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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 Mercer, Iowa, with temperature in the range of an average high of 29.3°F (-1.5°C) and an average low of 16°F (-8.9°C). January, known for its average high temperature of 29.3°F (-1.5°C) and an average low temperature of 16°F (-8.9°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Mercer, is a cold month, with an average temperature fluctuating between 33.4°F (0.8°C) and 18.9°F (-7.3°C). February reports an average high-temperature of an icy 33.4°F (0.8°C), slightly varied from January's 29.3°F (-1.5°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Mercer, Iowa, with an average temperature fluctuating between 32.7°F (0.4°C) and 48.6°F (9.2°C). A shift in Mercer's weather is noticeable as February turns into March, with the average high temperature increases from a wintry 33.4°F (0.8°C) to a frosty 48.6°F (9.2°C). Weather in March »
Weather in April
April in Mercer, Iowa, is a moderate spring month, with an average temperature fluctuating between 60.1°F (15.6°C) and 42.4°F (5.8°C). April's onset brings a rise in the average high-temperature, moving from a frosty 48.6°F (9.2°C) in March to a moderate 60.1°F (15.6°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Mercer, Iowa, with temperature in the range of an average high of 70.2°F (21.2°C) and an average low of 53.1°F (11.7°C). May comes with an increase, with the average high-temperature moving from a mild 60.1°F (15.6°C) in April to a pleasant 70.2°F (21.2°C). Weather in May »
Weather in June
June, the first month of the summer in Mercer, is a warm month, with an average temperature varying between 79.9°F (26.6°C) and 63.3°F (17.4°C). June's arrival coincides with a rise in the average high-temperature, moving from May's pleasant 70.2°F (21.2°C) to a warm 79.9°F (26.6°C). Weather in June »
Weather in July
July, like June, in Mercer, Iowa, is a moderately hot summer month, with an average temperature varying between 83.3°F (28.5°C) and 65.8°F (18.8°C). July stands out as Mercer's warmest month, with an average high-temperature of 83.3°F (28.5°C) and a low-temperature of 65.8°F (18.8°C). The heat index value for July is appraised at a tropical 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Mercer, Iowa, with an average temperature varying between 81.1°F (27.3°C) and 63°F (17.2°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
September, the first month of the autumn in Mercer, is also a moderately hot month, with temperature in the range of an average high of 75.6°F (24.2°C) and an average low of 56.1°F (13.4°C). The advent of September brings a slight shift in average high-temperature, moving from a moderately hot 81.1°F (27.3°C) in August to a still warm 75.6°F (24.2°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Mercer, Iowa, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 44.4°F (6.9°C). During the transition into October, Mercer observes a decrease in the average high-temperature, falling from a moderately hot 75.6°F (24.2°C) in September to a comfortable 61.3°F (16.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Mercer, is also a frosty month, with an average temperature varying between 32.9°F (0.5°C) and 47.5°F (8.6°C). November brings a decrease in the average high-temperature, falling from October's refreshing 61.3°F (16.3°C) to a chilly 47.5°F (8.6°C). Weather in November »
Weather in December
December, the first month of the winter in Mercer, is also a wintry month, with an average temperature fluctuating between 34.3°F (1.3°C) and 22.1°F (-5.5°C). The shift from November to December involves a decrease in the average high-temperature, from a chilly 47.5°F (8.6°C) to a cold 34.3°F (1.3°C). Weather in December »
Updated: Jun 21, 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 month?
In Mercer, the lowest temperatures are generally noted in January, averaging a high of 29.3°F (-1.5°C) and a low of 16°F (-8.9°C).
What are the most humid months?
The months with the highest humidity are January and June, with an average relative humidity of 81%.
How much does it rain?
In Mercer, during the entire year, the rain falls for 115.1 days and collects up to 19.21" (488mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 8.4 days and accumulates 2.28" (58mm) of snow.
How many days does it snow?
Throughout the year, there are 27.6 snowfall days, and 8.15" (207mm) of snow is accumulated.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.4h of sunshine.
When is the lowest UV index?
With an average maximum UV index of 1, January is the month with the lowest UV index.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 3 days and typically collects 0.51" (13mm) of precipitation.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
May through September are months without snowfall.
What is the rainiest month?
June is the month with the most rainfall. Rain falls for 15.3 days and accumulates 3.74" (95mm) of precipitation.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What is the month with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What part of the year is the hottest?
In Mercer, July is the warmest month, with temperatures averaging a high of 83.3°F (28.5°C) and a low of 65.8°F (18.8°C).
What month has the most sunshine?
With an average of 10.3h of sunshine, July has the most sunshine of the year.
What is the least humid month?
The least humid month is October, with an average relative humidity of 70%.
What is the month with the shortest days?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Mercer, IA
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (29.3°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure
Mercer, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"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 (29.88"Hg).
Average wind speed
Mercer, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.8mph - Average wind speed in June:
8.2mph
- Average wind speed in July:
7mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.2mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.9mph
The windiest months (with the highest average wind speed) are March and April (10.5mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity
Mercer, IA
The months with the highest relative humidity are January and June (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Mercer, IA
- Average rainfall in January:
0.55" - Average rainfall in February:
0.51" - Average rainfall in March:
1.1" - Average rainfall in April:
1.69" - Average rainfall in May:
3.19" - Average rainfall in June:
3.74"
The wettest month (with the highest rainfall) is June (3.74").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days
Mercer, IA
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
3 days - Average rainfall days in March:
9.6 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
13.2 days - Average rainfall days in August:
12.6 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
5.2 days - Average rainfall days in December:
4.7 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (3 days).
Average snowfall
Mercer, IA
The month with the highest snowfall is January (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Mercer, IA
- Average snowfall days in January:
8.4 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.9 days - Average snowfall days in May:
0.1 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:
0.7 days - Average snowfall days in November:
1.3 days - Average snowfall days in December:
5.3 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Mercer, IA
- 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 2min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Mercer, IA
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
18.7 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
15.2 days - Average sunshine days in May:
12 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
14.1 days - Average sunshine days in August:
16.3 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
20.2 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
21.9 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is May (12 days).
Average UV index
Mercer, IA
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Mercer, IA
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and September (Cloud cover 29).
Average visibility
Mercer, IA
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).
Mercer, Iowa, USA
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