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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 Merrill, Iowa, with an average temperature varying between 25.2°F (-3.8°C) and 12.2°F (-11°C). January stands out as Merrill's coldest month, with temperatures ranging between an average high of 25.2°F (-3.8°C) and a low of 12.2°F (-11°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Merrill, Iowa, with temperature in the range of an average high of 29.5°F (-1.4°C) and an average low of 15.6°F (-9.1°C). With the advent of February, Merrill's high-temperatures adjust to a still freezing cold 29.5°F (-1.4°C), closely aligning with the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Merrill, Iowa, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 29.8°F (-1.2°C). Merrill's transition into March is marked by a distinct rise in the average high-temperature, advancing from a freezing cold 29.5°F (-1.4°C) in February to a frosty 45.1°F (7.3°C). Weather in March »
Weather in April
April is a refreshing spring month in Merrill, Iowa, with an average temperature ranging between max 57.4°F (14.1°C) and min 40.6°F (4.8°C). April's onset witnesses a shift in the average high-temperature, moving from a chilly 45.1°F (7.3°C) in March to a moderate 57.4°F (14.1°C). Weather in April »
Weather in May
May, the last month of the spring in Merrill, is an agreeable month, with an average temperature fluctuating between 69.3°F (20.7°C) and 52.3°F (11.3°C). May's onset brings a temperature rise, moving from a mild 57.4°F (14.1°C) in April to an agreeable 69.3°F (20.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Merrill, Iowa, with an average temperature varying between 62.2°F (16.8°C) and 78.4°F (25.8°C). The transition from May to June brings a temperature rise, with average high-temperatures increasing from an agreeable 69.3°F (20.7°C) to a moderately hot 78.4°F (25.8°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Merrill, Iowa, with an average temperature ranging between max 82.9°F (28.3°C) and min 64.2°F (17.9°C). The warmest month is July, with an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 64.2°F (17.9°C). For most parts of July, the heat index is calculated to be a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Merrill, is another warm month, with temperature in the range of an average low of 60.8°F (16°C) and an average high of 80.8°F (27.1°C). August brings an average high-temperature of a still warm 80.8°F (27.1°C), showing a slight difference from July's 82.9°F (28.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Merrill, is also a moderately hot month, with an average temperature varying between 54.9°F (12.7°C) and 75°F (23.9°C). Merrill's transition into September involves a gentle shift in temperature, receding from a moderately hot 80.8°F (27.1°C) in August to a still warm 75°F (23.9°C). Weather in September »
Weather in October
October, the same as September, in Merrill, Iowa, is a moderate autumn month, with an average temperature ranging between min 42.8°F (6°C) and max 58.8°F (14.9°C). October's onset brings a noticeable temperature drop, falling from a moderately hot 75°F (23.9°C) in September to a mild 58.8°F (14.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Merrill, Iowa, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 45.1°F (7.3°C). As October transitions into November, Merrill sees a drop in the average high-temperature, transitioning from a mild 58.8°F (14.9°C) to a chilly 45.1°F (7.3°C). Weather in November »
Weather in December
December, the first month of the winter in Merrill, is still a freezing cold month, with an average temperature ranging between max 29.3°F (-1.5°C) and min 17.8°F (-7.9°C). Merrill in December showcases a distinct temperature shift, moving from an average high of a chilly 45.1°F (7.3°C) in November to a subzero cold 29.3°F (-1.5°C). Weather in December »
Updated: Aug 25, 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?
With average high and low temperatures of 25.2°F (-3.8°C) and 12.2°F (-11°C) respectively, January is Merrill's coldest month.
What is the most humid month?
January is the most humid month, with an average relative humidity of 85%.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 3.3 days and typically collects 0.35" (9mm) of precipitation.
How much does it rain?
Throughout the year, there are 112 rainfall days, and 15.71" (399mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, October through December.
How many days does it snow?
In Merrill, during the entire year, snow falls for 34.7 days and aggregates up to 7.52" (191mm) of snow.
What is the month with the least sunshine?
With an average of 4.2h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 8.3 days and accumulates 1.85" (47mm) of snow.
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?
In Merrill, snow does not fall in May through September.
What is the wettest month?
The month with the most rainfall in Merrill is June, when the rain falls for 16.5 days and typically aggregates up to 2.48" (63mm) of precipitation.
When are the longest days?
The month with the longest days is June, with an average of 15h and 18min of daylight.
When is the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What are the warmest months?
The warmest time of the year in Merrill is July, with temperatures averaging a high of 82.9°F (28.3°C) and a low of 64.2°F (17.9°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.7h of sunshine.
What is the least humid month in Merrill?
The least humid month is October, with an average relative humidity of 66%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Merrill, IA
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (25.2°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure
Merrill, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.86"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"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 (29.86"Hg).
Average wind speed
Merrill, IA
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.8mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.6mph - Average wind speed in June:
8.8mph
- Average wind speed in July:
7.7mph - Average wind speed in August:
8mph - Average wind speed in September:
9.1mph - Average wind speed in October:
10.2mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity
Merrill, IA
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (66%).
Average rainfall
Merrill, IA
- Average rainfall in January:
0.35" - Average rainfall in February:
0.43" - Average rainfall in March:
1.1" - Average rainfall in April:
1.65" - Average rainfall in May:
2.24" - Average rainfall in June:
2.48"
- Average rainfall in July:
1.46" - Average rainfall in August:
1.77" - Average rainfall in September:
1.46" - Average rainfall in October:
1.46" - Average rainfall in November:
0.51" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is June (2.48").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days
Merrill, IA
- Average rainfall days in January:
3.3 days - Average rainfall days in February:
2.6 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
12.4 days - Average rainfall days in May:
15.5 days - Average rainfall days in June:
16.5 days
- Average rainfall days in July:
12.3 days - Average rainfall days in August:
12.9 days - Average rainfall days in September:
10.6 days - Average rainfall days in October:
9 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
2.6 days
The month with the highest number of rainy days is June (16.5 days).
The months with the least rainy days are February and December (2.6 days).
Average snowfall
Merrill, IA
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Merrill, IA
- Average snowfall days in January:
9.3 days - Average snowfall days in February:
8.3 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
1.6 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:
0.8 days - Average snowfall days in November:
2.3 days - Average snowfall days in December:
7.4 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Merrill, IA
- Average daylight in January:
9h and 3min - 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 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 0min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Merrill, IA
- Average sunshine days in January:
20.9 days - Average sunshine days in February:
18.6 days - Average sunshine days in March:
17.8 days - Average sunshine days in April:
15.2 days - Average sunshine days in May:
13.4 days - Average sunshine days in June:
11.9 days
- Average sunshine days in July:
15.8 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
22.5 days - Average sunshine days in December:
21.8 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (11.9 days).
Average UV index
Merrill, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Merrill, IA
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility
Merrill, 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).
Merrill, Iowa, USA
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