Today
Sun, Jun 21
Violent rain showers
77°63°
- Rain chance
- 86%
- Precip
- 2.2 in
- Max wind
- 20 mph
Jacksonville weather forecast
Illinois, United States · Chicago time · 39.73°, -90.23°
Heavy rain today: around 56 mm expected.
Heavy rain today: around 56 mm expected.
Derived advisory — not an official warning
Current conditions · 6:30 AM local
Current conditions in Jacksonville
66°F
Overcast
Feels like 68°F
- Humidity
- 81%
- Wind
- 6 mph ESE
- Gusts
- 16 mph
- UV index
- 0
- Visibility
- 10.9 mi
Right now
Jacksonville is currently seeing overcast, with 19 °C on the thermometer. It feels close to the actual reading at 18 °C. Wind is from the ESE at 10 km/h, gusting to 26 km/h. Humidity stands at 69% with sea-level pressure near 1012 hPa.
At a glance
Today
77° / 63°Violent rain showers · rain likely (86%)
Tomorrow
73° / 61°Overcast
Upcoming · to Saturday
77° / 54°A steady stretch: highs near 77°, lows around 54°, and no day above a 44% rain chance through Saturday.
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Next 3 days
Today looks like violent rain showers; temperatures run from 17 °C up to 25 °C. Rain chance peaks at 86% with around 55.5 mm possible. Gusts may reach 55 km/h from the SE. Tomorrow looks like overcast; temperatures run from 16 °C up to 22 °C. Gusts may reach 48 km/h from the N. Tuesday brings overcast with a high of 24 °C and a low of 12 °C.
Tomorrow
Mon, Jun 22
Overcast
73°61°
- Rain chance
- 9%
- Precip
- 0 in
- Max wind
- 14 mph
Tuesday
Tue, Jun 23
Overcast
75°54°
- Rain chance
- 2%
- Precip
- 0 in
- Max wind
- 8 mph
Next 48 hours
- 12 AM65°0%1 mph
- 1 AM64°1%2 mph
- 2 AM64°1%4 mph
- 3 AM63°2%0 mph
- 4 AM64°2%4 mph
- 5 AM64°2%4 mph
- 6 AM64°10%6 mph
- 7 AM67°27%8 mph
- 8 AM70°29%11 mph
- 9 AM73°28%13 mph
- 10 AM75°25%15 mph
- 11 AM77°38%15 mph
- 12 PM76°71%14 mph
- 1 PM74°86%16 mph
- 2 PM70°75%20 mph
- 3 PM71°81%15 mph
- 4 PM70°69%13 mph
- 5 PM73°63%14 mph
- 6 PM73°46%18 mph
- 7 PM71°50%15 mph
- 8 PM69°41%11 mph
- 9 PM65°24%12 mph
- 10 PM63°14%13 mph
- 11 PM66°12%7 mph
- 12 AM66°9%12 mph
- 1 AM63°4%14 mph
- 2 AM61°3%11 mph
- 3 AM61°2%11 mph
- 4 AM61°3%9 mph
- 5 AM61°2%14 mph
- 6 AM61°2%11 mph
- 7 AM61°3%11 mph
- 8 AM62°2%12 mph
- 9 AM63°1%12 mph
- 10 AM64°1%11 mph
- 11 AM65°1%11 mph
- 12 PM66°1%10 mph
- 1 PM68°1%8 mph
- 2 PM69°1%8 mph
- 3 PM70°1%8 mph
- 4 PM71°1%6 mph
- 5 PM72°1%7 mph
- 6 PM73°7%6 mph
- 7 PM72°7%5 mph
- 8 PM70°0%2 mph
- 9 PM68°0%2 mph
- 10 PM66°0%3 mph
- 11 PM64°0%4 mph
In depth
Jacksonville starts the period under overcast, with the mercury at 19 °C and a feels-like of 18 °C. Today's forecast calls for violent rain showers, topping out near 25 °C before falling back to 17 °C overnight. Winds blow mainly from the SE around 32 km/h, with gusts up to 55 km/h. Daytime highs hold fairly steady this week, staying within 22 to 25 °C. Rain is in the picture on today, Wednesday, Thursday and beyond, with roughly 88 mm expected in total across the week. Tomorrow brings overcast with a high of 22 °C and a 9% chance of precipitation. Sunrise comes at 05:33 and sunset at 20:32, giving 15 hours of daylight. Current humidity sits at 69% with pressure near 1012 hPa. Looking further out, Thursday shows thunderstorm with a high around 25 °C, while Saturday ends the week at 25 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.
Air quality
20
Good
US AQI · European AQI 20
Air quality in Jacksonville is currently good, with a US AQI of 20 (European AQI 20). The dominant pollutant right now is ozone. Air quality is healthy; no precautions needed. Fine particulate matter (PM2.5) measures 3.4 µg/m³.
Pollutants
- PM2.5
- 3.4 µg/m³
- PM10
- 3.7 µg/m³
- Ozone (O₃)
- 50 µg/m³
- NO₂
- 7.9 µg/m³
- SO₂
- 0.5 µg/m³
- CO
- 132 µg/m³
- Dust
- 1 µg/m³
Sun & UV
- Sunrise
- 5:33 AM
- Sunset
- 8:32 PM
- Daylight
- 14h 59m
- Max UV
- 3.3 Moderate
Wind
- Wind
- 6 mph
- Gusts
- 16 mph
- Direction
- ESE (110°)
Farming weather
Soil temperatures today read surface 18.5 °C, 6 cm 20 °C, 18 cm 20.1 °C, 54 cm 19.4 °C. Soil moisture sits at 0-1 cm at 0.35 m³/m³, 3-9 cm at 0.35 m³/m³, 27-81 cm at 0.34 m³/m³. For maize, the root-zone reading is above the ideal 0.2-0.35 m³/m³ band. Forecast rain (88 mm) roughly covers crop water demand (ET0 23 mm), so irrigation can likely be paused. A suitable spraying window opens around 13:00 on 2026-06-22, with winds at or below 15 km/h and no rain expected. Projected growing degree days over the next week: maize 71, wheat 109.
- Topsoil moisture
- 0.288 m³/m³
- Soil temp
- 63°F
- ET₀ today
- 2.77 mm
- Spray window
- ~5:00
- Rain (next 7d)
- 3.5 in
- Wind
- 6 mph
- Humidity
- 81%
Advisory summary
Weather alerts for Jacksonville (derived from forecast data, not official warnings): Heavy rain today: around 56 mm expected.
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All data for Jacksonville
| Variable | Value |
|---|---|
| City | Jacksonville, Illinois, United States |
| Coordinates | 39.73394, -90.22901 |
| Elevation | 186 m |
| Timezone | America/Chicago |
| Population | 19,103 |
| Observed at (local) | 6:30 AM |
| Temperature (2 m) | 66°F |
| Apparent temperature | 68°F |
| Relative humidity (2 m) | 81% |
| Dew point (2 m) | 59°F |
| Precipitation (last hour) | 0 in |
| Rain | 0 in |
| Showers | 0 in |
| Snowfall | 0 in |
| Weather code (WMO) | 3 |
| Cloud cover | 100% |
| Surface pressure | 29.2 inHg |
| Sea-level pressure | 29.9 inHg |
| Wind speed (10 m) | 6 mph |
| Wind gusts (10 m) | 16 mph |
| Wind direction (10 m) | 110° (ESE) |
| Visibility | 10.9 mi |
| UV index | 0 |
| Day / night | Day |
| Today max / min | 77°F / 63°F |
| Today feels-like max / min | 76°F / 61°F |
| Today precipitation sum | 2.2 in |
| Today rain sum | 2.2 in |
| Today snowfall sum | 0 in |
| Today max precip probability | 86% |
| Today max wind / gusts | 20 mph / 34 mph |
| Dominant wind direction | 132° (SE) |
| Sunrise / sunset | 5:33 AM / 8:32 PM |
| Daylight duration | 14h 59m |
| Sunshine duration | 2h 41m |
| Max UV index | 3.3 |
| Reference evapotranspiration (ET₀) | 2.77 mm |
| Topsoil moisture (0–1 cm) | 0.288 m³/m³ |
| Surface soil temperature | 63°F |
| US AQI | 20 |
| European AQI | 20 |
| PM2.5 | 3.4 µg/m³ |
| PM10 | 3.7 µg/m³ |
| Ozone (O₃) | 50 µg/m³ |
| Nitrogen dioxide (NO₂) | 7.9 µg/m³ |
| Sulphur dioxide (SO₂) | 0.5 µg/m³ |
| Carbon monoxide (CO) | 132 µg/m³ |
| Dust | 1 µg/m³ |
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<iframe src="https://weathertomorrow.cloud/embed/city/us/illinois/jacksonville" width="320" height="180" frameborder="0" title="Jacksonville weather" loading="lazy"></iframe>Frequently asked questions
Will it rain in Jacksonville tomorrow?
Rain is unlikely in Jacksonville tomorrow; the precipitation chance stays around 9%.
What is the temperature in Jacksonville today?
Today Jacksonville sees violent rain showers with a high of 25 °C and a low of 17 °C.
How hot will it be in Jacksonville tomorrow?
Tomorrow's high in Jacksonville is forecast at 22 °C with overcast.
Is it windy in Jacksonville today?
Yes, yes — gusts up to 55 km/h today.
What is the UV index in Jacksonville today?
The UV index peaks at 3 today, which is moderate.
What time is sunrise and sunset in Jacksonville today?
The sun rises at 05:33 and sets at 20:32 local time.
Is the air quality in Jacksonville good today?
Air quality is good right now, with a US AQI reading of 20.