Nearby locations
Johnson County, Illinois, United States
Pond, Illinois, United States
Vienna, Illinois, United States
Nearby popular places
Taylor Bluff, United States
Deer Pond Nature Preserve, United States
Cave Creek Glade Nature Preserve, United States

Weather in Johnson County, United States

37°
Clear
Feels like 34°
·
High64°Low39°
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Air quality

Full Details
0
52
500
Air quality:Moderate

Pollen index

Full Details
Tree
2/5
012345
Weed
0/5
012345
Grass
3/5
012345

Today's weather summary

The weather in Johnson County on Tuesday, April 23rd, will be cloudy for most of the day, together with clear skies during the evening.

There is also a chance for moderate rain around noon around 12 pm, and also few clouds during the evening around 7 pm.

Weather details for Johnson County, on Tuesday, April 23rd:

The maximum temperature of the day is going to be 65°F around 7 pm. The day will have high relative humidity, with average humidity of 61%, ranging from 38% to a maximum value of 89% at about 1 pm. The wind will be breezy, and will get up to 14 mph at 1 am, blowing from the south-west. The cloud coverage will range from 0% around 9 pm to as high as 100% around 6 pm with an average of 79%.

The precipitation probability will change throughout the day between 0% and 60%. The highest chance for precipitation will be around noon and the lowest probability around midnight. The dew point will range from 32°F up to a maximum value of 50°F around 5 pm.

The visibility is expected to be good with average visibility of 9 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1013 hPa. Sunrise will be at 6:16 am, and sunset at 7:48 pm, making it a total of 13 hours and 32 minutes of daylight.

Air quality forecast for Johnson County, on Tuesday, April 23rd:

On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 36 and 47.

Pollen forecast for Johnson County, on Tuesday, April 23rd:

Tree pollen on this day is expected to have very high risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have very low risk.

The weather in Johnson County on Wednesday, April 24th, will be clear throughout the day, with cloud overcast around noon.

There is also a chance for many clouds during the morning at about 10 am.

Weather details for Johnson County, on Wednesday, April 24th:

The maximum temperature of the day will be 63°F at about 4 pm. The day will have high relative humidity, with average humidity of 62%, ranging from 47% to a maximum value of 81% at about 7 am. The wind will be light, and will get up to 9 mph at midnight, blowing from the north. The cloud coverage will range from 0% around midnight to as high as 100% around 10 pm with an average of 40%.

There is no probability for any precipitation throughout the day. The dew point will range from 37°F up to a maximum value of 44°F around 11 am.

The visibility is expected to be good with average visibility of 10 mi throughout the day. Atmospheric pressure will be high with average pressure of 1022 hPa. Sunrise will be at 6:15 am, and sunset at 7:49 pm. The day will have 13 hours and 34 minutes of daylight.

Air quality forecast for Johnson County, on Wednesday, April 24th:

On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 24 and 42.

Pollen forecast for Johnson County, on Wednesday, April 24th:

Tree pollen on this day is expected to have very high risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have very low risk.

FAQ

How warm does it get in Johnson County?
The average annual highest temperature in Johnson County is 32.8°C (91.0°F), and the July 26th is the hottest day on average.
How cold does it get in Johnson County?
The average annual lowest temperature in Johnson County is -5.6°C (21.9°F), and the January 5th is the coldest day on average.
Which month has the most rain in Johnson County?
The wettest months in Johnson County are April and May.
What months does it snow in Johnson County?
The most common time of year for snow is February and January.