Urbana, Illinois Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Urbana weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——84°56°—
- FridayJun 5Overcast18%—85°66°+1°
- SaturdayJun 6Heavy Drizzle50%—85°69°0°
- SundayJun 7Drizzle35%0.01″81°70°-4°
- MondayJun 8Showers60%0.09″76°69°-5°
- TuesdayJun 9Drizzle32%—78°69°+2°
- WednesdayJun 10Light Drizzle25%—78°70°0°
Ozone at AQI 76 now. AQI flat over the last 6 hours (within ±3 points). With UV 9.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 91 by mid-afternoon.
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 76 now. With UV 9.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 91 by mid-afternoon.
- Present
- AQI 76
- UV peak
- 9.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 91
PM × Wind × Precip
PM2.5 at 5.8 µg/m³, PM10 at 7.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.81
- Wind
- breezy
- 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
- 4:22 AM
- Moonset
- 1:54 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Urbana at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: April 17 (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.
SPC Convective Outlook
Storm Prediction Center — Urbana
SPC has placed Urbana in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- 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.
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
Urbana's warmest month is July (~75°F mean) and its coldest is January (~26°F). Rainfall peaks in May (4.8 inches) and bottoms out in February (2.2 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 26° | 2.3″ | 5 |
| February | 30° | 2.2″ | 5 |
| March | 41° | 2.8″ | 6 |
| April | 52° | 3.9″ | 8 |
| May | 63° | 4.8″ | 9 |
| June | 72° | 4.6″ | 7 |
| July | 75° | 4.5″ | 7 |
| August | 74° | 3.5″ | 6 |
| September | 67° | 3.4″ | 5 |
| October | 55° | 3.4″ | 6 |
| November | 41° | 3.2″ | 6 |
| December | 31° | 2.4″ | 5 |
Regional context
Urbana sits within a humid subtropical climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Peoria, IL, Springfield, IL, Champaign, IL, Bloomington, IL, Alton, IL.
Frequently asked
- When does it freeze in Urbana?
- Urbana's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Urbana?
- May is the wettest month with about 4.8 inches of rain on average; the city receives roughly 41 inches annually.
- What is the warmest month in Urbana?
- July is typically warmest, averaging about 75°F.
- What is the coldest month in Urbana?
- January is typically coldest, averaging about 26°F.
- When can I start a vegetable garden in Urbana?
- 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 Urbana get?
- Urbana averages about 74 rainy days per year.
- What hardiness zone is Urbana?
- Urbana'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
Urbana, Illinois sits in a humid subtropical climate zone. January means hover near 26°F while July averages 75°F — a 50°F seasonal swing.
Across the year, Urbana receives about 41 inches of precipitation spread over roughly 74 rainy days.
The rhythm of the year is set by latitude (40.1°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.