Climate and monthly weather forecastRound Rock, AZ
Climate and monthly weather forecast
Weather in January
January, like December, in Round Rock, Arizona, is an icy winter month, with an average temperature varying between 38.8°F (3.8°C) and 24.6°F (-4.1°C). Round Rock's coldest weather arrives in January, when temperatures average a high of 38.8°F (3.8°C) and a low of 24.6°F (-4.1°C). Weather in January »Weather in February
February, the last month of the winter in Round Rock, is a chilly month, with an average temperature varying between 28.8°F (-1.8°C) and 44.2°F (6.8°C). A slight uplift of average high-temperatures is noted in February, with temperatures adjusting from a cold 38.8°F (3.8°C) in January to a frosty 44.2°F (6.8°C). Weather in February »Weather in March
March, the first month of the spring in Round Rock, is a cool month, with an average temperature fluctuating between 54.9°F (12.7°C) and 36.3°F (2.4°C). March brings a rise in Round Rock's average high-temperature, moving from a frosty 44.2°F (6.8°C) in February to a fresh 54.9°F (12.7°C). Weather in March »Weather in April
April in Round Rock, Arizona, is a comfortable spring month, with an average temperature fluctuating between 42.3°F (5.7°C) and 62.2°F (16.8°C). April brings a slight rise in Round Rock's average high-temperature, moving from a cool 54.9°F (12.7°C) in March to an enjoyable 62.2°F (16.8°C). Weather in April »Weather in May
May, the last month of the spring in Round Rock, is a pleasant month, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 50.5°F (10.3°C). Observing a rise in May, the average high-temperature goes from April's enjoyable 62.2°F (16.8°C) to an agreeable 71.2°F (21.8°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Round Rock, Arizona, with an average temperature varying between 62.2°F (16.8°C) and 84.7°F (29.3°C). As May transitions into June, a change in temperatures is observed, with average highs moving from an agreeable 71.2°F (21.8°C) to a moderately hot 84.7°F (29.3°C). Weather in June »Weather in July
July is a hot summer month in Round Rock, Arizona, with an average temperature varying between 86.9°F (30.5°C) and 69.1°F (20.6°C). Round Rock's temperatures peak on average in July, reaching 86.9°F (30.5°C) at their highest and 69.1°F (20.6°C) at their lowest. Weather in July »Weather in August
August, the last month of the summer in Round Rock, is also a moderately hot month, with an average temperature fluctuating between 68°F (20°C) and 84.6°F (29.2°C). The unfolding of August shows an average high-temperature of a warm 84.6°F (29.2°C), indicating a slight variance from July's 86.9°F (30.5°C). Weather in August »Weather in September
September, the first month of the autumn in Round Rock, is also a moderately hot month, with temperature in the range of an average low of 60.1°F (15.6°C) and an average high of 77.7°F (25.4°C). The start of September signals a gentle decrease in the average high-temperature, transitioning from a warm 84.6°F (29.2°C) in August to a still moderately hot 77.7°F (25.4°C). Weather in September »Weather in October
October, like September, in Round Rock, Arizona, is another refreshing autumn month, with an average temperature varying between 46°F (7.8°C) and 63.9°F (17.7°C). Round Rock's October weather shows a moderate shift in high-temperatures, falling from September's moderately hot 77.7°F (25.4°C) to a refreshing 63.9°F (17.7°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Round Rock, Arizona, with an average temperature ranging between min 34.7°F (1.5°C) and max 52.2°F (11.2°C). November brings a decrease in the average high-temperature, shifting from an enjoyable 63.9°F (17.7°C) in October to a fresh 52.2°F (11.2°C). Weather in November »Weather in December
The first month of the winter, December, is also an icy month in Round Rock, Arizona, with an average temperature fluctuating between 25.7°F (-3.5°C) and 40.1°F (4.5°C). Setting in of December comes with a decrease in the average high-temperature, moving from a fresh 52.2°F (11.2°C) in November to a cold 40.1°F (4.5°C). Weather in December »Updated: Feb 9, 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
Round Rock's coldest weather arrives in January, when temperatures average a high of 38.8°F (3.8°C) and a low of 24.6°F (-4.1°C).
With an average relative humidity of 67%, January is the most humid month.
In Round Rock, during the entire year, the rain falls for 75.5 days and collects up to 7.91" (201mm) of precipitation.
January through May, October through December are months with snowfall.
In Round Rock, during the entire year, snow falls for 20.3 days and aggregates up to 12.52" (318mm) of snow.
With an average of 6.7h of sunshine, January has the least sunshine of the year.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Round Rock.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
June is the least humid month in Round Rock, with an average relative humidity of 19%.
The month with the least rainfall in Round Rock is June, when the rain falls for 3.3 days and typically collects 0.2" (5mm) of precipitation.
June through September are months without snowfall.
With an average of 14h and 36min of daylight, June has the longest days of the year in Round Rock.
In Round Rock, the peak temperatures are generally noted in July, averaging a high of 86.9°F (30.5°C) and a low of 69.1°F (20.6°C).
July is the month with the most rainfall. Rain falls for 13.7 days and accumulates 1.3" (33mm) of precipitation.
With an average maximum UV index of 7, July is the month with the highest UV index in Round Rock, Arizona.
With an average of 11.9h of sunshine, August has the most sunshine of the year in Round Rock.
The month with the most snowfall in Round Rock is December, when snow falls for 5.8 days and typically aggregates up to 4.8" (122mm) of snow.
With an average of 9h and 42min of daylight, December has the shortest days of the year.
Average temperature
Round Rock, AZ
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (38.8°F).
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure
Round Rock, AZ
- Average pressure in January:
30.2"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
29.98"Hg - Average pressure in April:
29.88"Hg - Average pressure in May:
29.86"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.94"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed
Round Rock, AZ
- Average wind speed in January:
5.5mph - Average wind speed in February:
7.6mph - Average wind speed in March:
9.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
10.2mph - Average wind speed in June:
9.8mph
- Average wind speed in July:
7.2mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.1mph - Average wind speed in October:
7.1mph - Average wind speed in November:
7mph - Average wind speed in December:
6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).
Average humidity
Round Rock, AZ
The month with the highest relative humidity is January (67%).
The month with the lowest relative humidity is June (19%).
Average rainfall
Round Rock, AZ
- Average rainfall in January:
0.59" - Average rainfall in February:
0.51" - Average rainfall in March:
0.79" - Average rainfall in April:
0.28" - Average rainfall in May:
0.47" - Average rainfall in June:
0.2"
- Average rainfall in July:
1.3" - Average rainfall in August:
1.22" - Average rainfall in September:
0.71" - Average rainfall in October:
0.67" - Average rainfall in November:
0.43" - Average rainfall in December:
0.75"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is June (0.2").
Average rainfall days
Round Rock, AZ
- Average rainfall days in January:
4.1 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
5.8 days - Average rainfall days in April:
6 days - Average rainfall days in May:
5.4 days - Average rainfall days in June:
3.3 days
- Average rainfall days in July:
13.7 days - Average rainfall days in August:
11.2 days - Average rainfall days in September:
8.2 days - Average rainfall days in October:
5.6 days - Average rainfall days in November:
3.8 days - Average rainfall days in December:
5.1 days
The month with the highest number of rainy days is July (13.7 days).
The months with the least rainy days are February and June (3.3 days).
Average snowfall
Round Rock, AZ
- Average snowfall in January:
3.35" - Average snowfall in February:
2.09" - Average snowfall in March:
0.71" - Average snowfall in April:
0.12" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is December (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Round Rock, AZ
- Average snowfall days in January:
5.8 days - Average snowfall days in February:
4.4 days - Average snowfall days in March:
1.7 days - Average snowfall days in April:
0.4 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:
0.4 days - Average snowfall days in November:
1.7 days - Average snowfall days in December:
5.8 days
The months with the highest number of snowfall days are January and December (5.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Round Rock, AZ
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 6min - Average daylight in June:
14h and 36min
- Average daylight in July:
14h and 24min - Average daylight in August:
13h and 30min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 12min - Average daylight in December:
9h and 42min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
6h and 42min - Average sunshine in February:
7h and 54min - Average sunshine in March:
9h and 6min - Average sunshine in April:
10h and 54min - Average sunshine in May:
11h and 24min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
11h and 48min - Average sunshine in August:
11h and 54min - Average sunshine in September:
10h and 30min - Average sunshine in October:
7h and 42min - Average sunshine in November:
7h and 24min - Average sunshine in December:
6h and 48min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 42min).
Average sunshine days
Round Rock, AZ
- Average sunshine days in January:
22.5 days - Average sunshine days in February:
20.9 days - Average sunshine days in March:
23.3 days - Average sunshine days in April:
22.3 days - Average sunshine days in May:
23.2 days - Average sunshine days in June:
25.4 days
- Average sunshine days in July:
13.2 days - Average sunshine days in August:
15.8 days - Average sunshine days in September:
18.4 days - Average sunshine days in October:
23.3 days - Average sunshine days in November:
24.8 days - Average sunshine days in December:
21.7 days
The month with the most sunshine days is June (25.4 days).
The month with the least sunshine days is July (13.2 days).
Average UV index
Round Rock, AZ
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Round Rock, AZ
The months with the most cloud cover are January and December (Cloud cover 24).
The month with the least cloud cover is June (Cloud cover 9).
Average visibility
Round Rock, AZ
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).
