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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
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Pomona, Illinois, with an average temperature varying between 26.2°F (-3.2°C) and 39.6°F (4.2°C). In Pomona, January is the month with the lowest recorded average temperatures, measuring a high of 39.6°F (4.2°C) and a low of 26.2°F (-3.2°C). Weather in January »
Weather in February
The last month of the winter, February, is a chilly month in Pomona, Illinois, with an average temperature ranging between min 30°F (-1.1°C) and max 43.7°F (6.5°C). Pomona transitions into February recording an average high-temperature of a chilly 43.7°F (6.5°C), closely aligning with the preceding month's temperature. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Pomona, Illinois, with an average temperature ranging between min 38.8°F (3.8°C) and max 55.2°F (12.9°C). The arrival of March brings a temperature shift, with the average high-temperature escalating from a chilly 43.7°F (6.5°C) in February to a fresh 55.2°F (12.9°C). Weather in March »
Weather in April
April in Pomona, Illinois, is an enjoyable spring month, with temperature in the range of an average high of 66.2°F (19°C) and an average low of 48.6°F (9.2°C). An upsurge in temperatures occurs as March gives way to April, with average highs shifting from a cool 55.2°F (12.9°C) to a refreshing 66.2°F (19°C). Weather in April »
Weather in May
May, the last month of the spring in Pomona, is a moderately hot month, with an average temperature fluctuating between 58.3°F (14.6°C) and 75.7°F (24.3°C). With the arrival of May, the average high-temperature transitions from a refreshing 66.2°F (19°C) in April to a moderately hot 75.7°F (24.3°C). Weather in May »
Weather in June
June, the first month of the summer in Pomona, is still a warm month, with an average temperature ranging between max 84.7°F (29.3°C) and min 66.4°F (19.1°C). June indicates a change in the average high-temperature, moving up from a warm 75.7°F (24.3°C) in May to a still moderately hot 84.7°F (29.3°C). Weather in June »
Weather in July
July is a tropical summer month in Pomona, Illinois, with an average temperature ranging between min 68.7°F (20.4°C) and max 87.4°F (30.8°C). In Pomona, July records the highest average temperatures, peaking at 87.4°F (30.8°C) and reaching a low of 68.7°F (20.4°C). For most parts of July, the heat index is evaluated at a torrid 102.2°F (39°C). Weather in July »
Weather in August
August, the last month of the summer in Pomona, is another warm month, with an average temperature fluctuating between 66.4°F (19.1°C) and 85.8°F (29.9°C). The beginning of August records an average high-temperature of a moderately hot 85.8°F (29.9°C), almost echoing the conditions of the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Pomona, Illinois, with an average temperature fluctuating between 60.3°F (15.7°C) and 80.4°F (26.9°C). September's arrival subtly correlates with a reduction in the average high-temperature, down from 85.8°F (29.9°C) in August to a still warm 80.4°F (26.9°C). Weather in September »
Weather in October
October, like September, in Pomona, Illinois, is another refreshing autumn month, with an average temperature varying between 49.3°F (9.6°C) and 67.5°F (19.7°C). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from a warm 80.4°F (26.9°C) in September to an enjoyable 67.5°F (19.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Pomona, is also a fresh month, with an average temperature fluctuating between 54°F (12.2°C) and 38.7°F (3.7°C). Pomona observes a minor decrease in the average high-temperature with the arrival of November, falling from October's enjoyable 67.5°F (19.7°C) to a cool 54°F (12.2°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Pomona, Illinois, with an average temperature varying between 31.8°F (-0.1°C) and 43.7°F (6.5°C). December's onset brings a slight change in high-temperatures, falling from a cool 54°F (12.2°C) in November to a chilly 43.7°F (6.5°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 time of year in Pomona?
Pomona reaches its average lowest temperatures in January, measuring 39.6°F (4.2°C) at the peak and 26.2°F (-3.2°C) at the lowest.
How much does it rain in Pomona?
Throughout the year, there are 158.6 rainfall days, and 34.69" (881mm) of precipitation is accumulated.
When does it snow in Pomona?
Months with snowfall are January through April, October through December.
How many days does it snow in Pomona?
In Pomona, during the entire year, snow falls for 15.9 days and aggregates up to 5.71" (145mm) of snow.
What is the month with the least sunshine in Pomona?
The month with the least sunshine is January, with an average of 4.7h of sunshine.
What is the month with the lowest UV index in Pomona?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Pomona.
What is the snowiest month in Pomona?
February is the month with the most snowfall. Snow falls for 4.8 days and accumulates 1.73" (44mm) of snow.
When is Daylight Saving Time (DST) in Pomona?
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.
What is the rainiest month in Pomona?
April is the month with the most rainfall. Rain falls for 15.5 days and accumulates 4.49" (114mm) of precipitation.
What is the most humid month in Pomona?
The most humid month in Pomona, Illinois, is May, with an average relative humidity of 79%.
When it does not snow in Pomona?
In Pomona, Illinois, snow does not fall in May through September.
When is the highest UV index in Pomona?
May through August, with an average maximum UV index of 6, are months with the highest UV index in Pomona, Illinois.
When are the longest days in Pomona?
The month with the longest days in Pomona, Illinois, is June, with an average of 14h and 42min of daylight.
What month has the most sunshine in Pomona?
With an average of 10.6h of sunshine, June has the most sunshine of the year in Pomona.
What month is the hottest in Pomona?
July, on average, is the warmest month, registering a high temperature of 87.4°F (30.8°C) and a low of 68.7°F (20.4°C).
What is the driest month in Pomona?
The month with the least rainfall in Pomona, Illinois, is September, when the rain falls for 12.7 days and typically collects 1.85" (47mm) of precipitation.
What is the least humid month in Pomona?
The least humid month is October, with an average relative humidity of 71%.
What is the month with the shortest days in Pomona?
The month with the shortest days in Pomona, Illinois, is December, with an average of 9h and 36min of daylight.
Average temperature
Pomona, IL
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure
Pomona, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Pomona, IL
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.3mph - Average wind speed in March:
9.1mph - Average wind speed in April:
8.9mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.8mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity
Pomona, IL
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Pomona, IL
- Average rainfall in January:
2.17" - Average rainfall in February:
2.36" - Average rainfall in March:
3.11" - Average rainfall in April:
4.49" - Average rainfall in May:
3.82" - Average rainfall in June:
3.43"
The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days
Pomona, IL
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
15.2 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
13.9 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
Pomona, IL
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Pomona, IL
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.4 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 days
The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Pomona, 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 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 3min - 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 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 3min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Pomona, IL
- Average sunshine days in January:
17.7 days - Average sunshine days in February:
13.6 days - Average sunshine days in March:
13.4 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
11.7 days - Average sunshine days in August:
14.2 days - Average sunshine days in September:
16 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index
Pomona, 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
Pomona, IL
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility
Pomona, 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).