Duncanville, Texas Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Duncanville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast23%—83°70°—
- FridayJun 5Light Showers28%0.01″80°70°-3°
- SaturdayJun 6Light Drizzle56%—85°73°+5°
- SundayJun 7Light Showers40%—92°73°+7°
- MondayJun 8Overcast21%—92°74°0°
- TuesdayJun 9Overcast——95°75°+3°
- WednesdayJun 10Overcast——95°76°0°
PM2.5 at 10.3 µg/m³ (AQI 53) with a 0.94 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. AQI down 48 over the last 6 hours — air quality is improving sharply.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 38. Overcast through the UV peak window (cloud cover ~66%) — afternoon ozone should stay flat.
- Present
- AQI 38
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 10.3 µg/m³ (AQI 53) with a 0.94 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.94
- Wind
- light
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:36 AM
- Moonset
- 2:51 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Duncanville at a glance
- Today vs. normal: 7°F below the seasonal normal for this latitude
- Last frost: March 3 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Duncanville
SPC has placed Duncanville in the General Thunderstorms category for severe thunderstorms today.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
Duncanville's warmest month is August (~86°F mean) and its coldest is January (~47°F). Rainfall peaks in October (4.7 inches) and bottoms out in August (1.7 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 47° | 2.3″ | 4 |
| February | 51° | 2.6″ | 4 |
| March | 59° | 3.4″ | 5 |
| April | 66° | 3.1″ | 4 |
| May | 74° | 4.3″ | 6 |
| June | 82° | 3.5″ | 5 |
| July | 85° | 1.7″ | 3 |
| August | 86° | 1.7″ | 3 |
| September | 79° | 3.3″ | 4 |
| October | 68° | 4.7″ | 5 |
| November | 57° | 2.6″ | 4 |
| December | 49° | 2.8″ | 4 |
Regional context
Duncanville sits within a humid subtropical climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Houston, TX, Dallas, TX, San Antonio, TX, Austin, TX, Fort Worth, TX.
Frequently asked
- When does it freeze in Duncanville?
- Duncanville's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Duncanville?
- October is the wettest month with about 4.7 inches of rain on average; the city receives roughly 36 inches annually.
- What is the warmest month in Duncanville?
- August is typically warmest, averaging about 86°F.
- What is the coldest month in Duncanville?
- January is typically coldest, averaging about 47°F.
- When can I start a vegetable garden in Duncanville?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Duncanville get?
- Duncanville averages about 49 rainy days per year.
- What hardiness zone is Duncanville?
- Duncanville's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Duncanville, Texas sits in a humid subtropical climate zone. January means hover near 47°F while July averages 85°F — a 38°F seasonal swing.
Across the year, Duncanville receives about 36 inches of precipitation spread over roughly 49 rainy days.
The rhythm of the year is set by latitude (32.6°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.