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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 another subzero cold winter month in Dewar, Iowa, with temperature in the range of an average low of 12°F (-11.1°C) and an average high of 24.3°F (-4.3°C). Dewar witnesses the coldest weather in January, with temperatures averaging a high of 24.3°F (-4.3°C) and a low of 12°F (-11.1°C). Weather in January »
Weather in February
February, the last month of the winter in Dewar, is also a subzero cold month, with an average temperature ranging between max 28.4°F (-2°C) and min 15.4°F (-9.2°C). The beginning of February records an average high-temperature of a still freezing cold 28.4°F (-2°C), almost echoing the conditions of the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Dewar, Iowa, with an average temperature ranging between max 44.1°F (6.7°C) and min 29.7°F (-1.3°C). Dewar's transition into March is marked by a distinct rise in the average high-temperature, advancing from a subzero cold 28.4°F (-2°C) in February to a frosty 44.1°F (6.7°C). Weather in March »
Weather in April
April is a refreshing spring month in Dewar, Iowa, with temperature in the range of an average high of 56.8°F (13.8°C) and an average low of 40.1°F (4.5°C). April's arrival coincides with a rise in the average high-temperature, moving from March's chilly 44.1°F (6.7°C) to a moderate 56.8°F (13.8°C). Weather in April »
Weather in May
May, the last month of the spring in Dewar, is an agreeable month, with an average temperature varying between 68.2°F (20.1°C) and 51.6°F (10.9°C). May's arrival sees a rise in the average high-temperature, jumping from April's refreshing 56.8°F (13.8°C) to a pleasant 68.2°F (20.1°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Dewar, Iowa, with temperature in the range of an average high of 77.7°F (25.4°C) and an average low of 61.3°F (16.3°C). June comes with an increase, with the average high-temperature moving from an agreeable 68.2°F (20.1°C) in May to a warm 77.7°F (25.4°C). Weather in June »
Weather in July
July, like June, in Dewar, Iowa, is another warm summer month, with an average temperature ranging between min 63.1°F (17.3°C) and max 80.1°F (26.7°C). Temperature readings reach their annual highs in July, averaging 80.1°F (26.7°C) and a minimum average of 63.1°F (17.3°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Dewar, Iowa, with an average temperature ranging between min 61°F (16.1°C) and max 78.6°F (25.9°C). As Dewar welcomes August, the average high-temperature records at a still moderately hot 78.6°F (25.9°C), marking an insignificant deviation from the prior month. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Dewar, Iowa, with an average temperature varying between 73.2°F (22.9°C) and 54.5°F (12.5°C). Dewar's progression into September involves a gentle drop in the average high-temperature, from a moderately hot 78.6°F (25.9°C) in August to a pleasant 73.2°F (22.9°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Dewar, Iowa, with an average temperature varying between 43.5°F (6.4°C) and 58.5°F (14.7°C). The arrival of October brings a distinct temperature shift, with the average high-temperature dropping from an agreeable 73.2°F (22.9°C) in September to a mild 58.5°F (14.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Dewar, is another chilly month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 44.1°F (6.7°C). The move into November indicates a reduction in the average high-temperature, down from October's mild 58.5°F (14.7°C) to a chilly 44.1°F (6.7°C). Weather in November »
Weather in December
December, the first month of the winter in Dewar, is also a subzero cold month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 20.5°F (-6.4°C). Dewar in December demonstrates a small temperature transition, adjusting from an average high of a frosty 44.1°F (6.7°C) in November to a freezing cold 31.1°F (-0.5°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?
Dewar reaches its average lowest temperatures in January, measuring 24.3°F (-4.3°C) at the peak and 12°F (-11.1°C) at the lowest.
What is the most humid month?
January is the most humid month in Dewar, with an average relative humidity of 87%.
What is the driest month?
The months with the least rainfall are January and February Rain falls for 4.1 days and accumulates 1.02" (26mm) of rain.
How much does it rain?
In Dewar, during the entire year, the rain falls for 133.6 days and collects up to 28.27" (718mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 11.5 days and accumulates 4.21" (107mm) of snow.
How many days does it snow?
Throughout the year, there are 41.6 snowfall days, and 15.24" (387mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.8h of sunshine.
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.
What is the rainiest month?
June is the month with the most rainfall. Rain falls for 18.1 days and accumulates 4.29" (109mm) of precipitation.
When it does not snow?
June through September are months without snowfall in Dewar.
When are the longest days?
June has the longest days of the year, with an average of 15h and 18min of daylight.
What is the month with the highest UV index?
With an average maximum UV index of 6, June is the month with the highest UV index in Dewar.
What is the hottest time of year?
July is the warmest month of the year in Dewar, registering average temperatures as high as 80.1°F (26.7°C) and as low as 63.1°F (17.3°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 9.9h of sunshine.
What is the least humid month?
October is the least humid month, with an average relative humidity of 72%.
What is the month with the shortest days in Dewar?
With an average of 9h and 6min of daylight, December has the shortest days of the year.
When is the lowest UV index?
With an average maximum UV index of 1, December is the month with the lowest UV index.
Average temperature
Dewar, IA
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (24.3°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure
Dewar, IA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.89"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"Hg - Average pressure in November:
30.08"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 (29.89"Hg).
Average wind speed
Dewar, IA
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7mph - Average wind speed in September:
8.2mph - Average wind speed in October:
9.8mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity
Dewar, IA
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Dewar, IA
- Average rainfall in January:
1.02" - Average rainfall in February:
1.02" - Average rainfall in March:
1.73" - Average rainfall in April:
3.19" - Average rainfall in May:
4.21" - Average rainfall in June:
4.29"
- Average rainfall in July:
2.95" - Average rainfall in August:
1.97" - Average rainfall in September:
2.48" - Average rainfall in October:
2.52" - Average rainfall in November:
1.54" - Average rainfall in December:
1.34"
The wettest month (with the highest rainfall) is June (4.29").
The driest months (with the least rainfall) are January and February (1.02").
Average rainfall days
Dewar, IA
- Average rainfall days in January:
4.1 days - Average rainfall days in February:
4 days - Average rainfall days in March:
10.1 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
18.1 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
11.2 days - Average rainfall days in October:
11.1 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
5.8 days
The month with the highest number of rainy days is June (18.1 days).
The month with the least rainy days is February (4 days).
Average snowfall
Dewar, IA
- Average snowfall in January:
4.21" - Average snowfall in February:
4.17" - Average snowfall in March:
1.61" - Average snowfall in April:
0.75" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Dewar, IA
- Average snowfall days in January:
11.5 days - Average snowfall days in February:
9.9 days - Average snowfall days in March:
5.2 days - Average snowfall days in April:
1.8 days - Average snowfall days in May:
0.3 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:
3.3 days - Average snowfall days in December:
8.9 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Dewar, 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:
14h and 5min - 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:
3h and 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Dewar, IA
- Average sunshine days in January:
16.1 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
15.1 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
15.8 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
17.8 days - Average sunshine days in November:
17.6 days - Average sunshine days in December:
17.7 days
The month with the most sunshine days is October (17.8 days).
The month with the least sunshine days is June (10 days).
Average UV index
Dewar, IA
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Dewar, IA
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility
Dewar, IA
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Dewar, Iowa, USA
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