Hornsby, Tennessee Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Hornsby weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast20%—94°70°—
- SundayJul 5Overcast31%—91°75°-3°
- MondayJul 6Thunderstorm33%—92°71°+1°
- TuesdayJul 7Overcast——88°68°-4°
- WednesdayJul 8Overcast10%—94°66°+6°
- ThursdayJul 9Overcast16%—94°69°0°
- FridayJul 10Partly Cloudy30%—99°75°+5°
AQI 54 (Moderate), driven by Ozone. AQI up 20 in the last 6 hours — air quality is degrading. Ozone at AQI 71 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
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 71 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 71
- UV peak
- 3.5 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 71
PM × Wind × Precip
PM2.5 at 12.0 µg/m³, PM10 at 14.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.83
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:44 PM
- Moonset
- 10:06 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Hornsby at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: March 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 38044
16-Day Forecast — Hornsby
- Sat94°70°20%
- Sun91°74°31%
- Mon92°71°33%
- Tue88°68°9%
- Wed94°66°10%
- Thu94°69°16%
- Fri99°75°30%
- Sat85°72°40%
- Sun83°63°27%
- Mon83°60°12%
- Tue86°61°10%
- Wed88°64°28%
- Thu83°67°36%
- Fri93°70°55%
- Sat85°70°36%
- Sun79°68°32%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Hornsby
SPC includes Hornsby in the general thunderstorm area today — no severe risk, but storms are possible.
- 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.
ZIP codes in Hornsby
- 38008
- 38044