Louisville, Ohio Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Louisville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——82°52°—
- FridayJun 5Overcast——85°59°+3°
- SaturdayJun 6Showers84%—77°62°-8°
- SundayJun 7Light Drizzle61%—80°61°+3°
- MondayJun 8Overcast——80°58°0°
- TuesdayJun 9Overcast11%—84°62°+4°
- WednesdayJun 10Overcast24%—82°62°-2°
PM2.5 at 12.8 µg/m³ (AQI 58) with a 0.96 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust. AQI down 24 over the last 6 hours — air quality is improving sharply.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 12.8 µg/m³ (AQI 58) with a 0.96 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.96
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 3:56 AM
- Moonset
- 1:22 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Louisville at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: April 21 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Louisville's warmest month is July (~74°F mean) and its coldest is January (~28°F). Rainfall peaks in June (4.4 inches) and bottoms out in February (2.4 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 28° | 2.9″ | 7 |
| February | 30° | 2.4″ | 7 |
| March | 39° | 3.2″ | 8 |
| April | 51° | 3.9″ | 9 |
| May | 61° | 4.1″ | 9 |
| June | 70° | 4.4″ | 8 |
| July | 74° | 4.1″ | 7 |
| August | 72° | 3.6″ | 6 |
| September | 65° | 3.5″ | 6 |
| October | 54° | 3.3″ | 7 |
| November | 43° | 3.1″ | 7 |
| December | 33° | 2.9″ | 7 |
Regional context
Louisville sits within a warm-summer humid continental climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Cleveland, OH, Akron, OH, Toledo, OH, Youngstown, OH, Canton, OH.
Frequently asked
- When does it freeze in Louisville?
- Louisville's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Louisville?
- June is the wettest month with about 4.4 inches of rain on average; the city receives roughly 42 inches annually.
- What is the warmest month in Louisville?
- July is typically warmest, averaging about 74°F.
- What is the coldest month in Louisville?
- January is typically coldest, averaging about 28°F.
- When can I start a vegetable garden in Louisville?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Louisville get?
- Louisville averages about 89 rainy days per year.
- What hardiness zone is Louisville?
- Louisville's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Louisville, Ohio sits in a warm-summer humid continental climate zone. January means hover near 28°F while July averages 74°F — a 46°F seasonal swing.
Across the year, Louisville receives about 42 inches of precipitation spread over roughly 89 rainy days.
The rhythm of the year is set by latitude (40.8°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.