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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, the same as December, in Royal, Iowa, is another subzero cold winter month, with an average temperature ranging between min 10.6°F (-11.9°C) and max 22.8°F (-5.1°C). Royal notes the coldest temperatures in January, with a high average of 22.8°F (-5.1°C) and a low of 10.6°F (-11.9°C). Weather in January »
Weather in February
February, the last month of the winter in Royal, is also a subzero cold month, with an average temperature varying between 13.5°F (-10.3°C) and 27°F (-2.8°C). The average high-temperature in February, at a still subzero cold 27°F (-2.8°C), reveals a modest deviation from January's 22.8°F (-5.1°C). Weather in February »
Weather in March
The first month of the spring, March, is a cold month in Royal, Iowa, with an average temperature fluctuating between 42.4°F (5.8°C) and 28.2°F (-2.1°C). An increase in the average high-temperature marks March, surging from February's subzero cold 27°F (-2.8°C) to a wintry 42.4°F (5.8°C). Weather in March »
Weather in April
April in Royal, Iowa, is a moderate spring month, with an average temperature ranging between max 55.6°F (13.1°C) and min 39.7°F (4.3°C). April indicates a change in the average high-temperature, moving up from a cold 42.4°F (5.8°C) in March to a refreshing 55.6°F (13.1°C). Weather in April »
Weather in May
May, the last month of the spring in Royal, is a comfortable month, with an average temperature ranging between max 67.8°F (19.9°C) and min 51.4°F (10.8°C). May witnesses an increase in the average high-temperature, moving from 55.6°F (13.1°C) in April to a still refreshing 67.8°F (19.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Royal, Iowa, with an average temperature varying between 77.4°F (25.2°C) and 61.2°F (16.2°C). An increase in the average high-temperature marks June, moving from May's refreshing 67.8°F (19.9°C) to a moderately hot 77.4°F (25.2°C). Weather in June »
Weather in July
July, like June, in Royal, Iowa, is a moderately hot summer month, with an average temperature ranging between max 80.2°F (26.8°C) and min 63.1°F (17.3°C). The warmest temperatures occur during July, when averages reach a peak of 80.2°F (26.8°C) and a low of 63.1°F (17.3°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Royal, Iowa, with an average temperature ranging between min 59.5°F (15.3°C) and max 78.3°F (25.7°C). Royal records an average high-temperature of a still warm 78.3°F (25.7°C) as August arrives, nearly mirroring the previous month's climate. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Royal, Iowa, with temperature in the range of an average high of 72.9°F (22.7°C) and an average low of 53.8°F (12.1°C). September reveals a small adjustment in temperature, transitioning from an average high of a moderately hot 78.3°F (25.7°C) in August to an agreeable 72.9°F (22.7°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Royal, Iowa, with an average temperature ranging between max 57.2°F (14°C) and min 42.1°F (5.6°C). As Royal transitions into October, the average high-temperature shows a marked reduction, decreasing from a pleasant 72.9°F (22.7°C) in September to a refreshing 57.2°F (14°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Royal, Iowa, with an average temperature ranging between min 29.7°F (-1.3°C) and max 43.2°F (6.2°C). Stepping into November, Royal observes a temperature decline, with the average high falling from October's mild 57.2°F (14°C) to a frosty 43.2°F (6.2°C). Weather in November »
Weather in December
December, the first month of the winter in Royal, is also a subzero cold month, with an average temperature fluctuating between 27.5°F (-2.5°C) and 16.9°F (-8.4°C). The onset of December brings a distinct decrease in the average high-temperature, receding from a chilly 43.2°F (6.2°C) in November to a freezing cold 27.5°F (-2.5°C). Weather in December »
Updated: Aug 1, 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?
Royal reaches its average lowest temperatures in January, measuring 22.8°F (-5.1°C) at the peak and 10.6°F (-11.9°C) at the lowest.
What is the most humid month in Royal?
With an average relative humidity of 87%, January is the most humid month.
What is the driest month?
January is the month with the least rainfall. Rain falls for 3.1 days and accumulates 0.43" (11mm) of precipitation.
How many days does it rain?
In Royal, during the entire year, the rain falls for 112.3 days and collects up to 15.31" (389mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
How much does it snow?
Throughout the year, there are 45.5 snowfall days, and 11.14" (283mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4h of sunshine.
What are the months with the lowest UV index?
January and February, with an average maximum UV index of 1, are months with the lowest UV index.
What is the snowiest month?
The month with the most snowfall is February, when snow falls for 9.5 days and typically aggregates up to 2.72" (69mm) 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.
What is the wettest month?
The month with the most rainfall is June, when the rain falls for 15.4 days and typically aggregates up to 2.44" (62mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 18min of daylight.
What are the months with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What part of the year is the hottest?
Royal registers the average highest temperatures during July, with peaks of 80.2°F (26.8°C) and lows of 63.1°F (17.3°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.4h of sunshine.
What is the least humid month?
With an average relative humidity of 68%, October is the least humid month in Royal.
What is the month with the shortest days?
With an average of 9h and 6min of daylight, December has the shortest days of the year.
Average temperature
Royal, IA
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (22.8°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 (10.6°F).
Average pressure
Royal, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Royal, IA
- Average wind speed in January:
11.1mph - Average wind speed in February:
11mph - Average wind speed in March:
10.9mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.7mph - Average wind speed in June:
8.7mph
- Average wind speed in July:
7.6mph - Average wind speed in August:
7.8mph - Average wind speed in September:
9mph - Average wind speed in October:
10.4mph - Average wind speed in November:
10.8mph - Average wind speed in December:
10.7mph
The windiest months (with the highest average wind speed) are January and April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity
Royal, IA
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (68%).
Average rainfall
Royal, IA
- Average rainfall in January:
0.43" - Average rainfall in February:
0.55" - Average rainfall in March:
1.02" - Average rainfall in April:
1.61" - Average rainfall in May:
2.13" - Average rainfall in June:
2.44"
- Average rainfall in July:
1.57" - Average rainfall in August:
1.61" - Average rainfall in September:
1.3" - Average rainfall in October:
1.26" - Average rainfall in November:
0.55" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is June (2.44").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days
Royal, IA
- Average rainfall days in January:
3.1 days - Average rainfall days in February:
2.7 days - Average rainfall days in March:
8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
15.5 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
13.3 days - Average rainfall days in August:
12.6 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
9.1 days - Average rainfall days in November:
4.8 days - Average rainfall days in December:
4 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is February (2.7 days).
Average snowfall
Royal, IA
- Average snowfall in January:
2.2" - Average snowfall in February:
2.72" - Average snowfall in March:
1.81" - Average snowfall in April:
0.79" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Royal, IA
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
2.3 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:
1.5 days - Average snowfall days in November:
4.5 days - Average snowfall days in December:
9.9 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Royal, IA
- Average daylight in January:
9h and 2min - 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 4min - 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 0min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - 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 0min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Royal, IA
- Average sunshine days in January:
19.1 days - Average sunshine days in February:
17.8 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
13.7 days - Average sunshine days in May:
12.6 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
14.1 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (10.8 days).
Average UV index
Royal, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover
Royal, IA
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility
Royal, 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).
Royal, Iowa, USA
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