Climate and monthly weather forecastRound Rock, TX
Climate and monthly weather forecast
The climate of Round Rock
Located in the heart of Texas, USA, Round Rock boasts a Humid subtropical climate. This characteristic climate is distilled into the Köppen climate classification as Cfa, signifying no specific dry season. Over the year, Round Rock experiences average high temperatures between 58.6°F (14.8°C) and 96.1°F (35.6°C). The lowest temperature dips to 42.4°F (5.8°C) while the maximum reaches 96.1°F (35.6°C). The relative humidity fluctuates throughout the year, with the lowest level at 59% in August and the highest at 75% in May.Round Rock experiences rainfall throughout the year, with monthly averages varying from 1.14" (29mm) in February to as high as 4.02" (102mm) in May. Typically, the region encounters rainy days as many as 15.7 times in May and 9.5 times in November. Instances of snowfall in Round Rock are sporadic and minimal. Only January and December have any record of snowfall, with 0.08" (2mm) and 0.24" (6mm) respectively. Apart from temperature and precipitation, wind speed in Round Rock fluctuates between 6.5mph (10.5km/h) and 9.8mph (15.8km/h), reaching gusts of up to 15.2mph (24.5km/h).
The Best Time to Visit Round Rock
With an average high of 90.7°F (32.6°C) to 96.1°F (35.6°C) and an average low of 72.1°F (22.3°C) to 75.4°F (24.1°C), Round Rock presents an enjoyable climate from June to August. A decrease in relative humidity from 75% to 59% further contributes to the pleasant weather. The daylight hours extend to a maximum of 14.1 hours in June, ensuring a well-lit day for visitors. Moreover, the UV index is at its peak, marking optimum conditions for outdoor activities.The Worst Time to Visit Round Rock
As the annual precipitation peaks in May at 4.02" (102mm) and rainfall days at 15.7, while humidity is averaging at a high of 75%, visitors might want to reconsider setting their travel dates around this time. Despite the high temperatures that could reach up to 83.3°F (28.5°C) during the day, the weather remains largely unpredictable, thus making it a less optimal time for outdoor activities or sightseeing.Spring Weather in Round Rock
From March to May, spring in Round Rock presents a moderate climate. While the average highs range from 70.3°F (21.3°C) to 83.3°F (28.5°C), the lows linger between 52.3°F (11.3°C) to 65.7°F (18.7°C). The humidity levels reach their maximum during this period, particularly in May at 75%. Though rainfall increases from 1.81" (46mm) to 4.02" (102mm) in this season, the average number of days of sunshine is consistent, promising enjoyable weather for activities.Summer Weather in Round Rock
Round Rock's summer, from June to August, is characterized by high temperatures, peaking at 96.1°F (35.6°C). The summer nights are warm as well with temperatures staying above 70°F (21.1°C). The relative humidity dips to its lowest point of 59% during this season. While the summer receives an intermediate rainfall of about 1.57" (40mm) to 2.09" (53mm), the extended daylight hours of around 14 hours provide plenty of opportunity for exploration.Autumn Weather in Round Rock
From September to November, autumn brings a decline in temperatures, with averages falling from 88.2°F (31.2°C) to 67.1°F (19.5°C). Nights during this season cool down to about 60.6°F (15.9°C) to 70.9°F (21.6°C). Autumn witnesses a moderate rainfall of about 1.46" (37mm) to 3.62" (92mm), while the relative humidity remains consistent at around 67%.Winter weather in Round Rock
Winter in Round Rock lasts from December to February, with an average high temperature of around 59.4°F (15.2°C) to 62.4°F (16.9°C) and lows of about 42.4°F (5.8°C) to 46°F (7.8°C). This season sees minimal rainfall of around 1.5" (38mm) to 1.65" (42mm). However, despite the cold, the city experiences virtually no snowfall, with only 0.24" (6mm) in January and absolutely none thereafter. With humidity levels floating at around 66% to 70%, and an average of 6 daylight hours, the winters provide a unique spectacle of the Texas landscape.Weather in January
Beginning the year, Round Rock, Texas, greets January with relatively mild weather. The temperatures are moderately low, leaving residents with a need for coats and scarves; however, it is much less frigid compared to other states during this month. Weather in January »Weather in February
As the calendar turns from January to February, the weather in Round Rock starts to show some signs of warming up. The chill in the air begins to break slightly; however, winter coats and scarves are still a common sight. February has a higher occurrence of rain compared to January, contributing to the increase in overall humidity. Weather in February »Weather in March
March marks the transition from winter to spring in Round Rock, Texas. The weather begins to warm significantly, and residents start to shed their winter attire. It is a month where nature blooms and people can enjoy longer hours of daylight. Weather in March »Weather in April
As Round Rock progresses into April, the city truly starts to experience the warmth of spring. The days are becoming noticeably longer, the temperatures more pleasant, and the sunshine abundant. Outdoor activities become quite popular during this time, making it a great period to explore the city and its surroundings. Weather in April »Weather in May
May in Round Rock, Texas, is characterized by a full bloom of spring. This period showcases clear blue skies, plenty of sunshine, and warm breezes. Pleasant weather makes this month ideal for enjoying picnics, outdoor gatherings, and nature hikes in the city and its outskirts. Weather in May »Weather in June
June marks the official beginning of summer in Round Rock. The weather becomes characterized by hot temperatures, clear skies, and long, sunny days. Sun protection becomes essential as UV indices reach their highest. Despite being a summer month, June sees a decrease in rainfall from May, making it a relatively drier month. Weather in June »Weather in July
In July, Round Rock, Texas, is under the full sway of the summer season. Temperatures are generally at their highest, making air conditioning a necessity for most residents. Despite these high temperatures, rainfall decreases this month and there's plenty of sunshine to be enjoyed. Weather in July »Weather in August
The sweltering heat continues in Round Rock as August rolls in. The temperatures remain consistently high and the sunny days are long. The locals adjust their routines to escape the afternoon heat, preferring early morning or evening outings. Weather in August »Weather in September
As summer transitions into autumn in September, the weather in Round Rock starts to gradually cool down. This transition brings a slight dip in temperatures, providing residents with respite from the summer heat. Rampant rainfall in September shoots up this month, contrasting to the scenario in August. Weather in September »Weather in October
October in Round Rock, Texas, offers the quintessence of autumn weather. The temperatures are comfortable, the days sunny, and the leaves on trees turn to hues of gold and brown. As rainfall begins to reduce from September, it becomes an ideal period to enjoy outdoor activities. Weather in October »Weather in November
With the arrival of November, Round Rock starts to experience the chill of the fast-approaching winter season. Temperatures continue to lower, making way for cooler days and colder nights. November witnesses a significant reduction in rainfall compared to October, indicating the start of the dryer season. Weather in November »Weather in December
December brings the onset of winter to Round Rock, Texas. The air is filled with the unmistakable chill of the season, and the days start to shorten as the year draws to a close. Outdoor activities start to experience a lull as residents prefer the warmth of indoor spaces. Weather in December »Updated: Feb 14, 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
With average temperatures fluctuating between a high of 58.6°F (14.8°C) and a low of 42.4°F (5.8°C), January stands out as the coldest month in Round Rock.
Throughout the year, in Round Rock, there are 139.3 rainfall days, and 26.18" (665mm) of precipitation is accumulated.
January and February are months with snowfall in Round Rock.
In Round Rock, Texas, during the entire year, snow falls for 1.7 days and aggregates up to 0.31" (8mm) of snow.
The month with the least rainfall in Round Rock, Texas, is February, when the rain falls for 10.2 days and typically collects 1.14" (29mm) of precipitation.
The month with the most snowfall in Round Rock is February, when snow falls for 0.8 days and typically aggregates up to 0.24" (6mm) of snow.
In Round Rock, snow does not fall in March through December.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Round Rock, Texas, 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.
May is the most humid month in Round Rock, with an average relative humidity of 75%.
The month with the most rainfall in Round Rock is May, when the rain falls for 15.7 days and typically aggregates up to 4.02" (102mm) of precipitation.
With an average of 14h and 6min of daylight, June has the longest days of the year in Round Rock.
The months with the highest UV index in Round Rock are June through August, with an average maximum UV index of 7.
July has the most sunshine of the year, with an average of 10.4h of sunshine.
Round Rock's temperatures tend to reach their peak averages in August, with a high of 96.1°F (35.6°C) and a low of 75.4°F (24.1°C).
The least humid month in Round Rock, Texas, is August, with an average relative humidity of 59%.
December has the shortest days of the year in Round Rock, Texas, with an average of 10h and 12min of daylight.
The month with the least sunshine in Round Rock, Texas, is December, with an average of 5.3h of sunshine.
With an average maximum UV index of 3, December is the month with the lowest UV index in Round Rock, Texas.
Average temperature
Round Rock, TX
The warmest month (with the highest average high temperature) is August (96.1°F).
The month with the lowest average high temperature is January (58.6°F).
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure
Round Rock, TX
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Round Rock, TX
- Average wind speed in January:
8.9mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.8mph - Average wind speed in April:
9.6mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8mph
- Average wind speed in July:
7.6mph - Average wind speed in August:
7.3mph - Average wind speed in September:
6.5mph - Average wind speed in October:
7.8mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is March (9.8mph).
The calmest month (with the lowest average wind speed) is September (6.5mph).
Average humidity
Round Rock, TX
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (59%).
Average rainfall
Round Rock, TX
- Average rainfall in January:
1.5" - Average rainfall in February:
1.14" - Average rainfall in March:
1.81" - Average rainfall in April:
2.32" - Average rainfall in May:
4.02" - Average rainfall in June:
2.09"
- Average rainfall in July:
1.57" - Average rainfall in August:
1.89" - Average rainfall in September:
3.11" - Average rainfall in October:
3.62" - Average rainfall in November:
1.46" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days
Round Rock, TX
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
10.2 days - Average rainfall days in March:
13.4 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
15.7 days - Average rainfall days in June:
12.4 days
- Average rainfall days in July:
10.3 days - Average rainfall days in August:
9.9 days - Average rainfall days in September:
15.1 days - Average rainfall days in October:
11.1 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
9.6 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (8.3 days).
Average snowfall
Round Rock, TX
The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days
Round Rock, TX
- Average snowfall days in January:
0.5 days - Average snowfall days in February:
0.8 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 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 days - Average snowfall days in November:
0.1 days - Average snowfall days in December:
0.3 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Round Rock, TX
- Average daylight in January:
10h and 24min - Average daylight in February:
11h and 6min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 54min - Average daylight in May:
13h and 42min - Average daylight in June:
14h and 6min
- Average daylight in July:
13h and 54min - Average daylight in August:
13h and 12min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 36min - Average daylight in December:
10h and 12min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in January:
6h and 6min - Average sunshine in February:
6h and 36min - Average sunshine in March:
6h and 36min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 6min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 18min - Average sunshine in October:
6h and 48min - Average sunshine in November:
5h and 30min - Average sunshine in December:
5h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days
Round Rock, TX
- Average sunshine days in January:
21.1 days - Average sunshine days in February:
15.1 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
13.3 days - Average sunshine days in June:
15.5 days
- Average sunshine days in July:
18.2 days - Average sunshine days in August:
19.3 days - Average sunshine days in September:
13.3 days - Average sunshine days in October:
18.1 days - Average sunshine days in November:
17.7 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is January (21.1 days).
The months with the least sunshine days are April, May and September (13.3 days).
Average UV index
Round Rock, TX
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Round Rock, TX
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility
Round Rock, TX
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).
