Crystal Lawns, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Crystal Lawns weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Showers80%2.2″81°70°—
- SundayJul 5Overcast15%—79°66°-2°
- MondayJul 6Overcast——81°66°+2°
- TuesdayJul 7Overcast——84°62°+3°
- WednesdayJul 8Overcast25%—82°62°-2°
- ThursdayJul 9T-storm w/ Hail39%0.14″79°67°-3°
- FridayJul 10Overcast39%—82°64°+3°
AQI 37 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM scrubbed by 2 hours of recent rain — PM2.5 down to 7.6 µg/m³, PM10 to 8.1 µg/m³.
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 32. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 32
- UV peak
- 2.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 7.6 µg/m³, PM10 to 8.1 µg/m³.
- PM2.5/PM10
- 0.94
- Wind
- light
- Recent rain
- 2h in last 6h
- Pattern
- washed out
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
- 10:50 PM
- Moonset
- 9:57 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Crystal Lawns at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 25 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Crystal Lawns
- Sat81°70°80%
- Sun79°66°15%
- Mon81°66°3%
- Tue84°62°3%
- Wed82°62°25%
- Thu79°67°39%
- Fri82°64°39%
- Sat82°64°15%
- Sun69°60°9%
- Mon76°56°10%
- Tue78°61°10%
- Wed81°63°29%
- Thu84°66°25%
- Fri83°70°19%
- Sat87°70°24%
- Sun85°71°33%
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 — Crystal Lawns
SPC has placed Crystal Lawns in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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
The year in Crystal Lawns tops out in July (~76°F) and dips lowest in January (~24°F), with May wettest at 4.4 inches and January driest at 1.8 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 24° | 1.8″ | 14 |
| February | 27° | 1.9″ | 12 |
| March | 38° | 3.0″ | 15 |
| April | 51° | 3.7″ | 17 |
| May | 60° | 4.4″ | 17 |
| June | 70° | 4.1″ | 15 |
| July | 76° | 2.9″ | 15 |
| August | 76° | 3.0″ | 13 |
| September | 68° | 3.0″ | 13 |
| October | 55° | 2.9″ | 12 |
| November | 40° | 3.2″ | 12 |
| December | 28° | 2.3″ | 13 |
Frequently asked
- When does it freeze in Crystal Lawns?
- Frost typically leaves Crystal Lawns by mid-April and returns to Crystal Lawns near mid-November.
- What is the rainy season in Crystal Lawns?
- Crystal Lawns sees its heaviest rain in May (around 4.4 inches), part of roughly 36 inches a year.
- What is the warmest month in Crystal Lawns?
- July is Crystal Lawns's warmest month, averaging about 76°F.
- What is the coldest month in Crystal Lawns?
- Crystal Lawns bottoms out in January, with a mean near 24°F.
- When can I start a vegetable garden in Crystal Lawns?
- Time tomatoes in Crystal Lawns for two weeks after mid-April; peas and greens start at Crystal Lawns's frost line.
- How many rainy days does Crystal Lawns get?
- Crystal Lawns records around 170 days of measurable precipitation annually.
- What hardiness zone is Crystal Lawns?
- Crystal Lawns sits in the USDA zone set by January lows near 24°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for Crystal Lawns?
- Crystal Lawns'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 Crystal Lawns?
- See this week's day-by-day rain chances for Crystal Lawns in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Crystal Lawns?
- Current conditions for Crystal Lawns and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Crystal Lawns forecast updated?
- The Crystal Lawns forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Crystal Lawns?
- Today's sunrise and sunset times for Crystal Lawns 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 Crystal Lawns?
- The next few days in Crystal Lawns's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Crystal Lawns's warm-summer humid continental climate in Illinois pairs 24°F Januarys with 76°F Julys, 52°F apart across the seasons.
In a typical year Crystal Lawns records about 36 inches of precipitation on around 170 days.
At 41.6°N, Crystal Lawns's 52°F summer-to-winter swing sets when Crystal Lawns's gardens wake and when frost returns.
ZIP codes in Crystal Lawns
- 60431
- 60435