Monthly Weather in Houston, United States
What is the average monthly temperature in Houston?
The average monthly temperature in Houston, Texas, United States ranges from 15°C (58.9°F) in December to 31.4°C (88.6°F) in August. Houston temperature by month is given in the table below.
| Month | Celsius | Fahrenheit |
|---|---|---|
| January | 15.6°C | 60.1°F |
| February | 16.2°C | 61.2°F |
| March | 19.7°C | 67.5°F |
| April | 20.5°C | 68.9°F |
| May | 25.3°C | 77.5°F |
| June | 28.8°C | 83.8°F |
| July | 30.0°C | 86.0°F |
| August | 31.4°C | 88.5°F |
| September | 29.1°C | 84.4°F |
| October | 22.6°C | 72.7°F |
| November | 16.6°C | 61.9°F |
| December | 15.0°C | 59.0°F |
What is the hottest month in Houston?
The hottest months in Houston are August, July and September. During August the average temperature outside is 31.4°C (88.5°F), in July it is 30°C (86°F) and during September the air temperature is around 29.1°C (84.4°F).
What is the coldest month in Houston?
The coldest months in Houston are December, January and February. In December the average air temperature drops to 15°C (59°F), in January air temperature is 15.6°C (60.1°F) and during February it is 16.2°C (61.2°F).
How much does it rain on average in Houston?
On average it rains for 12 month(s) in Houston, United States with an average of 10.4 days of rain per month. In total Houston has 125 rainy days in a year.
When does it rain the most in Houston?
In Houston it rains the most during the following months.
- May - on average 2.25mm (0.09 inches) of rainfall per day.
- October - on average 2.1mm (0.08 inches) of rainfall per day.
- April - on average 1.8mm (0.07 inches) of rainfall per day.
- November - on average 1.46mm (0.06 inches) of rainfall per day.
- January - on average 1.45mm (0.06 inches) of rainfall per day.
- September - on average 1.25mm (0.05 inches) of rainfall per day.
Does it snow in Houston?
No, it doesn't snow in Houston.
When is it windy in Houston?
The windiest months in Houston, United States are March, April and February. In March the average windspeed is 31.4 km/h (19.5 mph), during April the windspeed is 30.9 km/h (19.2 mph) and in February the windspeed is 30.2 km/h (18.8 mph).
What are the least windy months in Houston?
The least windy months in Houston are November, May and September. In November the average windspeed is 23.4 km/h (14.5 mph), during May the windspeed is 24.8 km/h (15.4 mph) and in September the windspeed is 25.5 km/h (15.8 mph).
When is it cloudy in Houston?
The cloudiest months in Houston, United States are February, April and March. On average in February 71.5% of sky is covered by clouds, in April 71.4% is covered by clouds and in March clouds cover about 69.8% of sky.
When does Houston have the clearest sky?
Houston has the clearest sky in August, September and July. In August 29.6% of sky is covered by clouds, in September clouds cover around 35.8% and during July clouds cover about 38% of sky.
What is the average daylight duration in Houston?
The average daylight duration in Houston is 12 hours 9 minutes 44 seconds.
Which months have the most daylight in Houston?
The longest days in Houston are during June, July and May.
- June - 14 hours 1 minutes 28 seconds of daylight.
- July - 13 hours 50 minutes 22 seconds of daylight.
- May - 13 hours 39 minutes 2 seconds of daylight.
Which months have the least daylight in Houston?
The shortest days in Houston are during December, January and November.
- December - 10 hours 16 minutes 6 seconds of daylight.
- January - 10 hours 28 minutes 54 seconds of daylight.
- November - 10 hours 39 minutes 59 seconds of daylight.
What are the humidity levels in Houston throughout the year?
Humidity levels in Houston, United States range from 61% in August to 74.9% in February.
What are the pressure levels in Houston throughout the year?
Pressure levels in Houston change from 1010.8 mb (millibars) in June to 1020.1 mb in December.
What is the visibility in Houston throughout the year?
Visibility in Houston changes from lowest 11.6 km (7.2 miles) in March to highest 15.7 km (9.8 miles) in September.
What are the UV levels in Houston throughout the year?
UV levels change in Houston from 3.6 in November to 9.1 in August.
Which months have the highest UV levels in Houston throughout the year?
In Houston, United States the highest UV index is during August, June and July. During August the average UV index is 9.1, in June UV level is 8.7 and in July UV index is around 8.6.
Which months have the lowest UV levels in Houston throughout the year?
The lowest UV levels in Houston are in November, April and December. In November the average UV index is around 3.6, in April UV index is 3.8 and during December UV level is 4.2.