Castalian Springs, Tennessee Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Castalian Springs weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Foggy10%—92°68°—
- SundayJul 5Heavy Rain28%3.9″92°71°0°
- MondayJul 6Heavy Rain32%0.29″88°69°-4°
- TuesdayJul 7Light Drizzle17%—82°66°-6°
- WednesdayJul 8Overcast10%—87°64°+5°
- ThursdayJul 9Overcast20%—93°65°+6°
- FridayJul 10Overcast55%—95°72°+2°
AQI 76 (Moderate), driven by Ozone. AQI up 44 in the last 6 hours — air quality is degrading. Ozone at AQI 108 — 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 108 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 108
- UV peak
- 3.7 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 108
PM × Wind × Precip
PM2.5 at 11.6 µg/m³, PM10 at 12.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.90
- 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
- 10:35 PM
- Moonset
- 9:55 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Castalian Springs at a glance
- Today vs. normal: 17°F above the seasonal normal for this latitude
- Last frost: March 25 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 37031
16-Day Forecast — Castalian Springs
- Sat92°68°10%
- Sun92°71°28%
- Mon88°69°32%
- Tue82°66°17%
- Wed87°64°10%
- Thu93°65°20%
- Fri95°72°55%
- Sat81°70°48%
- Sun80°61°30%
- Mon80°56°19%
- Tue82°59°12%
- Wed87°61°32%
- Thu85°68°39%
- Fri89°68°45%
- Sat85°69°52%
- Sun82°68°47%
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 — Castalian Springs
SPC has placed Castalian Springs in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Castalian Springs
- 37031