Franklin, TN weather: four seasons, tornado season and flood risk

Franklin weather at a glance (Nashville normals)

Franklin weather risk on a home: check flooding first

If you take one weather step before you buy in Franklin, make it the flood check. The county's record points that way: the 2010 flood caused damage in the billions across Middle Tennessee, the deadliest recent tornadoes missed Williamson County, and flood damage isn't covered by a standard homeowners policy. Tornado preparation matters too, but it's a plan you make after you move; flood risk is something you price before you offer.

Franklin flood zone check on FEMA's map

Look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and note the flood zone. Homes near the Harpeth River and its creeks are the ones to look at hardest. If the house is in a high-risk zone and you're using a mortgage, ask your lender whether it will require flood insurance, and the cost belongs in your monthly budget before you set your price.

Flood insurance on a Franklin home

Most standard homeowners policies don't cover flood, so on Franklin's typical $913,277 home the structure has no flood protection unless you buy it separately. FEMA says a flood policy typically takes 30 days to become active, so ask your agent how the timing works with your closing date and get a quote during your inspection period. The Tennessee homeowners insurance guide covers the rest of the policy.

Franklin home inspection items for storms and rain

About 50 inches of rain falls in a normal year, so water is also the everyday weather issue on a house outside the flood zone. Ask your inspector to look at roof age and flashing, gutters and downspouts that carry water away from the foundation, the grading around the house, and any staining in a basement or crawl space. A sump pump, if there is one, should be tested. Each of these is cheaper to negotiate before closing than to fix after the first spring storm season.

Tornado shelter space in a Franklin home

Ask whether the home has a basement or a dedicated safe room. If it doesn't, pick the shelter spot on your first day: the lowest floor, an interior room with no windows. Write it down for everyone in the house.

Franklin, TN weather by season

Expect hot, humid summers, mild winters with occasional ice or snow, and a wet, stormy spring. The figures are from the National Weather Service's Nashville station at the airport, about 20 miles north of Franklin.

Franklin summer weather

July and August average highs near 91°F with lows around 70°F, so nights stay warm. Nashville's record is 109°F, set in June 2012. Plan outdoor work and park walks for early morning, and expect air conditioning to drive the power bill: a 2,000 kWh month is about $249 at Middle Tennessee Electric's 2026 average, covered in the Franklin utilities guide.

Franklin winter weather and snow

January is the coldest month, averaging 49°F by day and 30°F at night. Normal snowfall is 4.7 inches a year, about 2 inches in January and 1.5 in February, so most winters bring a few light events rather than a season of snow. The record low is -17°F, from January 1985.

Rain in Franklin: wettest and driest months

A normal year brings 50.51 inches of precipitation. May is the wettest month at 5.02 inches and October the driest at 3.36.

Spring and fall weather in Franklin

March through May is when most Middle Tennessee tornadoes have formed, so expect warm days broken by lines of storms. Fall is calmer: October is the driest month, and November brings a smaller second round of severe weather.

Franklin weather in 2025

Last year ran wetter than normal: Nashville recorded 54.91 inches of rain, about 4 inches above the normal year. It also had 79 days at or above 90°F, so budget for about two and a half months of air-conditioning weather, not just July and August.

The May 2010 flood: Franklin's record-setting weather event

On May 1 and 2, 2010, Nashville received 13.57 inches of rain, more than double the previous two-day record of 6.68 inches from 1979. Williamson County sat in the band of heaviest rain, averaging 14 to 15 inches over the two days, and observers near Brentwood measured more than 17 inches.

Harpeth River at Franklin, May 2010

The Harpeth River at Franklin crested at 35.32 feet, a record, just above the 35.14 feet reached in 1948. Flood stage there is 30 feet. Downtown sits near the river, which is why the flood map matters most for homes in the low ground along it and its tributaries.

The 2010 flood across Middle Tennessee

The Cumberland River at Nashville crested at 52.55 feet on May 3, against a flood stage of 40. The National Weather Service counts 18 deaths in Middle Tennessee and damage into the billions of dollars, and the area received a Presidential Disaster Declaration.

Tornadoes in Tennessee: Franklin and Williamson County risk

Yes, tornadoes reach Williamson County: the National Weather Service's Nashville office counted 20 there out of 469 across Middle Tennessee from 1830 to 2003.

Tornado season in Middle Tennessee

Nearly two-thirds of Middle Tennessee's tornadoes, 66%, have come in March, April and May. November brings a second, smaller peak, with 30 tornadoes or 6% of the total. The most common hour is between 5 and 6 p.m. Central Standard Time, so have your shelter room settled before spring evenings.

Williamson County tornado history

The same study counts 20 tornadoes in Williamson County from 1830 to 2003, or 3.4 per 100 square miles. Six were rated F3 or stronger and two F4 or stronger. That's about one tornado every eight or nine years in the county across that record.

The March 3, 2020 tornadoes near Nashville

On March 3, 2020, an EF-3 tornado crossed Davidson, Wilson and Smith counties on a 60.13-mile path and killed five people, and an EF-4 near Cookeville killed 19. About two dozen people died across Middle Tennessee. Williamson County wasn't in either path. For later storms, check the event pages at weather.gov/ohx.

Severe weather alerts and a storm plan for a new Franklin home

Set this up in your first week, before you need it.

1. Turn on Wireless Emergency Alerts on every phone in the house.
2. Follow the National Weather Service Nashville office (weather.gov/ohx) for watches and warnings covering Williamson County.
3. Pick the shelter room and keep shoes, a flashlight and a phone charger there.
4. Find your flood zone on FEMA's map and keep a copy of your flood policy, if you have one, with your homeowners policy.
5. Save your electric co-op's outage number.

NWS Nashville alerts for Franklin and Williamson County

The Nashville forecast office covers Franklin. Its watches and warnings are issued by county, so learn to listen for Williamson County.

For the drive north on stormy days see the Franklin to Nashville commute guide, and for everything else start at the relocating to Franklin home page. Bill can point out which homes on your shortlist sit near the river before you visit.