Vermilion, Ohio Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Vermilion weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast32%—87°72°—
- SundayJul 5Heavy Rain34%0.81″79°71°-8°
- MondayJul 6Light Drizzle29%—75°69°-4°
- TuesdayJul 7Light Drizzle12%—76°70°+1°
- WednesdayJul 8Light Drizzle——83°64°+7°
- ThursdayJul 9Thunderstorm36%—82°67°-1°
- FridayJul 10Light Drizzle36%—78°71°-4°
AQI 46 (Good), driven by Ozone. AQI down 16 over the last 6 hours — air quality is improving sharply. Ozone at AQI 50 now. With UV 4.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 27 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 50 now. With UV 4.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 27 around 1 PM.
- Present
- AQI 50
- UV peak
- 4.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 27
PM × Wind × Precip
PM2.5 at 7.0 µg/m³ (AQI 39) with a 0.95 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.95
- Wind
- light
- 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).








































If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:25 PM
- Moonset
- 10:32 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Vermilion at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 24 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 44089
16-Day Forecast — Vermilion
- Sat86°72°32%
- Sun79°71°34%
- Mon75°69°29%
- Tue76°70°12%
- Wed83°64°9%
- Thu82°67°36%
- Fri78°71°36%
- Sat79°68°32%
- Sun76°67°25%
- Mon66°62°18%
- Tue75°61°20%
- Wed83°65°24%
- Thu85°69°29%
- Fri83°72°26%
- Sat82°69°24%
- Sun82°67°23%
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 — Vermilion
SPC has placed Vermilion in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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.
Microseason · July 1–5
Cicadas claim the afternoon
Annual cicada buzz begins, peaking in the heat of the day.
Day 185 of 365 · Wedge 37 of 72
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
July is Vermilion's warmest stretch (~76°F) and January its coldest (~28°F); precipitation crests in May at 4.4 inches and ebbs in January to 3.1 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 28° | 3.1″ | 23 |
| February | 30° | 3.2″ | 20 |
| March | 37° | 3.7″ | 20 |
| April | 48° | 3.8″ | 19 |
| May | 59° | 4.4″ | 18 |
| June | 70° | 4.1″ | 16 |
| July | 76° | 3.3″ | 15 |
| August | 74° | 3.3″ | 14 |
| September | 68° | 3.2″ | 14 |
| October | 56° | 3.1″ | 16 |
| November | 43° | 3.6″ | 20 |
| December | 32° | 3.7″ | 22 |
Regional context
By the nearest station's NOAA NCEI 1991-2020 normals, Vermilion sees 28°F Januarys and 76°F Julys, a 48°F range, plus around 42.4 inches of precipitation across 215 days.
No season owns Vermilion's rain: May reaches 4.4 inches across 17.8 days and January keeps 3.1 inches on 22.8, an even spread through Vermilion's year. It is a balanced pattern Vermilion shares with places like Amherst, OH, South Amherst, OH and Birmingham, OH.
The cool-season window in Vermilion starts at mid-April, when nights stop freezing — think kale, peas, spinach, and parsnips. In Vermilion, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Vermilion's frost date. Around mid-November, freezing nights resume in Vermilion and tender crops must come in. In Vermilion, low spots run 4-7°F colder than nearby slopes, nudging Vermilion's frost dates a week.
Similar climates: Amherst, OH, South Amherst, OH, Birmingham, OH, Beulah Beach, OH, Lorain, OH.
Frequently asked
- When does it freeze in Vermilion?
- Frost typically leaves Vermilion by mid-April and returns to Vermilion near mid-November.
- What is the rainy season in Vermilion?
- Rainfall in Vermilion peaks in May near 4.4 inches, out of about 42 inches annually.
- What is the warmest month in Vermilion?
- The warmest stretch in Vermilion comes in July, around 76°F on average.
- What is the coldest month in Vermilion?
- On average January is the chilliest month in Vermilion, about 28°F.
- When can I start a vegetable garden in Vermilion?
- Time tomatoes in Vermilion for two weeks after mid-April; peas and greens start at Vermilion's frost line.
- How many rainy days does Vermilion get?
- Vermilion records around 215 days of measurable precipitation annually.
- What hardiness zone is Vermilion?
- Vermilion's hardiness zone tracks its winter low; with January near 28°F, check the USDA ZIP map for the exact zone.
- What is the 10-day forecast for Vermilion?
- Vermilion'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 Vermilion?
- See this week's day-by-day rain chances for Vermilion in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Vermilion?
- Current conditions for Vermilion and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Vermilion forecast updated?
- The Vermilion forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Vermilion?
- Today's sunrise and sunset times for Vermilion are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Vermilion?
- The next few days in Vermilion's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Vermilion's warm-summer humid continental climate in Ohio pairs 28°F Januarys with 76°F Julys, 48°F apart across the seasons.
Across the year, Vermilion collects about 42 inches of precipitation over roughly 215 days with measurable rain or snow.
The 48°F gap between Vermilion's summer and winter, at 41.4°N, shapes Vermilion's frost calendar.
ZIP codes in Vermilion
- 44089