Pere Marquette Park – Weather Forecast
Grafton, Illinois, US
This page shows a route-based weather forecast for the Pere Marquette Park cycling climb in Grafton, Illinois, US. Unlike a simple location forecast, conditions are calculated at every point along the climb — from the base to the summit — using the actual route profile and elevation data.
You'll see hour-by-hour temperature, wind speed and direction, precipitation probability, and cloud cover adjusted for altitude. Choose your planned departure time to align the forecast with your ride.
Pere Marquette Park
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Calculating weather along route...
Trip Summary
Forecast A
Trip Summary A
Forecast B
Trip Summary B
Weather Display Options
Forecast A - Route Map
Forecast B - Route Map
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Same departure time & speed — opposite direction
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Route Map
Elevation Profile
Temperature Along Route
Precipitation & Precipitation Probability Along Route
Wind Along Route
Humidity Along Route
Pollen Along Route
UV Index Along Route
Start place details
Weather Forecast
Hourly around Sun 30 Aug 04:32
Climate Overview
| Month |
Temp Day
|
Temp Night
|
Sunny Days
|
Sun Hours
|
Rain Days
|
Precipitation
|
Humidity
|
UV Index
|
Day Length
|
|---|---|---|---|---|---|---|---|---|---|
| Jan | 0°C | -9°C | 21 | 7.0h | 9 | 42 mm | 75 % | 2 | 9h 48m |
| Feb | 4°C | -5°C | 17 | 6.8h | 12 | 32 mm | 73 % | 3 | 10h 46m |
| Mar | 16°C | 4°C | 26 | 9.1h | 11 | 113 mm | 70 % | 4 | 11h 59m |
| Apr | 18°C | 8°C | 18 | 8.0h | 17 | 157 mm | 68 % | 5 | 13h 15m |
| May | 21°C | 12°C | 24 | 10.1h | 17 | 127 mm | 65 % | 6 | 14h 19m |
| Jun | 27°C | 19°C | 24 | 10.7h | 17 | 137 mm | 67 % | 7 | 14h 51m |
| Jul | 30°C | 22°C | 30 | 11.6h | 20 | 126 mm | 66 % | 8 | 14h 34m |
| Aug | 28°C | 19°C | 31 | 12.4h | 10 | 25 mm | 68 % | 7 | 13h 37m |
| Sep | 26°C | 16°C | 29 | 10.9h | 6 | 29 mm | 70 % | 5 | 12h 24m |
| Oct | 21°C | 11°C | 23 | 8.5h | 10 | 98 mm | 72 % | 4 | 11h 9m |
| Nov | 12°C | 3°C | 20 | 6.4h | 9 | 51 mm | 76 % | 2 | 10h 2m |
| Dec | 6°C | -4°C | 19 | 5.4h | 6 | 14 mm | 77 % | 2 | 9h 29m |