Natural hazards · Koshkonong

Koshkonong, WI natural hazards

Most of the natural-hazard damage FEMA expects in Koshkonong comes from inland flooding, and overall the risk is moderate for a U.S. community. 3 federal disasters brought FEMA money into town.

FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarations

Expected damage

How exposed is Koshkonong?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Koshkonong to be higher than in 46% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding58%Tornadoes15%Cold waves13%Hail7%Everything else8%

By hazard

What Koshkonong faces

Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.

Inland flooding

58% of expected damage

Above average · higher than 63% of U.S. places

Recorded about 2 times a year in the area

Tornadoes

15% of expected damage

Well above average · higher than 83% of U.S. places

Recorded about once every 78 years in the area

Cold waves

13% of expected damage

Below average · higher than 33% of U.S. places

Recorded about 5 times a year in the area

Hail

7% of expected damage

Well above average · higher than 90% of U.S. places

Recorded about 4 times a year in the area

Lower here

HurricanesIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingAvalanchesTsunamisVolcanic activity

Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.

Flood insurance claims

Does Koshkonong flood?

FEMA's records show no paid flood insurance claims in Koshkonong.

of homes in flood zones
are insured

of all homes
are insured

No community discount. Koshkonong isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Jefferson County.

Disasters that hit Koshkonong

3 federal disasters brought FEMA money here

Disasters the President declared that paid out in Koshkonong itself: aid to households, or repair grants to the Town of Koshkonong.

Brought FEMA money into KoshkonongDeclared for Jefferson County only

2008

Severe Storms, Tornadoes, and Flooding

$13K to the Town of Koshkonong for repairs

2008

Record Snow and Near Record Snow

$8K to the Town of Koshkonong for repairs

2004

Severe Storms and Flooding

$66K to the Town of Koshkonong for repairs

Jefferson County has had 12 natural disasters declared since 1953, most often severe storms and floods.

Around Koshkonong

Koshkonong and the towns around it

Very lowLowModerateHighVery high

Sumnermostly inland floodingHigh

Fort Atkinsonmostly inland floodingHigh

Koshkonongmostly inland floodingModerate

Limamostly inland floodingModerate

Miltonmostly inland floodingModerate

Jeffersonmostly inland floodingLow

Hebronmostly inland floodingLow

Cold Springmostly inland floodingLow

About these numbers

How to read this page

An average, not a forecastFEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.

Compared by rate“Higher than N%” compares yearly damage as a share of what’s here, so a big city isn’t rated riskier just for having more buildings. Koshkonong covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Koshkonong’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Koshkonong. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

FEMA’s expected losses across Koshkonong total about $943K a year, counting buildings, people and crops.

Sources: FEMA National Risk Index (December 2025); OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Census tracts: U.S. Census Bureau.