Smithville, Tennessee Weather
Sun climbs to its northern throne. Day 88 of spring. Read this microseason across nine climate regions →
Smithville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Foggy——77°59°—
- TuesdayJun 16Overcast——83°61°+6°
- WednesdayJun 17Thunderstorm——83°63°0°
- ThursdayJun 18T-storm w/ Hail69%0.01″78°68°-5°
- FridayJun 19Light Showers71%0.05″71°62°-7°
- SaturdayJun 20Overcast——79°59°+8°
- SundayJun 21Partly Cloudy31%—83°58°+4°
AQI 38 (Good), driven by Ozone. AQI up 13 over the last 6 hours (gradual rise). Ozone at AQI 44 — 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 44 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 44
- UV peak
- 3.8 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 44
PM × Wind × Precip
PM2.5 at 5.6 µg/m³, PM10 at 6.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:32 AM
- Moonset
- 8:13 PM
- In sign
- ♋︎ Cancer
Sun climbs to its northern throne
Smithville at a glance
- Today vs. normal: 77°F — typical for the season
- Last frost: March 23 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Smithville
- Mon77°59°1%
- Tue83°61°4%
- Wed83°63°9%
- Thu78°68°69%
- Fri71°62°71%
- Sat79°59°6%
- Sun83°58°31%
- Mon87°69°51%
- Tue82°67°51%
- Wed85°67°26%
- Thu78°68°20%
- Fri83°65°59%
- Sat84°63°43%
- Sun89°68°45%
- Mon85°70°49%
- Tue79°68°59%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 15, 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 — Smithville
SPC has placed Smithville in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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.
Microseason · June 11–15
Sun climbs to its northern throne
Days lengthen toward solstice; longest light lingers until after 8 PM, heat building steadily.
Day 166 of 365 · Wedge 33 of 72
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
July is Smithville's warmest stretch (~77°F) and January its coldest (~36°F); precipitation crests in March at 5.7 inches and ebbs in October to 3.3 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 36° | 4.9″ | 8 |
| February | 40° | 5.1″ | 8 |
| March | 47° | 5.7″ | 9 |
| April | 56° | 5.0″ | 8 |
| May | 65° | 4.9″ | 8 |
| June | 73° | 5.1″ | 8 |
| July | 77° | 5.2″ | 8 |
| August | 75° | 3.9″ | 6 |
| September | 69° | 4.0″ | 6 |
| October | 58° | 3.3″ | 6 |
| November | 47° | 4.2″ | 6 |
| December | 40° | 5.7″ | 9 |
Regional context
By the nearest station's NOAA NCEI 1991-2020 normals, Smithville sees 36°F Januarys and 77°F Julys, a 40°F range, plus around 57 inches of precipitation across 89 days.
No season owns Smithville's rain: March reaches 5.7 inches across 8.8 days and October keeps 3.3 inches on 5.8, an even spread through Smithville's year. That lines Smithville up with places like Dowelltown, TN, Liberty, TN and Hickman, TN, fed by overlapping storm tracks.
Smithville's growing window opens around mid-March, once Smithville's overnight lows stop freezing — sow peas, lettuce, spinach, and radishes. Hold Smithville's tender crops — tomatoes, peppers, basil — until 10-14 days past Smithville's last frost. Smithville's window closes around mid-December as overnight lows return below freezing. In Smithville, low spots run 4-7°F colder than nearby slopes, nudging Smithville's frost dates a week.
Similar climates: Dowelltown, TN, Liberty, TN, Hickman, TN, Alexandria, TN, Auburntown, TN.
Frequently asked
- When does it freeze in Smithville?
- Frost typically leaves Smithville by mid-March and returns to Smithville near mid-December.
- What is the rainy season in Smithville?
- Smithville sees its heaviest rain in March (around 5.7 inches), part of roughly 57 inches a year.
- What is the warmest month in Smithville?
- Smithville peaks in July, when the mean runs near 77°F.
- What is the coldest month in Smithville?
- January is Smithville's coldest month, averaging about 36°F.
- When can I start a vegetable garden in Smithville?
- In Smithville, sow peas and hardy greens around mid-March; Smithville's tomatoes and peppers wait two weeks more.
- How many rainy days does Smithville get?
- Smithville averages about 89 days with measurable rain or snow each year.
- What hardiness zone is Smithville?
- Since January in Smithville averages 36°F, Smithville's USDA zone follows that floor — confirm it by ZIP.
- What is the 10-day forecast for Smithville?
- Smithville'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 Smithville?
- See this week's day-by-day rain chances for Smithville in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Smithville?
- Current conditions for Smithville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Smithville forecast updated?
- The Smithville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Smithville?
- Day length in Smithville peaks around the June solstice — earliest sunrise and latest sunset — and is shortest near the December solstice.
- How accurate is the weather forecast for Smithville?
- The next few days in Smithville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
In Smithville, Tennessee, the humid subtropical climate runs from about 36°F in January to 77°F in July, a 41°F seasonal range.
Smithville sees close to 57 inches of precipitation annually, falling across some 89 wet days.
From 36.0°N, Smithville sees a 41°F seasonal swing that governs Smithville's planting and frost windows.
ZIP codes in Smithville
- 37166