Tolono, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Tolono weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain43%1.3″90°70°—
- SundayJul 5Overcast20%—84°69°-6°
- MondayJul 6Mostly Clear14%—82°67°-2°
- TuesdayJul 7Overcast——81°61°-1°
- WednesdayJul 8Clear——82°62°+1°
- ThursdayJul 9Thunderstorm40%—84°70°+2°
- FridayJul 10Light Drizzle40%—79°69°-5°
AQI 31 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 43 now. With UV 6.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 36 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 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43 now. With UV 6.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 36 around 1 PM.
- Present
- AQI 43
- UV peak
- 6.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 36
PM × Wind × Precip
PM2.5 at 7.4 µg/m³, PM10 at 8.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.89
- Wind
- light
- 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).








































If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:48 PM
- Moonset
- 9:59 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Tolono at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: April 16 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61880
16-Day Forecast — Tolono
- Sat90°70°43%
- Sun84°69°20%
- Mon82°67°14%
- Tue81°61°4%
- Wed82°62°3%
- Thu84°70°40%
- Fri79°69°40%
- Sat83°66°15%
- Sun72°58°7%
- Mon71°56°6%
- Tue77°59°11%
- Wed80°63°20%
- Thu82°65°26%
- Fri81°69°32%
- Sat85°70°29%
- Sun82°71°32%
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 — Tolono
SPC has placed Tolono in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 scorching afternoon
Dog-day cicadas emerge in waves, their rasp dominating every sunny hour; heat peaks above 90 degrees daily.
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
Tolono peaks at about 75°F in July and bottoms near 26°F in January; May brings the heaviest rain (4.8 inches) and February the least (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
By the nearest station's NOAA NCEI 1991-2020 normals, Tolono sees 26°F Januarys and 75°F Julys, a 50°F range, plus around 40.9 inches of precipitation across 74 days.
Precipitation in Tolono runs summer-dominant: May averages 4.8 inches across 8.6 days of warm-season storms, while February drops to 2.2 inches over 4.6 rainy days of drier cool air. That puts Tolono in a summer-convective cohort with places like Sadorus, IL, Savoy, IL and Pesotum, IL.
The cool-season window in Tolono starts at mid-April, when nights stop freezing — think kale, peas, spinach, and parsnips. Hold Tolono's tender crops — tomatoes, peppers, basil — until 10-14 days past Tolono's last frost. Tolono's window closes around mid-November as overnight lows return below freezing. Within Tolono, cold-air pooling chills low spots by 5-10°F, shifting Tolono's local frost dates.
Similar climates: Sadorus, IL, Savoy, IL, Pesotum, IL, Philo, IL, Champaign, IL.
Frequently asked
- When does it freeze in Tolono?
- Tolono's last spring frost lands near mid-April, and in Tolono the first fall frost follows around mid-November.
- What is the rainy season in Tolono?
- May is the wettest month in Tolono, about 4.8 inches on average; the year totals roughly 41 inches.
- What is the warmest month in Tolono?
- July is Tolono's warmest month, averaging about 75°F.
- What is the coldest month in Tolono?
- Tolono bottoms out in January, with a mean near 26°F.
- When can I start a vegetable garden in Tolono?
- Frost-hardy sowings begin at mid-April in Tolono; warm-season starts follow two weeks on.
- How many rainy days does Tolono get?
- Expect roughly 74 wet days a year in Tolono.
- What hardiness zone is Tolono?
- Tolono's hardiness zone tracks its winter low; with January near 26°F, check the USDA ZIP map for the exact zone.
- What is the 10-day forecast for Tolono?
- Tolono'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 Tolono?
- See this week's day-by-day rain chances for Tolono in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Tolono?
- Current conditions for Tolono and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Tolono forecast updated?
- The Tolono forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Tolono?
- Today's sunrise and sunset times for Tolono 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 Tolono?
- The next few days in Tolono's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Tolono's humid subtropical climate in Illinois pairs 26°F Januarys with 75°F Julys, 49°F apart across the seasons.
In a typical year Tolono records about 41 inches of precipitation on around 74 days.
At 40.0°N, Tolono's 49°F summer-to-winter swing sets when Tolono's gardens wake and when frost returns.
ZIP codes in Tolono
- 61880