The year at a glance
Averages from 30 years of climate history, 1991-2020
| Lyons | Metric | Summit |
|---|---|---|
| 180 days | Sunny daysclear or partly cloudy skies | 180 days |
| 39 in | Precipitationper year | 39 in |
| 132 days | Wet daysrain or snow per year | 132 days |
| 38 in | Snowfallper year | 38 in |
| 23 days | Hot daysabove 90 °F | 23 days |
| 110 days | Freezing nightsat or below 32 °F | 109 days |
| 71% | Humidityaverage relative | 71% |
| 52 °F | Average temperatureyear round | 52 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lyons high | 33 | 37 | 48 | 60 | 71 | 82 | 86 | 83 | 77 | 64 | 49 | 38 |
| Summit high | 33 | 37 | 48 | 60 | 71 | 81 | 86 | 83 | 77 | 64 | 49 | 38 |
| Lyons low | 19 | 22 | 31 | 41 | 52 | 62 | 67 | 66 | 58 | 46 | 35 | 25 |
| Summit low | 19 | 22 | 31 | 41 | 52 | 62 | 67 | 66 | 58 | 46 | 35 | 25 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lyons | 2.4 | 2.1 | 2.8 | 4.5 | 4.4 | 4.0 | 3.6 | 3.8 | 3.0 | 3.3 | 2.8 | 2.4 |
| Summit | 2.4 | 2.1 | 2.8 | 4.5 | 4.4 | 4.0 | 3.6 | 3.8 | 3.0 | 3.3 | 2.8 | 2.4 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lyons | 10 | 11 | 14 | 13 | 15 | 16 | 20 | 20 | 20 | 16 | 14 | 11 |
| Summit | 10 | 11 | 14 | 13 | 15 | 16 | 20 | 20 | 20 | 16 | 14 | 11 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Lyons vs another city
- Lyons vs Riverside, IL
- Lyons vs Brookfield, IL
- Lyons vs Stickney, IL
- Lyons vs North Riverside, IL
- Lyons vs Berwyn, IL
- Lyons vs New York, NY
- Lyons vs Los Angeles, CA
- Lyons vs Chicago, IL
- Lyons vs Houston, TX
- Lyons vs Phoenix, AZ
- Lyons vs Philadelphia, PA
Summit vs another city
- Summit vs Justice, IL
- Summit vs Stickney, IL
- Summit vs Riverside, IL
- Summit vs Brookfield, IL
- Summit vs Countryside, IL
- Summit vs New York, NY
- Summit vs Los Angeles, CA
- Summit vs Chicago, IL
- Summit vs Houston, TX
- Summit vs Phoenix, AZ
- Summit vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).