Located in the state of Texas, Pasadena experiences a humid subtropical climate, noted as Cfa on the Köppen climate classification.
The hottest month of the year in Pasadena is August, with an average high of 92°F and a low of 76°F.
In contrast, the coldest month is January, with average low temperatures around 47°F and high temperatures reaching 63°F.
Pasadena benefits from its proximity to the Gulf of Mexico, which helps to moderate temperatures throughout the year.
The city does not experience extreme temperature fluctuations, making it comfortable for most of the year.
The cool season lasts from late November to late February, with average daily highs below 69°F.
Rainfall is another notable feature of Pasadena’s weather. The city receives about 53 inches of rain annually, significantly more than the national average of 38 inches.
This abundant rainfall contributes to the lush greenery and vibrant plant life in the area.
For those interested in historical weather data, Pasadena’s long-term weather patterns over a 30-year period are available in climate graphs provided by various resources.
Average Temperature in Pasadena, Texas
Pasadena, Texas experiences a wide range of temperatures throughout the year.
In August, the hottest month, the average high temperature reaches up to 92°F, while the average low is around 76°F.
On the other hand, January is the coldest month, with average highs of 63°F and lows dipping to about 47°F.
Monthly Averages
- August: High of 92°F, Low of 76°F
- January: High of 63°F, Low of 47°F
Seasonal Temperature Range
The cool season in Pasadena lasts for about 2.9 months, from late November to late February.
During this period, the average daily high temperature remains below 69°F.
In contrast, the average temperature during the hottest parts of the year from June to September ranges between 70°F to 93°F.
Temperature Comparison Table
| Month | Average High (°F) | Average Low (°F) |
|---|---|---|
| January | 63 | 47 |
| August | 92 | 76 |
Notable Observations
- Hot Months: June to September see the highest temperatures.
- Cold Months: From November to February, temperatures tend to be cooler.
The temperature variation makes Pasadena an interesting place weather-wise, with hot summers and relatively mild winters.
Average Precipitation in Pasadena, Texas
Pasadena, Texas, experiences varied precipitation throughout the year, with significant rainfall and minimal snow.
Average Rainfall in Pasadena, Texas
Pasadena sees substantial rainfall, particularly in the wetter months. Annually, the area receives around 50 inches of rain.
September is the wettest month, with about 5.94 inches of rain falling over 21 days.
The summer months, especially August, also receive heavy rain showers. During this time, thunderstorms are quite common.
Conversely, May tends to be one of the driest months, but still, rain can be frequent due to the region’s humid subtropical climate.
The average monthly precipitation helps keep the area lush and supports diverse wildlife.
Average Snow in Pasadena, Texas
Snow is extremely rare in Pasadena, Texas, given its southern location and climatic conditions.
The city experiences a humid subtropical climate, characterized by hot summers and mild winters.
While frost may occur occasionally in the colder months, snowfall is almost nonexistent.
On the rare occasion when snow does fall, it rarely accumulates and typically melts quickly.
This limited snowfall means that winter weather rarely disrupts daily life or travel.
Average Sun in Pasadena, Texas
Pasadena, Texas enjoys a fair amount of sunshine throughout the year, with peak sunlight during the summer months. Factors like daylight hours and cloud cover significantly influence the amount of sun the area receives.
Average Daily Shortwave Solar Energy in Pasadena, Texas
In Pasadena, the average daily shortwave solar energy varies across the year.
During summer, especially in July, the area sees the highest levels of solar energy.
July averages about 6.5 kilowatt hours per square meter.
In contrast, December has the least solar energy, with an average of around 3.5 kilowatt hours per square meter.
Cloud cover in Pasadena influences sunlight exposure.
Summer months generally have clearer skies, leading to higher UV indexes and increased sunlight hours.
This causes longer daylight periods, often extending from early morning (sunrise around 6:30 AM) to late evening (sunset around 8:30 PM).
In the winter, increased cloudiness reduces sunlight exposure and UV index levels.
This results in shorter daylight hours, with sunrise around 7:00 AM and sunset closer to 5:30 PM.
Summer months typically receive a daily average of 10-11 hours of sunshine, whereas winter months average around 5-6 sun hours per day.
Access detailed climate information at Climate and Average Weather Year Round in Pasadena Texas, United States.
Average Humidity in Pasadena, Texas
Pasadena, Texas experiences relatively high humidity throughout the year. The average annual humidity is around 75%. This high humidity is typical of regions near the Gulf of Mexico.
Monthly Humidity Levels
- September is the most humid month with an average humidity of 77.0%.
- March is the least humid month with an average humidity of 73.0%.
Dew points, which measure how much moisture is in the air, are also relatively high. The typical dew point in Pasadena hovers around 62°F.
This indicates a significant amount of moisture in the atmosphere at all times.
Seasonal Humidity
During the summer months, the high humidity, combined with temperatures that frequently reach into the 90s°F, can make it feel even hotter.
In the winter months, while the temperature may drop, the humidity remains noticeable.
| Month | Average Humidity (%) |
|---|---|
| January | 76% |
| February | 75% |
| March | 73% |
| April | 74% |
| May | 75% |
| June | 76% |
| July | 76% |
| August | 76% |
| September | 77% |
| October | 75% |
| November | 75% |
| December | 76% |
Average Wind in Pasadena, Texas
Wind patterns in Pasadena, Texas, generally show an average wind speed of 13 mph throughout the year. The average wind speed does not vary much, but it is important to note some differences in other parameters.
January and February are among the windiest months in Pasadena. During these months, the average wind speed can reach up to 15 mph. This is slightly higher than other times of the year.
Wind direction in Pasadena most often comes from the south. Residents may notice breezes that usually head northward.
By using standardized instruments placed at 10 meters above the ground, precise measurements of wind speed are recorded to ensure accuracy.
Wind speeds tend to be more significant during storms or extreme weather conditions, often coinciding with higher precipitation months.
| Month | Average Wind Speed (mph) |
|---|---|
| January | 15 |
| February | 15 |
| March | 14 |
| April | 13 |
| May | 12 |
| June | 11 |
| July | 10 |
| August | 10 |
| September | 11 |
| October | 12 |
| November | 13 |
| December | 14 |
Average Air Quality in Pasadena, Texas
Pasadena, Texas generally experiences good air quality. According to the Air Quality Index (AQI), values typically stay within the “Good” range. This means the air pollution is low and poses little to no risk to the general population.
The main pollutants monitored include particulate matter (PM2.5 and PM10), ozone, and carbon monoxide.
For most of the year, the levels of these pollutants remain low, making the air safe to breathe.
Current Statistics
- AQI Range: 0-50 (Good level)
- PM2.5 Levels: Approximately 10µg/m³
- PM10 Levels: Approximately 23µg/m³
- Temperature Range: Around 84°F (average in summer)
Weather Conditions
Weather greatly influences air quality.
Higher temperatures in summer can sometimes lead to increased ozone levels.
The average summer temperature is around 84°F, which occasionally sees spikes in pollutants.
Additional Info
- Visibility: Typically clear, allowing for visibility over long distances.
- Pressure: Generally stable, averaging about 30 inches of mercury.
Topography of Pasadena, Texas
Pasadena, Texas, located in Harris County, has a relatively flat terrain. The city’s average elevation is approximately 56 feet above sea level.
This low elevation contributes to its subtropical climate and its susceptibility to flooding during heavy rainfall.
The region features a mixture of urban areas and natural landscapes. One key natural feature is the San Jacinto River, which flows through Harris County and influences the area’s topography and drainage systems.
Elevation Highlights:
- Minimum Elevation: Around 25 feet
- Average Elevation: Approximately 56 feet
Due to its topography, Pasadena often experiences flooding. The city’s infrastructure includes numerous drainage channels and levees designed to manage excessive rainfall and mitigate flood risks.
Extreme Weather Events that Occur in Pasadena, Texas
Pasadena, Texas, is no stranger to extreme weather events. The city often experiences severe weather conditions, including tornadoes, hurricanes, hail, and heavy rainfall.
Tornadoes
Pasadena has seen numerous tornadoes. In January 2023, an EF2 tornado with winds up to 120 mph caused significant damage in the area.
Tornadoes can cause widespread destruction, impacting homes and businesses.
Hurricanes
Hurricanes are also common in Pasadena. The city is vulnerable to these powerful storms, which bring strong winds, heavy rain, and flooding.
Past hurricanes have led to evacuations and significant property damage.
Hailstorms
Hailstorms can occur, causing damage to vehicles, roofs, and plants.
Hail sizes can vary, with some storms producing hailstones as large as golf balls. These storms can quickly lead to costly repairs.
Heavy Rainfall
Heavy rainfall is another concern. Pasadena can experience intense rain events, leading to flash floods.
These floods can disrupt daily life, damage infrastructure, and pose risks to residents.
Best Time of the Year to Visit Pasadena, Texas
The best times to visit Pasadena, Texas, are in the spring and fall when the weather is pleasant, and temperatures are moderate. Summers are hot and humid, while winters are mild but cooler.
What Is Pasadena, Texas Like in Spring
Spring in Pasadena, Texas, typically starts around March and continues through May.
During this time, temperatures range from the mid-60s to the mid-80s Fahrenheit.
March and April are known for pleasant weather with less humidity, making it an ideal time for outdoor activities and sightseeing.
Rainfall is moderate in the spring, with occasional thunderstorms. The average monthly rainfall in April is around 3.2 inches.
Visitors can enjoy blooming flowers and vibrant green landscapes. This season is considered the best time to visit for those who prefer mild temperatures and colorful scenery.
What Is Pasadena, Texas Like in Summer
Summers in Pasadena are hot and humid, stretching from June to August.
The hottest month is typically August, with average highs around 92°F and lows in the mid-70s.
During this period, temperatures can sometimes reach as high as 95°F.
Rainfall is frequent, often in the form of afternoon thunderstorms.
Humidity levels are high, making it feel even warmer. Despite the heat, summer is a busy time for tourism due to school holidays. Visitors are advised to stay hydrated and take breaks in the shade.
What Is Pasadena, Texas Like in Fall
Fall in Pasadena, Texas, runs from September to November.
The weather during this season is mild, with temperatures ranging from the mid-60s to the low 80s Fahrenheit.
September sees the most rainfall, averaging around 5.94 inches, mainly due to tropical storms.
By October, the weather becomes more stable and pleasant, with lower humidity and clear skies.
November marks the start of cooler days, with average highs in the mid-70s and lows in the mid-50s. Fall is another ideal time to visit Pasadena for comfortable weather and outdoor events.
What Is Pasadena, Texas Like in Winter
Winters in Pasadena, Texas, are mild, lasting from December to February.
January is the coldest month, with average lows around 47°F and highs in the mid-60s. The cool season is short and usually not severe.
Rainfall is lower in the winter months, making it a good time for those who prefer cooler and drier weather.
The city does not experience snow, and freezes are rare. This season is suitable for visitors looking to avoid the heat and enjoy a quieter time in Pasadena.