The best times to visit Rockford for ideal weather are

April 30th to July 8th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Rockford Travel Info

Weather in Rockford


Average temperatures in Rockford vary an incredible amount. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 25th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Rockford, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 87.4°F (30.8°C) with temperatures rarely dropping below 63.6°F (17.6°C) at night.

Rockford Temperatures (Fahrenheit)


Rockford Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Rockford Perceived Temperature (F)


Rockford Perceived Temperature (C)



Average Rockford Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 31.4 20.9 11.3
Feb 31.8 21.9 12.3
Mar 49.8 37.7 27.1
Apr 63.5 49.4 36.9
May 76 61.7 48.2
Jun 83.1 70.5 58.4
Jul 85.9 73.7 61.7
Aug 84.2 71.8 60.4
Sep 79 64.6 52.5
Oct 66 52.5 41.1
Nov 51 39.5 29
Dec 36.6 27.6 19

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -0.3 -6.2 -11.5
Feb -0.1 -5.6 -10.9
Mar 9.9 3.2 -2.7
Apr 17.5 9.7 2.7
May 24.4 16.5 9
Jun 28.4 21.4 14.7
Jul 29.9 23.2 16.5
Aug 29 22.1 15.8
Sep 26.1 18.1 11.4
Oct 18.9 11.4 5.1
Nov 10.6 4.2 -1.7
Dec 2.6 -2.4 -7.2



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Rockford are January, September, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid January. For example, on the week of January 15th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in late April with an average of 2 days of significant precipitation the week of April 23rd.

When can you find snow in Rockford? Weather stations report large amounts of snow likely to be deepest around February, especially close to early February. The best time to ski (if at all) in Rockford is often around around December 17th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Rockford.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Rockford (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 13% 4.8 1.4
Feb 18% 5.8 1.8
Mar 19% 3.3 2.5
Apr 26% 1.7 4.3
May 23% 0 3.3
Jun 32% 0 5.5
Jul 18% 0 4.2
Aug 23% 0 5.4
Sep 17% 0 2.9
Oct 18% 0 2.6
Nov 17% 2.9 2.2
Dec 21% 4.2 2.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 13 12.2 3.6
Feb 18 14.7 4.6
Mar 19 8.4 6.4
Apr 26 4.3 10.9
May 23 0 8.4
Jun 32 0 14
Jul 18 0 10.7
Aug 23 0 13.7
Sep 17 0 7.4
Oct 18 0 6.6
Nov 17 7.4 5.6
Dec 21 10.7 7.1


Humidity and Wind

Rockford has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is April (49% relative humidity), and the most humid month is December (69.1%).

Wind in Rockford is usually moderate. The windiest month is April, followed by November and March. April’s average wind speed of around 9.3 knots (10.8 MPH or 17.3 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid April where average top sustained speeds reach 17.3 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Rockford.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 8.3 Gentle breeze 14.8 Significant breeze
Feb 8.2 Gentle breeze 14.8 Significant breeze
Mar 8.3 Gentle breeze 15.1 Significant breeze
Apr 9.3 Gentle breeze 17.1 Strong breeze
May 8.1 Gentle breeze 15.9 Significant breeze
Jun 6.8 Light breeze 14.7 Significant breeze
Jul 5.8 Light breeze 13.2 Significant breeze
Aug 5.3 Light breeze 12.3 Significant breeze
Sep 6 Light breeze 12.9 Significant breeze
Oct 7.3 Gentle breeze 14.3 Significant breeze
Nov 8.3 Gentle breeze 15.1 Significant breeze
Dec 7.9 Gentle breeze 14.3 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 62.6%
Feb 60.9%
Mar 55.5%
Apr 49%
May 51.3%
Jun 58.4%
Jul 59.6%
Aug 63.1%
Sep 59.8%
Oct 57.8%
Nov 59.5%
Dec 69.1%


Is it Safe to Travel to Rockford?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Rockford, IL, US is March, followed by July and October. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Rockford in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 63.1 in December means 63.1% of the tourists vs. March.



Overall Rockford Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 80.6°F (27°C) and 35°F (1.7°C) with far warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 6 to 10 days of precipitation per month. June – August is the busiest season for tourism in Rockford, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 82.2°F (27.9°C) and 43.2°F (6.2°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 6 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is far too cold this time of year in Rockford to be enjoyable for warm weather travelers. The average high during this season is between 37.6°F (3.1°C) and 28.4°F (-2°C). On average, it rains or snows a fair amount: 4 to 6 times per month. These times of year are the slowest with tourists.


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