Climate and monthly weather forecastSunnyvale, TX
Climate and monthly weather forecast
Weather in January
January, like December, in Sunnyvale, Texas, is another fresh winter month, with temperature in the range of an average low of 38.8°F (3.8°C) and an average high of 54.3°F (12.4°C). January is Sunnyvale's coldest month, registering average high temperatures of 54.3°F (12.4°C) and lows of 38.8°F (3.8°C). Weather in January »Weather in February
February, the last month of the winter in Sunnyvale, is a mild month, with an average temperature fluctuating between 57.7°F (14.3°C) and 42.3°F (5.7°C). February brings an average high-temperature of a refreshing 57.7°F (14.3°C), showing a slight difference from January's 54.3°F (12.4°C). Weather in February »Weather in March
March, the first month of the spring in Sunnyvale, is a comfortable month, with temperature in the range of an average low of 50°F (10°C) and an average high of 66.7°F (19.3°C). March brings a rise in Sunnyvale's average high-temperature, moving from a mild 57.7°F (14.3°C) in February to a comfortable 66.7°F (19.3°C). Weather in March »Weather in April
April in Sunnyvale, Texas, is a warm spring month, with an average temperature fluctuating between 74.5°F (23.6°C) and 55.9°F (13.3°C). The coming of April brings a minor shift in Sunnyvale's weather, with average high-temperatures adjusting from March's enjoyable 66.7°F (19.3°C) to a moderately hot 74.5°F (23.6°C). Weather in April »Weather in May
The last month of the spring, May, is also a moderately hot month in Sunnyvale, Texas, with an average temperature varying between 81.1°F (27.3°C) and 64°F (17.8°C). May's arrival coincides with a subtle temperature rise, moving from April's 74.5°F (23.6°C) to a still moderately hot 81.1°F (27.3°C). Weather in May »Weather in June
The first month of the summer, June, is a tropical month in Sunnyvale, Texas, with an average temperature fluctuating between 90.7°F (32.6°C) and 73°F (22.8°C). In June, the meteorological conditions change with the average high-temperature moving from a moderately hot 81.1°F (27.3°C) in May to a tropical 90.7°F (32.6°C). Weather in June »Weather in July
July, the same as June, in Sunnyvale, Texas, is a hot summer month, with an average temperature varying between 75.7°F (24.3°C) and 94.6°F (34.8°C). As June transitions into July, the average high-temperature rests at a still tropical 94.6°F (34.8°C), maintaining a close resemblance to the previous month. Weather in July »Weather in August
The last month of the summer, August, is a torrid month in Sunnyvale, Texas, with temperature in the range of an average high of 95.5°F (35.3°C) and an average low of 75.7°F (24.3°C). Sunnyvale's August weather, marked by an average high temperature of 95.5°F (35.3°C) and an average low temperature of 75.7°F (24.3°C), is the warmest in the year. The heat index for August is appraised at a blazing hot 113°F (45°C). Weather in August »Weather in September
The first month of the autumn, September, is still a hot month in Sunnyvale, Texas, with an average temperature fluctuating between 69.6°F (20.9°C) and 87.6°F (30.9°C). September's onset introduces a mild reduction in the average high-temperature, from a very hot 95.5°F (35.3°C) in August to a tropical 87.6°F (30.9°C). Weather in September »Weather in October
October, the same as September, is another warm autumn month in Sunnyvale, Texas, with an average temperature fluctuating between 76.1°F (24.5°C) and 58.3°F (14.6°C). October's onset corresponds with a shift in the average high-temperature, moving from a hot 87.6°F (30.9°C) in September to a moderately hot 76.1°F (24.5°C). Weather in October »Weather in November
November, the last month of the autumn in Sunnyvale, is also an enjoyable month, with temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 64°F (17.8°C). November's onset corresponds with a shift in the average high-temperature, moving from a moderately hot 76.1°F (24.5°C) in October to a refreshing 64°F (17.8°C). Weather in November »Weather in December
December, the first month of the winter in Sunnyvale, is still a mild month, with an average temperature fluctuating between 55.8°F (13.2°C) and 41.7°F (5.4°C). December's arrival signals a moderate reduction in the average high-temperature, easing from an enjoyable 64°F (17.8°C) in November to a mild 55.8°F (13.2°C). Weather in December »Updated: Aug 16, 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
Temperature records mark January as the coldest month, with highs averaging 54.3°F (12.4°C) and lows at 38.8°F (3.8°C).
Throughout the year, there are 149.6 rainfall days, and 33.35" (847mm) of precipitation is accumulated.
January and February are months with snowfall.
Throughout the year, there are 2 snowfall days, and 0.87" (22mm) of snow is accumulated.
January and December, with an average maximum UV index of 3, are months with the lowest UV index.
February is the month with the least rainfall. Rain falls for 10.9 days and accumulates 1.85" (47mm) of precipitation.
February is the month with the most snowfall. Snow falls for 1.2 days and accumulates 0.67" (17mm) of snow.
March through December are months without snowfall.
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.
The most humid month is May, with an average relative humidity of 75%.
June has the longest days of the year, with an average of 14h and 18min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 7.
Sunnyvale registers the average highest temperatures during August, with peaks of 95.5°F (35.3°C) and lows of 75.7°F (24.3°C).
The least humid month is August, with an average relative humidity of 58%.
With an average of 11.1h of sunshine, August has the most sunshine of the year.
The month with the most rainfall is October, when the rain falls for 12.4 days and typically aggregates up to 4.29" (109mm) of precipitation.
With an average of 10h and 0min of daylight, December has the shortest days of the year.
December has the least sunshine of the year, with an average of 5.5h of sunshine.
Average temperature
Sunnyvale, TX
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (54.3°F).
The months with the highest average low temperature are July and August (75.7°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).
Average pressure
Sunnyvale, TX
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"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 (29.91"Hg).
Average wind speed
Sunnyvale, TX
- Average wind speed in January:
8.9mph - Average wind speed in February:
9.5mph - Average wind speed in March:
9.8mph - Average wind speed in April:
9.7mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7.2mph - Average wind speed in August:
6.8mph - Average wind speed in September:
6.6mph - Average wind speed in October:
7.9mph - Average wind speed in November:
8.4mph - Average wind speed in December:
8.4mph
The windiest month (with the highest average wind speed) is March (9.8mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity
Sunnyvale, TX
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (58%).
Average rainfall
Sunnyvale, TX
- Average rainfall in January:
1.93" - Average rainfall in February:
1.85" - Average rainfall in March:
3.11" - Average rainfall in April:
2.91" - Average rainfall in May:
4.17" - Average rainfall in June:
2.91"
The wettest month (with the highest rainfall) is October (4.29").
The driest month (with the least rainfall) is February (1.85").
Average rainfall days
Sunnyvale, TX
- Average rainfall days in January:
7.6 days - Average rainfall days in February:
10.9 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
15.4 days - Average rainfall days in June:
13.3 days
- Average rainfall days in July:
13.1 days - Average rainfall days in August:
13.2 days - Average rainfall days in September:
15.3 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
9.6 days - Average rainfall days in December:
10.2 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (7.6 days).
Average snowfall
Sunnyvale, TX
The month with the highest snowfall is February (0.67").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days
Sunnyvale, TX
- Average snowfall days in January:
0.4 days - Average snowfall days in February:
1.2 days - Average snowfall days in March:
0.2 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 days - Average snowfall days in December:
0.2 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
Sunnyvale, TX
- Average daylight in January:
10h and 18min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 18min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 18min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 30min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
5h and 48min - Average sunshine in February:
6h and 30min - Average sunshine in March:
6h and 48min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 42min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
11h and 6min - Average sunshine in September:
8h and 36min - Average sunshine in October:
6h and 36min - Average sunshine in November:
5h and 48min - Average sunshine in December:
5h and 30min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days
Sunnyvale, TX
- Average sunshine days in January:
21.8 days - Average sunshine days in February:
15.4 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
14.1 days - Average sunshine days in June:
13.8 days
- Average sunshine days in July:
16.6 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
13 days - Average sunshine days in October:
17 days - Average sunshine days in November:
18.6 days - Average sunshine days in December:
19 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is September (13 days).
Average UV index
Sunnyvale, TX
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover
Sunnyvale, TX
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility
Sunnyvale, 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).
