2025 Compare Climate & Weather:
Sycamore, IL vs Janesville, WI

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Highlights

On average, there are 185 sunny days per year in Janesville. Sycamore averages 194 sunny days per year. The US average is 205 sunny days.

Janesville, Wisconsin gets 35.5 inches of rain, on average, per year. Sycamore, Illinois gets 37.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Janesville averages 34.2 inches of snow per year. Sycamore averages 31.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Janesville, Wisconsin
Summer High: the July high is around 82.9 degrees
Winter Low: the January low is 11.2
Rain: averages 35.5 inches of rain a year
Snow: averages 34.2 inches of snow a year

Sycamore, Illinois
Summer High: the July high is around 82.9 degrees
Winter Low: the January low is 12.3
Rain: averages 37.2 inches of rain a year
Snow: averages 31.2 inches of snow a year

BestPlaces Comfort Index

Janesville

The annual BestPlaces Comfort Index for Janesville is 6.8 (10=best), which means it is one of the most pleasant places in Wisconsin.

6.8 / 10

June, August and September are the most pleasant months in Janesville, while January and December are the least comfortable months.

Sycamore

The annual BestPlaces Comfort Index for Sycamore is 6.8 (10=best), which means it is less comfortable than most places in Illinois.

6.8 / 10

June, September and August are the most pleasant months in Sycamore, while January and December are the least comfortable months.

Average Monthly High / Low (°F)

Month	Sycamore, IL	Janesville, WI
January	28° / 12°	28° / 11°
February	33° / 17°	32° / 15°
March	45° / 27°	44° / 26°
April	59° / 37°	58° / 37°
May	70° / 48°	69° / 48°
June	80° / 58°	79° / 58°
July	83° / 62°	83° / 62°
August	81° / 60°	81° / 60°
September	74° / 51°	74° / 51°
October	62° / 39°	61° / 39°
November	47° / 29°	46° / 29°
December	32° / 17°	32° / 16°

Hot, Freezing, Rainy, Snowy Days: Sycamore / Janesville

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	30 / 30	9 / 9	6 / 6
February	0 / 0	26 / 26	8 / 8	4 / 4
March	0 / 0	23 / 24	10 / 9	2 / 2
April	0 / 0	9 / 9	11 / 11	1 / 0
May	0 / 0	1 / 1	12 / 12	0 / 0
June	3 / 2	0 / 0	11 / 11	0 / 0
July	3 / 4	0 / 0	10 / 10	0 / 0
August	2 / 2	0 / 0	10 / 10	0 / 0
September	1 / 0	0 / 0	9 / 9	0 / 0
October	0 / 0	7 / 7	9 / 10	0 / 0
November	0 / 0	18 / 19	9 / 9	1 / 1
December	0 / 0	28 / 28	10 / 10	5 / 5

July is the hottest month for Sycamore with an average high temperature of 82.9°, which ranks it as one of the coolest places in Illinois. In Sycamore, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sycamore are June, August and September.

July is the hottest month for Janesville with an average high temperature of 82.9°, which ranks it as warmer than most places in Wisconsin. In Janesville, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Janesville are June, August and September.

January has the coldest nighttime temperatures for Sycamore with an average of 12.3°. This is one of the coldest places in Illinois.

January has the coldest nighttime temperatures for Janesville with an average of 11.2°. This is warmer than most places in Wisconsin.

In Sycamore, there are 9.3 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Janesville, there are 8.7 days annually when the high temperature is over 90°, which is hotter than most places in Wisconsin.

In Sycamore, there are 141.4 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Illinois.

In Janesville, there are 144.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wisconsin.

In Sycamore, there are 12.8 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Illinois.

In Janesville, there are 15.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wisconsin.

August is the wettest month in Sycamore with 4.8 inches of rain, and the driest month is January with 1.5 inches. The wettest season is Autumn with 36% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 37.2 inches in Sycamore means that it is drier than most places in Illinois.

August is the wettest month in Janesville with 4.4 inches of rain, and the driest month is January with 1.3 inches. The wettest season is Autumn with 35% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 35.5 inches in Janesville means that it is wetter than most places in Wisconsin.

May is the rainiest month in Sycamore with 11.8 days of rain, and February is the driest month with only 7.7 rainy days. There are 116.6 rainy days annually in Sycamore, which is rainier than most places in Illinois. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 23% chance of a rainy day.

May is the rainiest month in Janesville with 11.7 days of rain, and February is the driest month with only 7.5 rainy days. There are 116.3 rainy days annually in Janesville, which is rainier than most places in Wisconsin. The rainiest season is Summer when it rains 27% of the time and the driest is Spring with only a 23% chance of a rainy day.

An annual snowfall of 31.2 inches in Sycamore means that it is snowier than most places in Illinois.

An annual snowfall of 34.2 inches in Janesville means that it is one of the least snowy places in Wisconsin.

January is the snowiest month in Sycamore with 9.6 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Janesville with 10.2 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Sycamore 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More

| Reply

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Reviews for Janesville 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More

| Reply

Start Your Review of Janesville

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2025 Compare Climate & Weather:
Sycamore, IL vs Janesville, WI

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Sycamore / Janesville

January has the coldest nighttime temperatures for Sycamore with an average of 12.3°. This is one of the coldest places in Illinois.

January has the coldest nighttime temperatures for Janesville with an average of 11.2°. This is warmer than most places in Wisconsin.

In Sycamore, there are 9.3 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Janesville, there are 8.7 days annually when the high temperature is over 90°, which is hotter than most places in Wisconsin.

In Sycamore, there are 141.4 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Illinois.

In Janesville, there are 144.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wisconsin.

In Sycamore, there are 12.8 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Illinois.

In Janesville, there are 15.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wisconsin.

An annual snowfall of 31.2 inches in Sycamore means that it is snowier than most places in Illinois.

An annual snowfall of 34.2 inches in Janesville means that it is one of the least snowy places in Wisconsin.

January is the snowiest month in Sycamore with 9.6 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Janesville with 10.2 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Sycamore 2 Reviews

Reviews for Janesville 2 Reviews

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2025 Compare Climate & Weather:Sycamore, IL vs Janesville, WI

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Sycamore / Janesville

January has the coldest nighttime temperatures for Sycamore with an average of 12.3°. This is one of the coldest places in Illinois.January has the coldest nighttime temperatures for Janesville with an average of 11.2°. This is warmer than most places in Wisconsin.

In Sycamore, there are 9.3 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.In Janesville, there are 8.7 days annually when the high temperature is over 90°, which is hotter than most places in Wisconsin.

In Sycamore, there are 141.4 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Illinois.In Janesville, there are 144.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wisconsin.

In Sycamore, there are 12.8 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Illinois.In Janesville, there are 15.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wisconsin.

An annual snowfall of 31.2 inches in Sycamore means that it is snowier than most places in Illinois.An annual snowfall of 34.2 inches in Janesville means that it is one of the least snowy places in Wisconsin.

January is the snowiest month in Sycamore with 9.6 inches of snow, and 6 months of the year have significant snowfall.January is the snowiest month in Janesville with 10.2 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Sycamore 2 Reviews

Reviews for Janesville 2 Reviews

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Zips In Sycamore, Illinois

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2025 Compare Climate & Weather:
Sycamore, IL vs Janesville, WI

January has the coldest nighttime temperatures for Sycamore with an average of 12.3°. This is one of the coldest places in Illinois.

January has the coldest nighttime temperatures for Janesville with an average of 11.2°. This is warmer than most places in Wisconsin.

In Sycamore, there are 9.3 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Janesville, there are 8.7 days annually when the high temperature is over 90°, which is hotter than most places in Wisconsin.

In Sycamore, there are 141.4 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Illinois.

In Janesville, there are 144.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wisconsin.

In Sycamore, there are 12.8 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Illinois.

In Janesville, there are 15.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wisconsin.

An annual snowfall of 31.2 inches in Sycamore means that it is snowier than most places in Illinois.

An annual snowfall of 34.2 inches in Janesville means that it is one of the least snowy places in Wisconsin.

January is the snowiest month in Sycamore with 9.6 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Janesville with 10.2 inches of snow, and 6 months of the year have significant snowfall.