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

22°
Mostly clear
Feels like 22°
·
High27°Low19°
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Air quality

Full Details
0
26
500
Air quality:Good

Pollen index

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

Today's weather summary

The weather in Johnson County on Friday, July 24th, will be cloudy for most of the day, with few clouds before dawn.

There's seems to be also high probability of some clouds before dawn around 12 am.

Weather information for Johnson County, on Friday, July 24th:

The maximum temperature of the day is going to be 27°C around 5 pm. The day will have very high relative humidity, with average humidity of 71%, ranging from 48% to a maximum value of 95% at about 4 am. The wind will be calm, and will get up to 8 km/h at 10 am, blowing from the north-east. The cloud coverage will range from 4% around 8 am to as high as 100% around 11 pm with an average of 82%.

The precipitation probability will change throughout the day between 0% and 5%. The highest chance for precipitation will be around 2 pm and the lowest probability around midnight. The dew point will range from 14°C up to a maximum value of 20°C around 10 pm.

The visibility is expected to be good with average visibility of 16 km throughout the day. Atmospheric pressure will be high with average pressure of 1019 hPa. Sunrise will be at 5:53 am, and sunset at 8:10 pm. The day will have 14 hours and 17 minutes of daylight.

Air quality forecast for Johnson County, on Friday, July 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 23 and 60.

Pollen forecast for Johnson County, on Friday, July 24th:

The overall pollen forecast for this day shows no significant pollen. Tree pollen on this day is expected to have no risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have no risk.

The weather in Johnson County on Saturday, July 25th, is going to be cloudy for most of the day, together with few clouds during the evening.

There's seems to be also high probability of many clouds before dawn at about 1 am.

Weather details for Johnson County, on Saturday, July 25th:

The maximum temperature during the day will be 28°C at about 7 pm. The day will be extremely humid, with average humidity of 85%, ranging from 79% to a maximum value of 94% at about 9 am. The wind will be light, and will get up to 13 km/h at 9 am, blowing from the south. The cloud coverage will range from 18% around 11 pm to as high as 100% around 3 pm with an average of 81%.

The chances of precipitation throughout the day will change between 0% and 40%. The highest chance for precipitation will be around 7 am and the lowest probability around midnight. The dew point will range from 19°C up to a maximum value of 26°C around 10 pm.

The visibility is expected to be good with average visibility of 15 km throughout the day. Atmospheric pressure will be normal with average pressure of 1016 hPa. Sunrise will be at 5:53 am, and sunset at 8:09 pm, making it a total of 14 hours and 16 minutes of daylight.

Air quality forecast for Johnson County, on Saturday, July 25th:

On average, the air quality on this day will be moderate, meaning that air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. According to our index, ranging from 0 to 500, the air quality is going to be between values of 52 and 64.

Pollen forecast for Johnson County, on Saturday, July 25th:

The overall pollen forecast for this day shows no significant pollen. Tree pollen on this day is expected to have no risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have no 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.