Bethalto?
With an average relative humidity of 80%, July is the most humid month.
What is the least humid month in Bethalto?
October is the least humid month in Bethalto, with an average relative humidity of 71%.
What is the month with the shortest days in Bethalto?
The month with the shortest days in Bethalto is December, with an average of 9h and 30min of daylight.
Average temperature
Bethalto, IL
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (36.1°F).
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure
Bethalto, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"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:
30.02"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 (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Bethalto, IL
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.3mph - Average wind speed in May:
7.6mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6.3mph - Average wind speed in October:
8.1mph - Average wind speed in November:
8.9mph - Average wind speed in December:
9mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity
Bethalto, IL
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Bethalto, IL
- Average rainfall in January:
1.26" - Average rainfall in February:
1.14" - Average rainfall in March:
1.57" - Average rainfall in April:
2.4" - Average rainfall in May:
3.07" - Average rainfall in June:
2.76"
- Average rainfall in July:
2.48" - Average rainfall in August:
2.91" - Average rainfall in September:
1.69" - Average rainfall in October:
1.93" - Average rainfall in November:
1.3" - Average rainfall in December:
1.38"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days
Bethalto, IL
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
6.9 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
15.1 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
6.7 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (5.6 days).
Average snowfall
Bethalto, IL
The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Bethalto, IL
- Average snowfall days in January:
6 days - Average snowfall days in February:
5.4 days - Average snowfall days in March:
2 days - Average snowfall days in April:
0.3 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 days - Average snowfall days in December:
3.8 days
The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Bethalto, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- 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:
10h and 1min - Average daylight in December:
9h and 3min
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 30min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days
Bethalto, IL
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
16.1 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
12.5 days - Average sunshine days in June:
12.5 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
14 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
19.7 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
20.4 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is July (12.3 days).
Average UV index
Bethalto, IL
The months with the highest UV index are May, 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
Bethalto, IL
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility
Bethalto, 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).
Bethalto, Illinois, USA
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