Lewisville, Texas Weather
Thunder quiets the land. Day 93 of summer. Read this microseason across nine climate regions →
Lewisville weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 9:21 AM CDT · Open-Meteo
- TodaySep 21Clear10%—97°75°—
- TuesdaySep 22Overcast——94°76°-3°
- WednesdaySep 23Overcast——97°77°+3°
- ThursdaySep 24Overcast——96°74°-1°
- FridaySep 25Overcast——95°74°-1°
- SaturdaySep 26Overcast——96°77°+1°
- SundaySep 27Light Drizzle11%—101°80°+5°
Air quality now AQI 54 · Moderate
AQI 54 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.3 µg/m³ (AQI 46) with a 0.85 fine-to-coarse ratio and 4 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 during the projected peak around 7 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 31. Overcast through the UV peak window (cloud cover ~92%) — afternoon ozone should stay flat.
- Present
- AQI 31
- UV peak
- 2.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 8.3 µg/m³ (AQI 46) with a 0.85 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.85
- 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
- 4:43 PM
- Moonset
- 2:11 AM
- In sign
- ♑︎ Capricorn
Thunder quiets the land
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Lewisville at a glance
- Today vs. normal: Today averages 86°F (high 97°F, low 75°F), 11°F above the 75°F normal for Sep 21
- Last frost: March 14 (1991–2020 median, NOAA station 13 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant beans, squash, fall brassicas, carrots; harvest beans, summer squash, winter squash
16-Day Forecast — Lewisville
- Mon97°75°10%
- Tue94°76°5%
- Wed97°77°5%
- Thu96°74°1%
- Fri95°74°2%
- Sat96°77°6%
- Sun101°80°11%
- Mon100°74°23%
- Tue89°75°30%
- Wed92°71°17%
- Thu92°73°13%
- Fri92°73°13%
- Sat88°73°16%
- Sun83°64°7%
- Mon77°52°10%
- Tue78°56°9%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Lewisville
Interactive wind and temperature map centered on Lewisville — it loads in your browser. Open the full weather map.
Right now in the garden
Late season
As of September 21, the first frost (around November 17) is about 8 weeks away. Frost-tender plants keep producing until then. This city's planting calendar for September: plant beans, squash, fall brassicas, and carrots; harvest beans, summer squash, and winter squash.
SPC Convective Outlook
Storm Prediction Center — Lewisville
SPC includes Lewisville 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 Lewisville
Lewisville sits in Denton County, where the year’s longest day runs 14h 20m of daylight and its shortest just 9h 58m — a swing of +4h 22m 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 244 miles to the SSE. The nearest town Lewisville tracks is Carrollton, roughly 6 miles to the SE.
Air quality in Lewisville
Air quality in Lewisville’s county has trended dirtier since 2020; its cleanest year on record was 2020 (median AQI 44). See the full air-quality history for Lewisville.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| February | lettuce, peas, spinach, radishes | — |
| March | lettuce, peas, spinach, radishes | radishes |
| April | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| May | tomatoes, squash | lettuce, peas, spinach, beans, summer squash |
| June | squash | tomatoes, peppers, beans, summer squash, garlic |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, summer squash, winter squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, carrots | summer squash, winter squash |
| September | beans, squash, fall brassicas, carrots | beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| November | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| December | — | fall brassicas, carrots |
A year in weather
Lewisville's warmest month is July (~85°F mean) and its coldest is January (~46°F). Rainfall peaks in October (5.3 inches) and bottoms out in July (2.2 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 46° | 2.8″ | 8 |
| February | 50° | 3.4″ | 8 |
| March | 58° | 3.6″ | 9 |
| April | 65° | 3.5″ | 8 |
| May | 73° | 5.2″ | 10 |
| June | 81° | 3.8″ | 7 |
| July | 85° | 2.2″ | 5 |
| August | 85° | 2.5″ | 5 |
| September | 77° | 3.3″ | 6 |
| October | 67° | 5.3″ | 8 |
| November | 56° | 3.0″ | 7 |
| December | 48° | 3.4″ | 8 |
Regional context
Similar climates Hickory Creek, TX, Highland Village, TX, Coppell, TX
In Lewisville, NOAA NCEI 1991-2020 normals put January near 46°F and July near 85°F — a 39°F seasonal arc — with about 41.9 inches of precipitation over 87 rainy or snowy days.
Rainfall in Lewisville splits evenly between the seasons: October tops out at 5.3 inches over 7.8 rainy days, and July logs 2.2 inches across 4.9 — neither half of Lewisville's year dominates. It is a balanced pattern Lewisville shares with places like Hickory Creek, TX, Highland Village, TX and Coppell, TX.
Around March 14, Lewisville sheds its freezing nights — lettuce, chard, arugula, and mustard greens go into Lewisville's beds. Heat-demanding starts go out a fortnight on in Lewisville, after the soil warms and cold snaps clear. By November 17, frost is back in Lewisville — protect or harvest anything tender. Open lawns in Lewisville whiten first when frost returns.
Similar climates: Hickory Creek, TX, Highland Village, TX, Coppell, TX, The Colony, TX, Carrollton, TX.
Frequently asked
- When does it freeze in Lewisville?
- Frost typically leaves Lewisville by March 14 and returns to Lewisville near November 17.
- What is the rainy season in Lewisville?
- October is the wettest month in Lewisville, about 5.3 inches on average; the year totals roughly 42 inches.
- What is the warmest month in Lewisville?
- July is Lewisville's warmest month, averaging about 85°F.
- What is the coldest month in Lewisville?
- Lewisville bottoms out in January, with a mean near 46°F.
- When can I start a vegetable garden in Lewisville?
- Lewisville's last frost (March 14) cues hardy greens; in Lewisville, hold heat-lovers two weeks past.
- How many rainy days does Lewisville get?
- Lewisville averages about 87 days with measurable rain or snow each year.
- What hardiness zone is Lewisville?
- Lewisville sits in the USDA zone set by January lows near 46°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for Lewisville?
- Lewisville'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 Lewisville?
- See this week's day-by-day rain chances for Lewisville in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Lewisville?
- Current conditions for Lewisville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Lewisville forecast updated?
- The Lewisville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Lewisville?
- Today's sunrise and sunset times for Lewisville 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 Lewisville?
- The next few days in Lewisville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Lewisville sits at 33.0°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in Lewisville
- 75029
- 75056
- 75057
- 75065
- 75067
- 75077