Pasadena, Texas Weather
Thunder quiets the land. Day 93 of summer. Read this microseason across nine climate regions →
Pasadena weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 4:47 AM CDT · Open-Meteo
- TodaySep 21Clear later11%—96°78°—
- TuesdaySep 22Clear19%0.02″96°77°0°
- WednesdaySep 23Partly Cloudy——96°81°0°
- ThursdaySep 24Overcast——96°81°0°
- FridaySep 25Clear——96°79°0°
- SaturdaySep 26Drizzle——93°80°-3°
- SundaySep 27Overcast——93°80°0°
Air quality now AQI 71 · Moderate
AQI 71 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 17.9 µg/m³ (AQI 67) with a 0.90 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 17.9 µg/m³ (AQI 67) with a 0.90 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:28 PM
- Moonset
- 2:12 AM
- In sign
- ♑︎ Capricorn
Thunder quiets the land
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Pasadena at a glance
- Today vs. normal: Today averages 87°F (high 96°F, low 78°F), 8°F above the 79°F normal for Sep 21
- Last frost: January 30 (1991–2020 median, NOAA station 13 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant tomatoes, peppers, beans, squash; harvest summer squash, winter squash
15-Day Forecast — Pasadena
- Mon96°78°10%
- Tue96°77°19%
- Wed96°81°3%
- Thu96°81°1%
- Fri96°79°4%
- Sat93°80°5%
- Sun93°80°8%
- Mon99°80°19%
- Tue97°76°36%
- Wed93°73°26%
- Thu91°75°19%
- Fri90°76°28%
- Sat92°78°26%
- Sun91°79°35%
- Mon89°77°35%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Pasadena
Interactive wind and temperature map centered on Pasadena — it loads in your browser. Open the full weather map.
Right now in the garden
Peak growing season
As of September 21, the growing season is at its peak — the first frost (around December 28) is weeks away. Fall transplants go in about 10–12 weeks before the first frost, October 5 to October 19 here. This city's planting calendar for September: plant tomatoes, peppers, beans, and squash; harvest summer squash and winter squash.
SPC Convective Outlook
Storm Prediction Center — Pasadena
SPC includes Pasadena in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Pasadena
Pasadena sits in Harris County, where the year’s longest day runs 14h 3m of daylight and its shortest just 10h 14m — a swing of +3h 49m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Houston, the state’s largest city, lies about 17 miles to the WNW. The nearest town Pasadena tracks is Pearland, roughly 12 miles to the WSW.
Air quality in Pasadena
Air quality in Pasadena’s county has trended dirtier since 2020; its cleanest year on record was 2020 (median AQI 56). See the full air-quality history for Pasadena.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | fall brassicas, carrots |
| February | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, spinach, radishes |
| March | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| April | beans, squash | lettuce, peas, spinach, beans, summer squash |
| May | squash | tomatoes, peppers, beans, summer squash, garlic |
| June | squash | tomatoes, peppers, beans, summer squash, winter squash |
| July | beans, squash | tomatoes, summer squash, winter squash |
| August | beans, squash | summer squash, winter squash |
| September | tomatoes, peppers, beans, squash | summer squash, winter squash |
| October | beans, squash, fall brassicas, carrots | beans, summer squash, winter squash |
| November | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| December | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
A year in weather
August is Pasadena's warmest stretch (~85°F) and January its coldest (~55°F); precipitation crests in June at 6.1 inches and ebbs in February to 2.9 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 55° | 4.1″ | 10 |
| February | 59° | 2.9″ | 9 |
| March | 65° | 3.3″ | 8 |
| April | 71° | 4.1″ | 8 |
| May | 78° | 5.4″ | 8 |
| June | 83° | 6.1″ | 10 |
| July | 85° | 4.6″ | 9 |
| August | 85° | 5.4″ | 10 |
| September | 81° | 5.8″ | 10 |
| October | 73° | 5.8″ | 7 |
| November | 63° | 3.9″ | 8 |
| December | 57° | 4.3″ | 10 |
Regional context
Similar climates Deer Park, TX, South Houston, TX, La Porte, TX
Pasadena's climate, from NOAA NCEI 1991-2020 station normals, pairs 55°F Januarys with 85°F Julys — a 30°F swing. About 55.6 inches of precipitation falls over roughly 107 days a year.
Summer convection drives Pasadena's precipitation: June logs 6.1 inches on 10.4 rainy days, against February's 2.9 inches on 8.9 — warm-season storms carry Pasadena's moisture. That puts Pasadena in a summer-convective cohort with places like Deer Park, TX, South Houston, TX and La Porte, TX.
Pasadena's growing window opens around January 30, once Pasadena's overnight lows stop freezing — sow lettuce, chard, arugula, and mustard greens. In Pasadena, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Pasadena's frost date. Pasadena's window closes around December 28 as Pasadena's overnight lows return below freezing. In about half of years, Pasadena's last freeze comes after January 30.
Similar climates: Deer Park, TX, South Houston, TX, La Porte, TX, Galena Park, TX, Taylor Lake Village, TX.
Frequently asked
- When does it freeze in Pasadena?
- In Pasadena, expect the last spring frost near January 30; Pasadena's first autumn frost comes around December 28.
- What is the rainy season in Pasadena?
- Pasadena sees its heaviest rain in June (around 6.1 inches), part of roughly 56 inches a year.
- What is the warmest month in Pasadena?
- On average August tops the year in Pasadena at about 85°F.
- What is the coldest month in Pasadena?
- The coldest stretch in Pasadena falls in January, around 55°F on average.
- When can I start a vegetable garden in Pasadena?
- In Pasadena, sow peas and hardy greens around January 30; Pasadena's tomatoes and peppers wait two weeks more.
- How many rainy days does Pasadena get?
- Expect roughly 107 wet days a year in Pasadena.
- What hardiness zone is Pasadena?
- With January around 55°F, Pasadena's zone reflects that minimum — the USDA ZIP map confirms Pasadena's band.
- What is the 10-day forecast for Pasadena?
- Pasadena's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Pasadena?
- See this week's day-by-day rain chances for Pasadena in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Pasadena?
- Current conditions for Pasadena and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Pasadena forecast updated?
- The Pasadena forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Pasadena?
- Today's sunrise and sunset times for Pasadena are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Pasadena?
- The next few days in Pasadena's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Pasadena sits at 29.7°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in Pasadena
- 77058
- 77059
- 77258
- 77501
- 77502
- 77503
- 77504
- 77505
- 77506
- 77507
- 77508
- 77586