Best Time to Bike in Chicago: Month-by-Month Weather and Season Guide

Chicago has a real riding season and a real off-season. Pick your month with the numbers below, then plan the rest of your trip in Plan a Ride.

The short answer

Ride from mid-May to early October. Average highs reach 70.5 F in May and stay at or above 75.5 F from July through September¹. Highs of 50 F or more occur on 30 or 31 days in each of May through September¹. September combines comfortable temperatures with smaller crowds⁶.

Month by month

These are the National Weather Service’s 1991–2020 normals for Chicago¹. Highs and lows are in degrees Fahrenheit; precipitation and snowfall are in inches.

Month	Avg high	Avg low	Precipitation	Snowfall
January	31.6	18.8	1.99	11.31
February	35.7	21.8	1.97	10.71
March	47.0	31.0	2.45	5.51
April	59.0	40.3	3.75	1.31
May	70.5	50.6	4.49	trace1
June	80.4	60.8	4.10	0.01
July	84.5	66.4	3.71	0.01
August	82.5	65.1	4.25	0.01
September	75.5	57.1	3.19	0.01
October	62.7	45.4	3.43	0.21
November	48.4	34.1	2.42	1.81
December	36.6	24.4	2.11	7.61

The year totals 37.86 inches of precipitation and 38.4 inches of snow¹.

Spring: patient riders win

Spring swings. March, April and May can jump between warm and cool days within a week, with rain or snow possible⁶. In March, highs average 47.0 F and cross 50 F on 11.5 days¹. In April the average high is 59.0 F and 23.4 days reach 50 F or more¹.

The last spring freeze normally falls on April 21 at O’Hare³. The earliest on record came March 19, 1925. The latest came May 25, 1992³. Do not plan a long trail day in April without layers.

May is the first reliable month. The average high is 70.5 F and 30.3 days reach 50 F or more¹. Outdoor vendors and beach services mostly open on Memorial Day weekend at the end of May, and the weekend officially opens the summer season⁶.

Summer: warm, busy, early starts

June through August is peak season. June averages 80.4 F, July 84.5 F and August 82.5 F¹. Highs of 90 F or more occur on 4.1 days in June, 6.5 in July and 3.7 in August¹. Midday heat can be intense in July and August, so ride mornings and evenings⁶.

The beaches run on a fixed calendar. The season runs from the Friday before Memorial Day through Labor Day, with lifeguards on duty from 11 am to 7 pm⁵. The Lakefront Trail is often crowded on summer weekends⁶. If you want a quieter trail, ride on a weekday or at first light.

September: the best month

September is the month to book. The average high is 75.5 F and the average low is 57.1 F¹. The summer crowds disappear after Labor Day while the weather stays comfortable⁶. Highs reach 90 F on only 1.6 days¹.

Bike the Drive 2026 was held Sunday, September 6, starting at 6:30 am⁷. Helmets were required, with slower riders to the right and faster riders to the left⁷. Closures began at 10:30 am, when people biking could no longer enter DuSable Lake Shore Drive at Jackson⁷. Read the Bike the Drive guide for the next edition.

The first weekend of September is also popular for the free Jazz Festival⁶.

October: short days, last good rides

October is crisp. The average high falls to 62.7 F and the low to 45.4 F¹. Fall colors peak in mid-to-late October⁶. The normal first autumn freeze at O’Hare is October 19. The earliest on record was September 22, 1995, and the latest was November 24, 1931².

By the end of October and the start of November, Buckingham Fountain shuts down, public restrooms close and harbors begin winter preparations⁶. Plan restroom stops accordingly. The normal first trace of snow arrives October 31⁴.

Winter: possible, not casual

Chicago riders do ride in winter. The question is preparation. January’s average high is 31.6 F and its average low 18.8 F¹. Highs stay at or below 32 F on 16.5 days in January and 11.2 in February¹. Lows reach 32 F or lower on 28.1 days in January¹.

Snow arrives on a pattern. The normal first measurable snow is November 18 and the last is April 2⁴. The normal first snowfall of one inch or more is December 7 and the last is March 20⁴. The wind off Lake Michigan in January and February can be brutal⁶. Ride neighborhood streets instead of the lakefront in those months.

Dress in three layers, because cold-weather riding is all about layering⁸. Regular tires work in winter except in heavy snow of more than 3 inches⁸. Fit fenders to deter road gunk⁸. Main streets are cleared first but carry more traffic⁸. The City’s Department of Transportation plows about 70 miles of protected bike lanes. The Department of Streets and Sanitation clears paint-only lanes⁹. For the full kit list, see winter cycling in Chicago.

Choose by what you want

If you want	Ride in
Warmest weather	July: 84.5 F average high1
Fewest crowds with good weather	September, after Labor Day6
Lifeguarded beach stops	Friday before Memorial Day through Labor Day5
A car-free Lake Shore Drive	Bike the Drive, held September 6 in 20267
Zero average snowfall	June through September1